UNION ELECTRIC CO, 10-K filed on 2/28/2012
Annual Report
Document And Entity Information (USD $)
12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Jun. 30, 2011
Jan. 31, 2012
Ameren Corporation [Member]
Dec. 31, 2011
Union Electric Company [Member]
Jan. 31, 2012
Union Electric Company [Member]
Dec. 31, 2011
Ameren Illinois Company [Member]
Jan. 31, 2012
Ameren Illinois Company [Member]
Dec. 31, 2011
Ameren Energy Generating Company [Member]
Jan. 31, 2012
Ameren Energy Generating Company [Member]
Document Type
10-K 
 
 
10-K 
 
10-K 
 
10-K 
 
Amendment Flag
false 
 
 
false 
 
false 
 
false 
 
Document Period End Date
Dec. 31, 2011 
 
 
Dec. 31, 2011 
 
Dec. 31, 2011 
 
Dec. 31, 2011 
 
Document Fiscal Year Focus
2011 
 
 
2011 
 
2011 
 
2011 
 
Document Fiscal Period Focus
FY 
 
 
FY 
 
FY 
 
FY 
 
Trading Symbol
AEE 
 
 
 
 
 
 
 
 
Entity Registrant Name
AMEREN CORP 
 
 
UNION ELECTRIC CO 
 
AMEREN ILLINOIS CO 
 
AMEREN ENERGY GENERATING CO 
 
Entity Central Index Key
0001002910 
 
 
0000100826 
 
0000018654 
 
0001135361 
 
Current Fiscal Year End Date
--12-31 
 
 
--12-31 
 
--12-31 
 
--12-31 
 
Entity Filer Category
Large Accelerated Filer 
 
 
Non-accelerated Filer 
 
Non-accelerated Filer 
 
Non-accelerated Filer 
 
Entity Common Stock, Shares Outstanding
 
 
242,634,742 
 
102,123,834 
 
25,452,373 
 
2,000 
Entity Voluntary Filers
No 
 
 
No 
 
No 
 
Yes 
 
Entity Current Reporting Status
Yes 
 
 
Yes 
 
Yes 
 
Yes 
 
Entity Public Float
 
$ 6,967,355,641 
 
 
 
 
 
 
 
Entity Well-known Seasoned Issuer
Yes 
 
 
No 
 
No 
 
No 
 
Consolidated Statement Of Income (Loss) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating Revenues:
 
 
 
Electric
$ 6,530 
$ 6,521 
$ 5,940 
Gas
1,001 
1,117 
1,195 
Total operating revenues
7,531 
7,638 
7,135 
Operating Expenses:
 
 
 
Fuel
1,567 
1,323 
1,141 
Purchased power
966 
1,106 
909 
Gas purchased for resale
570 
669 
749 
Other operations and maintenance
1,820 
1,821 
1,768 
Goodwill and other impairment charges
125 1
589 1
1
Depreciation and amortization
785 
765 
725 
Taxes other than income taxes
457 
449 
420 
Total operating expenses
6,290 
6,722 
5,719 
Operating income (loss)
1,241 
916 
1,416 
Other Income and Expenses:
 
 
 
Miscellaneous income
69 2
90 2
71 2
Miscellaneous expense
23 2
33 2
23 2
Total other income (expense)
46 
57 
48 
Interest Charges
451 
497 
508 
Income (Loss) Before Income Taxes
836 
476 
956 
Income tax (benefit)
310 3
325 3
332 3
Net Income (Loss)
526 
151 
624 
Less: Net Income Attributable to Noncontrolling Interests
12 
12 
Net Income Attributable to Ameren Corporation
519 4
139 4
612 4
Earnings per Common Share - Basic and Diluted
$ 2.15 
$ 0.58 
$ 2.78 
Dividends per Common Share
$ 1.555 
$ 1.540 
$ 1.540 
Average Common Shares Outstanding
241.5 
238.8 
220.4 
Union Electric Company [Member]
 
 
 
Operating Revenues:
 
 
 
Electric
3,222 
3,030 
2,700 
Gas
156 
166 
170 
Other
Total operating revenues
3,383 
3,197 
2,874 
Operating Expenses:
 
 
 
Fuel
866 
635 
593 
Purchased power
104 
162 
124 
Gas purchased for resale
77 
91 
97 
Other operations and maintenance
934 
931 
880 
Loss from regulatory disallowance
89 
 
 
Depreciation and amortization
408 
382 
357 
Taxes other than income taxes
296 
285 
257 
Total operating expenses
2,774 
2,486 
2,308 
Operating income (loss)
609 
711 
566 
Other Income and Expenses:
 
 
 
Miscellaneous income
61 
83 
63 
Miscellaneous expense
10 
13 
Total other income (expense)
51 
70 
56 
Interest Charges
209 
213 
229 
Income (Loss) Before Income Taxes
451 
568 
393 
Income tax (benefit)
161 
199 
128 
Net Income (Loss)
290 
369 
265 
Preferred Stock Dividends
Net Income Available to Common Stockholder
287 
364 
259 
Ameren Illinois Company [Member]
 
 
 
Operating Revenues:
 
 
 
Electric
1,940 
2,061 
1,965 5
Gas
846 
953 
1,015 5
Other
 
5
Total operating revenues
2,787 
3,014 
2,984 5
Operating Expenses:
 
 
 
Purchased power
853 
965 
1,048 5
Gas purchased for resale
492 
578 
642 5
Other operations and maintenance
640 
635 
590 5
Depreciation and amortization
215 
210 
216 5
Taxes other than income taxes
129 
128 
125 5
Total operating expenses
2,329 
2,516 
2,621 5
Operating income (loss)
458 
498 
363 5
Other Income and Expenses:
 
 
 
Miscellaneous income
12 5
Miscellaneous expense
13 
10 5
Total other income (expense)
(6)
5
Interest Charges
136 
143 
153 5
Income (Loss) Before Income Taxes
323 
349 
212 5
Income tax (benefit)
127 
137 
79 5
Income from Continuing Operations
196 
212 
133 5
Income from Discontinued Operations, net of tax
 
40 
114 5 6
Net Income (Loss)
196 
252 
247 5 6
Preferred Stock Dividends
5
Net Income Available to Common Stockholder
193 
248 
241 5
Ameren Energy Generating Company [Member]
 
 
 
Operating Revenues:
 
 
 
Total operating revenues
1,066 
1,126 
1,148 7
Operating Expenses:
 
 
 
Fuel
541 
522 
415 7
Purchased power
55 
61 
72 7
Other operations and maintenance
179 
191 
226 7
Goodwill and other impairment charges
35 
170 
7
Depreciation and amortization
96 
98 
81 7
Taxes other than income taxes
21 
22 
24 7
Total operating expenses
927 
1,064 
824 7
Operating income (loss)
139 
62 
324 7
Other Income and Expenses:
 
 
 
Miscellaneous income
7
Miscellaneous expense
 
7
Total other income (expense)
 
 
Interest Charges
63 
78 
61 7
Income (Loss) Before Income Taxes
77 
(16)
263 7
Income tax (benefit)
32 
20 
101 7
Net Income (Loss)
45 
(36)
162 7
Less: Net Income Attributable to Noncontrolling Interests
7
Net Income Attributable to Ameren Corporation
$ 44 
$ (39)
$ 160 7
Consolidated Balance Sheet (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Current Assets:
 
 
Cash and cash equivalents
$ 255 
$ 545 
Accounts receivable - trade (less allowance for doubtful accounts)
473 
517 
Unbilled revenue
324 
406 
Miscellaneous accounts and notes receivable
69 
210 
Materials and supplies
712 1
707 1
Mark-to-market derivative assets
115 
129 
Current regulatory assets
215 2
267 
Other current assets
132 
109 
Total current assets
2,295 
2,890 
Property and Plant, Net
18,127 3 4
17,853 3 4
Investments and Other Assets:
 
 
Nuclear decommissioning trust fund
357 
337 
Goodwill
411 
411 5
Intangible assets
Regulatory assets
1,603 2
1,263 
Other assets
845 
750 
Total investments and other assets
3,223 
2,768 
TOTAL ASSETS
23,645 
23,511 
Current Liabilities:
 
 
Current maturities of long-term debt
179 
155 
Short-term debt
148 
269 
Accounts and wages payable
693 
651 
Taxes accrued
65 
63 
Interest accrued
101 
107 
Customer deposits
98 
100 
Mark-to-market derivative liabilities
161 
161 
Current regulatory liabilities
133 2
99 
Other current liabilities
207 
283 
Total current liabilities
1,785 
1,888 
Credit Facility Borrowings
 
460 
Long-term Debt, Net
6,677 
6,853 
Deferred Credits and Other Liabilities:
 
 
Accumulated deferred income taxes, net
3,315 
2,882 
Accumulated deferred investment tax credits
79 
90 
Regulatory liabilities
1,502 2
1,319 
Asset retirement obligations
428 
475 
Pension and other postretirement benefits
1,344 
1,045 
Other deferred credits and liabilities
447 
615 
Total deferred credits and other liabilities
7,115 
6,426 
Commitments and Contingencies (Notes 2, 10, 14 and 15)
   
   
Stockholders' Equity:
 
 
Common stock
Other paid-in capital, principally premium on common stock
5,598 
5,520 
Retained earnings
2,369 
2,225 
Accumulated other comprehensive income (loss)
(50)
(17)
Total stockholders' equity
7,919 
7,730 
Noncontrolling Interests
149 
154 
Total equity
8,068 
7,884 
TOTAL LIABILITIES AND EQUITY
23,645 
23,511 
Union Electric Company [Member]
 
 
Current Assets:
 
 
Cash and cash equivalents
201 
202 
Accounts receivable - trade (less allowance for doubtful accounts)
212 
217 
Accounts receivable - affiliates
Unbilled revenue
139 
159 
Miscellaneous accounts and notes receivable
42 
116 
Materials and supplies
348 
341 
Current regulatory assets
109 
179 
Other current assets
82 
55 
Total current assets
1,134 
1,275 
Property and Plant, Net
9,958 
9,775 
Investments and Other Assets:
 
 
Nuclear decommissioning trust fund
357 
337 
Intangible assets
Regulatory assets
855 
694 
Other assets
446 
421 
Total investments and other assets
1,665 
1,454 
TOTAL ASSETS
12,757 
12,504 
Current Liabilities:
 
 
Current maturities of long-term debt
178 
Accounts and wages payable
414 
326 
Accounts payable - affiliates
73 
75 
Taxes accrued
74 
76 
Interest accrued
62 
63 
Current regulatory liabilities
57 
23 
Current accumulated deferred income taxes, net
 
43 
Other current liabilities
84 
89 
Total current liabilities
942 
700 
Long-term Debt, Net
3,772 
3,949 
Deferred Credits and Other Liabilities:
 
 
Accumulated deferred income taxes, net
2,132 
1,908 
Accumulated deferred investment tax credits
70 
78 
Regulatory liabilities
836 
766 
Asset retirement obligations
328 
363 
Pension and other postretirement benefits
491 
369 
Other deferred credits and liabilities
149 
218 
Total deferred credits and other liabilities
4,006 
3,702 
Commitments and Contingencies (Notes 2, 10, 14 and 15)
   
   
Stockholders' Equity:
 
 
Common stock
511 
511 
Other paid-in capital, principally premium on common stock
1,555 
1,555 
Preferred stock not subject to mandatory redemption
80 
80 
Retained earnings
1,891 
2,007 
Total stockholders' equity
4,037 
4,153 
TOTAL LIABILITIES AND EQUITY
12,757 
12,504 
Ameren Illinois Company [Member]
 
 
Current Assets:
 
 
Cash and cash equivalents
21 
322 
Accounts receivable - trade (less allowance for doubtful accounts)
201 
230 
Accounts receivable - affiliates
15 
73 
Unbilled revenue
146 
205 
Miscellaneous accounts and notes receivable
44 
Materials and supplies
199 
198 
Current regulatory assets
306 
260 
Current accumulated deferred income taxes, net
58 
43 
Other current assets
65 
63 
Total current assets
1,017 
1,438 
Property and Plant, Net
4,770 
4,576 
Investments and Other Assets:
 
 
Tax receivable - Genco
56 
72 
Goodwill
411 
411 
Regulatory assets
748 
747 
Other assets
211 
162 
Total investments and other assets
1,426 
1,392 
TOTAL ASSETS
7,213 
7,406 
Current Liabilities:
 
 
Current maturities of long-term debt
150 
Accounts and wages payable
133 
182 
Accounts payable - affiliates
103 
82 
Taxes accrued
15 
26 
Customer deposits
76 
83 
Mark-to-market derivative liabilities
99 
82 
Mark-to-market derivative liabilities - affiliates
200 
172 
Environmental remediation
63 
72 
Current regulatory liabilities
76 
76 
Other current liabilities
92 
90 
Total current liabilities
858 
1,015 
Long-term Debt, Net
1,657 
1,657 
Deferred Credits and Other Liabilities:
 
 
Accumulated deferred income taxes, net
895 
724 
Accumulated deferred investment tax credits
Regulatory liabilities
666 
553 
Pension and other postretirement benefits
495 
413 
Other deferred credits and liabilities
183 
460 
Total deferred credits and other liabilities
2,246 
2,158 
Commitments and Contingencies (Notes 2, 10, 14 and 15)
   
   
Stockholders' Equity:
 
 
Common stock
   
   
Other paid-in capital, principally premium on common stock
1,965 
1,952 
Preferred stock not subject to mandatory redemption
62 
62 
Retained earnings
408 
542 
Accumulated other comprehensive income (loss)
17 
20 
Total stockholders' equity
2,452 
2,576 
TOTAL LIABILITIES AND EQUITY
7,213 
7,406 
Ameren Energy Generating Company [Member]
 
 
Current Assets:
 
 
Cash and cash equivalents
Advances to money pool
74 
25 
Accounts receivable - affiliates
89 
126 
Miscellaneous accounts and notes receivable
13 
15 
Materials and supplies
122 
130 
Mark-to-market derivative assets
12 
26 
Other current assets
Total current assets
325 
332 
Property and Plant, Net
2,231 
2,248 
Investments and Other Assets:
 
 
Intangible assets
 
Other assets
16 
24 
Total investments and other assets
16 
27 
TOTAL ASSETS
2,572 
2,607 
Current Liabilities:
 
 
Accounts and wages payable
71 
62 
Accounts payable - affiliates
13 
23 
Current portion of tax payable - Ameren Illinois
Taxes accrued
20 
20 
Interest accrued
13 
13 
Mark-to-market derivative liabilities
Mark-to-market derivative liabilities - affiliates
 
Current accumulated deferred income taxes, net
 
13 
Other current liabilities
14 
12 
Total current liabilities
142 
165 
Credit Facility Borrowings
 
100 
Long-term Debt, Net
824 
824 
Deferred Credits and Other Liabilities:
 
 
Accumulated deferred income taxes, net
304 
249 
Accumulated deferred investment tax credits
Tax payable - Ameren Illinois
56 
72 
Asset retirement obligations
66 
74 
Pension and other postretirement benefits
141 
88 
Other deferred credits and liabilities
12 
23 
Total deferred credits and other liabilities
581 
509 
Commitments and Contingencies (Notes 2, 10, 14 and 15)
   
   
Stockholders' Equity:
 
 
Common stock
   
   
Other paid-in capital, principally premium on common stock
653 
649 
Retained earnings
437 
393 
Accumulated other comprehensive income (loss)
(72)
(44)
Total stockholders' equity
1,018 
998 
Noncontrolling Interests
11 
Total equity
1,025 
1,009 
TOTAL LIABILITIES AND EQUITY
$ 2,572 
$ 2,607 
Consolidated Balance Sheet (Parenthetical) (USD $)
In Millions, except Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Accounts receivable - trade, allowance for doubtful accounts
$ 20 
$ 23 
Common stock, par value
$ 0.01 
$ 0.01 
Common stock, shares authorized
400,000,000 
400,000,000 
Common stock, shares outstanding
242,600,000 
240,400,000 
Union Electric Company [Member]
 
 
Accounts receivable - trade, allowance for doubtful accounts
Common stock, par value
$ 5 
$ 5 
Common stock, shares authorized
150,000,000 
150,000,000 
Common stock, shares outstanding
102,100,000 
102,100,000 
Ameren Illinois Company [Member]
 
 
Accounts receivable - trade, allowance for doubtful accounts
$ 13 
$ 13 
Common stock, no par value
   
   
Common stock, shares authorized
45,000,000 
45,000,000 
Common stock, shares outstanding
25,500,000 
25,500,000 
Ameren Energy Generating Company [Member]
 
 
Common stock, no par value
   
   
Common stock, shares authorized
10,000 
10,000 
Common stock, shares outstanding
2,000 
2,000 
Consolidated Statement Of Cash Flows (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Cash Flows From Operating Activities:
 
 
 
Net income (loss)
$ 526 
$ 151 
$ 624 
Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
Goodwill and other impairment charges
125 1
589 1
1
Gain on sales of properties
(15)
(10)
 
Net mark-to-market (gain) loss on derivatives
11 
(15)
(23)
Depreciation and amortization
747 
746 
708 
Amortization of nuclear fuel
61 
54 
53 
Amortization of debt issuance costs and premium/discounts
21 
23 
25 
Deferred income taxes and investment tax credits, net
346 
410 
290 
Allowance for equity funds used during construction
(34)2
(52)2
(36)2
Other
 
21 
(24)
Changes in assets and liabilities:
 
 
 
Receivables
231 
(197)
136 
Materials and supplies
(27)
73 
63 
Accounts and wages payable
(36)
20 
(40)
Taxes accrued
(3)
10 
Assets, other
76 
(47)
11 
Liabilities, other
(75)
71 
91 
Pension and other postretirement benefits
(102)
(5)
(9)
Counterparty collateral, net
27 
(73)
(17)
Taum Sauk insurance recoveries, net of cost
(1)
54 
107 
Net cash provided by operating activities
1,878 
1,823 
1,967 
Cash Flows From Investing Activities:
 
 
 
Capital expenditures
(1,030)
(1,042)
(1,710)
Nuclear fuel expenditures
(62)
(68)
(72)
Purchases of securities - nuclear decommissioning trust fund
(220)
(271)
(383)
Sales of securities - nuclear decommissioning trust fund
199 
256 
380 
Proceeds from sales of properties
53 
27 
Other
12 
Net cash used in investing activities
(1,048)
(1,096)
(1,781)
Cash Flows From Financing Activities:
 
 
 
Dividends on common stock
(375)
(368)
(338)
Dividends paid to noncontrolling interest holders
(6)
(8)
(21)
Capital issuance costs
 
(15)
(65)
Short-term debt and credit facility repayments, net
(581)
(121)
(324)
Redemptions, repurchases, and maturities:
 
 
 
Long-term debt
(155)
(310)
(631)
Preferred stock
 
(52)
 
Issuances:
 
 
 
Common stock
65 
80 
634 
Long-term debt
 
 
1,021 
Repayments of generator advances received for construction
(73)
(39)
 
Generator advances received for construction
29 
68 
Net cash provided by (used in) financing activities
(1,120)
(804)
344 
Net change in cash and cash equivalents
(290)
(77)
530 
Cash and cash equivalents at beginning of year
545 
622 
92 
Cash and cash equivalents at end of year
255 
545 
622 
Cash Paid (Refunded) During the Year:
 
 
 
Interest net of capitalized
453 
494 
485 
Income taxes, net
(61)
(92)
Union Electric Company [Member]
 
 
 
Cash Flows From Operating Activities:
 
 
 
Net income (loss)
290 
369 
265 
Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
Gain on sales of properties
(3)
(5)
 
Loss from regulatory disallowance
89 
 
 
Net mark-to-market (gain) loss on derivatives
(1)
(29)
Depreciation and amortization
377 
355 
333 
Amortization of nuclear fuel
61 
54 
53 
Amortization of debt issuance costs and premium/discounts
10 
Deferred income taxes and investment tax credits, net
155 
292 
212 
Allowance for equity funds used during construction
(30)
(50)
(33)
Other
(6)
10 
 
Changes in assets and liabilities:
 
 
 
Receivables
66 
(122)
Materials and supplies
(7)
(2)
Accounts and wages payable
13 
(24)
18 
Taxes accrued
(6)
55 
Assets, other
79 
(101)
(34)
Liabilities, other
(30)
75 
69 
Pension and other postretirement benefits
(3)
(2)
Taum Sauk insurance recoveries, net of cost
(1)
54 
107 
Net cash provided by operating activities
1,056 
969 
975 
Cash Flows From Investing Activities:
 
 
 
Capital expenditures
(550)
(624)
(882)
Nuclear fuel expenditures
(62)
(68)
(72)
Purchases of securities - nuclear decommissioning trust fund
(220)
(271)
(383)
Sales of securities - nuclear decommissioning trust fund
199 
256 
380 
Other
 
Net cash used in investing activities
(627)
(700)
(957)
Cash Flows From Financing Activities:
 
 
 
Dividends on common stock
(403)
(235)
(175)
Dividends on preferred stock
(3)
(5)
(6)
Capital issuance costs
 
(4)
(14)
Short-term debt and credit facility repayments, net
 
 
(251)
Note payable - affiliates
 
 
(92)
Redemptions, repurchases, and maturities:
 
 
 
Long-term debt
(5)
(70)
(4)
Preferred stock
 
(33)
 
Issuances:
 
 
 
Long-term debt
 
 
349 
Generator advances received for construction
(19)
13 
Capital contribution from parent
 
 
436 
Net cash provided by (used in) financing activities
(430)
(334)
249 
Net change in cash and cash equivalents
(1)
(65)
267 
Cash and cash equivalents at beginning of year
202 
267 
 
Cash and cash equivalents at end of year
201 
202 
267 
Cash Paid (Refunded) During the Year:
 
 
 
Interest net of capitalized
210 
213 
212 
Income taxes, net
(106)
(208)
Ameren Illinois Company [Member]
 
 
 
Cash Flows From Operating Activities:
 
 
 
Net income (loss)
196 
252 
247 3 4
Income from discontinued operations, net of tax
 
(40)
(114)3 4
Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
Depreciation and amortization
206 
201 
195 3
Amortization of debt issuance costs and premium/discounts
10 
3
Deferred income taxes and investment tax credits, net
155 
210 
23 3
Other
(14)
(3)
(40)3
Changes in assets and liabilities:
 
 
 
Receivables
146 
(84)
187 3
Materials and supplies
(21)
81 3
Accounts and wages payable
(46)
(44)
(3)3
Taxes accrued
(12)
11 
(11)3
Assets, other
(3)
32 
27 3
Liabilities, other
(30)
33 
3
Pension and other postretirement benefits
(101)
(7)
3
Counterparty collateral, net
20 
(100)
92 3
Operating cash flows provided by discontinued operations
 
113 
141 3
Net cash provided by operating activities
504 
593 
845 3
Cash Flows From Investing Activities:
 
 
 
Capital expenditures
(351)
(281)
(352)3
Returns from (advances to) ATXI for construction
49 
(10)
(47)3
Proceeds from intercompany note receivable
 
45 
42 3
Other
3
Capital expenditures of discontinued operations
 
(6)
(91)3
Net cash used in investing activities
(296)
(247)
(442)3
Cash Flows From Financing Activities:
 
 
 
Dividends on common stock
(327)
(133)
(98)3
Dividends on preferred stock
(3)
(4)
(6)3
Capital issuance costs
 
(4)
(13)3
Short-term debt and credit facility repayments, net
 
 
(62)3
Redemptions, repurchases, and maturities:
 
 
 
Long-term debt
(150)
(40)
(250)3
Preferred stock
 
(19)
 
Issuances:
 
 
 
Repayments of generator advances received for construction
(53)
(39)
(2)3
Generator advances received for construction
16 
62 3
Net financing activities provided by (used in) discontinued operations
 
(107)
(50)3
Capital contribution from parent
19 
   
272 3
Net cash provided by (used in) financing activities
(509)
(330)
(147)3
Net change in cash and cash equivalents
(301)
16 
256 3
Cash and cash equivalents at beginning of year
322 
306 3
50 3
Cash and cash equivalents at end of year
21 
322 
306 3
Cash Paid (Refunded) During the Year:
 
 
 
Interest net of capitalized
137 
160 
167 3
Income taxes, net
(14)
(39)
129 3
Noncash investing activity - asset transfer from ATXI
 
29 3
Noncash financing activity - capital contribution from parent
 
 
Ameren Energy Generating Company [Member]
 
 
 
Cash Flows From Operating Activities:
 
 
 
Net income (loss)
45 
(36)
162 5
Adjustments to reconcile net income to net cash provided by operating activities:
 
 
 
Goodwill and other impairment charges
35 
170 
5
Gain on sales of properties
(12)
(5)
 
Net mark-to-market (gain) loss on derivatives
(8)
(27)5
Depreciation and amortization
98 
113 
106 5
Amortization of debt issuance costs and premium/discounts
5
Deferred income taxes and investment tax credits, net
64 
15 
64 5
Other
 
Changes in assets and liabilities:
 
 
 
Receivables
19 
38 
(13)5
Materials and supplies
42 
(12)5
Accounts and wages payable
(15)
(25)
(19)5
Taxes accrued
 
 
Assets, other
5
Liabilities, other
(30)
(24)
(26)5
Pension and other postretirement benefits
(2)
5
Net cash provided by operating activities
215 
304 
253 5
Cash Flows From Investing Activities:
 
 
 
Capital expenditures
(141)
(95)
(316)5
Proceeds from sales of properties
49 
18 
 
Money pool advances, net
(49)
48 
(73)5
Net cash used in investing activities
(141)
(29)
(389)5
Cash Flows From Financing Activities:
 
 
 
Dividends on common stock
 
 
(43)5
Dividends paid to noncontrolling interest holders
 
 
(11)5
Capital issuance costs
 
(4)
(7)5
Short-term debt and credit facility repayments, net
(100)
100 
 
Note payable - affiliates
 
(176)
31 5
Money pool borrowings, net
 
 
(80)5
Redemptions of long-term debt
 
(200)
 
Issuances:
 
 
 
Long-term debt
 
 
249 5
Capital contribution from parent
28 
 
Net cash provided by (used in) financing activities
(72)
(275)
139 5
Net change in cash and cash equivalents
 
5
Cash and cash equivalents at beginning of year
5
5
Cash and cash equivalents at end of year
5
Cash Paid (Refunded) During the Year:
 
 
 
Interest net of capitalized
60 
77 
58 5
Income taxes, net
(25)
74 5
Noncash financing activity - capital contribution from parent
 
$ 24 
 
Consolidated Statement Of Cash Flows (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Capitalized interest
$ 30 
$ 34 
$ 40 
Union Electric Company [Member]
 
 
 
Capitalized interest
25 
26 
23 
Ameren Illinois Company [Member]
 
 
 
Capitalized interest
Ameren Energy Generating Company [Member]
 
 
 
Capitalized interest
$ 3 
$ 6 
$ 12 
Consolidated Statement Of Stockholders' Equity (USD $)
In Millions, except Share data
Union Electric Company [Member]
Common Stock [Member]
Union Electric Company [Member]
Other Paid-In Capital [Member]
Union Electric Company [Member]
Preferred Stock Not Subject To Mandatory Redemption [Member]
Union Electric Company [Member]
Retained Earnings [Member]
Union Electric Company [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Union Electric Company [Member]
Ameren Illinois Company [Member]
Other Paid-In Capital [Member]
Ameren Illinois Company [Member]
Preferred Stock Not Subject To Mandatory Redemption [Member]
Ameren Illinois Company [Member]
Retained Earnings [Member]
Ameren Illinois Company [Member]
Deferred Retirement Benefit Costs [Member]
Ameren Illinois Company [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Ameren Illinois Company [Member]
Ameren Energy Generating Company [Member]
Other Paid-In Capital [Member]
Ameren Energy Generating Company [Member]
Retained Earnings [Member]
Ameren Energy Generating Company [Member]
Derivative Financial Instruments [Member]
Ameren Energy Generating Company [Member]
Deferred Retirement Benefit Costs [Member]
Ameren Energy Generating Company [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Ameren Energy Generating Company [Member]
Noncontrolling Interest [Member]
Ameren Energy Generating Company [Member]
Total Ameren Corporation Stockholders' Equity [Member]
Ameren Energy Generating Company [Member]
Common Stock [Member]
Other Paid-In Capital [Member]
Retained Earnings [Member]
Derivative Financial Instruments [Member]
Deferred Retirement Benefit Costs [Member]
Accumulated Other Comprehensive Income (Loss) [Member]
Noncontrolling Interest [Member]
Total Ameren Corporation Stockholders' Equity [Member]
Total
Beginning of year at Dec. 31, 2008
 
$ 1,119 
$ 113 
$ 1,794 
$ 25 
 
$ 1,951 1
$ 115 1
$ 566 1
$ 23 1
 
 
$ 620 2
$ 315 2
$ (6)2
$ (61)2
 
$ 16 2
 
 
$ 2 
$ 4,780 
$ 2,181 
$ 48 
$ (43)
 
$ 211 
 
 
Beginning of year (shares) at Dec. 31, 2008
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
212,300,000 
Net income (loss)
 
 
 
265 
 
265 
 
 
247 1
 
 
247 1 3
 
 
 
 
 
 
 
162 2
 
 
 
 
 
 
 
 
624 
Net income (loss) attributable to Ameren Company
 
 
 
 
 
 
 
 
 
 
 
 
 
160 2
 
 
 
 
 
160 2
 
 
612 
 
 
 
 
 
612 4
Shares issued (value)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
617 
 
 
 
 
 
 
 
Shares issued (number of shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
25,100,000 
Stock-based compensation activity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
15 
 
 
 
 
 
 
 
Capital contribution from parent
 
436 
 
 
 
436 
272 1
 
 
 
 
272 3
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common stock dividends
 
 
 
(175)
 
 
 
 
(98)1
 
 
 
 
(43)2
 
 
 
 
 
 
 
 
(338)
 
 
 
 
 
 
Preferred stock dividends
 
 
 
(6)
 
 
 
 
(6)1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Change in derivative financial instruments
 
 
 
 
(25)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(38)
 
 
 
 
 
Change in deferred retirement benefit costs
 
 
 
 
 
 
 
 
 
(4)1
 
(4)1
 
 
 
19 2
 
 
 
21 2
 
 
 
 
20 
 
 
 
22 
Change in accumulated other comprehensive income from discontinued operations1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income attributable to noncontrolling interest holder
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2
 
2
 
 
 
 
 
 
12 
 
12 
Dividends paid to noncontrolling interest holders
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(11)2
 
 
 
 
 
 
 
 
(21)
 
 
Other
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2
 
 
 
 
 
 
 
 
 
 
Total stockholders' equity
 
 
 
 
 
4,057 
 
 
 
 
 
3,072 1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Stockholders' equity, end of year at Dec. 31, 2009
 
 
 
 
 
4,057 
 
 
 
 
 
3,072 1
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
End of year at Dec. 31, 2009
511 
1,555 
113 
1,878 
 
 
2,223 1
115 1
709 1
25 1
25 1
 
620 2
432 2
(6)2
(42)2
(48)2
2
1,004 2
1,013 2
5,412 
2,455 
10 
(23)
(13)
204 
7,856 
8,060 
End of year (shares) at Dec. 31, 2009
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
237,400,000 
Net income (loss)
 
 
 
369 
 
369 
 
 
252 
 
 
252 
 
 
 
 
 
 
 
(36)
 
 
 
 
 
 
 
 
151 
Net income (loss) attributable to Ameren Company
 
 
 
 
 
 
 
 
 
 
 
 
 
(39)
 
 
 
 
 
(39)
 
 
139 
 
 
 
 
 
139 4
Shares issued (value)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
80 
 
 
 
 
 
 
 
Shares issued (number of shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3,000,000 
Stock-based compensation activity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
14 
 
 
 
 
 
 
 
Regulatory recovery of prior-period common stock issuance costs
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
14 
 
 
 
 
 
 
 
Capital contribution from parent
 
 
 
 
 
 
 
 
 
 
   
29 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Contribution of Ameren owned preferred stock without consideration
 
 
 
 
 
 
33 
(33)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Transfer of AERG to parent (Notes 1 and 16)
 
 
 
 
 
 
(310)
 
(281)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common stock dividends
 
 
 
(235)
 
 
 
 
(133)
 
 
 
 
 
 
 
 
 
 
 
 
 
(368)
 
 
 
 
 
 
Preferred stock dividends
 
 
 
(5)
 
 
 
 
(4)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Other
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
 
 
 
 
 
 
Change in derivative financial instruments
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(10)
 
 
 
 
 
Change in deferred retirement benefit costs
 
 
 
 
 
 
 
 
 
(4)
 
(4)
 
 
 
 
 
 
 
 
 
 
 
 
 
Change in accumulated other comprehensive income from discontinued operations
 
 
 
 
 
 
 
 
 
(1)
 
(1)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Net income attributable to noncontrolling interest holder
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
12 
 
12 
Dividends paid to noncontrolling interest holders
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(8)
 
 
Redemptions of preferred stock
 
 
(33)
 
 
 
 
(19)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(52)
 
 
Other
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(1)
 
 
 
 
 
 
 
 
(2)
 
 
Total stockholders' equity
 
 
 
 
 
4,153 
 
 
 
 
 
2,576 
 
 
 
 
 
 
 
998 
 
 
 
 
 
 
 
 
7,730 
Stockholders' equity, end of year at Dec. 31, 2010
 
 
 
 
 
4,153 
 
 
 
 
 
2,576 
 
 
 
 
 
 
 
998 
 
 
 
 
 
 
 
 
7,730 
End of year at Dec. 31, 2010
511 
1,555 
80 
2,007 
 
 
1,952 
62 
542 
20 
20 
 
649 
393 
(6)
(38)
(44)
11 
998 
1,009 
5,520 
2,225 
 
(17)
(17)
154 
7,730 
7,884 
End of year (shares) at Dec. 31, 2010
 
 
 
 
 
102,100,000 
 
 
 
 
 
25,500,000 
 
 
 
 
 
 
 
2,000 
 
 
 
 
 
 
 
 
240,400,000 
Net income (loss)
 
 
 
290 
 
290 
 
 
196 
 
 
196 
 
 
 
 
 
 
 
45 
 
 
 
 
 
 
 
 
526 
Net income (loss) attributable to Ameren Company
 
 
 
 
 
 
 
 
 
 
 
 
 
44 
 
 
 
 
 
44 
 
 
519 
 
 
 
 
 
519 4
Shares issued (value)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
65 
 
 
 
 
 
 
 
Shares issued (number of shares)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2,200,000 
Stock-based compensation activity
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
13 
 
 
 
 
 
 
 
Capital contribution from parent
 
 
 
 
 
 
13 
 
 
 
 
19 
 
 
 
 
 
 
28 
 
 
 
 
 
 
 
 
 
Common stock dividends
 
 
 
(403)
 
 
 
 
(327)
 
 
 
 
 
 
 
 
 
 
 
 
 
(375)
 
 
 
 
 
 
Preferred stock dividends
 
 
 
(3)
 
 
 
 
(3)
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Change in derivative financial instruments
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Change in deferred retirement benefit costs
 
 
 
 
 
 
 
 
 
(3)
 
(3)
 
 
 
(29)
 
 
 
(34)
 
 
 
 
(40)
 
 
 
(46)
Net income attributable to noncontrolling interest holder
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Dividends paid to noncontrolling interest holders
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(6)
 
 
Other
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
(5)
 
 
 
 
 
 
 
 
(6)
 
 
Total stockholders' equity
 
 
 
 
 
4,037 
 
 
 
 
 
2,452 
 
 
 
 
 
 
 
1,018 
 
 
 
 
 
 
 
 
7,919 
Stockholders' equity, end of year at Dec. 31, 2011
 
 
 
 
 
4,037 
 
 
 
 
 
2,452 
 
 
 
 
 
 
 
1,018 
 
 
 
 
 
 
 
 
7,919 
End of year at Dec. 31, 2011
$ 511 
$ 1,555 
$ 80 
$ 1,891 
 
 
$ 1,965 
$ 62 
$ 408 
$ 17 
$ 17 
 
$ 653 
$ 437 
$ (5)
$ (67)
$ (72)
$ 7 
$ 1,018 
$ 1,025 
$ 2 
$ 5,598 
$ 2,369 
$ 7 
$ (57)
$ (50)
$ 149 
$ 7,919 
$ 8,068 
End of year (shares) at Dec. 31, 2011
 
 
 
 
 
102,100,000 
 
 
 
 
 
25,500,000 
 
 
 
 
 
 
 
2,000 
 
 
 
 
 
 
 
 
242,600,000 
Consolidated Statement Of Stockholders' Equity (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2009
Consolidated Statement of Stockholders' Equity [Abstract]
 
Shares issued, issuance costs
$ 17 
Consolidated Statement Of Comprehensive Income (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net income
$ 526 
$ 151 
$ 624 
Unrealized net gain (loss) on derivative hedging instruments, net of income taxes (benefit)
(2)
103 
Reclassification adjustments for derivative (gains) losses included in net income, net of income taxes (benefit)
(8)
(112)
Reclassification adjustment due to implementation of FAC, net of income taxes
 
 
(29)
Pension and other postretirement activity, net of income taxes (benefit)
(46)
22 
Total comprehensive income, net of taxes
487 
145 
608 
Comprehensive income attributable to noncontrolling interests
10 
14 
Total comprehensive income (loss) attributable to Ameren Corporation, net of taxes
486 
135 
594 
Union Electric Company [Member]
 
 
 
Net income
290 
369 
265 
Unrealized net gain (loss) on derivative hedging instruments, net of income taxes (benefit)
 
 
17 
Reclassification adjustments for derivative (gains) losses included in net income, net of income taxes (benefit)
 
 
(13)
Reclassification adjustment due to implementation of FAC, net of income taxes
 
 
(29)
Total comprehensive income, net of taxes
290 
369 
240 
Ameren Illinois Company [Member]
 
 
 
Net income
196 
252 
247 1 2
Pension and other postretirement activity, net of income taxes (benefit)
(3)
(4)
(4)2
Other comprehensive income from discontinued operations
 
(1)
2
Total comprehensive income, net of taxes
193 
247 
249 2
Ameren Energy Generating Company [Member]
 
 
 
Net income
45 
(36)
162 3
Reclassification adjustments for derivative (gains) losses included in net income, net of income taxes (benefit)
 
 
Pension and other postretirement activity, net of income taxes (benefit)
(34)
21 3
Total comprehensive income, net of taxes
12 
(33)
183 3
Comprehensive income attributable to noncontrolling interests
(4)
3
Total comprehensive income (loss) attributable to Ameren Corporation, net of taxes
$ 16 
$ (35)
$ 179 3
Consolidated Statement Of Comprehensive Income (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Unrealized net gain (loss) on derivative hedging instruments, tax (benefit)
$ 1 
$ (1)
$ 78 
Reclassification adjustments for derivative (gain) included in net income, tax
(3)
82 
Reclassification adjustment due to implementation of FAC, taxes
 
 
18 
Pension and other postretirement activity, tax (benefit)
(32)
22 
Union Electric Company [Member]
 
 
 
Unrealized net gain (loss) on derivative hedging instruments, tax (benefit)
 
 
11 
Reclassification adjustments for derivative (gain) included in net income, tax
 
 
Reclassification adjustment due to implementation of FAC, taxes
 
 
18 
Ameren Illinois Company [Member]
 
 
 
Pension and other postretirement activity, tax (benefit)
(2)
(2)
(2)
Ameren Energy Generating Company [Member]
 
 
 
Pension and other postretirement activity, tax (benefit)
$ (24)
$ 5 
$ 12 
Summary Of Significant Accounting Policies

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

General

Ameren, headquartered in St. Louis, Missouri, is a public utility holding company under PUHCA 2005, administered by FERC. Ameren's primary assets are the common stock of its subsidiaries. Ameren's subsidiaries are separate, independent legal entities with separate businesses, assets, and liabilities. These subsidiaries operate, as the case may be, rate-regulated electric generation, transmission and distribution businesses, rate-regulated natural gas transmission and distribution businesses, and merchant electric generation businesses in Missouri and Illinois. Dividends on Ameren's common stock and the payment of other expenses by Ameren depend on distributions made to it by its subsidiaries. Ameren's principal subsidiaries are listed below. Also see the Glossary of Terms and Abbreviations at the front of this report.

 

Ÿ  

Union Electric Company, or Ameren Missouri, operates a rate-regulated electric generation, transmission and distribution business, and a rate-regulated natural gas transmission and distribution business in Missouri. Ameren Missouri was incorporated in Missouri in 1922 and is successor to a number of companies, the oldest of which was organized in 1881. It is the largest electric utility in the state of Missouri. It supplies electric and natural gas service to a 24,000-square-mile area in central and eastern Missouri. This area has an estimated population of 2.9 million and includes the Greater St. Louis area. Ameren Missouri supplies electric service to 1.2 million customers and natural gas service to 127,000 customers.

Ÿ  

Ameren Illinois Company, or Ameren Illinois, operates a rate-regulated electric and natural gas transmission and distribution business in Illinois. Ameren Illinois was created by the merger of CILCO and IP with and into CIPS. CIPS was incorporated in Illinois in 1923 and is successor to a number of companies, the oldest of which was organized in 1902. Ameren Illinois supplies electric and natural gas utility service to portions of central and southern Illinois having an estimated population of 3.1 million in an area of 40,000 square miles. Ameren Illinois supplies electric service to 1.2 million customers and natural gas service to 809,000 customers.

Ÿ  

AER consists of non-rate-regulated operations, including Genco, AERG, Marketing Company and Medina Valley. The Medina Valley energy center was sold in February 2012. Genco operates a merchant electric generation business in Illinois and holds an 80% ownership interest in EEI, which it consolidates for financial reporting purposes. Genco was incorporated in Illinois in March 2000. Genco's coal and natural gas electric generating facilities are expected to have capacity of 3,095 and 1,348 megawatts, respectively, at the time of the 2012 peak summer electrical demand.

Ameren has various other subsidiaries responsible for activities such as the provision of shared services.

On October 1, 2010, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. Upon consummation of the Ameren Illinois Merger, the separate legal existence of CILCO and IP ended. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren and the subsequent contribution by Ameren of the AERG stock to AER. The Ameren Illinois Merger and the distribution of AERG stock were accounted for as transactions between entities under common control. In accordance with authoritative accounting guidance, assets and liabilities transferred between entities under common control were accounted for at the historical cost basis of the common parent, Ameren, as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in Ameren Illinois included purchase accounting adjustments related to Ameren's acquisition of CILCORP in 2003. Ameren Illinois accounted for the AERG distribution as a spinoff. Ameren Illinois transferred AERG to Ameren based on AERG's carrying value. Ameren Illinois has segregated AERG's operating results and cash flows and presented them separately as discontinued operations in its consolidated statement of income and consolidated statement of cash flows, respectively, for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operations remain classified as continuing operations. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

Effective January 1, 2010, as part of an internal reorganization, AER transferred its 80% stock ownership interest in EEI to Genco through a capital contribution. The

transfer of EEI to Genco was accounted for as a transaction between entities under common control, whereby Genco accounted for the transfer at the historical carrying value of the parent (Ameren) as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in EEI included purchase accounting adjustments relating to Ameren's acquisition of an additional 20% ownership interest in EEI in 2004. This transfer required Genco's prior-period financial statements to be retrospectively combined for all periods presented. Consequently, Genco's prior-period consolidated financial statements reflect EEI as if it had been a subsidiary of Genco. Ameren and Genco consolidate EEI for financial reporting purposes.

 

The financial statements of Ameren, Ameren Illinois and Genco are prepared on a consolidated basis. Ameren Missouri has no subsidiaries, and therefore its financial statements were not prepared on a consolidated basis. All significant intercompany transactions have been eliminated. All tabular dollar amounts are in millions, unless otherwise indicated.

Our accounting policies conform to GAAP. Our financial statements reflect all adjustments (which include normal, recurring adjustments) that are necessary, in our opinion, for a fair presentation of our results. The preparation of financial statements in conformity with GAAP requires that Ameren management make certain estimates and assumptions. Such estimates and assumptions affect reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the dates of financial statements, and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

During the second quarter of 2011, Genco identified an error in the cash flow statement classification of a capital contribution from Ameren that affected Genco's year ended December 31, 2010. For the year ended December 31, 2010, Genco's previously reported cash flows provided by operating activities were $280 million, and cash flows used in financing activities were $251 million. As corrected herein, Genco's cash flows provided by operating activities were $304 million and cash flows used in financing activities were $275 million. This correction had no impact on Ameren's previously reported consolidated statement of cash flows.

Regulation

Certain Ameren subsidiaries are regulated by the MoPSC, the ICC, and FERC. In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs as assets pursuant to actions of rate regulators or based on the expectation they will be able to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts as liabilities pursuant to actions of rate regulators or based on the expectation that such amounts will be returned to customers in future rates. Regulatory assets and liabilities are amortized consistent with the period of expected regulatory treatment. See Note 2 – Rate and Regulatory Matters for additional information on regulatory assets and liabilities. In addition, other costs that Ameren Missouri and Ameren Illinois expect to recover from customers are recorded as construction work in progress and property and plant, net. See Note 3 – Property and Plant, Net.

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand and temporary investments purchased with an original maturity of three months or less.

Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollectible. The allowance is calculated by applying estimated loss factors to various classes of outstanding receivables, including unbilled revenue. The loss factors used to estimate uncollectible accounts are based upon both historical collections experience and management's best estimate of future collections success given the existing and anticipated future collections environment. Ameren Illinois has a rate mechanism that adjusts rates for bad debt expense above or below those being collected in rates.

 

Materials and Supplies

Materials and supplies are recorded at the lower of cost or market. Cost is determined using the average-cost method. Materials and supplies are capitalized as inventory when purchased and then expensed or capitalized as plant assets when installed, as appropriate. The following table presents a breakdown of materials and supplies for each of the Ameren Companies at December 31, 2011, and 2010:

 

 

Property and Plant

We capitalize the cost of additions to and betterments of units of property and plant. The cost includes labor, material, applicable taxes, and overhead. An allowance for funds used during construction, as discussed specifically below, is also capitalized as a cost of our rate-regulated assets. Interest incurred during construction is capitalized as a cost of merchant generation assets. Maintenance expenditures, including nuclear refueling and maintenance outages, are expensed as incurred. When units of depreciable property are retired, the original costs, less salvage values, are charged to accumulated depreciation. Asset removal costs incurred by our merchant generation operations that do not constitute legal obligations are expensed as incurred. Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Asset Retirement Obligations below and Note 3 – Property and Plant, Net, for additional information.

Depreciation

Depreciation is provided over the estimated lives of the various classes of depreciable property by applying composite rates on a straight-line basis to the cost basis of such property. The provision for depreciation for the Ameren Companies in 2011, 2010 and 2009 ranged from 3% to 4% of the average depreciable cost.

Allowance for Funds Used During Construction

In our rate-regulated operations, we capitalize the allowance for funds used during construction, or the cost of borrowed funds and the cost of equity funds (preferred and common stockholders' equity) applicable to rate-regulated construction expenditures, as is the utility industry accounting practice. Allowance for funds used during construction does not represent a current source of cash funds. This accounting practice offsets the effect on earnings of the cost of financing current construction, and it treats such financing costs in the same manner as construction charges for labor and materials.

Under accepted ratemaking practice, cash recovery of allowance for funds used during construction and other construction costs occurs when completed projects are placed in service and reflected in customer rates. The following table presents the annual allowance for funds used during construction rates that were utilized during 2011, 2010 and 2009:

 

          2011              2010              2009      

Ameren

     8% - 9         8% - 9         6% - 9   

Ameren Missouri

     8             8             6       

Ameren Illinois

     9             9             9       

Goodwill and Intangible Assets

Goodwill. Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. As of December 31, 2011, Ameren's and Ameren Illinois' goodwill related to Ameren's acquisition of IP in 2004 and Ameren's acquisition of CILCORP in 2003.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events or changes in circumstances indicate that the asset might be impaired. During the fourth quarter of 2011, Ameren and Ameren Illinois used a qualitative evaluation to assess the likelihood of a goodwill impairment based on authoritative accounting guidance issued by the FASB in 2011. That evaluation led Ameren and Ameren Illinois to believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values, resulting in no impairment in 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the goodwill impairment recorded in 2010.

Intangible Assets. Ameren, Ameren Missouri and Genco classify emission allowances and renewable energy credits as intangible assets. We evaluate intangible assets for impairment if events or changes in circumstances indicate that their carrying amount might be impaired. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the intangible asset impairments recorded in 2011 and 2010.

At December 31, 2011, Ameren's and Ameren Missouri's intangible assets included renewable energy credits obtained through wind and solar power purchase agreements. The book value of each of Ameren's and Ameren Missouri's renewable energy credits was $7 million and less than $1 million at December 31, 2011, and 2010, respectively.

In July 2011, the EPA issued the CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of preexisting SO2 and NOx allowances to the acid rain program and NOx budget trading program, respectively. In anticipation of the CSAPR announcement, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash, pretax impairment charge of $2 million and $1 million, respectively, which was reflected in "Goodwill, impairment and other charges" on their statements of income. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact to earnings. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until that court proceeding is finalized, the EPA is expected to continue to administer the CAIR and to use CAIR's allowance program for compliance. During 2010, Ameren and Genco each recognized an impairment charge of intangible assets to reduce the carrying value of SO2 emission allowances. The charge was reflected in "Goodwill, impairment and other charges" in their statements of income. See Note 15 – Commitments and Contingencies for additional information on emission allowances and the CSAPR. The book value of each of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was less than $1 million at December 31, 2011. The book value of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was $7 million, $2 million, and $3 million, at December 31, 2010, respectively.

Renewable energy credits and emission allowances are charged to purchased power expense and fuel expense, respectively, as they are used in operations. The following table presents amortization expense based on usage of renewable energy credits and emission allowances, net of gains from sales, for Ameren, Ameren Missouri, Ameren Illinois, and Genco during the years ended December 31, 2011, 2010, and 2009. The table below does not include the intangible asset impairment charges referenced above.

 

Impairment of Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value. In the period in which we determine an asset meets the held for sale criteria, we record an impairment charge to the extent the book value exceeds its fair value less cost to sell. See Note 17 – Goodwill, Impairment and Other Charges for information about Ameren's, Ameren Missouri's and Genco's impairments.

Investments

Ameren and Ameren Missouri evaluate for impairment the investments held in Ameren Missouri's nuclear decommissioning trust fund. Losses on assets in the trust fund could result in higher funding requirements for decommissioning costs, which Ameren Missouri believes would be recovered in electric rates paid by its customers. Accordingly, Ameren and Ameren Missouri recognize a regulatory asset on their balance sheets for losses on investments held in the nuclear decommissioning trust fund. See Note 9 – Nuclear Decommissioning Trust Fund Investments for additional information.

 

Environmental Costs

Liabilities for environmental costs are recorded on an undiscounted basis when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are expensed or deferred as a regulatory asset when it is expected that the costs will be recovered from customers in future rates. If environmental expenditures are related to facilities currently in use, such as pollution control equipment, the cost is capitalized and depreciated over the expected life of the asset.

Unamortized Debt Discount, Premium, and Expense

Discount, premium, and expense associated with long-term debt are amortized over the lives of the related issues.

Revenue

Operating Revenues

Ameren Missouri, Ameren Illinois and Genco record operating revenue for electric or natural gas service when it is delivered to customers. We accrue an estimate of electric and natural gas revenues for service rendered but unbilled at the end of each accounting period.

Trading Activities

We present the revenues and costs associated with certain energy derivative contracts designated as trading on a net basis in "Operating Revenues – Electric" and "Operating Revenues – Other."

Nuclear Fuel

Ameren Missouri's cost of nuclear fuel is capitalized and then amortized to fuel expense on a unit-of-production basis. Spent fuel disposal cost is based on net kilowatthours generated and sold, and that cost is charged to expense.

Purchased Gas, Power and Fuel Rate-adjustment Mechanisms

Ameren's utility subsidiaries have various rate-adjustment mechanisms in place that provide for the recovery of purchased natural gas and electric fuel and purchased power costs. See Note 2 – Rate and Regulatory Matters for the regulatory assets and liabilities recorded at December 31, 2011, and 2010, related to the rate-adjustment mechanisms discussed below.

In Ameren Missouri's and Ameren Illinois' retail natural gas utility jurisdictions, changes in natural gas costs are generally reflected in billings to their natural gas utility customers through PGA clauses. The difference between actual natural gas costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to natural gas utility customers in a subsequent period.

 

In Ameren Illinois' retail electric utility jurisdictions, changes in purchased power costs are generally reflected in billings to their electric utility customers through pass-through rate-adjustment clauses. The difference between actual purchased power costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to electric utility customers in a subsequent period.

Ameren Missouri has a FAC that allows an adjustment of electric rates three times per year for a pass-through to customers of 95% of changes in fuel, emission allowances and purchased power costs, net of off-system revenues, including MISO costs and revenues, greater or less than the amount set in base rates, subject to MoPSC prudency review. The differences between the cost of fuel incurred and the cost of fuel recovered from Ameren Missouri's customers are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to Ameren Missouri's electric utility customers in a subsequent period.

Accounting for MISO Transactions

MISO-related purchase and sale transactions are recorded by Ameren, Ameren Missouri and Ameren Illinois using settlement information provided by MISO. These purchase and sale transactions are accounted for on a net hourly position. We record net purchases in a single hour in "Operating Expenses – Purchased power" and net sales in a single hour in "Operating Revenues – Electric" in our statements of income. On occasion, prior-period transactions will be resettled outside the routine settlement process because of a change in MISO's tariff or a material interpretation thereof. In these cases, Ameren, Ameren Missouri and Ameren Illinois recognize expenses associated with resettlements once the resettlement is probable and the resettlement amount can be estimated.

Stock-based Compensation

Stock-based compensation cost is measured at the grant date based on the fair value of the award. Ameren recognizes as compensation expense the estimated fair value of stock-based compensation on a straight-line basis over the requisite service period. See Note 12 – Stock-based Compensation for additional information.

Excise Taxes

Excise taxes imposed on us are reflected on Ameren Missouri customer electric bills and on Ameren Missouri and Ameren Illinois customer natural gas bills. They are recorded gross in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" on the statement of income. Excise taxes reflected on Ameren Illinois electric customer bills are imposed on the consumer and are therefore not included in revenues and expenses. They are recorded as tax collections payable and included in "Taxes accrued" on the balance sheet. The following table presents excise taxes recorded in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" for the years ended 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren Missouri

   $     137       $     130       $     112   

Ameren Illinois

     57         59         56   

Ameren

   $ 194       $ 189       $ 168   

Income Taxes

Ameren uses an asset and liability approach for its financial accounting and reporting of income taxes, in

accordance with authoritative accounting guidance. Deferred tax assets and liabilities are recognized for transactions that are treated differently for financial reporting and income tax return purposes. These deferred tax assets and liabilities are based on statutory tax rates.

We recognize that regulators will probably reduce future revenues for deferred tax liabilities that were initially recorded at rates in excess of the current statutory rate. Therefore, reductions in the deferred tax liability, which were recorded because of decreases in the statutory rate, have been credited to a regulatory liability. A regulatory asset has been established to recognize the probable recovery in rates of future income taxes, resulting principally from the reversal of allowance for funds used during construction. This refers to equity and temporary differences related to property and plant acquired before 1976 that were unrecognized temporary differences prior to the adoption of the authoritative accounting guidance for income taxes.

Investment tax credits used on tax returns for prior years have been deferred for book purposes; the credits are being amortized over the useful lives of the related investment. Deferred income taxes were recorded on the temporary difference represented by the deferred investment tax credits and a corresponding regulatory liability. This recognizes the expected reduction in rate revenue for future lower income taxes associated with the amortization of the investment tax credits. See Note 13 – Income Taxes.

Ameren Missouri, Ameren Illinois and Genco are parties to a tax sharing agreement with Ameren that provides for the allocation of consolidated tax liabilities. The tax sharing agreement specifies that each party be allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. Any net benefit attributable to the parent is reallocated to other members. That allocation is treated as a contribution of capital to the party receiving the benefit.

Noncontrolling Interests

Ameren's noncontrolling interests comprised the 20% of EEI not owned by Ameren and the preferred stock not subject to mandatory redemption of Ameren's subsidiaries. These noncontrolling interests are classified as a component of equity separate from Ameren's equity in its consolidated balance sheet. Genco's noncontrolling interest comprised the 20% of EEI not owned by Genco. This noncontrolling interest is classified as a component of equity separate from Genco's equity in its consolidated balance sheet.

Earnings per Share

There were no material differences between Ameren's basic and diluted earnings per share amounts in 2011, 2010, and 2009. The number of stock options, restricted stock shares, and performance share units outstanding was immaterial. There were no assumed stock option conversions in 2009 and 2010, as the remaining stock options were not dilutive. All of Ameren's stock options expired in February 2010.

Accounting Changes and Other Matters

The following is a summary of recently adopted authoritative accounting guidance as well as guidance issued but not yet adopted that could impact the Ameren Companies.

Disclosures about an Employer's Participation in a Multiemployer Plan

In September 2011, FASB amended its guidance to require employers to provide additional disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans. This guidance was applicable to Ameren Missouri, Ameren Illinois, and Genco because they participate in their parent's (Ameren's) benefit plans. Ameren Missouri, Ameren Illinois, and Genco adopted this guidance as of December 31, 2011. See Note 11 – Retirement Benefits for the required additional disclosures made by Ameren Missouri, Ameren Illinois and Genco, including the amount of their contributions to Ameren's benefit plans.

Testing of Goodwill for Impairment

In September 2011, FASB amended its guidance on testing of goodwill impairment. The amended guidance provided companies the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a two-step goodwill impairment test. As permitted, Ameren and Ameren Illinois early adopted the amended guidance for the annual goodwill impairment test performed as of October 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Disclosures about Fair Value Measurements

See Note 8 – Fair Value Measurements for adopted guidance on fair value measurements issued in January 2010, which became effective in its entirety for the Ameren Companies as of January 1, 2011.

In May 2011, FASB issued additional authoritative guidance regarding fair value measurements. The guidance amends the disclosure requirements for fair value measurements in order to align the principles for fair value measurements and the related disclosure requirements under GAAP and International Financial Reporting Standards. The amendments will not affect the Ameren Companies' results of operations, financial positions, or liquidity, as this guidance only requires additional disclosures. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012 with retrospective application required.

Presentation of Comprehensive Income

In June 2011, FASB amended its guidance on the presentation of comprehensive income in financial statements. The amended guidance will not affect the Ameren Companies' results of operations, financial positions, or liquidity. The amended guidance changes the presentation of comprehensive income in the financial statements. It requires entities to report components of comprehensive income either in a continuous statement of comprehensive income or in two separate but consecutive statements. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012. In December 2011, the FASB amended the guidance to postpone a requirement to present reclassification adjustments by income component until further guidance is issued.

Asset Retirement Obligations

Authoritative accounting guidance requires us to record the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets in the period in which the liabilities are incurred and to capitalize a corresponding amount as part of the book value of the related long-lived asset. In subsequent periods, we are required to make adjustments to AROs based on changes in the estimated fair values of the obligations. Corresponding increases in asset book values are depreciated over the remaining useful life of the related asset. Uncertainties as to the probability, timing, or amount of cash flows associated with AROs affect our estimates of fair value. Ameren, Ameren Missouri and Genco have recorded AROs for retirement costs associated with Ameren Missouri's Callaway energy center decommissioning costs, asbestos removal, ash ponds, and river structures. In addition, Ameren, Ameren Missouri and Ameren Illinois have recorded AROs for the disposal of certain transformers.

Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Note 2 – Rate and Regulatory Matters.

 

The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the years 2011 and 2010:

 

      Ameren Missouri(a)     Ameren Illinois(b)     Genco      AERG     Ameren(a)  

Balance at December 31, 2009

   $     331      $      5      $     65       $     33      $     434   

Liabilities incurred

     5        (c     3         -        8   

Liabilities settled

     (4     (c     (c      (c     (4

Accretion in 2010(d)

     19        1        4         2        26   

Change in estimates(e)

     12        (3     2         (c     11   

Balance at December 31, 2010

   $ 363      $ 3      $ 74       $ 35      $ 475   

Liabilities incurred

     -        -        (c      -        (c

Liabilities settled

     (1     (c     (2      (c     (3

Accretion in 2011(d)

     20        (c     5         2        27   

Change in estimates(f)

     (54     (c     (6      (6     (66

Balance at December 31, 2011

   $ 328      $ 3      $ 71 (g)     $ 31      $ 433 (g) 

 

Genco Asset Sale

In June 2010, Genco completed a sale of 25% of its Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $18 million and recognized a $5 million pretax gain from the sale.

In June 2011, Genco completed the sale of its remaining interest in the Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $45 million and recognized an $8 million pretax gain from the sale. Effective with the sale, the power purchase agreements between Marketing Company and the city of Columbia were terminated. Also in 2011, Genco sold additional property and assets for cash proceeds of $4 million, which resulted in pretax gains of $4 million.

Medina Valley Sale in 2012

In February 2012, Ameren completed the asset sale of its Medina Valley energy center's net property and plant for cash proceeds of $16 million and an additional $1 million payment at the two-year anniversary date of the sale if there are no violations of representations and warranties contained in the sale agreement.

Employee Separation and Other Charges

During the fourth quarter of 2011, as part of efforts to reduce operations and maintenance expenses, Ameren Missouri and Ameren Services extended voluntary separation offers consistent with Ameren's standard management separation program to eligible management and labor union-represented employees. Approximately 340 employees of Ameren Missouri and Ameren Services accepted the offers and left their employment by December 31, 2011. Ameren and Ameren Missouri recorded a pretax charge to earnings of $28 million and $27 million, respectively, for the severance costs related to these offers. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income for the year ended December 31, 2011. Substantially all of the severance costs will be paid in the first quarter of 2012 and were recorded in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. The severance costs related to participating Ameren Services employees were allocated to affiliates consistent with the terms of its support services agreement, which is described in Note 14 – Related Party Transactions.

Also during 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers at the end of 2011 resulted in the elimination of 90 positions. Ameren and Genco each recorded a $4 million pretax charge for related severance and relocation costs to "Goodwill, impairment and other charges" in their statements of income for the year ended December 31, 2011. The severance costs will be substantially paid during the first quarter of 2012 and were accrued in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

 

In 2010, Ameren's Merchant Generation segment initiated an involuntary separation program to reduce positions under the terms and benefits consistent with Ameren's standard management separation program. Ameren and Genco recorded a pretax charge to earnings of $4 million in 2010 for the severance costs related to this program. These charges were recorded in "Other operations and maintenance expense" on Ameren's and Genco's consolidated statement of income.

In 2009, Ameren initiated voluntary and involuntary separation programs under terms and benefits consistent with Ameren's standard management severance program. Ameren recorded a pretax charge to earnings of $17 million (Ameren Missouri – $8 million, Ameren Illinois – $3 million, Genco – $5 million) for the severance costs related to both the voluntary and involuntary separation programs. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income. The number of positions eliminated as a result of these separation programs was approximately 300. In its May 2010 electric rate order, the MoPSC allowed Ameren Missouri to recover the costs of this severance program from its customers. Therefore, in 2010 Ameren Missouri reclassified the 2009 "Other operations and maintenance expense" to "Regulatory assets." In addition to these programs, Genco recorded a $4 million pretax charge to 2009 earnings in connection with the retirement of two generating units at its Meredosia energy center and for related obsolete inventory.

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

General

Ameren, headquartered in St. Louis, Missouri, is a public utility holding company under PUHCA 2005, administered by FERC. Ameren's primary assets are the common stock of its subsidiaries. Ameren's subsidiaries are separate, independent legal entities with separate businesses, assets, and liabilities. These subsidiaries operate, as the case may be, rate-regulated electric generation, transmission and distribution businesses, rate-regulated natural gas transmission and distribution businesses, and merchant electric generation businesses in Missouri and Illinois. Dividends on Ameren's common stock and the payment of other expenses by Ameren depend on distributions made to it by its subsidiaries. Ameren's principal subsidiaries are listed below. Also see the Glossary of Terms and Abbreviations at the front of this report.

 

Ÿ  

Union Electric Company, or Ameren Missouri, operates a rate-regulated electric generation, transmission and distribution business, and a rate-regulated natural gas transmission and distribution business in Missouri. Ameren Missouri was incorporated in Missouri in 1922 and is successor to a number of companies, the oldest of which was organized in 1881. It is the largest electric utility in the state of Missouri. It supplies electric and natural gas service to a 24,000-square-mile area in central and eastern Missouri. This area has an estimated population of 2.9 million and includes the Greater St. Louis area. Ameren Missouri supplies electric service to 1.2 million customers and natural gas service to 127,000 customers.

Ÿ  

Ameren Illinois Company, or Ameren Illinois, operates a rate-regulated electric and natural gas transmission and distribution business in Illinois. Ameren Illinois was created by the merger of CILCO and IP with and into CIPS. CIPS was incorporated in Illinois in 1923 and is successor to a number of companies, the oldest of which was organized in 1902. Ameren Illinois supplies electric and natural gas utility service to portions of central and southern Illinois having an estimated population of 3.1 million in an area of 40,000 square miles. Ameren Illinois supplies electric service to 1.2 million customers and natural gas service to 809,000 customers.

Ÿ  

AER consists of non-rate-regulated operations, including Genco, AERG, Marketing Company and Medina Valley. The Medina Valley energy center was sold in February 2012. Genco operates a merchant electric generation business in Illinois and holds an 80% ownership interest in EEI, which it consolidates for financial reporting purposes. Genco was incorporated in Illinois in March 2000. Genco's coal and natural gas electric generating facilities are expected to have capacity of 3,095 and 1,348 megawatts, respectively, at the time of the 2012 peak summer electrical demand.

Ameren has various other subsidiaries responsible for activities such as the provision of shared services.

On October 1, 2010, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. Upon consummation of the Ameren Illinois Merger, the separate legal existence of CILCO and IP ended. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren and the subsequent contribution by Ameren of the AERG stock to AER. The Ameren Illinois Merger and the distribution of AERG stock were accounted for as transactions between entities under common control. In accordance with authoritative accounting guidance, assets and liabilities transferred between entities under common control were accounted for at the historical cost basis of the common parent, Ameren, as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in Ameren Illinois included purchase accounting adjustments related to Ameren's acquisition of CILCORP in 2003. Ameren Illinois accounted for the AERG distribution as a spinoff. Ameren Illinois transferred AERG to Ameren based on AERG's carrying value. Ameren Illinois has segregated AERG's operating results and cash flows and presented them separately as discontinued operations in its consolidated statement of income and consolidated statement of cash flows, respectively, for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operations remain classified as continuing operations. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

Effective January 1, 2010, as part of an internal reorganization, AER transferred its 80% stock ownership interest in EEI to Genco through a capital contribution. The

transfer of EEI to Genco was accounted for as a transaction between entities under common control, whereby Genco accounted for the transfer at the historical carrying value of the parent (Ameren) as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in EEI included purchase accounting adjustments relating to Ameren's acquisition of an additional 20% ownership interest in EEI in 2004. This transfer required Genco's prior-period financial statements to be retrospectively combined for all periods presented. Consequently, Genco's prior-period consolidated financial statements reflect EEI as if it had been a subsidiary of Genco. Ameren and Genco consolidate EEI for financial reporting purposes.

 

The financial statements of Ameren, Ameren Illinois and Genco are prepared on a consolidated basis. Ameren Missouri has no subsidiaries, and therefore its financial statements were not prepared on a consolidated basis. All significant intercompany transactions have been eliminated. All tabular dollar amounts are in millions, unless otherwise indicated.

Our accounting policies conform to GAAP. Our financial statements reflect all adjustments (which include normal, recurring adjustments) that are necessary, in our opinion, for a fair presentation of our results. The preparation of financial statements in conformity with GAAP requires that Ameren management make certain estimates and assumptions. Such estimates and assumptions affect reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the dates of financial statements, and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

During the second quarter of 2011, Genco identified an error in the cash flow statement classification of a capital contribution from Ameren that affected Genco's year ended December 31, 2010. For the year ended December 31, 2010, Genco's previously reported cash flows provided by operating activities were $280 million, and cash flows used in financing activities were $251 million. As corrected herein, Genco's cash flows provided by operating activities were $304 million and cash flows used in financing activities were $275 million. This correction had no impact on Ameren's previously reported consolidated statement of cash flows.

Regulation

Certain Ameren subsidiaries are regulated by the MoPSC, the ICC, and FERC. In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs as assets pursuant to actions of rate regulators or based on the expectation they will be able to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts as liabilities pursuant to actions of rate regulators or based on the expectation that such amounts will be returned to customers in future rates. Regulatory assets and liabilities are amortized consistent with the period of expected regulatory treatment. See Note 2 – Rate and Regulatory Matters for additional information on regulatory assets and liabilities. In addition, other costs that Ameren Missouri and Ameren Illinois expect to recover from customers are recorded as construction work in progress and property and plant, net. See Note 3 – Property and Plant, Net.

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand and temporary investments purchased with an original maturity of three months or less.

Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollectible. The allowance is calculated by applying estimated loss factors to various classes of outstanding receivables, including unbilled revenue. The loss factors used to estimate uncollectible accounts are based upon both historical collections experience and management's best estimate of future collections success given the existing and anticipated future collections environment. Ameren Illinois has a rate mechanism that adjusts rates for bad debt expense above or below those being collected in rates.

 

Materials and Supplies

Materials and supplies are recorded at the lower of cost or market. Cost is determined using the average-cost method. Materials and supplies are capitalized as inventory when purchased and then expensed or capitalized as plant assets when installed, as appropriate. The following table presents a breakdown of materials and supplies for each of the Ameren Companies at December 31, 2011, and 2010:

 

        Ameren(a)        Ameren Missouri        Ameren Illinois        Genco  

2011:

                   

Fuel(b)

     $         251         $         150         $ -         $ 76   

Gas stored underground

       171           22           149           -   

Other materials and supplies

       290           176           50           46   
       $ 712         $ 348         $         199         $         122   

2010:

                   

Fuel(b)

     $ 255         $ 152         $ -         $ 81   

Gas stored underground

       175           22           152           -   

Other materials and supplies

       277           167           46           49   
       $ 707         $ 341         $ 198         $ 130   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Consists of coal, oil, paint, propane, and tire chips.

 

Property and Plant

We capitalize the cost of additions to and betterments of units of property and plant. The cost includes labor, material, applicable taxes, and overhead. An allowance for funds used during construction, as discussed specifically below, is also capitalized as a cost of our rate-regulated assets. Interest incurred during construction is capitalized as a cost of merchant generation assets. Maintenance expenditures, including nuclear refueling and maintenance outages, are expensed as incurred. When units of depreciable property are retired, the original costs, less salvage values, are charged to accumulated depreciation. Asset removal costs incurred by our merchant generation operations that do not constitute legal obligations are expensed as incurred. Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Asset Retirement Obligations below and Note 3 – Property and Plant, Net, for additional information.

Depreciation

Depreciation is provided over the estimated lives of the various classes of depreciable property by applying composite rates on a straight-line basis to the cost basis of such property. The provision for depreciation for the Ameren Companies in 2011, 2010 and 2009 ranged from 3% to 4% of the average depreciable cost.

Allowance for Funds Used During Construction

In our rate-regulated operations, we capitalize the allowance for funds used during construction, or the cost of borrowed funds and the cost of equity funds (preferred and common stockholders' equity) applicable to rate-regulated construction expenditures, as is the utility industry accounting practice. Allowance for funds used during construction does not represent a current source of cash funds. This accounting practice offsets the effect on earnings of the cost of financing current construction, and it treats such financing costs in the same manner as construction charges for labor and materials.

Under accepted ratemaking practice, cash recovery of allowance for funds used during construction and other construction costs occurs when completed projects are placed in service and reflected in customer rates. The following table presents the annual allowance for funds used during construction rates that were utilized during 2011, 2010 and 2009:

 

          2011              2010              2009      

Ameren

     8% - 9%          8% - 9%          6% - 9%    

Ameren Missouri

     8             8             6       

Ameren Illinois

     9             9             9       

Goodwill and Intangible Assets

Goodwill. Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. As of December 31, 2011, Ameren's and Ameren Illinois' goodwill related to Ameren's acquisition of IP in 2004 and Ameren's acquisition of CILCORP in 2003.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events or changes in circumstances indicate that the asset might be impaired. During the fourth quarter of 2011, Ameren and Ameren Illinois used a qualitative evaluation to assess the likelihood of a goodwill impairment based on authoritative accounting guidance issued by the FASB in 2011. That evaluation led Ameren and Ameren Illinois to believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values, resulting in no impairment in 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the goodwill impairment recorded in 2010.

Intangible Assets. Ameren, Ameren Missouri and Genco classify emission allowances and renewable energy credits as intangible assets. We evaluate intangible assets for impairment if events or changes in circumstances indicate that their carrying amount might be impaired. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the intangible asset impairments recorded in 2011 and 2010.

At December 31, 2011, Ameren's and Ameren Missouri's intangible assets included renewable energy credits obtained through wind and solar power purchase agreements. The book value of each of Ameren's and Ameren Missouri's renewable energy credits was $7 million and less than $1 million at December 31, 2011, and 2010, respectively.

In July 2011, the EPA issued the CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of preexisting SO2 and NOx allowances to the acid rain program and NOx budget trading program, respectively. In anticipation of the CSAPR announcement, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash, pretax impairment charge of $2 million and $1 million, respectively, which was reflected in "Goodwill, impairment and other charges" on their statements of income. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact to earnings. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until that court proceeding is finalized, the EPA is expected to continue to administer the CAIR and to use CAIR's allowance program for compliance. During 2010, Ameren and Genco each recognized an impairment charge of intangible assets to reduce the carrying value of SO2 emission allowances. The charge was reflected in "Goodwill, impairment and other charges" in their statements of income. See Note 15 – Commitments and Contingencies for additional information on emission allowances and the CSAPR. The book value of each of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was less than $1 million at December 31, 2011. The book value of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was $7 million, $2 million, and $3 million, at December 31, 2010, respectively.

Renewable energy credits and emission allowances are charged to purchased power expense and fuel expense, respectively, as they are used in operations. The following table presents amortization expense based on usage of renewable energy credits and emission allowances, net of gains from sales, for Ameren, Ameren Missouri, Ameren Illinois, and Genco during the years ended December 31, 2011, 2010, and 2009. The table below does not include the intangible asset impairment charges referenced above.

 

        2011      2010        2009  

Ameren Missouri

     $ (a    $ 6         $ 2   

Ameren Illinois

           3         7           9   

Genco(b)

       2             18               24   

Other(b)(c)

       1         4           5   

Ameren(b)

     $ 6       $ 35         $ 40   

 

(a) Less than $1 million.
(b) Includes allowances consumed that were recorded through purchase accounting.
(c) Consists of renewable energy credit expense for Marketing Company and emission allowances expense for AERG.

Impairment of Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value. In the period in which we determine an asset meets the held for sale criteria, we record an impairment charge to the extent the book value exceeds its fair value less cost to sell. See Note 17 – Goodwill, Impairment and Other Charges for information about Ameren's, Ameren Missouri's and Genco's impairments.

Investments

Ameren and Ameren Missouri evaluate for impairment the investments held in Ameren Missouri's nuclear decommissioning trust fund. Losses on assets in the trust fund could result in higher funding requirements for decommissioning costs, which Ameren Missouri believes would be recovered in electric rates paid by its customers. Accordingly, Ameren and Ameren Missouri recognize a regulatory asset on their balance sheets for losses on investments held in the nuclear decommissioning trust fund. See Note 9 – Nuclear Decommissioning Trust Fund Investments for additional information.

 

Environmental Costs

Liabilities for environmental costs are recorded on an undiscounted basis when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are expensed or deferred as a regulatory asset when it is expected that the costs will be recovered from customers in future rates. If environmental expenditures are related to facilities currently in use, such as pollution control equipment, the cost is capitalized and depreciated over the expected life of the asset.

Unamortized Debt Discount, Premium, and Expense

Discount, premium, and expense associated with long-term debt are amortized over the lives of the related issues.

Revenue

Operating Revenues

Ameren Missouri, Ameren Illinois and Genco record operating revenue for electric or natural gas service when it is delivered to customers. We accrue an estimate of electric and natural gas revenues for service rendered but unbilled at the end of each accounting period.

Trading Activities

We present the revenues and costs associated with certain energy derivative contracts designated as trading on a net basis in "Operating Revenues – Electric" and "Operating Revenues – Other."

Nuclear Fuel

Ameren Missouri's cost of nuclear fuel is capitalized and then amortized to fuel expense on a unit-of-production basis. Spent fuel disposal cost is based on net kilowatthours generated and sold, and that cost is charged to expense.

Purchased Gas, Power and Fuel Rate-adjustment Mechanisms

Ameren's utility subsidiaries have various rate-adjustment mechanisms in place that provide for the recovery of purchased natural gas and electric fuel and purchased power costs. See Note 2 – Rate and Regulatory Matters for the regulatory assets and liabilities recorded at December 31, 2011, and 2010, related to the rate-adjustment mechanisms discussed below.

In Ameren Missouri's and Ameren Illinois' retail natural gas utility jurisdictions, changes in natural gas costs are generally reflected in billings to their natural gas utility customers through PGA clauses. The difference between actual natural gas costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to natural gas utility customers in a subsequent period.

 

In Ameren Illinois' retail electric utility jurisdictions, changes in purchased power costs are generally reflected in billings to their electric utility customers through pass-through rate-adjustment clauses. The difference between actual purchased power costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to electric utility customers in a subsequent period.

Ameren Missouri has a FAC that allows an adjustment of electric rates three times per year for a pass-through to customers of 95% of changes in fuel, emission allowances and purchased power costs, net of off-system revenues, including MISO costs and revenues, greater or less than the amount set in base rates, subject to MoPSC prudency review. The differences between the cost of fuel incurred and the cost of fuel recovered from Ameren Missouri's customers are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to Ameren Missouri's electric utility customers in a subsequent period.

Accounting for MISO Transactions

MISO-related purchase and sale transactions are recorded by Ameren, Ameren Missouri and Ameren Illinois using settlement information provided by MISO. These purchase and sale transactions are accounted for on a net hourly position. We record net purchases in a single hour in "Operating Expenses – Purchased power" and net sales in a single hour in "Operating Revenues – Electric" in our statements of income. On occasion, prior-period transactions will be resettled outside the routine settlement process because of a change in MISO's tariff or a material interpretation thereof. In these cases, Ameren, Ameren Missouri and Ameren Illinois recognize expenses associated with resettlements once the resettlement is probable and the resettlement amount can be estimated.

Stock-based Compensation

Stock-based compensation cost is measured at the grant date based on the fair value of the award. Ameren recognizes as compensation expense the estimated fair value of stock-based compensation on a straight-line basis over the requisite service period. See Note 12 – Stock-based Compensation for additional information.

Excise Taxes

Excise taxes imposed on us are reflected on Ameren Missouri customer electric bills and on Ameren Missouri and Ameren Illinois customer natural gas bills. They are recorded gross in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" on the statement of income. Excise taxes reflected on Ameren Illinois electric customer bills are imposed on the consumer and are therefore not included in revenues and expenses. They are recorded as tax collections payable and included in "Taxes accrued" on the balance sheet. The following table presents excise taxes recorded in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" for the years ended 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren Missouri

   $     137       $     130       $     112   

Ameren Illinois

     57         59         56   

Ameren

   $ 194       $ 189       $ 168   

Income Taxes

Ameren uses an asset and liability approach for its financial accounting and reporting of income taxes, in

accordance with authoritative accounting guidance. Deferred tax assets and liabilities are recognized for transactions that are treated differently for financial reporting and income tax return purposes. These deferred tax assets and liabilities are based on statutory tax rates.

We recognize that regulators will probably reduce future revenues for deferred tax liabilities that were initially recorded at rates in excess of the current statutory rate. Therefore, reductions in the deferred tax liability, which were recorded because of decreases in the statutory rate, have been credited to a regulatory liability. A regulatory asset has been established to recognize the probable recovery in rates of future income taxes, resulting principally from the reversal of allowance for funds used during construction. This refers to equity and temporary differences related to property and plant acquired before 1976 that were unrecognized temporary differences prior to the adoption of the authoritative accounting guidance for income taxes.

Investment tax credits used on tax returns for prior years have been deferred for book purposes; the credits are being amortized over the useful lives of the related investment. Deferred income taxes were recorded on the temporary difference represented by the deferred investment tax credits and a corresponding regulatory liability. This recognizes the expected reduction in rate revenue for future lower income taxes associated with the amortization of the investment tax credits. See Note 13 – Income Taxes.

Ameren Missouri, Ameren Illinois and Genco are parties to a tax sharing agreement with Ameren that provides for the allocation of consolidated tax liabilities. The tax sharing agreement specifies that each party be allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. Any net benefit attributable to the parent is reallocated to other members. That allocation is treated as a contribution of capital to the party receiving the benefit.

Noncontrolling Interests

Ameren's noncontrolling interests comprised the 20% of EEI not owned by Ameren and the preferred stock not subject to mandatory redemption of Ameren's subsidiaries. These noncontrolling interests are classified as a component of equity separate from Ameren's equity in its consolidated balance sheet. Genco's noncontrolling interest comprised the 20% of EEI not owned by Genco. This noncontrolling interest is classified as a component of equity separate from Genco's equity in its consolidated balance sheet.

Earnings per Share

There were no material differences between Ameren's basic and diluted earnings per share amounts in 2011, 2010, and 2009. The number of stock options, restricted stock shares, and performance share units outstanding was immaterial. There were no assumed stock option conversions in 2009 and 2010, as the remaining stock options were not dilutive. All of Ameren's stock options expired in February 2010.

Accounting Changes and Other Matters

The following is a summary of recently adopted authoritative accounting guidance as well as guidance issued but not yet adopted that could impact the Ameren Companies.

Disclosures about an Employer's Participation in a Multiemployer Plan

In September 2011, FASB amended its guidance to require employers to provide additional disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans. This guidance was applicable to Ameren Missouri, Ameren Illinois, and Genco because they participate in their parent's (Ameren's) benefit plans. Ameren Missouri, Ameren Illinois, and Genco adopted this guidance as of December 31, 2011. See Note 11 – Retirement Benefits for the required additional disclosures made by Ameren Missouri, Ameren Illinois and Genco, including the amount of their contributions to Ameren's benefit plans.

Testing of Goodwill for Impairment

In September 2011, FASB amended its guidance on testing of goodwill impairment. The amended guidance provided companies the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a two-step goodwill impairment test. As permitted, Ameren and Ameren Illinois early adopted the amended guidance for the annual goodwill impairment test performed as of October 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Disclosures about Fair Value Measurements

See Note 8 – Fair Value Measurements for adopted guidance on fair value measurements issued in January 2010, which became effective in its entirety for the Ameren Companies as of January 1, 2011.

In May 2011, FASB issued additional authoritative guidance regarding fair value measurements. The guidance amends the disclosure requirements for fair value measurements in order to align the principles for fair value measurements and the related disclosure requirements under GAAP and International Financial Reporting Standards. The amendments will not affect the Ameren Companies' results of operations, financial positions, or liquidity, as this guidance only requires additional disclosures. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012 with retrospective application required.

Presentation of Comprehensive Income

In June 2011, FASB amended its guidance on the presentation of comprehensive income in financial statements. The amended guidance will not affect the Ameren Companies' results of operations, financial positions, or liquidity. The amended guidance changes the presentation of comprehensive income in the financial statements. It requires entities to report components of comprehensive income either in a continuous statement of comprehensive income or in two separate but consecutive statements. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012. In December 2011, the FASB amended the guidance to postpone a requirement to present reclassification adjustments by income component until further guidance is issued.

Asset Retirement Obligations

Authoritative accounting guidance requires us to record the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets in the period in which the liabilities are incurred and to capitalize a corresponding amount as part of the book value of the related long-lived asset. In subsequent periods, we are required to make adjustments to AROs based on changes in the estimated fair values of the obligations. Corresponding increases in asset book values are depreciated over the remaining useful life of the related asset. Uncertainties as to the probability, timing, or amount of cash flows associated with AROs affect our estimates of fair value. Ameren, Ameren Missouri and Genco have recorded AROs for retirement costs associated with Ameren Missouri's Callaway energy center decommissioning costs, asbestos removal, ash ponds, and river structures. In addition, Ameren, Ameren Missouri and Ameren Illinois have recorded AROs for the disposal of certain transformers.

Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Note 2 – Rate and Regulatory Matters.

 

The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the years 2011 and 2010:

 

      Ameren Missouri(a)     Ameren Illinois(b)     Genco      AERG     Ameren(a)  

Balance at December 31, 2009

   $     331      $      5      $     65       $     33      $     434   

Liabilities incurred

     5        (c     3         -        8   

Liabilities settled

     (4     (c     (c      (c     (4

Accretion in 2010(d)

     19        1        4         2        26   

Change in estimates(e)

     12        (3     2         (c     11   

Balance at December 31, 2010

   $ 363      $ 3      $ 74       $ 35      $ 475   

Liabilities incurred

     -        -        (c      -        (c

Liabilities settled

     (1     (c     (2      (c     (3

Accretion in 2011(d)

     20        (c     5         2        27   

Change in estimates(f)

     (54     (c     (6      (6     (66

Balance at December 31, 2011

   $ 328      $ 3      $ 71 (g)     $ 31      $ 433 (g) 

 

(a) The nuclear decommissioning trust fund assets of $357 million and $337 million as of December 31, 2011, and 2010, respectively, were restricted for decommissioning of the Callaway energy center.
(b) Balance included in "Other deferred credits and liabilities" on the balance sheet.
(c) Less than $1 million.
(d) Accretion expense was recorded as an increase to regulatory assets at Ameren Missouri and Ameren Illinois.
(e) Ameren Missouri and Genco changed their estimates for asbestos removal. Additionally, Genco changed the estimates related to retirement costs for its coal combustion byproduct storage areas.
(f) Ameren Missouri changed estimates related to its Callaway energy center decommissioning costs because of a cost study performed in 2011 and a decline in the cost escalation factor assumptions. Additionally, Ameren Missouri, Genco and AERG changed estimates related to retirement costs for asbestos removal, river structures and their coal combustion byproduct storage areas.
(g) Balance included $5 million in "Other current liabilities" on the balance sheet as of December 31, 2011.

Genco Asset Sale

In June 2010, Genco completed a sale of 25% of its Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $18 million and recognized a $5 million pretax gain from the sale.

In June 2011, Genco completed the sale of its remaining interest in the Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $45 million and recognized an $8 million pretax gain from the sale. Effective with the sale, the power purchase agreements between Marketing Company and the city of Columbia were terminated. Also in 2011, Genco sold additional property and assets for cash proceeds of $4 million, which resulted in pretax gains of $4 million.

Medina Valley Sale in 2012

In February 2012, Ameren completed the asset sale of its Medina Valley energy center's net property and plant for cash proceeds of $16 million and an additional $1 million payment at the two-year anniversary date of the sale if there are no violations of representations and warranties contained in the sale agreement.

Employee Separation and Other Charges

During the fourth quarter of 2011, as part of efforts to reduce operations and maintenance expenses, Ameren Missouri and Ameren Services extended voluntary separation offers consistent with Ameren's standard management separation program to eligible management and labor union-represented employees. Approximately 340 employees of Ameren Missouri and Ameren Services accepted the offers and left their employment by December 31, 2011. Ameren and Ameren Missouri recorded a pretax charge to earnings of $28 million and $27 million, respectively, for the severance costs related to these offers. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income for the year ended December 31, 2011. Substantially all of the severance costs will be paid in the first quarter of 2012 and were recorded in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. The severance costs related to participating Ameren Services employees were allocated to affiliates consistent with the terms of its support services agreement, which is described in Note 14 – Related Party Transactions.

Also during 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers at the end of 2011 resulted in the elimination of 90 positions. Ameren and Genco each recorded a $4 million pretax charge for related severance and relocation costs to "Goodwill, impairment and other charges" in their statements of income for the year ended December 31, 2011. The severance costs will be substantially paid during the first quarter of 2012 and were accrued in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

 

In 2010, Ameren's Merchant Generation segment initiated an involuntary separation program to reduce positions under the terms and benefits consistent with Ameren's standard management separation program. Ameren and Genco recorded a pretax charge to earnings of $4 million in 2010 for the severance costs related to this program. These charges were recorded in "Other operations and maintenance expense" on Ameren's and Genco's consolidated statement of income.

In 2009, Ameren initiated voluntary and involuntary separation programs under terms and benefits consistent with Ameren's standard management severance program. Ameren recorded a pretax charge to earnings of $17 million (Ameren Missouri – $8 million, Ameren Illinois – $3 million, Genco – $5 million) for the severance costs related to both the voluntary and involuntary separation programs. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income. The number of positions eliminated as a result of these separation programs was approximately 300. In its May 2010 electric rate order, the MoPSC allowed Ameren Missouri to recover the costs of this severance program from its customers. Therefore, in 2010 Ameren Missouri reclassified the 2009 "Other operations and maintenance expense" to "Regulatory assets." In addition to these programs, Genco recorded a $4 million pretax charge to 2009 earnings in connection with the retirement of two generating units at its Meredosia energy center and for related obsolete inventory.

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

General

Ameren, headquartered in St. Louis, Missouri, is a public utility holding company under PUHCA 2005, administered by FERC. Ameren's primary assets are the common stock of its subsidiaries. Ameren's subsidiaries are separate, independent legal entities with separate businesses, assets, and liabilities. These subsidiaries operate, as the case may be, rate-regulated electric generation, transmission and distribution businesses, rate-regulated natural gas transmission and distribution businesses, and merchant electric generation businesses in Missouri and Illinois. Dividends on Ameren's common stock and the payment of other expenses by Ameren depend on distributions made to it by its subsidiaries. Ameren's principal subsidiaries are listed below. Also see the Glossary of Terms and Abbreviations at the front of this report.

 

Ÿ  

Union Electric Company, or Ameren Missouri, operates a rate-regulated electric generation, transmission and distribution business, and a rate-regulated natural gas transmission and distribution business in Missouri. Ameren Missouri was incorporated in Missouri in 1922 and is successor to a number of companies, the oldest of which was organized in 1881. It is the largest electric utility in the state of Missouri. It supplies electric and natural gas service to a 24,000-square-mile area in central and eastern Missouri. This area has an estimated population of 2.9 million and includes the Greater St. Louis area. Ameren Missouri supplies electric service to 1.2 million customers and natural gas service to 127,000 customers.

Ÿ  

Ameren Illinois Company, or Ameren Illinois, operates a rate-regulated electric and natural gas transmission and distribution business in Illinois. Ameren Illinois was created by the merger of CILCO and IP with and into CIPS. CIPS was incorporated in Illinois in 1923 and is successor to a number of companies, the oldest of which was organized in 1902. Ameren Illinois supplies electric and natural gas utility service to portions of central and southern Illinois having an estimated population of 3.1 million in an area of 40,000 square miles. Ameren Illinois supplies electric service to 1.2 million customers and natural gas service to 809,000 customers.

Ÿ  

AER consists of non-rate-regulated operations, including Genco, AERG, Marketing Company and Medina Valley. The Medina Valley energy center was sold in February 2012. Genco operates a merchant electric generation business in Illinois and holds an 80% ownership interest in EEI, which it consolidates for financial reporting purposes. Genco was incorporated in Illinois in March 2000. Genco's coal and natural gas electric generating facilities are expected to have capacity of 3,095 and 1,348 megawatts, respectively, at the time of the 2012 peak summer electrical demand.

Ameren has various other subsidiaries responsible for activities such as the provision of shared services.

On October 1, 2010, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. Upon consummation of the Ameren Illinois Merger, the separate legal existence of CILCO and IP ended. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren and the subsequent contribution by Ameren of the AERG stock to AER. The Ameren Illinois Merger and the distribution of AERG stock were accounted for as transactions between entities under common control. In accordance with authoritative accounting guidance, assets and liabilities transferred between entities under common control were accounted for at the historical cost basis of the common parent, Ameren, as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in Ameren Illinois included purchase accounting adjustments related to Ameren's acquisition of CILCORP in 2003. Ameren Illinois accounted for the AERG distribution as a spinoff. Ameren Illinois transferred AERG to Ameren based on AERG's carrying value. Ameren Illinois has segregated AERG's operating results and cash flows and presented them separately as discontinued operations in its consolidated statement of income and consolidated statement of cash flows, respectively, for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operations remain classified as continuing operations. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

Effective January 1, 2010, as part of an internal reorganization, AER transferred its 80% stock ownership interest in EEI to Genco through a capital contribution. The

transfer of EEI to Genco was accounted for as a transaction between entities under common control, whereby Genco accounted for the transfer at the historical carrying value of the parent (Ameren) as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in EEI included purchase accounting adjustments relating to Ameren's acquisition of an additional 20% ownership interest in EEI in 2004. This transfer required Genco's prior-period financial statements to be retrospectively combined for all periods presented. Consequently, Genco's prior-period consolidated financial statements reflect EEI as if it had been a subsidiary of Genco. Ameren and Genco consolidate EEI for financial reporting purposes.

 

The financial statements of Ameren, Ameren Illinois and Genco are prepared on a consolidated basis. Ameren Missouri has no subsidiaries, and therefore its financial statements were not prepared on a consolidated basis. All significant intercompany transactions have been eliminated. All tabular dollar amounts are in millions, unless otherwise indicated.

Our accounting policies conform to GAAP. Our financial statements reflect all adjustments (which include normal, recurring adjustments) that are necessary, in our opinion, for a fair presentation of our results. The preparation of financial statements in conformity with GAAP requires that Ameren management make certain estimates and assumptions. Such estimates and assumptions affect reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the dates of financial statements, and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

During the second quarter of 2011, Genco identified an error in the cash flow statement classification of a capital contribution from Ameren that affected Genco's year ended December 31, 2010. For the year ended December 31, 2010, Genco's previously reported cash flows provided by operating activities were $280 million, and cash flows used in financing activities were $251 million. As corrected herein, Genco's cash flows provided by operating activities were $304 million and cash flows used in financing activities were $275 million. This correction had no impact on Ameren's previously reported consolidated statement of cash flows.

Regulation

Certain Ameren subsidiaries are regulated by the MoPSC, the ICC, and FERC. In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs as assets pursuant to actions of rate regulators or based on the expectation they will be able to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts as liabilities pursuant to actions of rate regulators or based on the expectation that such amounts will be returned to customers in future rates. Regulatory assets and liabilities are amortized consistent with the period of expected regulatory treatment. See Note 2 – Rate and Regulatory Matters for additional information on regulatory assets and liabilities. In addition, other costs that Ameren Missouri and Ameren Illinois expect to recover from customers are recorded as construction work in progress and property and plant, net. See Note 3 – Property and Plant, Net.

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand and temporary investments purchased with an original maturity of three months or less.

Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollectible. The allowance is calculated by applying estimated loss factors to various classes of outstanding receivables, including unbilled revenue. The loss factors used to estimate uncollectible accounts are based upon both historical collections experience and management's best estimate of future collections success given the existing and anticipated future collections environment. Ameren Illinois has a rate mechanism that adjusts rates for bad debt expense above or below those being collected in rates.

 

Materials and Supplies

Materials and supplies are recorded at the lower of cost or market. Cost is determined using the average-cost method. Materials and supplies are capitalized as inventory when purchased and then expensed or capitalized as plant assets when installed, as appropriate. The following table presents a breakdown of materials and supplies for each of the Ameren Companies at December 31, 2011, and 2010:

 

        Ameren(a)        Ameren Missouri        Ameren Illinois        Genco  

2011:

                   

Fuel(b)

     $         251         $         150         $ -         $ 76   

Gas stored underground

       171           22           149           -   

Other materials and supplies

       290           176           50           46   
       $ 712         $ 348         $         199         $         122   

2010:

                   

Fuel(b)

     $ 255         $ 152         $ -         $ 81   

Gas stored underground

       175           22           152           -   

Other materials and supplies

       277           167           46           49   
       $ 707         $ 341         $ 198         $ 130   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Consists of coal, oil, paint, propane, and tire chips.

 

Property and Plant

We capitalize the cost of additions to and betterments of units of property and plant. The cost includes labor, material, applicable taxes, and overhead. An allowance for funds used during construction, as discussed specifically below, is also capitalized as a cost of our rate-regulated assets. Interest incurred during construction is capitalized as a cost of merchant generation assets. Maintenance expenditures, including nuclear refueling and maintenance outages, are expensed as incurred. When units of depreciable property are retired, the original costs, less salvage values, are charged to accumulated depreciation. Asset removal costs incurred by our merchant generation operations that do not constitute legal obligations are expensed as incurred. Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Asset Retirement Obligations below and Note 3 – Property and Plant, Net, for additional information.

Depreciation

Depreciation is provided over the estimated lives of the various classes of depreciable property by applying composite rates on a straight-line basis to the cost basis of such property. The provision for depreciation for the Ameren Companies in 2011, 2010 and 2009 ranged from 3% to 4% of the average depreciable cost.

Allowance for Funds Used During Construction

In our rate-regulated operations, we capitalize the allowance for funds used during construction, or the cost of borrowed funds and the cost of equity funds (preferred and common stockholders' equity) applicable to rate-regulated construction expenditures, as is the utility industry accounting practice. Allowance for funds used during construction does not represent a current source of cash funds. This accounting practice offsets the effect on earnings of the cost of financing current construction, and it treats such financing costs in the same manner as construction charges for labor and materials.

Under accepted ratemaking practice, cash recovery of allowance for funds used during construction and other construction costs occurs when completed projects are placed in service and reflected in customer rates. The following table presents the annual allowance for funds used during construction rates that were utilized during 2011, 2010 and 2009:

 

          2011              2010              2009      

Ameren

     8% - 9%          8% - 9%          6% - 9%    

Ameren Missouri

     8             8             6       

Ameren Illinois

     9             9             9       

Goodwill and Intangible Assets

Goodwill. Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. As of December 31, 2011, Ameren's and Ameren Illinois' goodwill related to Ameren's acquisition of IP in 2004 and Ameren's acquisition of CILCORP in 2003.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events or changes in circumstances indicate that the asset might be impaired. During the fourth quarter of 2011, Ameren and Ameren Illinois used a qualitative evaluation to assess the likelihood of a goodwill impairment based on authoritative accounting guidance issued by the FASB in 2011. That evaluation led Ameren and Ameren Illinois to believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values, resulting in no impairment in 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the goodwill impairment recorded in 2010.

Intangible Assets. Ameren, Ameren Missouri and Genco classify emission allowances and renewable energy credits as intangible assets. We evaluate intangible assets for impairment if events or changes in circumstances indicate that their carrying amount might be impaired. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the intangible asset impairments recorded in 2011 and 2010.

At December 31, 2011, Ameren's and Ameren Missouri's intangible assets included renewable energy credits obtained through wind and solar power purchase agreements. The book value of each of Ameren's and Ameren Missouri's renewable energy credits was $7 million and less than $1 million at December 31, 2011, and 2010, respectively.

In July 2011, the EPA issued the CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of preexisting SO2 and NOx allowances to the acid rain program and NOx budget trading program, respectively. In anticipation of the CSAPR announcement, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash, pretax impairment charge of $2 million and $1 million, respectively, which was reflected in "Goodwill, impairment and other charges" on their statements of income. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact to earnings. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until that court proceeding is finalized, the EPA is expected to continue to administer the CAIR and to use CAIR's allowance program for compliance. During 2010, Ameren and Genco each recognized an impairment charge of intangible assets to reduce the carrying value of SO2 emission allowances. The charge was reflected in "Goodwill, impairment and other charges" in their statements of income. See Note 15 – Commitments and Contingencies for additional information on emission allowances and the CSAPR. The book value of each of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was less than $1 million at December 31, 2011. The book value of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was $7 million, $2 million, and $3 million, at December 31, 2010, respectively.

Renewable energy credits and emission allowances are charged to purchased power expense and fuel expense, respectively, as they are used in operations. The following table presents amortization expense based on usage of renewable energy credits and emission allowances, net of gains from sales, for Ameren, Ameren Missouri, Ameren Illinois, and Genco during the years ended December 31, 2011, 2010, and 2009. The table below does not include the intangible asset impairment charges referenced above.

 

        2011      2010        2009  

Ameren Missouri

     $ (a    $ 6         $ 2   

Ameren Illinois

           3         7           9   

Genco(b)

       2             18               24   

Other(b)(c)

       1         4           5   

Ameren(b)

     $ 6       $ 35         $ 40   

 

(a) Less than $1 million.
(b) Includes allowances consumed that were recorded through purchase accounting.
(c) Consists of renewable energy credit expense for Marketing Company and emission allowances expense for AERG.

Impairment of Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value. In the period in which we determine an asset meets the held for sale criteria, we record an impairment charge to the extent the book value exceeds its fair value less cost to sell. See Note 17 – Goodwill, Impairment and Other Charges for information about Ameren's, Ameren Missouri's and Genco's impairments.

Investments

Ameren and Ameren Missouri evaluate for impairment the investments held in Ameren Missouri's nuclear decommissioning trust fund. Losses on assets in the trust fund could result in higher funding requirements for decommissioning costs, which Ameren Missouri believes would be recovered in electric rates paid by its customers. Accordingly, Ameren and Ameren Missouri recognize a regulatory asset on their balance sheets for losses on investments held in the nuclear decommissioning trust fund. See Note 9 – Nuclear Decommissioning Trust Fund Investments for additional information.

 

Environmental Costs

Liabilities for environmental costs are recorded on an undiscounted basis when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are expensed or deferred as a regulatory asset when it is expected that the costs will be recovered from customers in future rates. If environmental expenditures are related to facilities currently in use, such as pollution control equipment, the cost is capitalized and depreciated over the expected life of the asset.

Unamortized Debt Discount, Premium, and Expense

Discount, premium, and expense associated with long-term debt are amortized over the lives of the related issues.

Revenue

Operating Revenues

Ameren Missouri, Ameren Illinois and Genco record operating revenue for electric or natural gas service when it is delivered to customers. We accrue an estimate of electric and natural gas revenues for service rendered but unbilled at the end of each accounting period.

Trading Activities

We present the revenues and costs associated with certain energy derivative contracts designated as trading on a net basis in "Operating Revenues – Electric" and "Operating Revenues – Other."

Nuclear Fuel

Ameren Missouri's cost of nuclear fuel is capitalized and then amortized to fuel expense on a unit-of-production basis. Spent fuel disposal cost is based on net kilowatthours generated and sold, and that cost is charged to expense.

Purchased Gas, Power and Fuel Rate-adjustment Mechanisms

Ameren's utility subsidiaries have various rate-adjustment mechanisms in place that provide for the recovery of purchased natural gas and electric fuel and purchased power costs. See Note 2 – Rate and Regulatory Matters for the regulatory assets and liabilities recorded at December 31, 2011, and 2010, related to the rate-adjustment mechanisms discussed below.

In Ameren Missouri's and Ameren Illinois' retail natural gas utility jurisdictions, changes in natural gas costs are generally reflected in billings to their natural gas utility customers through PGA clauses. The difference between actual natural gas costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to natural gas utility customers in a subsequent period.

 

In Ameren Illinois' retail electric utility jurisdictions, changes in purchased power costs are generally reflected in billings to their electric utility customers through pass-through rate-adjustment clauses. The difference between actual purchased power costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to electric utility customers in a subsequent period.

Ameren Missouri has a FAC that allows an adjustment of electric rates three times per year for a pass-through to customers of 95% of changes in fuel, emission allowances and purchased power costs, net of off-system revenues, including MISO costs and revenues, greater or less than the amount set in base rates, subject to MoPSC prudency review. The differences between the cost of fuel incurred and the cost of fuel recovered from Ameren Missouri's customers are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to Ameren Missouri's electric utility customers in a subsequent period.

Accounting for MISO Transactions

MISO-related purchase and sale transactions are recorded by Ameren, Ameren Missouri and Ameren Illinois using settlement information provided by MISO. These purchase and sale transactions are accounted for on a net hourly position. We record net purchases in a single hour in "Operating Expenses – Purchased power" and net sales in a single hour in "Operating Revenues – Electric" in our statements of income. On occasion, prior-period transactions will be resettled outside the routine settlement process because of a change in MISO's tariff or a material interpretation thereof. In these cases, Ameren, Ameren Missouri and Ameren Illinois recognize expenses associated with resettlements once the resettlement is probable and the resettlement amount can be estimated.

Stock-based Compensation

Stock-based compensation cost is measured at the grant date based on the fair value of the award. Ameren recognizes as compensation expense the estimated fair value of stock-based compensation on a straight-line basis over the requisite service period. See Note 12 – Stock-based Compensation for additional information.

Excise Taxes

Excise taxes imposed on us are reflected on Ameren Missouri customer electric bills and on Ameren Missouri and Ameren Illinois customer natural gas bills. They are recorded gross in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" on the statement of income. Excise taxes reflected on Ameren Illinois electric customer bills are imposed on the consumer and are therefore not included in revenues and expenses. They are recorded as tax collections payable and included in "Taxes accrued" on the balance sheet. The following table presents excise taxes recorded in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" for the years ended 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren Missouri

   $     137       $     130       $     112   

Ameren Illinois

     57         59         56   

Ameren

   $ 194       $ 189       $ 168   

Income Taxes

Ameren uses an asset and liability approach for its financial accounting and reporting of income taxes, in

accordance with authoritative accounting guidance. Deferred tax assets and liabilities are recognized for transactions that are treated differently for financial reporting and income tax return purposes. These deferred tax assets and liabilities are based on statutory tax rates.

We recognize that regulators will probably reduce future revenues for deferred tax liabilities that were initially recorded at rates in excess of the current statutory rate. Therefore, reductions in the deferred tax liability, which were recorded because of decreases in the statutory rate, have been credited to a regulatory liability. A regulatory asset has been established to recognize the probable recovery in rates of future income taxes, resulting principally from the reversal of allowance for funds used during construction. This refers to equity and temporary differences related to property and plant acquired before 1976 that were unrecognized temporary differences prior to the adoption of the authoritative accounting guidance for income taxes.

Investment tax credits used on tax returns for prior years have been deferred for book purposes; the credits are being amortized over the useful lives of the related investment. Deferred income taxes were recorded on the temporary difference represented by the deferred investment tax credits and a corresponding regulatory liability. This recognizes the expected reduction in rate revenue for future lower income taxes associated with the amortization of the investment tax credits. See Note 13 – Income Taxes.

Ameren Missouri, Ameren Illinois and Genco are parties to a tax sharing agreement with Ameren that provides for the allocation of consolidated tax liabilities. The tax sharing agreement specifies that each party be allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. Any net benefit attributable to the parent is reallocated to other members. That allocation is treated as a contribution of capital to the party receiving the benefit.

Noncontrolling Interests

Ameren's noncontrolling interests comprised the 20% of EEI not owned by Ameren and the preferred stock not subject to mandatory redemption of Ameren's subsidiaries. These noncontrolling interests are classified as a component of equity separate from Ameren's equity in its consolidated balance sheet. Genco's noncontrolling interest comprised the 20% of EEI not owned by Genco. This noncontrolling interest is classified as a component of equity separate from Genco's equity in its consolidated balance sheet.

Earnings per Share

There were no material differences between Ameren's basic and diluted earnings per share amounts in 2011, 2010, and 2009. The number of stock options, restricted stock shares, and performance share units outstanding was immaterial. There were no assumed stock option conversions in 2009 and 2010, as the remaining stock options were not dilutive. All of Ameren's stock options expired in February 2010.

Accounting Changes and Other Matters

The following is a summary of recently adopted authoritative accounting guidance as well as guidance issued but not yet adopted that could impact the Ameren Companies.

Disclosures about an Employer's Participation in a Multiemployer Plan

In September 2011, FASB amended its guidance to require employers to provide additional disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans. This guidance was applicable to Ameren Missouri, Ameren Illinois, and Genco because they participate in their parent's (Ameren's) benefit plans. Ameren Missouri, Ameren Illinois, and Genco adopted this guidance as of December 31, 2011. See Note 11 – Retirement Benefits for the required additional disclosures made by Ameren Missouri, Ameren Illinois and Genco, including the amount of their contributions to Ameren's benefit plans.

Testing of Goodwill for Impairment

In September 2011, FASB amended its guidance on testing of goodwill impairment. The amended guidance provided companies the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a two-step goodwill impairment test. As permitted, Ameren and Ameren Illinois early adopted the amended guidance for the annual goodwill impairment test performed as of October 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Disclosures about Fair Value Measurements

See Note 8 – Fair Value Measurements for adopted guidance on fair value measurements issued in January 2010, which became effective in its entirety for the Ameren Companies as of January 1, 2011.

In May 2011, FASB issued additional authoritative guidance regarding fair value measurements. The guidance amends the disclosure requirements for fair value measurements in order to align the principles for fair value measurements and the related disclosure requirements under GAAP and International Financial Reporting Standards. The amendments will not affect the Ameren Companies' results of operations, financial positions, or liquidity, as this guidance only requires additional disclosures. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012 with retrospective application required.

Presentation of Comprehensive Income

In June 2011, FASB amended its guidance on the presentation of comprehensive income in financial statements. The amended guidance will not affect the Ameren Companies' results of operations, financial positions, or liquidity. The amended guidance only changes the presentation of comprehensive income in the financial statements. It requires entities to report components of comprehensive income either in a continuous statement of comprehensive income or in two separate but consecutive statements. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012. In December 2011, the FASB amended the guidance to postpone a requirement to present reclassification adjustments by income component until further guidance is issued.

Asset Retirement Obligations

Authoritative accounting guidance requires us to record the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets in the period in which the liabilities are incurred and to capitalize a corresponding amount as part of the book value of the related long-lived asset. In subsequent periods, we are required to make adjustments to AROs based on changes in the estimated fair values of the obligations. Corresponding increases in asset book values are depreciated over the remaining useful life of the related asset. Uncertainties as to the probability, timing, or amount of cash flows associated with AROs affect our estimates of fair value. Ameren, Ameren Missouri and Genco have recorded AROs for retirement costs associated with Ameren Missouri's Callaway energy center decommissioning costs, asbestos removal, ash ponds, and river structures. In addition, Ameren, Ameren Missouri and Ameren Illinois have recorded AROs for the disposal of certain transformers.

Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Note 2 – Rate and Regulatory Matters.

 

The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the years 2011 and 2010:

 

      Ameren Missouri(a)     Ameren Illinois(b)     Genco      AERG     Ameren(a)  

Balance at December 31, 2009

   $     331      $      5      $     65       $     33      $     434   

Liabilities incurred

     5        (c     3         -        8   

Liabilities settled

     (4     (c     (c      (c     (4

Accretion in 2010(d)

     19        1        4         2        26   

Change in estimates(e)

     12        (3     2         (c     11   

Balance at December 31, 2010

   $ 363      $ 3      $ 74       $ 35      $ 475   

Liabilities incurred

     -        -        (c      -        (c

Liabilities settled

     (1     (c     (2      (c     (3

Accretion in 2011(d)

     20        (c     5         2        27   

Change in estimates(f)

     (54     (c     (6      (6     (66

Balance at December 31, 2011

   $ 328      $ 3      $ 71 (g)     $ 31      $ 433 (g) 

 

(a) The nuclear decommissioning trust fund assets of $357 million and $337 million as of December 31, 2011, and 2010, respectively, were restricted for decommissioning of the Callaway energy center.
(b) Balance included in "Other deferred credits and liabilities" on the balance sheet.
(c) Less than $1 million.
(d) Accretion expense was recorded as an increase to regulatory assets at Ameren Missouri and Ameren Illinois.
(e) Ameren Missouri and Genco changed their estimates for asbestos removal. Additionally, Genco changed the estimates related to retirement costs for its coal combustion byproduct storage areas.
(f) Ameren Missouri changed estimates related to its Callaway energy center decommissioning costs because of a cost study performed in 2011 and a decline in the cost escalation factor assumptions. Additionally, Ameren Missouri, Genco and AERG changed estimates related to retirement costs for asbestos removal, river structures and their coal combustion byproduct storage areas.
(g) Balance included $5 million in "Other current liabilities" on the balance sheet as of December 31, 2011.

Genco Asset Sale

In June 2010, Genco completed a sale of 25% of its Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $18 million and recognized a $5 million pretax gain from the sale.

In June 2011, Genco completed the sale of its remaining interest in the Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $45 million and recognized an $8 million pretax gain from the sale. Effective with the sale, the power purchase agreements between Marketing Company and the city of Columbia were terminated. Also in 2011, Genco sold additional property and assets for cash proceeds of $4 million, which resulted in pretax gains of $4 million.

Medina Valley Sale in 2012

In February 2012, Ameren completed the asset sale of its Medina Valley energy center's net property and plant for cash proceeds of $16 million and an additional $1 million payment at the two-year anniversary date of the sale if there are no violations of representations and warranties contained in the sale agreement.

Employee Separation and Other Charges

During the fourth quarter of 2011, as part of efforts to reduce operations and maintenance expenses, Ameren Missouri and Ameren Services extended voluntary separation offers consistent with Ameren's standard management separation program to eligible management and labor union-represented employees. Approximately 340 employees of Ameren Missouri and Ameren Services accepted the offers and left their employment by December 31, 2011. Ameren and Ameren Missouri recorded a pretax charge to earnings of $28 million and $27 million, respectively, for the severance costs related to these offers. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income for the year ended December 31, 2011. Substantially all of the severance costs will be paid in the first quarter of 2012 and were recorded in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. The severance costs related to participating Ameren Services employees were allocated to affiliates consistent with the terms of its support services agreement, which is described in Note 14 – Related Party Transactions.

Also during 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers at the end of 2011 resulted in the elimination of 90 positions. Ameren and Genco each recorded a $4 million pretax charge for related severance and relocation costs to "Goodwill, impairment and other charges" in their statements of income for the year ended December 31, 2011. The severance costs will be substantially paid during the first quarter of 2012 and were accrued in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

 

In 2010, Ameren's Merchant Generation segment initiated an involuntary separation program to reduce positions under the terms and benefits consistent with Ameren's standard management separation program. Ameren and Genco recorded a pretax charge to earnings of $4 million in 2010 for the severance costs related to this program. These charges were recorded in "Other operations and maintenance expense" on Ameren's and Genco's consolidated statement of income.

In 2009, Ameren initiated voluntary and involuntary separation programs under terms and benefits consistent with Ameren's standard management severance program. Ameren recorded a pretax charge to earnings of $17 million (Ameren Missouri – $8 million, Ameren Illinois – $3 million, Genco – $5 million) for the severance costs related to both the voluntary and involuntary separation programs. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income. The number of positions eliminated as a result of these separation programs was approximately 300. In its May 2010 electric rate order, the MoPSC allowed Ameren Missouri to recover the costs of this severance program from its customers. Therefore, in 2010 Ameren Missouri reclassified the 2009 "Other operations and maintenance expense" to "Regulatory assets." In addition to these programs, Genco recorded a $4 million pretax charge to 2009 earnings in connection with the retirement of two generating units at its Meredosia energy center and for related obsolete inventory.

NOTE 1 – SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

General

Ameren, headquartered in St. Louis, Missouri, is a public utility holding company under PUHCA 2005, administered by FERC. Ameren's primary assets are the common stock of its subsidiaries. Ameren's subsidiaries are separate, independent legal entities with separate businesses, assets, and liabilities. These subsidiaries operate, as the case may be, rate-regulated electric generation, transmission and distribution businesses, rate-regulated natural gas transmission and distribution businesses, and merchant electric generation businesses in Missouri and Illinois. Dividends on Ameren's common stock and the payment of other expenses by Ameren depend on distributions made to it by its subsidiaries. Ameren's principal subsidiaries are listed below. Also see the Glossary of Terms and Abbreviations at the front of this report.

 

Ÿ  

Union Electric Company, or Ameren Missouri, operates a rate-regulated electric generation, transmission and distribution business, and a rate-regulated natural gas transmission and distribution business in Missouri. Ameren Missouri was incorporated in Missouri in 1922 and is successor to a number of companies, the oldest of which was organized in 1881. It is the largest electric utility in the state of Missouri. It supplies electric and natural gas service to a 24,000-square-mile area in central and eastern Missouri. This area has an estimated population of 2.9 million and includes the Greater St. Louis area. Ameren Missouri supplies electric service to 1.2 million customers and natural gas service to 127,000 customers.

Ÿ  

Ameren Illinois Company, or Ameren Illinois, operates a rate-regulated electric and natural gas transmission and distribution business in Illinois. Ameren Illinois was created by the merger of CILCO and IP with and into CIPS. CIPS was incorporated in Illinois in 1923 and is successor to a number of companies, the oldest of which was organized in 1902. Ameren Illinois supplies electric and natural gas utility service to portions of central and southern Illinois having an estimated population of 3.1 million in an area of 40,000 square miles. Ameren Illinois supplies electric service to 1.2 million customers and natural gas service to 809,000 customers.

Ÿ  

AER consists of non-rate-regulated operations, including Genco, AERG, Marketing Company and Medina Valley. The Medina Valley energy center was sold in February 2012. Genco operates a merchant electric generation business in Illinois and holds an 80% ownership interest in EEI, which it consolidates for financial reporting purposes. Genco was incorporated in Illinois in March 2000. Genco's coal and natural gas electric generating facilities are expected to have capacity of 3,095 and 1,348 megawatts, respectively, at the time of the 2012 peak summer electrical demand.

Ameren has various other subsidiaries responsible for activities such as the provision of shared services.

On October 1, 2010, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. Upon consummation of the Ameren Illinois Merger, the separate legal existence of CILCO and IP ended. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren and the subsequent contribution by Ameren of the AERG stock to AER. The Ameren Illinois Merger and the distribution of AERG stock were accounted for as transactions between entities under common control. In accordance with authoritative accounting guidance, assets and liabilities transferred between entities under common control were accounted for at the historical cost basis of the common parent, Ameren, as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in Ameren Illinois included purchase accounting adjustments related to Ameren's acquisition of CILCORP in 2003. Ameren Illinois accounted for the AERG distribution as a spinoff. Ameren Illinois transferred AERG to Ameren based on AERG's carrying value. Ameren Illinois has segregated AERG's operating results and cash flows and presented them separately as discontinued operations in its consolidated statement of income and consolidated statement of cash flows, respectively, for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operations remain classified as continuing operations. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

Effective January 1, 2010, as part of an internal reorganization, AER transferred its 80% stock ownership interest in EEI to Genco through a capital contribution. The

transfer of EEI to Genco was accounted for as a transaction between entities under common control, whereby Genco accounted for the transfer at the historical carrying value of the parent (Ameren) as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in EEI included purchase accounting adjustments relating to Ameren's acquisition of an additional 20% ownership interest in EEI in 2004. This transfer required Genco's prior-period financial statements to be retrospectively combined for all periods presented. Consequently, Genco's prior-period consolidated financial statements reflect EEI as if it had been a subsidiary of Genco. Ameren and Genco consolidate EEI for financial reporting purposes.

 

The financial statements of Ameren, Ameren Illinois and Genco are prepared on a consolidated basis. Ameren Missouri has no subsidiaries, and therefore its financial statements were not prepared on a consolidated basis. All significant intercompany transactions have been eliminated. All tabular dollar amounts are in millions, unless otherwise indicated.

Our accounting policies conform to GAAP. Our financial statements reflect all adjustments (which include normal, recurring adjustments) that are necessary, in our opinion, for a fair presentation of our results. The preparation of financial statements in conformity with GAAP requires that Ameren management make certain estimates and assumptions. Such estimates and assumptions affect reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the dates of financial statements, and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

During the second quarter of 2011, Genco identified an error in the cash flow statement classification of a capital contribution from Ameren that affected Genco's year ended December 31, 2010. For the year ended December 31, 2010, Genco's previously reported cash flows provided by operating activities were $280 million, and cash flows used in financing activities were $251 million. As corrected herein, Genco's cash flows provided by operating activities were $304 million and cash flows used in financing activities were $275 million. This correction had no impact on Ameren's previously reported consolidated statement of cash flows.

Regulation

Certain Ameren subsidiaries are regulated by the MoPSC, the ICC, and FERC. In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs as assets pursuant to actions of rate regulators or based on the expectation they will be able to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts as liabilities pursuant to actions of rate regulators or based on the expectation that such amounts will be returned to customers in future rates. Regulatory assets and liabilities are amortized consistent with the period of expected regulatory treatment. See Note 2 – Rate and Regulatory Matters for additional information on regulatory assets and liabilities. In addition, other costs that Ameren Missouri and Ameren Illinois expect to recover from customers are recorded as construction work in progress and property and plant, net. See Note 3 – Property and Plant, Net.

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand and temporary investments purchased with an original maturity of three months or less.

Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollectible. The allowance is calculated by applying estimated loss factors to various classes of outstanding receivables, including unbilled revenue. The loss factors used to estimate uncollectible accounts are based upon both historical collections experience and management's best estimate of future collections success given the existing and anticipated future collections environment. Ameren Illinois has a rate mechanism that adjusts rates for bad debt expense above or below those being collected in rates.

 

Materials and Supplies

Materials and supplies are recorded at the lower of cost or market. Cost is determined using the average-cost method. Materials and supplies are capitalized as inventory when purchased and then expensed or capitalized as plant assets when installed, as appropriate. The following table presents a breakdown of materials and supplies for each of the Ameren Companies at December 31, 2011, and 2010:

 

        Ameren(a)        Ameren Missouri        Ameren Illinois        Genco  

2011:

                   

Fuel(b)

     $         251         $         150         $ -         $ 76   

Gas stored underground

       171           22           149           -   

Other materials and supplies

       290           176           50           46   
       $ 712         $ 348         $         199         $         122   

2010:

                   

Fuel(b)

     $ 255         $ 152         $ -         $ 81   

Gas stored underground

       175           22           152           -   

Other materials and supplies

       277           167           46           49   
       $ 707         $ 341         $ 198         $ 130   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Consists of coal, oil, paint, propane, and tire chips.

 

Property and Plant

We capitalize the cost of additions to and betterments of units of property and plant. The cost includes labor, material, applicable taxes, and overhead. An allowance for funds used during construction, as discussed specifically below, is also capitalized as a cost of our rate-regulated assets. Interest incurred during construction is capitalized as a cost of merchant generation assets. Maintenance expenditures, including nuclear refueling and maintenance outages, are expensed as incurred. When units of depreciable property are retired, the original costs, less salvage values, are charged to accumulated depreciation. Asset removal costs incurred by our merchant generation operations that do not constitute legal obligations are expensed as incurred. Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Asset Retirement Obligations below and Note 3 – Property and Plant, Net, for additional information.

Depreciation

Depreciation is provided over the estimated lives of the various classes of depreciable property by applying composite rates on a straight-line basis to the cost basis of such property. The provision for depreciation for the Ameren Companies in 2011, 2010 and 2009 ranged from 3% to 4% of the average depreciable cost.

Allowance for Funds Used During Construction

In our rate-regulated operations, we capitalize the allowance for funds used during construction, or the cost of borrowed funds and the cost of equity funds (preferred and common stockholders' equity) applicable to rate-regulated construction expenditures, as is the utility industry accounting practice. Allowance for funds used during construction does not represent a current source of cash funds. This accounting practice offsets the effect on earnings of the cost of financing current construction, and it treats such financing costs in the same manner as construction charges for labor and materials.

Under accepted ratemaking practice, cash recovery of allowance for funds used during construction and other construction costs occurs when completed projects are placed in service and reflected in customer rates. The following table presents the annual allowance for funds used during construction rates that were utilized during 2011, 2010 and 2009:

 

          2011              2010              2009      

Ameren

     8% - 9%          8% - 9%          6% - 9%    

Ameren Missouri

     8             8             6       

Ameren Illinois

     9             9             9       

Goodwill and Intangible Assets

Goodwill. Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. As of December 31, 2011, Ameren's and Ameren Illinois' goodwill related to Ameren's acquisition of IP in 2004 and Ameren's acquisition of CILCORP in 2003.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events or changes in circumstances indicate that the asset might be impaired. During the fourth quarter of 2011, Ameren and Ameren Illinois used a qualitative evaluation to assess the likelihood of a goodwill impairment based on authoritative accounting guidance issued by the FASB in 2011. That evaluation led Ameren and Ameren Illinois to believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values, resulting in no impairment in 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the goodwill impairment recorded in 2010.

Intangible Assets. Ameren, Ameren Missouri and Genco classify emission allowances and renewable energy credits as intangible assets. We evaluate intangible assets for impairment if events or changes in circumstances indicate that their carrying amount might be impaired. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the intangible asset impairments recorded in 2011 and 2010.

At December 31, 2011, Ameren's and Ameren Missouri's intangible assets included renewable energy credits obtained through wind and solar power purchase agreements. The book value of each of Ameren's and Ameren Missouri's renewable energy credits was $7 million and less than $1 million at December 31, 2011, and 2010, respectively.

In July 2011, the EPA issued the CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of preexisting SO2 and NOx allowances to the acid rain program and NOx budget trading program, respectively. In anticipation of the CSAPR announcement, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash, pretax impairment charge of $2 million and $1 million, respectively, which was reflected in "Goodwill, impairment and other charges" on their statements of income. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact to earnings. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until that court proceeding is finalized, the EPA is expected to continue to administer the CAIR and to use CAIR's allowance program for compliance. During 2010, Ameren and Genco each recognized an impairment charge of intangible assets to reduce the carrying value of SO2 emission allowances. The charge was reflected in "Goodwill, impairment and other charges" in their statements of income. See Note 15 – Commitments and Contingencies for additional information on emission allowances and the CSAPR. The book value of each of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was less than $1 million at December 31, 2011. The book value of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was $7 million, $2 million, and $3 million, at December 31, 2010, respectively.

Renewable energy credits and emission allowances are charged to purchased power expense and fuel expense, respectively, as they are used in operations. The following table presents amortization expense based on usage of renewable energy credits and emission allowances, net of gains from sales, for Ameren, Ameren Missouri, Ameren Illinois, and Genco during the years ended December 31, 2011, 2010, and 2009. The table below does not include the intangible asset impairment charges referenced above.

 

        2011      2010        2009  

Ameren Missouri

     $ (a    $ 6         $ 2   

Ameren Illinois

           3         7           9   

Genco(b)

       2             18               24   

Other(b)(c)

       1         4           5   

Ameren(b)

     $ 6       $ 35         $ 40   

 

(a) Less than $1 million.
(b) Includes allowances consumed that were recorded through purchase accounting.
(c) Consists of renewable energy credit expense for Marketing Company and emission allowances expense for AERG.

Impairment of Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value. In the period in which we determine an asset meets the held for sale criteria, we record an impairment charge to the extent the book value exceeds its fair value less cost to sell. See Note 17 – Goodwill, Impairment and Other Charges for information about Ameren's, Ameren Missouri's and Genco's impairments.

Investments

Ameren and Ameren Missouri evaluate for impairment the investments held in Ameren Missouri's nuclear decommissioning trust fund. Losses on assets in the trust fund could result in higher funding requirements for decommissioning costs, which Ameren Missouri believes would be recovered in electric rates paid by its customers. Accordingly, Ameren and Ameren Missouri recognize a regulatory asset on their balance sheets for losses on investments held in the nuclear decommissioning trust fund. See Note 9 – Nuclear Decommissioning Trust Fund Investments for additional information.

 

Environmental Costs

Liabilities for environmental costs are recorded on an undiscounted basis when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are expensed or deferred as a regulatory asset when it is expected that the costs will be recovered from customers in future rates. If environmental expenditures are related to facilities currently in use, such as pollution control equipment, the cost is capitalized and depreciated over the expected life of the asset.

Unamortized Debt Discount, Premium, and Expense

Discount, premium, and expense associated with long-term debt are amortized over the lives of the related issues.

Revenue

Operating Revenues

Ameren Missouri, Ameren Illinois and Genco record operating revenue for electric or natural gas service when it is delivered to customers. We accrue an estimate of electric and natural gas revenues for service rendered but unbilled at the end of each accounting period.

Trading Activities

We present the revenues and costs associated with certain energy derivative contracts designated as trading on a net basis in "Operating Revenues – Electric" and "Operating Revenues – Other."

Nuclear Fuel

Ameren Missouri's cost of nuclear fuel is capitalized and then amortized to fuel expense on a unit-of-production basis. Spent fuel disposal cost is based on net kilowatthours generated and sold, and that cost is charged to expense.

Purchased Gas, Power and Fuel Rate-adjustment Mechanisms

Ameren's utility subsidiaries have various rate-adjustment mechanisms in place that provide for the recovery of purchased natural gas and electric fuel and purchased power costs. See Note 2 – Rate and Regulatory Matters for the regulatory assets and liabilities recorded at December 31, 2011, and 2010, related to the rate-adjustment mechanisms discussed below.

In Ameren Missouri's and Ameren Illinois' retail natural gas utility jurisdictions, changes in natural gas costs are generally reflected in billings to their natural gas utility customers through PGA clauses. The difference between actual natural gas costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to natural gas utility customers in a subsequent period.

 

In Ameren Illinois' retail electric utility jurisdictions, changes in purchased power costs are generally reflected in billings to their electric utility customers through pass-through rate-adjustment clauses. The difference between actual purchased power costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to electric utility customers in a subsequent period.

Ameren Missouri has a FAC that allows an adjustment of electric rates three times per year for a pass-through to customers of 95% of changes in fuel, emission allowances and purchased power costs, net of off-system revenues, including MISO costs and revenues, greater or less than the amount set in base rates, subject to MoPSC prudency review. The differences between the cost of fuel incurred and the cost of fuel recovered from Ameren Missouri's customers are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to Ameren Missouri's electric utility customers in a subsequent period.

Accounting for MISO Transactions

MISO-related purchase and sale transactions are recorded by Ameren, Ameren Missouri and Ameren Illinois using settlement information provided by MISO. These purchase and sale transactions are accounted for on a net hourly position. We record net purchases in a single hour in "Operating Expenses – Purchased power" and net sales in a single hour in "Operating Revenues – Electric" in our statements of income. On occasion, prior-period transactions will be resettled outside the routine settlement process because of a change in MISO's tariff or a material interpretation thereof. In these cases, Ameren, Ameren Missouri and Ameren Illinois recognize expenses associated with resettlements once the resettlement is probable and the resettlement amount can be estimated.

Stock-based Compensation

Stock-based compensation cost is measured at the grant date based on the fair value of the award. Ameren recognizes as compensation expense the estimated fair value of stock-based compensation on a straight-line basis over the requisite service period. See Note 12 – Stock-based Compensation for additional information.

Excise Taxes

Excise taxes imposed on us are reflected on Ameren Missouri customer electric bills and on Ameren Missouri and Ameren Illinois customer natural gas bills. They are recorded gross in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" on the statement of income. Excise taxes reflected on Ameren Illinois electric customer bills are imposed on the consumer and are therefore not included in revenues and expenses. They are recorded as tax collections payable and included in "Taxes accrued" on the balance sheet. The following table presents excise taxes recorded in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" for the years ended 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren Missouri

   $     137       $     130       $     112   

Ameren Illinois

     57         59         56   

Ameren

   $ 194       $ 189       $ 168   

Income Taxes

Ameren uses an asset and liability approach for its financial accounting and reporting of income taxes, in

accordance with authoritative accounting guidance. Deferred tax assets and liabilities are recognized for transactions that are treated differently for financial reporting and income tax return purposes. These deferred tax assets and liabilities are based on statutory tax rates.

We recognize that regulators will probably reduce future revenues for deferred tax liabilities that were initially recorded at rates in excess of the current statutory rate. Therefore, reductions in the deferred tax liability, which were recorded because of decreases in the statutory rate, have been credited to a regulatory liability. A regulatory asset has been established to recognize the probable recovery in rates of future income taxes, resulting principally from the reversal of allowance for funds used during construction. This refers to equity and temporary differences related to property and plant acquired before 1976 that were unrecognized temporary differences prior to the adoption of the authoritative accounting guidance for income taxes.

Investment tax credits used on tax returns for prior years have been deferred for book purposes; the credits are being amortized over the useful lives of the related investment. Deferred income taxes were recorded on the temporary difference represented by the deferred investment tax credits and a corresponding regulatory liability. This recognizes the expected reduction in rate revenue for future lower income taxes associated with the amortization of the investment tax credits. See Note 13 – Income Taxes.

Ameren Missouri, Ameren Illinois and Genco are parties to a tax sharing agreement with Ameren that provides for the allocation of consolidated tax liabilities. The tax sharing agreement specifies that each party be allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. Any net benefit attributable to the parent is reallocated to other members. That allocation is treated as a contribution of capital to the party receiving the benefit.

Noncontrolling Interests

Ameren's noncontrolling interests comprised the 20% of EEI not owned by Ameren and the preferred stock not subject to mandatory redemption of Ameren's subsidiaries. These noncontrolling interests are classified as a component of equity separate from Ameren's equity in its consolidated balance sheet. Genco's noncontrolling interest comprised the 20% of EEI not owned by Genco. This noncontrolling interest is classified as a component of equity separate from Genco's equity in its consolidated balance sheet.

Earnings per Share

There were no material differences between Ameren's basic and diluted earnings per share amounts in 2011, 2010, and 2009. The number of stock options, restricted stock shares, and performance share units outstanding was immaterial. There were no assumed stock option conversions in 2009 and 2010, as the remaining stock options were not dilutive. All of Ameren's stock options expired in February 2010.

Accounting Changes and Other Matters

The following is a summary of recently adopted authoritative accounting guidance as well as guidance issued but not yet adopted that could impact the Ameren Companies.

Disclosures about an Employer's Participation in a Multiemployer Plan

In September 2011, FASB amended its guidance to require employers to provide additional disclosures for multiemployer pension plans and multiemployer other postretirement benefit plans. This guidance was applicable to Ameren Missouri, Ameren Illinois, and Genco because they participate in their parent's (Ameren's) benefit plans. Ameren Missouri, Ameren Illinois, and Genco adopted this guidance as of December 31, 2011. See Note 11 – Retirement Benefits for the required additional disclosures made by Ameren Missouri, Ameren Illinois and Genco, including the amount of their contributions to Ameren's benefit plans.

Testing of Goodwill for Impairment

In September 2011, FASB amended its guidance on testing of goodwill impairment. The amended guidance provided companies the option to first assess qualitative factors to determine whether it is more likely than not that the fair value of a reporting unit is less than its carrying amount as a basis for determining whether it is necessary to perform a two-step goodwill impairment test. As permitted, Ameren and Ameren Illinois early adopted the amended guidance for the annual goodwill impairment test performed as of October 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Disclosures about Fair Value Measurements

See Note 8 – Fair Value Measurements for adopted guidance on fair value measurements issued in January 2010, which became effective in its entirety for the Ameren Companies as of January 1, 2011.

In May 2011, FASB issued additional authoritative guidance regarding fair value measurements. The guidance amends the disclosure requirements for fair value measurements in order to align the principles for fair value measurements and the related disclosure requirements under GAAP and International Financial Reporting Standards. The amendments will not affect the Ameren Companies' results of operations, financial positions, or liquidity, as this guidance only requires additional disclosures. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012 with retrospective application required.

Presentation of Comprehensive Income

In June 2011, FASB amended its guidance on the presentation of comprehensive income in financial statements. The amended guidance will not affect the Ameren Companies' results of operations, financial positions, or liquidity. The amended guidance changes the presentation of comprehensive income in the financial statements. It requires entities to report components of comprehensive income either in a continuous statement of comprehensive income or in two separate but consecutive statements. This guidance will be effective for the Ameren Companies beginning in the first quarter of 2012. In December 2011, the FASB amended the guidance to postpone a requirement to present reclassification adjustments by income component until further guidance is issued.

Asset Retirement Obligations

Authoritative accounting guidance requires us to record the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets in the period in which the liabilities are incurred and to capitalize a corresponding amount as part of the book value of the related long-lived asset. In subsequent periods, we are required to make adjustments to AROs based on changes in the estimated fair values of the obligations. Corresponding increases in asset book values are depreciated over the remaining useful life of the related asset. Uncertainties as to the probability, timing, or amount of cash flows associated with AROs affect our estimates of fair value. Ameren, Ameren Missouri and Genco have recorded AROs for retirement costs associated with Ameren Missouri's Callaway energy center decommissioning costs, asbestos removal, ash ponds, and river structures. In addition, Ameren, Ameren Missouri and Ameren Illinois have recorded AROs for the disposal of certain transformers.

Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Note 2 – Rate and Regulatory Matters.

 

The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the years 2011 and 2010:

 

      Ameren Missouri(a)     Ameren Illinois(b)     Genco      AERG     Ameren(a)  

Balance at December 31, 2009

   $     331      $      5      $     65       $     33      $     434   

Liabilities incurred

     5        (c     3         -        8   

Liabilities settled

     (4     (c     (c      (c     (4

Accretion in 2010(d)

     19        1        4         2        26   

Change in estimates(e)

     12        (3     2         (c     11   

Balance at December 31, 2010

   $ 363      $ 3      $ 74       $ 35      $ 475   

Liabilities incurred

     -        -        (c      -        (c

Liabilities settled

     (1     (c     (2      (c     (3

Accretion in 2011(d)

     20        (c     5         2        27   

Change in estimates(f)

     (54     (c     (6      (6     (66

Balance at December 31, 2011

   $ 328      $ 3      $ 71 (g)     $ 31      $ 433 (g) 

 

(a) The nuclear decommissioning trust fund assets of $357 million and $337 million as of December 31, 2011, and 2010, respectively, were restricted for decommissioning of the Callaway energy center.
(b) Balance included in "Other deferred credits and liabilities" on the balance sheet.
(c) Less than $1 million.
(d) Accretion expense was recorded as an increase to regulatory assets at Ameren Missouri and Ameren Illinois.
(e) Ameren Missouri and Genco changed their estimates for asbestos removal. Additionally, Genco changed the estimates related to retirement costs for its coal combustion byproduct storage areas.
(f) Ameren Missouri changed estimates related to its Callaway energy center decommissioning costs because of a cost study performed in 2011 and a decline in the cost escalation factor assumptions. Additionally, Ameren Missouri, Genco and AERG changed estimates related to retirement costs for asbestos removal, river structures and their coal combustion byproduct storage areas.
(g) Balance included $5 million in "Other current liabilities" on the balance sheet as of December 31, 2011.

Genco Asset Sale

In June 2010, Genco completed a sale of 25% of its Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $18 million and recognized a $5 million pretax gain from the sale.

In June 2011, Genco completed the sale of its remaining interest in the Columbia CT energy center to the city of Columbia, Missouri. Genco received cash proceeds of $45 million and recognized an $8 million pretax gain from the sale. Effective with the sale, the power purchase agreements between Marketing Company and the city of Columbia were terminated. Also in 2011, Genco sold additional property and assets for cash proceeds of $4 million, which resulted in pretax gains of $4 million.

Medina Valley Sale in 2012

In February 2012, Ameren completed the asset sale of its Medina Valley energy center's net property and plant for cash proceeds of $16 million and an additional $1 million payment at the two-year anniversary date of the sale if there are no violations of representations and warranties contained in the sale agreement.

Employee Separation and Other Charges

During the fourth quarter of 2011, as part of efforts to reduce operations and maintenance expenses, Ameren Missouri and Ameren Services extended voluntary separation offers consistent with Ameren's standard management separation program to eligible management and labor union-represented employees. Approximately 340 employees of Ameren Missouri and Ameren Services accepted the offers and left their employment by December 31, 2011. Ameren and Ameren Missouri recorded a pretax charge to earnings of $28 million and $27 million, respectively, for the severance costs related to these offers. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income for the year ended December 31, 2011. Substantially all of the severance costs will be paid in the first quarter of 2012 and were recorded in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. The severance costs related to participating Ameren Services employees were allocated to affiliates consistent with the terms of its support services agreement, which is described in Note 14 – Related Party Transactions.

Also during 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers at the end of 2011 resulted in the elimination of 90 positions. Ameren and Genco each recorded a $4 million pretax charge for related severance and relocation costs to "Goodwill, impairment and other charges" in their statements of income for the year ended December 31, 2011. The severance costs will be substantially paid during the first quarter of 2012 and were accrued in "Accounts and wages payable" on each company's balance sheet at December 31, 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

 

In 2010, Ameren's Merchant Generation segment initiated an involuntary separation program to reduce positions under the terms and benefits consistent with Ameren's standard management separation program. Ameren and Genco recorded a pretax charge to earnings of $4 million in 2010 for the severance costs related to this program. These charges were recorded in "Other operations and maintenance expense" on Ameren's and Genco's consolidated statement of income.

In 2009, Ameren initiated voluntary and involuntary separation programs under terms and benefits consistent with Ameren's standard management severance program. Ameren recorded a pretax charge to earnings of $17 million (Ameren Missouri – $8 million, Ameren Illinois – $3 million, Genco – $5 million) for the severance costs related to both the voluntary and involuntary separation programs. These charges were recorded in "Other operations and maintenance expense" in each company's statement of income. The number of positions eliminated as a result of these separation programs was approximately 300. In its May 2010 electric rate order, the MoPSC allowed Ameren Missouri to recover the costs of this severance program from its customers. Therefore, in 2010 Ameren Missouri reclassified the 2009 "Other operations and maintenance expense" to "Regulatory assets." In addition to these programs, Genco recorded a $4 million pretax charge to 2009 earnings in connection with the retirement of two generating units at its Meredosia energy center and for related obsolete inventory.

Rate And Regulatory Matters

NOTE 2 – RATE AND REGULATORY MATTERS

Below is a summary of significant regulatory proceedings and related lawsuits. We are unable to predict the ultimate outcome of these matters, the timing of the final decisions of the various agencies and courts, or the impact on our results of operations, financial position, or liquidity.

Missouri

2009 Electric Rate Order

In February 2009, Noranda, Ameren Missouri's largest electric customer, and the MoOPC appealed certain aspects of the MoPSC's 2009 electric rate order to the Circuit Court of Stoddard County, Missouri. In September 2009, the Stoddard County Circuit Court granted Noranda's request to stay the electric rate increase granted by the January 2009 MoPSC's order as it applied specifically to Noranda's electric service account until the court rendered its decision on the appeal. From the granting of the stay request until June 2010, Noranda paid into the Stoddard County Circuit Court's registry the entire amount of its monthly base rate increase and monthly FAC payments. In June 2010, when the May 2010 electric rate order became effective, Noranda ceased making base rate payments into the Stoddard County Circuit Court's registry. Noranda continued to pay into the Stoddard County Circuit Court's registry its monthly FAC payments related to electric service received during the time periods prior to the effectiveness of the May 2010 electric rate order.

In August 2010, the Stoddard County Circuit Court issued a judgment that reversed parts of the MoPSC's decision. However, upon issuance, the Stoddard County Circuit Court suspended its own judgment. Ameren Missouri filed an appeal of the Stoddard County Circuit Court's judgment with the Missouri Court of Appeals, Southern District. In November 2011, the Missouri Court of Appeals issued a ruling that upheld the MoPSC's January 2009 electric rate order; thereby reversing the Stoddard County Circuit Court's August 2010 decision. As of December 31, 2011, the amount held in the Stoddard County Circuit Court's registry was $20 million. That amount was reflected in "Accounts receivable-trade" on Ameren's and Ameren Missouri's balance sheets at December 31, 2011. Ameren Missouri expects to receive all of the funds held in the Stoddard County Circuit Court's registry relating to the stay during the first quarter of 2012.

2010 Electric Rate Order

In May 2010, the MoPSC issued an order approving an increase for Ameren Missouri in annual revenues for electric service of $230 million.

The MIEC and MoOPC appealed certain aspects of the MoPSC order to the Cole County Circuit Court. In addition to the MIEC appeal, four industrial customers, who are members of MIEC, also filed a request for a stay with the Cole County Circuit Court. In December 2010, the Cole County Circuit Court granted the request of the four industrial customers to stay the MoPSC's 2010 electric rate order and required those customers to pay into the Cole County Circuit Court's registry the difference between their billings under the 2010 Missouri electric rate order and their billings under a Missouri electric rate order that became effective in June 2007, which was, at that time, the last Ameren Missouri rate order for which appeals had been exhausted. In February 2011, the four industrial customers posted the bond required by the stay. Since the bond was posted, the four industrial customers have made payments into the Cole County Circuit Court's registry equal to the difference between their base rate billings under 2010 electric rates and 2007 electric rates, as well as their FAC amounts to the extent those billings relate to service prior to the effective date of the new rates established by the 2011 electric rate order. Because of the lag between accumulations of changes in net fuel costs and the time those net fuel costs are recovered through FAC charges applied to customers' bills, the four industrial customers will continue to pay a portion of their FAC payments to the Cole County Circuit Court's registry for service prior to the effective date of the new rates by the 2011 electric rate order. It is expected that a portion of the FAC billings invoiced to these customers in September 2012 would be the last contested amount deposited into the Cole County Circuit Court's registry relating to this 2010 electric rate order appeal, pending resolution of the appeal. As of December 31, 2011, the amount held by the Cole County Circuit Court, excluding the bond amount, was $15 million. This amount held in the registry was reflected in "Accounts receivable-trade" on Ameren's and Ameren Missouri's balance sheets at December 31, 2011.

A Cole County Circuit Court decision is expected during the first quarter of 2012 on the MIEC's and MoOPC's appeal. We cannot predict the ultimate outcome of this proceeding, which could have a material effect on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity. If the MoPSC's 2010 electric rate order is ultimately upheld, Ameren Missouri will receive all of the funds held in the Cole County Circuit Court's registry, plus accrued interest. If Ameren Missouri were to conclude that some portion of the rate increase resulting from the 2010 electric rate order was probable of refund to Ameren Missouri's customers, a charge to earnings would be recorded for the estimated amount of refund in the period in which that determination was made. At this time, Ameren Missouri does not believe any aspect of the 2010 MoPSC's electric rate order is probable of refund to Ameren Missouri's customers. Therefore, no reserve has been established.

2011 Electric Rate Order

In July 2011, the MoPSC issued an order approving an increase for Ameren Missouri in annual revenues for electric service of $173 million, including $52 million related to an increase in normalized net fuel costs above the net fuel costs included in base rates previously authorized by the MoPSC in its 2010 electric rate order. The revenue increase was based on a 10.2% return on equity, a capital structure composed of 52.2% common equity, and a rate base of $6.6 billion. The rate changes became effective on July 31, 2011. The MoPSC order approved the continued use of Ameren Missouri's vegetation management and infrastructure cost tracker, its pension and postretirement benefit cost tracker, and the FAC at the current 95% sharing level. The MoPSC order shortened the FAC recovery and refund period from 12 months to eight months. The MoPSC order denied Ameren Missouri's request for the ability to recover any under-recovery of fixed costs as a result of lower sales volumes from the implementation of energy efficiency measures.

Additionally, the MoPSC order provided for a tracking mechanism for uncertain income tax positions. The order provides that reserves for uncertain income tax positions do not reduce rate base. However, when an uncertain income tax position liability is resolved, the order requires the creation of a regulatory asset or regulatory liability to reflect the time value (using the weighted-average cost of capital in the order) of the difference between the uncertain income tax position liability that was excluded from rate base and the final tax liability. The resulting regulatory asset or liability will be amortized over three years beginning on the effective date of new rates established in the next electric rate case.

The MoPSC order disallowed the recovery of all costs of enhancements, or costs that would have been incurred absent the breach, related to the rebuilding of the Taum Sauk energy center in excess of amounts recovered from property insurance. As a result of the order, Ameren and Ameren Missouri each recorded in 2011 a pretax charge to earnings of $89 million relating to the Taum Sauk disallowance. This charge was recorded in Ameren's statement of income as "Goodwill, impairment and other charges" and recorded in Ameren Missouri's statement of income as "Loss from regulatory disallowance."

In July 2011, a new law that reformed the judicial appeal process for MoPSC rate orders took effect. Among other items, the new law allows appeals to bypass the circuit court and to be made directly to the appellate court. The new law provides that rates cannot be stayed; however, the appellate court could direct the MoPSC to revise rates. Such rate revisions could be ordered to be applied retroactively. This new law applied to judicial appeals of the MoPSC's July 2011 rate order.

In August 2011, Ameren Missouri appealed the disallowance of Taum Sauk enhancements to the Missouri Court of Appeals, Western District. A decision is expected by the Missouri Court of Appeals, Western District, in 2012. Ameren Missouri cannot predict the ultimate outcome of its appeal.

Pending Electric Rate Case

On February 3, 2012, Ameren Missouri filed a request with the MoPSC to increase its annual revenues for electric service by $376 million. Included in this requested increase is a $103 million increase in normalized net fuel costs above the net fuel costs included in base rates previously authorized by the MoPSC in its July 2011 electric rate order. Absent initiation of this general rate proceeding, 95% of this amount would have been reflected in rate adjustments implemented under Ameren Missouri's FAC. Approximately $85 million of the request relates to investments to improve the reliability of Ameren Missouri's infrastructure and to comply with environmental and renewable energy regulations, including the requested return on such investments, and $81 million of the request relates to recovery of the costs associated with energy efficiency programs under the MEEIA, including energy efficiency investments, which is discussed below. The electric rate increase request was based on a 10.75% return on equity, a capital structure composed of 52% common equity, an aggregate electric rate base of $6.8 billion, and a test year ended September 30, 2011, with certain pro forma adjustments expected through the anticipated true-up date of July 31, 2012.

As part of its filing, Ameren Missouri requested that the MoPSC approve the implementation of a storm cost tracking mechanism, as well as plant-in-service accounting treatment. The proposed storm cost tracking mechanism would allow Ameren Missouri to record a regulatory asset or liability, as applicable, reflecting the difference between a base level of major storm restoration costs used to set rates in the current rate case and the actual storm restoration costs, and to request recovery of such regulatory asset or liability in Ameren Missouri's next rate case for amortization over a three-year period. The plant-in-service accounting treatment would permit Ameren Missouri to recover a return and to defer depreciation expense on assets placed in service but not yet reflected in customer rates.

Ameren Missouri requested continued use of the FAC and the regulatory tracking mechanisms for vegetation management/infrastructure inspection costs, for pension and postretirement benefits, and for uncertain income tax positions that the MoPSC previously authorized in earlier electric rate orders. Ameren Missouri also requested recovery of the 2011 voluntary separation program severance costs over three years.

A decision by the MoPSC in this proceeding is expected in December 2012. Ameren Missouri cannot predict the level of any electric service rate change the MoPSC may approve, when any rate change may go into effect, or whether any rate increase that may eventually be approved will be sufficient for Ameren Missouri to recover its costs and earn a reasonable return on its investments when the increase goes into effect.

MEEIA Filing

The MEEIA, enacted in 2009, established a regulatory framework that, among other things, allows electric utilities to recover costs related to MoPSC-approved energy efficiency programs. The law requires the MoPSC to ensure that a utility's financial incentives are aligned with helping customers use energy more efficiently, to provide timely cost recovery, and to provide earnings opportunities associated with cost-effective energy efficiency programs. Missouri does not have a law mandating energy efficiency standards.

In January 2012, Ameren Missouri made its initial filing with the MoPSC under the MEEIA. This filing proposes a three-year plan that includes a portfolio of energy efficiency programs along with a cost-recovery mechanism. If the proposal is approved, beginning in January 2013, Ameren Missouri plans to invest $145 million over three years for the proposed energy efficiency programs.

A decision by the MoPSC in this proceeding is anticipated in the second quarter of 2012. The MoPSC's order in this proceeding will not affect Ameren Missouri rates until these rates are included in an electric service rate case. Ameren Missouri anticipates that the impacts of the MoPSC's decision in this MEEIA filing will be included in rates set under its pending electric service rate case that was filed on February 3, 2012, which has an anticipated true-up date of July 31, 2012. Ameren Missouri's pending electric rate case includes an annual revenue increase of $81 million relating to its planned portfolio of energy efficiency programs included in its MEEIA filing.

FAC Prudence Review

Missouri law requires the MoPSC to complete prudence reviews of Ameren Missouri's FAC at least every 18 months. In April 2011, the MoPSC issued an order with respect to its review of Ameren Missouri's FAC for the period from March 1, 2009, to September 30, 2009. In this order, the MoPSC ruled that Ameren Missouri should have included in the FAC calculation all revenues and costs associated with certain long-term partial requirements sales that were made by Ameren Missouri because of the loss of Noranda's load caused by a severe ice storm in January 2009. As a result of the order, Ameren Missouri recorded a pretax charge to earnings of $18 million, including $1 million for interest, in 2011 for its obligation to refund to Ameren Missouri's electric customers the earnings associated with these sales previously recognized by Ameren Missouri during the period from March 1, 2009, to September 30, 2009. In October 2011, Ameren Missouri began refunding the $18 million to customers through the FAC.

Ameren Missouri disagrees with the MoPSC order's classification of these sales and believes that the terms of its FAC tariff did not provide for the inclusion of these sales in the FAC calculation. In June 2011, Ameren Missouri filed an appeal with the Cole County Circuit Court. A decision is expected from the Cole County Circuit Court in 2012. Separately, in July 2011, Ameren Missouri filed a request with the MoPSC for an accounting authority order that would allow Ameren Missouri to defer, as a regulatory asset, fixed costs totaling $36 million that were not recovered from Noranda as a result of the loss of load caused by the severe 2009 ice storm for potential recovery in a future electric rate case. We cannot predict the ultimate outcome of these regulatory or judicial proceedings.

Ameren Missouri recognized an additional $25 million of pretax earnings associated with the same long-term partial requirements sales contracts subsequent to September 30, 2009, which were not addressed by the MoPSC order issued in April 2011. The MoPSC's FAC review for the period from October 1, 2009, to May 31, 2011, was initiated in September 2011. In October 2011, the MoPSC staff filed a recommendation with the MoPSC to direct Ameren Missouri to refund to customers, prior to the completion of the staff's prudence review, the pretax earnings associated with the same long-term partial requirements sales contracts subsequent to September 30, 2009. The MoPSC staff calculated these pretax earnings to be $26 million. We cannot predict whether the MoPSC will approve this recommendation. If Ameren Missouri were to determine that these sales were probable of refund to Ameren Missouri's electric customers, a charge to earnings would be recorded for the refund in the period in which that determination was made. Because of pending court appeals and regulatory review, Ameren Missouri does not currently believe these amounts are probable of refund to customers.

Renewable Energy Portfolio Requirement

A ballot initiative passed by Missouri voters in November 2008 created a renewable energy portfolio requirement. Beginning in 2011, Ameren Missouri and other Missouri investor-owned utilities are required to purchase or generate from renewable energy sources electricity equaling at least 2% of native load sales, with that percentage increasing in subsequent years to at least 15% by 2021, subject to a 1% limit on customer rate impacts. At least 2% of each portfolio requirement must be derived from solar energy. Compliance with the renewable energy portfolio requirement can be achieved through generation or the procurement of renewable energy credits. Ameren Missouri expects that any related costs or investments will ultimately be recovered in rates.

In July 2010, the MoPSC issued final rules implementing the state's renewable energy portfolio requirement. Ameren Missouri objected to the MoPSC rules calculating the 1% limit on customer rates. In August 2010, Ameren Missouri and other groups filed an appeal with the Cole County Circuit Court of multiple aspects of the MoPSC's rules. In December 2011, the Cole County Circuit Court issued a ruling clarifying that the 1% customer rate increase limit is an annual restriction, not a multiyear limit.

Illinois

IEIMA

In October 2011, the IEIMA was enacted into law and became effective immediately. Certain amendments to the IEIMA became effective on December 30, 2011. On January 3, 2012, Ameren Illinois elected to participate in the performance-based formula ratemaking process established pursuant to the IEIMA by filing initial performance-based formula rates with the ICC. With this filing, as required by law, Ameren Illinois' previously pending electric delivery service rate case was withdrawn. The initial filing, based on 2010 recoverable costs and expected net plant additions for 2011 and 2012, will result in new electric delivery service rates in October 2012. Pending ICC approval, the initial filing will result in a decrease of $19 million in Ameren Illinois revenues for electric delivery service, on an annualized basis. Ameren Illinois anticipates making an update filing by May 1, 2012, based on 2011 costs and expected net plant additions for 2012, that would result in new electric delivery service rates on January 1, 2013.

Ameren Illinois will participate in a performance-based formula process for determining rates. The formula will provide for the recovery of actual costs of electric delivery service that are prudently incurred, reflect the utility's actual regulated capital structure, and include a formula for calculating the return on equity component of the cost of capital. The return on equity component of the formula rate will be equal to the average for the applicable calendar year of the monthly average yields of 30-year United States treasury bonds plus 590 basis points for 2012 and 580 basis points thereafter. Ameren Illinois' actual return on equity relating to electric delivery service will be subject to a collar adjustment on earnings in excess of 50 basis points above or below its allowed return. Beginning in 2012, the law provides for an annual reconciliation of revenues to costs prudently and reasonably incurred. This annual revenue reconciliation, along with the collar adjustment, if necessary, will be collected from or refunded to customers in a subsequent year.

Ameren Illinois will also be subject to five performance standards. Failure to achieve the standards will result in a reduction in the company's allowed return on equity calculated under the formula. The performance standards include improvements in service reliability to reduce both the frequency and duration of outages, improvements in customer satisfaction scores, reduction in the number of estimated bills, and a reduction in uncollectible accounts expense. The IEIMA provides for return on equity penalties totaling up to 30 basis points in 2013 through 2015, 34 basis points in 2016 through 2018, and 38 basis points in 2019 through 2022 if the performance standards are not met. The formula ratemaking process is effective until the end of 2017, but could be extended by the Illinois General Assembly for an additional five years. The formula ratemaking process would also terminate if the average residential rate increases by more than 2.5% annually from June 2011 through May 2014.

Between 2012 and 2021, Ameren Illinois will be required to invest $625 million in capital expenditures incremental to Ameren Illinois' average electric delivery capital expenditures for calendar years 2008 through 2010 to modernize its distribution system. Such investments are expected to encourage economic development and to create an estimated 450 additional jobs within Illinois. Ameren Illinois is subject to monetary penalties if 450 additional jobs are not created during the peak program years. Also, Ameren Illinois will be required to contribute $1 million annually for certain nonrecoverable customer assistance programs for as long as Ameren Illinois participates in the formula ratemaking process. Ameren Illinois will also be required to make a one-time $7.5 million nonrecoverable donation to the Illinois Science and Energy Innovation Trust in 2012, as well as an approximate $1 million annual donation to the same trust for as long as it participates in the formula ratemaking process.

The IEIMA does not apply to natural gas utilities.

2012 Natural Gas Delivery Service Rate Order

In January 2012, the ICC issued a rate order that approved an increase in annual Ameren Illinois' revenues for natural gas delivery service of $32 million. The revenue increase was based on a 9.06% return on equity, a capital structure composed of 53.3% common equity, and a rate base of $1 billion. The rate order was based on a 2012 future test year. The rate changes became effective on January 20, 2012.  In February 2012, the ICC denied rehearing requests by Ameren Illinois and an intervenor related to the granted return on equity.

 

2010 Electric and Natural Gas Delivery Service Rate Orders

During 2010, the ICC issued orders that authorized an aggregate $40 million increase in Ameren Illinois' annual electric and natural gas delivery service revenues.

In December 2010, Ameren Illinois and an intervenor appealed portions of the ICC's orders to the Appellate Court of the Fourth District of Illinois. In January 2012, the Appellate Court issued a decision that upheld the ICC's 2010 electric and natural gas delivery service rate order.

Federal

Electric Transmission Investment

FERC, in its order issued in May 2011, approved transmission rate incentives for the Illinois Rivers project and the Big Muddy project, which will be developed by ATXI or ATX. The FERC May 2011 order approved the following rate mechanisms with respect to Ameren's Illinois Rivers and Big Muddy projects:

 

Ÿ  

Full recovery of financing costs, including debt and equity, associated with construction work in progress before the asset is placed in service;

Ÿ  

Recovery of costs prudently incurred in developing project facilities that might later be abandoned due to issues outside the company's control; and

Ÿ  

Use of a hypothetical capital structure during construction that reflects a capital structure of 56% common equity.

In December 2011, MISO approved the Illinois Rivers project as well as the Spoon River and Mark Twain projects. The total investment in these three MISO-approved projects is expected to be more than $1.2 billion through 2019, with potential investment of $750 million from 2012 to 2016. All four projects are in Missouri and Illinois. Construction will begin first on the Illinois Rivers project. The Big Muddy project is currently being evaluated for inclusion in MISO's 2012 expansion plan.

On December 30, 2011, ATXI made a filing with FERC seeking a forward-looking rate calculation with an annual revenue reconciliation adjustment as well as requesting the implementation of the incentives FERC approved in its May 2011 order described above for the Illinois Rivers project and the Big Muddy project. FERC is expected to issue a decision on the ATXI filing during the first quarter of 2012.

2011 Wholesale Distribution Rate Case

In January 2011, Ameren Illinois filed a request with FERC to increase its annual revenues for electric delivery service for its wholesale customers by $11 million. These wholesale distribution revenues are treated as a deduction from Ameren Illinois' revenue requirement in retail rate filings with the ICC. In March 2011, FERC issued an order authorizing the proposed rates to take effect, subject to refund when the final rates are determined. Ameren Illinois reached an agreement with two of its nine wholesale customers in 2011. The impasse with the remaining seven wholesale customers has resulted in FERC litigation. An initial decision by the FERC administrative law judge is expected in 2012 and a final FERC decision may be received after 2012. We cannot predict the ultimate outcome of this proceeding or its impact on Ameren's or Ameren Illinois' results of operations, financial position, or liquidity.

Regional Transmission Organization

Ameren Missouri is a transmission owning member of MISO. Ameren Missouri received authorization from the MoPSC to participate in MISO, subject to certain conditions. Ameren Missouri's continued conditional MISO participation is authorized by the MoPSC through April 30, 2012.

As required by the MoPSC, Ameren Missouri filed in November 2010 and again in August 2011 updated cost benefit studies with the MoPSC that evaluated the costs and benefits of Ameren Missouri's continued participation in MISO. Ameren Missouri's updated studies continue to show substantial benefits to Ameren Missouri customers associated with its participation in MISO.

In November 2011, Ameren Missouri, together with the MoPSC staff, the MIEC, and MISO, filed a Non-Unanimous Stipulation and Agreement (Stipulation) with the MoPSC that reflected their agreement that continued Ameren Missouri participation in MISO through May 31, 2016, was prudent and reasonable, subject to certain conditions. The MoOPC opposes the Stipulation, in part because of its desire that the MoPSC impose conditions relating to ATX's involvement in transmission projects located within Ameren Missouri's service territory. These conditions, which are not included in the Stipulation are, in Ameren Missouri's view, inappropriate and unlawful. Ameren Missouri expects an order from the MoPSC before April 30, 2012.

FERC Order – MISO Charges

Ameren Missouri and Ameren Illinois, as well as other MISO participants, have filed complaints with FERC with respect to the FERC's March 2007 order involving the reallocation of certain MISO operational costs among MISO participants retroactive to 2005. Subsequently, FERC has issued a series of orders related to the applicability and the implementation of the order, which in some cases have conflicted with previous orders.

In May 2009, FERC changed the effective date for refunds such that certain operational costs would be allocated among MISO market participants beginning November 2008, instead of August 2007. In June 2009, Ameren Missouri and Ameren Illinois filed a request for rehearing. The rehearing request is pending.

In June 2009, FERC issued an order dismissing rehearing requests of a November 2008 order and waiving refunds of amounts billed that were included in the MISO charge, under the assumption that there was a rate mismatch for the period April 2006 through November 2007. Ameren Missouri and Ameren Illinois filed a request for rehearing in July 2009. This rehearing request is pending.

Ameren Missouri and Ameren Illinois do not believe that the ultimate resolution of these proceedings will have a material effect on their results of operations, financial position, or liquidity.

Ameren Missouri Power Purchase Agreement with Entergy Arkansas, Inc.

Beginning in 2005, FERC issued a series of orders addressing a complaint filed in 2001 by the Louisiana Public Service Commission (LPSC) against Entergy Arkansas, Inc. (Entergy) and certain of its affiliates. The complaint alleged unjust and unreasonable cost allocations. As a result of the FERC orders, Entergy began billing Ameren Missouri in 2007 for additional charges under a 165-megawatt power purchase agreement, and Ameren Missouri paid those charges. Additional charges continued during the remainder of the term of the power purchase agreement, which expired August 31, 2009. Although Ameren Missouri was not a party to the FERC proceedings that gave rise to these additional charges, Ameren Missouri intervened in related FERC proceedings. Ameren Missouri also filed a complaint with FERC against Entergy and Entergy Services, Inc. in April 2008 to challenge the additional charges. In January 2010, FERC issued a ruling that Entergy may not pass the additional charges on to Ameren Missouri. In February 2010, Entergy filed a request for rehearing of the January 2010 ruling. Ameren Missouri has not recorded any prospective refund for additional charges paid to Entergy as a result of the FERC orders.

The LPSC appealed FERC's orders regarding LPSC's complaint against Entergy Services, Inc. to the United States Court of Appeals for the District of Columbia. In April 2008, that court ordered further FERC proceedings regarding LPSC's complaint. The court ordered FERC to explain its previous denial of retroactive refunds and the implementation of prospective charges. FERC's decision on remand of the retroactive impact of these issues could have a financial impact on Ameren Missouri. Ameren Missouri is unable to predict how FERC will respond to the court's decisions. Ameren Missouri estimates that it could incur an additional expense of up to $25 million if FERC orders retroactive application for the years 2001 to 2005. Ameren Missouri believes that the likelihood of incurring any expense is not probable, and therefore no liability has been recorded as of December 31, 2011. Ameren Missouri plans to participate in any proceeding that FERC initiates to address the court's decisions.

 

COLA and Early Site Permit

In 2008, Ameren Missouri filed an application with the NRC for a COLA for a new 1,600-megawatt nuclear unit at Ameren Missouri's existing Callaway County, Missouri, nuclear energy center site. In 2009, Ameren Missouri suspended its efforts to build a new nuclear unit at its existing Missouri nuclear energy center site, and the NRC suspended review of the COLA.

Ameren Missouri is considering filing an application to obtain an early site permit from the NRC for the Callaway energy center site. An early site permit approves a specific location for a nuclear facility; however, additional licenses would be required for the specific type and design of nuclear facility to be built at that site. An early site permit does not authorize construction of a plant. An early site permit is valid for 20 years and could be renewed for up to an additional 20 years. Attempts to pass legislation to maintain an option for nuclear power in the state of Missouri by recovering the costs of the early site permit, subject to appropriate consumer protections, were not successful during 2011. However, support for nuclear power exists in the state of Missouri, which could lead to the passage of an early site permit recovery mechanism in future legislative sessions. Ameren Missouri's pursuit of an early site permit is dependent upon enactment of a legislative framework ensuring cost recovery.

As of December 31, 2011, Ameren Missouri had capitalized $69 million relating to its efforts to construct a new nuclear unit. All of these incurred costs will remain capitalized while management assesses options to maximize the value of its investment in this project. If efforts are permanently abandoned or management concludes it is probable the costs incurred will be disallowed in rates, a charge to earnings would be recognized in the period in which that determination was made.

Pumped-storage Hydroelectric Energy Center Relicensing

In June 2008, Ameren Missouri filed a relicensing application with FERC to operate its Taum Sauk pumped-storage hydroelectric energy center for another 40 years. The existing FERC license expired on June 30, 2010. On July 2, 2010, Ameren Missouri received a license extension that allows Taum Sauk to continue operations until FERC issues a new license. FERC is reviewing the relicensing application. A FERC order is expected in 2012 or 2013. Ameren Missouri cannot predict the ultimate outcome of the application.

 

Regulatory Assets and Liabilities

In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs pursuant to actions of regulators or based on the expected ability to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts because of actions of regulators or because of the expectation that such amounts will be returned to customers in future rates. The following table presents Ameren's, Ameren Missouri's and Ameren Illinois' regulatory assets and regulatory liabilities at December 31, 2011 and 2010:

 

      2011           2010  
     Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

          Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

 

Current regulatory assets:

                   

Under-recovered FAC(b)(c)

   $ 83       $ 83       $ -         $ 158       $ 158       $ -   

Under-recovered Illinois electric power costs(b)(d)

     4         -         4           4         -         4   

Under-recovered PGA(b)(d)

     8         5         3           2         -         2   

MTM derivative losses(e)

     120         21         299             103         21         254   

Total current regulatory assets

   $ 215       $ 109       $ 306           $ 267       $ 179       $ 260   

Noncurrent regulatory assets:

                   

Pension and postretirement benefit costs(f)

   $ 878       $ 382       $ 496         $ 555       $ 251       $ 304   

Income taxes(g)

     239         234         5           230         225         5   

Asset retirement obligation(h)

     6         -         6           9         3         6   

Callaway costs(b)(i)

     48         48         -           51         51         -   

Unamortized loss on reacquired debt(b)(j)

     47         21         26           53         25         28   

Recoverable costs – contaminated facilities(k)

     102         -         102           127         -         127   

MTM derivative losses(e)

     100         13         87           85         14         249   

SO2 emission allowances sale tracker(l)

     6         6         -           12         12         -   

Storm costs(m)

     16         16         -           23         23         -   

Demand-side costs(n)

     70         70         -           39         39         -   

Reserve for workers' compensation liabilities(o)

     13         7         6           14         8         6   

Credit facilities fees(p)

     10         10         -           12         12         -   

Employee separation costs(q)

     6         3         3           8         6         2   

Common stock issuance costs(r)

     10         10         -           12         12         -   

Construction accounting for pollution control equipment(b)(s)

     25         25         -           4         4         -   

Other(t)

     27         10         17             29         9         20   

Total noncurrent regulatory assets

   $     1,603       $     855       $     748           $     1,263       $     694       $     747   

Current regulatory liabilities:

                   

Over-recovered FAC(u)

   $ 12       $ 12       $ -         $ -       $ -       $ -   

Over-recovered Illinois electric power costs(d)

     66         -         66           62         -         62   

Over-recovered PGA(d)

     9         -         9           12         1         11   

MTM derivative gains(v)

     46         45         1             25         22         3   

Total current regulatory liabilities

   $ 133       $ 57       $ 76           $ 99       $ 23       $ 76   

Noncurrent regulatory liabilities:

                   

Income taxes(w)

   $ 48       $ 44       $ 4         $ 54       $ 48       $ 6   

Removal costs(x)

     1,269         719         550           1,177         655         522   

Asset retirement obligation(h)

     29         29         -           -         -         -   

MTM derivative gains(v)

     82         4         78           20         13         7   

Bad debt rider(y)

     10         -         10           5         -         5   

Pension and postretirement benefit costs tracker(z)

     38         38         -           45         45         -   

Energy efficiency rider(aa)

     24         -         24           13         -         13   

Other(bb)

     2         2         -             5         5         -   

Total noncurrent regulatory liabilities

   $ 1,502       $ 836       $ 666           $ 1,319       $ 766       $ 553   

 

Ameren Missouri and Ameren Illinois continually assess the recoverability of their regulatory assets. Under current accounting standards, regulatory assets are charged to earnings when it is no longer probable that such amounts will be recovered through future revenues. To the extent that payments of regulatory liabilities are no longer probable, the amounts are credited to earnings.

NOTE 2 – RATE AND REGULATORY MATTERS

Below is a summary of significant regulatory proceedings and related lawsuits. We are unable to predict the ultimate outcome of these matters, the timing of the final decisions of the various agencies and courts, or the impact on our results of operations, financial position, or liquidity.

Missouri

2009 Electric Rate Order

In February 2009, Noranda, Ameren Missouri's largest electric customer, and the MoOPC appealed certain aspects of the MoPSC's 2009 electric rate order to the Circuit Court of Stoddard County, Missouri. In September 2009, the Stoddard County Circuit Court granted Noranda's request to stay the electric rate increase granted by the January 2009 MoPSC's order as it applied specifically to Noranda's electric service account until the court rendered its decision on the appeal. From the granting of the stay request until June 2010, Noranda paid into the Stoddard County Circuit Court's registry the entire amount of its monthly base rate increase and monthly FAC payments. In June 2010, when the May 2010 electric rate order became effective, Noranda ceased making base rate payments into the Stoddard County Circuit Court's registry. Noranda continued to pay into the Stoddard County Circuit Court's registry its monthly FAC payments related to electric service received during the time periods prior to the effectiveness of the May 2010 electric rate order.

In August 2010, the Stoddard County Circuit Court issued a judgment that reversed parts of the MoPSC's decision. However, upon issuance, the Stoddard County Circuit Court suspended its own judgment. Ameren Missouri filed an appeal of the Stoddard County Circuit Court's judgment with the Missouri Court of Appeals, Southern District. In November 2011, the Missouri Court of Appeals issued a ruling that upheld the MoPSC's January 2009 electric rate order; thereby reversing the Stoddard County Circuit Court's August 2010 decision. As of December 31, 2011, the amount held in the Stoddard County Circuit Court's registry was $20 million. That amount was reflected in "Accounts receivable-trade" on Ameren's and Ameren Missouri's balance sheets at December 31, 2011. Ameren Missouri expects to receive all of the funds held in the Stoddard County Circuit Court's registry relating to the stay during the first quarter of 2012.

2010 Electric Rate Order

In May 2010, the MoPSC issued an order approving an increase for Ameren Missouri in annual revenues for electric service of $230 million.

The MIEC and MoOPC appealed certain aspects of the MoPSC order to the Cole County Circuit Court. In addition to the MIEC appeal, four industrial customers, who are members of MIEC, also filed a request for a stay with the Cole County Circuit Court. In December 2010, the Cole County Circuit Court granted the request of the four industrial customers to stay the MoPSC's 2010 electric rate order and required those customers to pay into the Cole County Circuit Court's registry the difference between their billings under the 2010 Missouri electric rate order and their billings under a Missouri electric rate order that became effective in June 2007, which was, at that time, the last Ameren Missouri rate order for which appeals had been exhausted. In February 2011, the four industrial customers posted the bond required by the stay. Since the bond was posted, the four industrial customers have made payments into the Cole County Circuit Court's registry equal to the difference between their base rate billings under 2010 electric rates and 2007 electric rates, as well as their FAC amounts to the extent those billings relate to service prior to the effective date of the new rates established by the 2011 electric rate order. Because of the lag between accumulations of changes in net fuel costs and the time those net fuel costs are recovered through FAC charges applied to customers' bills, the four industrial customers will continue to pay a portion of their FAC payments to the Cole County Circuit Court's registry for service prior to the effective date of the new rates by the 2011 electric rate order. It is expected that a portion of the FAC billings invoiced to these customers in September 2012 would be the last contested amount deposited into the Cole County Circuit Court's registry relating to this 2010 electric rate order appeal, pending resolution of the appeal. As of December 31, 2011, the amount held by the Cole County Circuit Court, excluding the bond amount, was $15 million. This amount held in the registry was reflected in "Accounts receivable-trade" on Ameren's and Ameren Missouri's balance sheets at December 31, 2011.

A Cole County Circuit Court decision is expected during the first quarter of 2012 on the MIEC's and MoOPC's appeal. We cannot predict the ultimate outcome of this proceeding, which could have a material effect on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity. If the MoPSC's 2010 electric rate order is ultimately upheld, Ameren Missouri will receive all of the funds held in the Cole County Circuit Court's registry, plus accrued interest. If Ameren Missouri were to conclude that some portion of the rate increase resulting from the 2010 electric rate order was probable of refund to Ameren Missouri's customers, a charge to earnings would be recorded for the estimated amount of refund in the period in which that determination was made. At this time, Ameren Missouri does not believe any aspect of the 2010 MoPSC's electric rate order is probable of refund to Ameren Missouri's customers. Therefore, no reserve has been established.

2011 Electric Rate Order

In July 2011, the MoPSC issued an order approving an increase for Ameren Missouri in annual revenues for electric service of $173 million, including $52 million related to an increase in normalized net fuel costs above the net fuel costs included in base rates previously authorized by the MoPSC in its 2010 electric rate order. The revenue increase was based on a 10.2% return on equity, a capital structure composed of 52.2% common equity, and a rate base of $6.6 billion. The rate changes became effective on July 31, 2011. The MoPSC order approved the continued use of Ameren Missouri's vegetation management and infrastructure cost tracker, its pension and postretirement benefit cost tracker, and the FAC at the current 95% sharing level. The MoPSC order shortened the FAC recovery and refund period from 12 months to eight months. The MoPSC order denied Ameren Missouri's request for the ability to recover any under-recovery of fixed costs as a result of lower sales volumes from the implementation of energy efficiency measures.

Additionally, the MoPSC order provided for a tracking mechanism for uncertain income tax positions. The order provides that reserves for uncertain income tax positions do not reduce rate base. However, when an uncertain income tax position liability is resolved, the order requires the creation of a regulatory asset or regulatory liability to reflect the time value (using the weighted-average cost of capital in the order) of the difference between the uncertain income tax position liability that was excluded from rate base and the final tax liability. The resulting regulatory asset or liability will be amortized over three years beginning on the effective date of new rates established in the next electric rate case.

The MoPSC order disallowed the recovery of all costs of enhancements, or costs that would have been incurred absent the breach, related to the rebuilding of the Taum Sauk energy center in excess of amounts recovered from property insurance. As a result of the order, Ameren and Ameren Missouri each recorded in 2011 a pretax charge to earnings of $89 million relating to the Taum Sauk disallowance. This charge was recorded in Ameren's statement of income as "Goodwill, impairment and other charges" and recorded in Ameren Missouri's statement of income as "Loss from regulatory disallowance."

In July 2011, a new law that reformed the judicial appeal process for MoPSC rate orders took effect. Among other items, the new law allows appeals to bypass the circuit court and to be made directly to the appellate court. The new law provides that rates cannot be stayed; however, the appellate court could direct the MoPSC to revise rates. Such rate revisions could be ordered to be applied retroactively. This new law applied to judicial appeals of the MoPSC's July 2011 rate order.

In August 2011, Ameren Missouri appealed the disallowance of Taum Sauk enhancements to the Missouri Court of Appeals, Western District. A decision is expected by the Missouri Court of Appeals, Western District, in 2012. Ameren Missouri cannot predict the ultimate outcome of its appeal.

Pending Electric Rate Case

On February 3, 2012, Ameren Missouri filed a request with the MoPSC to increase its annual revenues for electric service by $376 million. Included in this requested increase is a $103 million increase in normalized net fuel costs above the net fuel costs included in base rates previously authorized by the MoPSC in its July 2011 electric rate order. Absent initiation of this general rate proceeding, 95% of this amount would have been reflected in rate adjustments implemented under Ameren Missouri's FAC. Approximately $85 million of the request relates to investments to improve the reliability of Ameren Missouri's infrastructure and to comply with environmental and renewable energy regulations, including the requested return on such investments, and $81 million of the request relates to recovery of the costs associated with energy efficiency programs under the MEEIA, including energy efficiency investments, which is discussed below. The electric rate increase request was based on a 10.75% return on equity, a capital structure composed of 52% common equity, an aggregate electric rate base of $6.8 billion, and a test year ended September 30, 2011, with certain pro forma adjustments expected through the anticipated true-up date of July 31, 2012.

As part of its filing, Ameren Missouri requested that the MoPSC approve the implementation of a storm cost tracking mechanism, as well as plant-in-service accounting treatment. The proposed storm cost tracking mechanism would allow Ameren Missouri to record a regulatory asset or liability, as applicable, reflecting the difference between a base level of major storm restoration costs used to set rates in the current rate case and the actual storm restoration costs, and to request recovery of such regulatory asset or liability in Ameren Missouri's next rate case for amortization over a three-year period. The plant-in-service accounting treatment would permit Ameren Missouri to recover a return and to defer depreciation expense on assets placed in service but not yet reflected in customer rates.

Ameren Missouri requested continued use of the FAC and the regulatory tracking mechanisms for vegetation management/infrastructure inspection costs, for pension and postretirement benefits, and for uncertain income tax positions that the MoPSC previously authorized in earlier electric rate orders. Ameren Missouri also requested recovery of the 2011 voluntary separation program severance costs over three years.

A decision by the MoPSC in this proceeding is expected in December 2012. Ameren Missouri cannot predict the level of any electric service rate change the MoPSC may approve, when any rate change may go into effect, or whether any rate increase that may eventually be approved will be sufficient for Ameren Missouri to recover its costs and earn a reasonable return on its investments when the increase goes into effect.

MEEIA Filing

The MEEIA, enacted in 2009, established a regulatory framework that, among other things, allows electric utilities to recover costs related to MoPSC-approved energy efficiency programs. The law requires the MoPSC to ensure that a utility's financial incentives are aligned with helping customers use energy more efficiently, to provide timely cost recovery, and to provide earnings opportunities associated with cost-effective energy efficiency programs. Missouri does not have a law mandating energy efficiency standards.

In January 2012, Ameren Missouri made its initial filing with the MoPSC under the MEEIA. This filing proposes a three-year plan that includes a portfolio of energy efficiency programs along with a cost-recovery mechanism. If the proposal is approved, beginning in January 2013, Ameren Missouri plans to invest $145 million over three years for the proposed energy efficiency programs.

A decision by the MoPSC in this proceeding is anticipated in the second quarter of 2012. The MoPSC's order in this proceeding will not affect Ameren Missouri rates until these rates are included in an electric service rate case. Ameren Missouri anticipates that the impacts of the MoPSC's decision in this MEEIA filing will be included in rates set under its pending electric service rate case that was filed on February 3, 2012, which has an anticipated true-up date of July 31, 2012. Ameren Missouri's pending electric rate case includes an annual revenue increase of $81 million relating to its planned portfolio of energy efficiency programs included in its MEEIA filing.

FAC Prudence Review

Missouri law requires the MoPSC to complete prudence reviews of Ameren Missouri's FAC at least every 18 months. In April 2011, the MoPSC issued an order with respect to its review of Ameren Missouri's FAC for the period from March 1, 2009, to September 30, 2009. In this order, the MoPSC ruled that Ameren Missouri should have included in the FAC calculation all revenues and costs associated with certain long-term partial requirements sales that were made by Ameren Missouri because of the loss of Noranda's load caused by a severe ice storm in January 2009. As a result of the order, Ameren Missouri recorded a pretax charge to earnings of $18 million, including $1 million for interest, in 2011 for its obligation to refund to Ameren Missouri's electric customers the earnings associated with these sales previously recognized by Ameren Missouri during the period from March 1, 2009, to September 30, 2009. In October 2011, Ameren Missouri began refunding the $18 million to customers through the FAC.

Ameren Missouri disagrees with the MoPSC order's classification of these sales and believes that the terms of its FAC tariff did not provide for the inclusion of these sales in the FAC calculation. In June 2011, Ameren Missouri filed an appeal with the Cole County Circuit Court. A decision is expected from the Cole County Circuit Court in 2012. Separately, in July 2011, Ameren Missouri filed a request with the MoPSC for an accounting authority order that would allow Ameren Missouri to defer, as a regulatory asset, fixed costs totaling $36 million that were not recovered from Noranda as a result of the loss of load caused by the severe 2009 ice storm for potential recovery in a future electric rate case. We cannot predict the ultimate outcome of these regulatory or judicial proceedings.

Ameren Missouri recognized an additional $25 million of pretax earnings associated with the same long-term partial requirements sales contracts subsequent to September 30, 2009, which were not addressed by the MoPSC order issued in April 2011. The MoPSC's FAC review for the period from October 1, 2009, to May 31, 2011, was initiated in September 2011. In October 2011, the MoPSC staff filed a recommendation with the MoPSC to direct Ameren Missouri to refund to customers, prior to the completion of the staff's prudence review, the pretax earnings associated with the same long-term partial requirements sales contracts subsequent to September 30, 2009. The MoPSC staff calculated these pretax earnings to be $26 million. We cannot predict whether the MoPSC will approve this recommendation. If Ameren Missouri were to determine that these sales were probable of refund to Ameren Missouri's electric customers, a charge to earnings would be recorded for the refund in the period in which that determination was made. Because of pending court appeals and regulatory review, Ameren Missouri does not currently believe these amounts are probable of refund to customers.

Renewable Energy Portfolio Requirement

A ballot initiative passed by Missouri voters in November 2008 created a renewable energy portfolio requirement. Beginning in 2011, Ameren Missouri and other Missouri investor-owned utilities are required to purchase or generate from renewable energy sources electricity equaling at least 2% of native load sales, with that percentage increasing in subsequent years to at least 15% by 2021, subject to a 1% limit on customer rate impacts. At least 2% of each portfolio requirement must be derived from solar energy. Compliance with the renewable energy portfolio requirement can be achieved through generation or the procurement of renewable energy credits. Ameren Missouri expects that any related costs or investments will ultimately be recovered in rates.

In July 2010, the MoPSC issued final rules implementing the state's renewable energy portfolio requirement. Ameren Missouri objected to the MoPSC rules calculating the 1% limit on customer rates. In August 2010, Ameren Missouri and other groups filed an appeal with the Cole County Circuit Court of multiple aspects of the MoPSC's rules. In December 2011, the Cole County Circuit Court issued a ruling clarifying that the 1% customer rate increase limit is an annual restriction, not a multiyear limit.

Illinois

IEIMA

In October 2011, the IEIMA was enacted into law and became effective immediately. Certain amendments to the IEIMA became effective on December 30, 2011. On January 3, 2012, Ameren Illinois elected to participate in the performance-based formula ratemaking process established pursuant to the IEIMA by filing initial performance-based formula rates with the ICC. With this filing, as required by law, Ameren Illinois' previously pending electric delivery service rate case was withdrawn. The initial filing, based on 2010 recoverable costs and expected net plant additions for 2011 and 2012, will result in new electric delivery service rates in October 2012. Pending ICC approval, the initial filing will result in a decrease of $19 million in Ameren Illinois revenues for electric delivery service, on an annualized basis. Ameren Illinois anticipates making an update filing by May 1, 2012, based on 2011 costs and expected net plant additions for 2012, that would result in new electric delivery service rates on January 1, 2013.

Ameren Illinois will participate in a performance-based formula process for determining rates. The formula will provide for the recovery of actual costs of electric delivery service that are prudently incurred, reflect the utility's actual regulated capital structure, and include a formula for calculating the return on equity component of the cost of capital. The return on equity component of the formula rate will be equal to the average for the applicable calendar year of the monthly average yields of 30-year United States treasury bonds plus 590 basis points for 2012 and 580 basis points thereafter. Ameren Illinois' actual return on equity relating to electric delivery service will be subject to a collar adjustment on earnings in excess of 50 basis points above or below its allowed return. Beginning in 2012, the law provides for an annual reconciliation of revenues to costs prudently and reasonably incurred. This annual revenue reconciliation, along with the collar adjustment, if necessary, will be collected from or refunded to customers in a subsequent year.

Ameren Illinois will also be subject to five performance standards. Failure to achieve the standards will result in a reduction in the company's allowed return on equity calculated under the formula. The performance standards include improvements in service reliability to reduce both the frequency and duration of outages, improvements in customer satisfaction scores, reduction in the number of estimated bills, and a reduction in uncollectible accounts expense. The IEIMA provides for return on equity penalties totaling up to 30 basis points in 2013 through 2015, 34 basis points in 2016 through 2018, and 38 basis points in 2019 through 2022 if the performance standards are not met. The formula ratemaking process is effective until the end of 2017, but could be extended by the Illinois General Assembly for an additional five years. The formula ratemaking process would also terminate if the average residential rate increases by more than 2.5% annually from June 2011 through May 2014.

Between 2012 and 2021, Ameren Illinois will be required to invest $625 million in capital expenditures incremental to Ameren Illinois' average electric delivery capital expenditures for calendar years 2008 through 2010 to modernize its distribution system. Such investments are expected to encourage economic development and to create an estimated 450 additional jobs within Illinois. Ameren Illinois is subject to monetary penalties if 450 additional jobs are not created during the peak program years. Also, Ameren Illinois will be required to contribute $1 million annually for certain nonrecoverable customer assistance programs for as long as Ameren Illinois participates in the formula ratemaking process. Ameren Illinois will also be required to make a one-time $7.5 million nonrecoverable donation to the Illinois Science and Energy Innovation Trust in 2012, as well as an approximate $1 million annual donation to the same trust for as long as it participates in the formula ratemaking process.

The IEIMA does not apply to natural gas utilities.

2012 Natural Gas Delivery Service Rate Order

In January 2012, the ICC issued a rate order that approved an increase in annual Ameren Illinois' revenues for natural gas delivery service of $32 million. The revenue increase was based on a 9.06% return on equity, a capital structure composed of 53.3% common equity, and a rate base of $1 billion. The rate order was based on a 2012 future test year. The rate changes became effective on January 20, 2012.  In February 2012, the ICC denied rehearing requests by Ameren Illinois and an intervenor related to the granted return on equity.

 

2010 Electric and Natural Gas Delivery Service Rate Orders

During 2010, the ICC issued orders that authorized an aggregate $40 million increase in Ameren Illinois' annual electric and natural gas delivery service revenues.

In December 2010, Ameren Illinois and an intervenor appealed portions of the ICC's orders to the Appellate Court of the Fourth District of Illinois. In January 2012, the Appellate Court issued a decision that upheld the ICC's 2010 electric and natural gas delivery service rate order.

Federal

Electric Transmission Investment

FERC, in its order issued in May 2011, approved transmission rate incentives for the Illinois Rivers project and the Big Muddy project, which will be developed by ATXI or ATX. The FERC May 2011 order approved the following rate mechanisms with respect to Ameren's Illinois Rivers and Big Muddy projects:

 

Ÿ  

Full recovery of financing costs, including debt and equity, associated with construction work in progress before the asset is placed in service;

Ÿ  

Recovery of costs prudently incurred in developing project facilities that might later be abandoned due to issues outside the company's control; and

Ÿ  

Use of a hypothetical capital structure during construction that reflects a capital structure of 56% common equity.

In December 2011, MISO approved the Illinois Rivers project as well as the Spoon River and Mark Twain projects. The total investment in these three MISO-approved projects is expected to be more than $1.2 billion through 2019, with potential investment of $750 million from 2012 to 2016. All four projects are in Missouri and Illinois. Construction will begin first on the Illinois Rivers project. The Big Muddy project is currently being evaluated for inclusion in MISO's 2012 expansion plan.

On December 30, 2011, ATXI made a filing with FERC seeking a forward-looking rate calculation with an annual revenue reconciliation adjustment as well as requesting the implementation of the incentives FERC approved in its May 2011 order described above for the Illinois Rivers project and the Big Muddy project. FERC is expected to issue a decision on the ATXI filing during the first quarter of 2012.

2011 Wholesale Distribution Rate Case

In January 2011, Ameren Illinois filed a request with FERC to increase its annual revenues for electric delivery service for its wholesale customers by $11 million. These wholesale distribution revenues are treated as a deduction from Ameren Illinois' revenue requirement in retail rate filings with the ICC. In March 2011, FERC issued an order authorizing the proposed rates to take effect, subject to refund when the final rates are determined. Ameren Illinois reached an agreement with two of its nine wholesale customers in 2011. The impasse with the remaining seven wholesale customers has resulted in FERC litigation. An initial decision by the FERC administrative law judge is expected in 2012 and a final FERC decision may be received after 2012. We cannot predict the ultimate outcome of this proceeding or its impact on Ameren's or Ameren Illinois' results of operations, financial position, or liquidity.

Regional Transmission Organization

Ameren Missouri is a transmission owning member of MISO. Ameren Missouri received authorization from the MoPSC to participate in MISO, subject to certain conditions. Ameren Missouri's continued conditional MISO participation is authorized by the MoPSC through April 30, 2012.

As required by the MoPSC, Ameren Missouri filed in November 2010 and again in August 2011 updated cost benefit studies with the MoPSC that evaluated the costs and benefits of Ameren Missouri's continued participation in MISO. Ameren Missouri's updated studies continue to show substantial benefits to Ameren Missouri customers associated with its participation in MISO.

In November 2011, Ameren Missouri, together with the MoPSC staff, the MIEC, and MISO, filed a Non-Unanimous Stipulation and Agreement (Stipulation) with the MoPSC that reflected their agreement that continued Ameren Missouri participation in MISO through May 31, 2016, was prudent and reasonable, subject to certain conditions. The MoOPC opposes the Stipulation, in part because of its desire that the MoPSC impose conditions relating to ATX's involvement in transmission projects located within Ameren Missouri's service territory. These conditions, which are not included in the Stipulation are, in Ameren Missouri's view, inappropriate and unlawful. Ameren Missouri expects an order from the MoPSC before April 30, 2012.

FERC Order – MISO Charges

Ameren Missouri and Ameren Illinois, as well as other MISO participants, have filed complaints with FERC with respect to the FERC's March 2007 order involving the reallocation of certain MISO operational costs among MISO participants retroactive to 2005. Subsequently, FERC has issued a series of orders related to the applicability and the implementation of the order, which in some cases have conflicted with previous orders.

In May 2009, FERC changed the effective date for refunds such that certain operational costs would be allocated among MISO market participants beginning November 2008, instead of August 2007. In June 2009, Ameren Missouri and Ameren Illinois filed a request for rehearing. The rehearing request is pending.

In June 2009, FERC issued an order dismissing rehearing requests of a November 2008 order and waiving refunds of amounts billed that were included in the MISO charge, under the assumption that there was a rate mismatch for the period April 2006 through November 2007. Ameren Missouri and Ameren Illinois filed a request for rehearing in July 2009. This rehearing request is pending.

Ameren Missouri and Ameren Illinois do not believe that the ultimate resolution of these proceedings will have a material effect on their results of operations, financial position, or liquidity.

Ameren Missouri Power Purchase Agreement with Entergy Arkansas, Inc.

Beginning in 2005, FERC issued a series of orders addressing a complaint filed in 2001 by the Louisiana Public Service Commission (LPSC) against Entergy Arkansas, Inc. (Entergy) and certain of its affiliates. The complaint alleged unjust and unreasonable cost allocations. As a result of the FERC orders, Entergy began billing Ameren Missouri in 2007 for additional charges under a 165-megawatt power purchase agreement, and Ameren Missouri paid those charges. Additional charges continued during the remainder of the term of the power purchase agreement, which expired August 31, 2009. Although Ameren Missouri was not a party to the FERC proceedings that gave rise to these additional charges, Ameren Missouri intervened in related FERC proceedings. Ameren Missouri also filed a complaint with FERC against Entergy and Entergy Services, Inc. in April 2008 to challenge the additional charges. In January 2010, FERC issued a ruling that Entergy may not pass the additional charges on to Ameren Missouri. In February 2010, Entergy filed a request for rehearing of the January 2010 ruling. Ameren Missouri has not recorded any prospective refund for additional charges paid to Entergy as a result of the FERC orders.

The LPSC appealed FERC's orders regarding LPSC's complaint against Entergy Services, Inc. to the United States Court of Appeals for the District of Columbia. In April 2008, that court ordered further FERC proceedings regarding LPSC's complaint. The court ordered FERC to explain its previous denial of retroactive refunds and the implementation of prospective charges. FERC's decision on remand of the retroactive impact of these issues could have a financial impact on Ameren Missouri. Ameren Missouri is unable to predict how FERC will respond to the court's decisions. Ameren Missouri estimates that it could incur an additional expense of up to $25 million if FERC orders retroactive application for the years 2001 to 2005. Ameren Missouri believes that the likelihood of incurring any expense is not probable, and therefore no liability has been recorded as of December 31, 2011. Ameren Missouri plans to participate in any proceeding that FERC initiates to address the court's decisions.

 

COLA and Early Site Permit

In 2008, Ameren Missouri filed an application with the NRC for a COLA for a new 1,600-megawatt nuclear unit at Ameren Missouri's existing Callaway County, Missouri, nuclear energy center site. In 2009, Ameren Missouri suspended its efforts to build a new nuclear unit at its existing Missouri nuclear energy center site, and the NRC suspended review of the COLA.

Ameren Missouri is considering filing an application to obtain an early site permit from the NRC for the Callaway energy center site. An early site permit approves a specific location for a nuclear facility; however, additional licenses would be required for the specific type and design of nuclear facility to be built at that site. An early site permit does not authorize construction of a plant. An early site permit is valid for 20 years and could be renewed for up to an additional 20 years. Attempts to pass legislation to maintain an option for nuclear power in the state of Missouri by recovering the costs of the early site permit, subject to appropriate consumer protections, were not successful during 2011. However, support for nuclear power exists in the state of Missouri, which could lead to the passage of an early site permit recovery mechanism in future legislative sessions. Ameren Missouri's pursuit of an early site permit is dependent upon enactment of a legislative framework ensuring cost recovery.

As of December 31, 2011, Ameren Missouri had capitalized $69 million relating to its efforts to construct a new nuclear unit. All of these incurred costs will remain capitalized while management assesses options to maximize the value of its investment in this project. If efforts are permanently abandoned or management concludes it is probable the costs incurred will be disallowed in rates, a charge to earnings would be recognized in the period in which that determination was made.

Pumped-storage Hydroelectric Energy Center Relicensing

In June 2008, Ameren Missouri filed a relicensing application with FERC to operate its Taum Sauk pumped-storage hydroelectric energy center for another 40 years. The existing FERC license expired on June 30, 2010. On July 2, 2010, Ameren Missouri received a license extension that allows Taum Sauk to continue operations until FERC issues a new license. FERC is reviewing the relicensing application. A FERC order is expected in 2012 or 2013. Ameren Missouri cannot predict the ultimate outcome of the application.

 

Regulatory Assets and Liabilities

In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs pursuant to actions of regulators or based on the expected ability to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts because of actions of regulators or because of the expectation that such amounts will be returned to customers in future rates. The following table presents Ameren's, Ameren Missouri's and Ameren Illinois' regulatory assets and regulatory liabilities at December 31, 2011 and 2010:

 

      2011           2010  
     Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

          Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

 

Current regulatory assets:

                   

Under-recovered FAC(b)(c)

   $ 83       $ 83       $ -         $ 158       $ 158       $ -   

Under-recovered Illinois electric power costs(b)(d)

     4         -         4           4         -         4   

Under-recovered PGA(b)(d)

     8         5         3           2         -         2   

MTM derivative losses(e)

     120         21         299             103         21         254   

Total current regulatory assets

   $ 215       $ 109       $ 306           $ 267       $ 179       $ 260   

Noncurrent regulatory assets:

                   

Pension and postretirement benefit costs(f)

   $ 878       $ 382       $ 496         $ 555       $ 251       $ 304   

Income taxes(g)

     239         234         5           230         225         5   

Asset retirement obligation(h)

     6         -         6           9         3         6   

Callaway costs(b)(i)

     48         48         -           51         51         -   

Unamortized loss on reacquired debt(b)(j)

     47         21         26           53         25         28   

Recoverable costs – contaminated facilities(k)

     102         -         102           127         -         127   

MTM derivative losses(e)

     100         13         87           85         14         249   

SO2 emission allowances sale tracker(l)

     6         6         -           12         12         -   

Storm costs(m)

     16         16         -           23         23         -   

Demand-side costs(n)

     70         70         -           39         39         -   

Reserve for workers' compensation liabilities(o)

     13         7         6           14         8         6   

Credit facilities fees(p)

     10         10         -           12         12         -   

Employee separation costs(q)

     6         3         3           8         6         2   

Common stock issuance costs(r)

     10         10         -           12         12         -   

Construction accounting for pollution control equipment(b)(s)

     25         25         -           4         4         -   

Other(t)

     27         10         17             29         9         20   

Total noncurrent regulatory assets

   $     1,603       $     855       $     748           $     1,263       $     694       $     747   

Current regulatory liabilities:

                   

Over-recovered FAC(u)

   $ 12       $ 12       $ -         $ -       $ -       $ -   

Over-recovered Illinois electric power costs(d)

     66         -         66           62         -         62   

Over-recovered PGA(d)

     9         -         9           12         1         11   

MTM derivative gains(v)

     46         45         1             25         22         3   

Total current regulatory liabilities

   $ 133       $ 57       $ 76           $ 99       $ 23       $ 76   

Noncurrent regulatory liabilities:

                   

Income taxes(w)

   $ 48       $ 44       $ 4         $ 54       $ 48       $ 6   

Removal costs(x)

     1,269         719         550           1,177         655         522   

Asset retirement obligation(h)

     29         29         -           -         -         -   

MTM derivative gains(v)

     82         4         78           20         13         7   

Bad debt rider(y)

     10         -         10           5         -         5   

Pension and postretirement benefit costs tracker(z)

     38         38         -           45         45         -   

Energy efficiency rider(aa)

     24         -         24           13         -         13   

Other(bb)

     2         2         -             5         5         -   

Total noncurrent regulatory liabilities

   $ 1,502       $ 836       $ 666           $ 1,319       $ 766       $ 553   

 

(a) Includes intercompany eliminations.
(b) These assets earn a return.
(c) Under-recovered fuel costs for periods from July 2009 through December 2011. Specific accumulation periods aggregate the under-recovered costs over four months, any related adjustments occur over the following four months, and then recovery from customers occurs over the next eight months.
(d) Costs under- or over-recovered from utility customers. Amounts will be recovered from, or refunded to, customers within one year of the deferral.
(e) Deferral of commodity-related derivative MTM losses, as well as the MTM losses on financial contracts entered into by Ameren Illinois with Marketing Company.
(f) These costs are being amortized in proportion to the recognition of prior service costs (credits), transition obligations (assets), and actuarial losses (gains) attributable to Ameren's pension plan and postretirement benefit plans. See Note 11 – Retirement Benefits for additional information.
(g) Offset to certain deferred tax liabilities for expected recovery of future income taxes when paid. See Note 13 – Income Taxes for amortization period.
(h) Recoverable or refundable removal costs for AROs at our rate-regulated operations, including net realized and unrealized gains and losses related to the nuclear decommissioning trust fund investments. See Note 1 – Summary of Significant Accounting Policies – Asset Retirement Obligations.
(i) Ameren Missouri's Callaway energy center operations and maintenance expenses, property taxes, and carrying costs incurred between the plant in-service date and the date the plant was reflected in rates. These costs are being amortized over the remaining life of the plant's current operating license (through 2024).
(j) Losses related to reacquired debt. These amounts are being amortized over the lives of the related new debt issuances or the remaining lives of the old debt issuances if no new debt was issued.
(k) The recoverable portion of accrued environmental site liabilities, primarily collected from electric and natural gas customers through ICC-approved cost recovery riders. The period of recovery will depend on the timing of actual expenditures. See Note 15 – Commitments and Contingencies for additional information.
(l)

A regulatory tracking mechanism for gains on sales of SO2 emission allowances, net of SO2 premiums incurred under the terms of coal procurement contracts, plus any SO2 discounts received under such contracts, as approved in a MoPSC order. The MoPSC's May 2010 electric rate order discontinued any future deferrals under this tracking mechanism. The MoPSC's July 2011 rate order approved the amortization of these costs through July 2013.

(m) Actual storm costs in a test year that exceed the MoPSC staff's normalized storm costs for rate purposes. The 2006 storm costs are being amortized until July 2013. The 2008 storm costs are being amortized over five years, beginning on March 1, 2009. In addition, the balance includes January 2007 ice storm costs that Ameren Missouri will recover over five years, beginning in March 2009, as approved by the January 2009 MoPSC electric rate order. The 2009 storm costs are being amortized over five years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order.
(n) Demand-side costs, including the costs of developing, implementing and evaluating customer energy efficiency and demand response programs. Costs incurred from May 2008 through September 2008 are being amortized over 10 years, beginning in March 2009. Costs incurred from October 2008 through December 2009 are being amortized over six years, beginning in July 2010. Costs incurred from January 2010 through February 2011 are being amortized over six years, beginning in August 2011. The amortization period for the costs incurred after February 2011 will be determined in Ameren Missouri's pending electric rate case.
(o) Reserve for workers' compensation claims.
(p) Ameren Missouri's costs incurred to enter into and maintain the 2009 multiyear and supplemental credit agreements, prior to their termination in 2010. These costs are being amortized over two years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order. These costs are being amortized to construction work in progress, which will be subsequently depreciated when assets are placed into service.
(q) Cost incurred for the voluntary and involuntary separation programs. The 2009 Ameren Missouri-related costs are being amortized over three years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order. The 2009 Ameren Illinois-related costs are being amortized over three years, beginning in May 2010, as approved by the April 2010 ICC electric and natural gas rate order.
(r) The MoPSC's May 2010 electric rate order allowed Ameren Missouri to recover its portion of Ameren's September 2009 common stock issuance costs. These costs are being amortized over five years, beginning in July 2010.
(s) The MoPSC's May 2010 electric rate order allowed Ameren Missouri to continue recording an allowance for funds used during construction for pollution control equipment at its Sioux energy center until the cost of that equipment is placed in customer rates. The amortization of these costs will be over the expected life of the Sioux energy center.
(t) Includes costs related to Ameren Illinois' delivery service rate cases that resulted in orders in 2008 and 2010 as well as the natural gas delivery service rate case that resulted in an order in January 2012. The natural gas costs associated with the 2008 rate case will be amortized until September 2013. The 2010 rate case costs are being amortized over a two-year period, beginning in May 2010. The 2012 natural gas rate case costs will be amortized over a two year period, beginning in January 2012. The Ameren Illinois total also includes a portion of the unamortized debt fair value adjustment recorded upon Ameren's acquisition of IP. This portion is being amortized over the remaining life of the related debt, beginning with the expiration of the electric rate freeze in Illinois on January 1, 2007. The Ameren Illinois total also includes Ameren Illinois Merger integration and optimization costs. These costs will be amortized over four years, beginning in January 2012. At Ameren Missouri, the balance includes cost associated with the retirement of renewable energy credits and solar rebates to fulfill Ameren Missouri's renewable energy portfolio requirement. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case. The Ameren Missouri balance also includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2011 through December 2011 were more than the amount allowed in base rates. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case.
(u) Over-recovered fuel costs from March 2009 through September 2009 as ordered by the MoPSC in April 2011. Customer refunds will conclude in May 2012.
(v) Deferral of commodity-related derivative MTM gains.
(w) Unamortized portion of investment tax credit and federal excess deferred taxes. See Note 13 – Income Taxes for amortization period.
(x) Estimated funds collected for the eventual dismantling and removal of plant from service, net of salvage value, upon retirement related to our rate-regulated operations. See discussion in Note 1 – Summary of Significant Accounting Policies – Asset Retirement Obligations.
(y) A regulatory tracking mechanism for the difference between the level of bad debt expense incurred by Ameren Illinois under GAAP and the level of such costs included in electric and natural gas rates. The over-recovery relating to 2010 is being refunded to customers from June 2011 through May 2012. The over-recovery relating to 2011 will be refunded to customers from June 2012 through May 2013.
(z)

A regulatory tracking mechanism for the difference between the level of pension and postretirement benefit costs incurred by Ameren Missouri under GAAP and the level of such costs built into electric rates. The 2008 costs are being amortized through February 2014. The 2009 costs are being amortized through June 2015. The 2010 costs assigned to the natural gas and electric businesses are being amortized through February 2016 and July 2016, respectively. The 2011 costs will be determined in Ameren Missouri's pending electric rate case.

(aa) A regulatory tracking mechanism that allows Ameren Illinois to recover its electric and natural gas costs associated with developing, implementing and evaluating customer energy efficiency and demand response programs. This over-recovery will be refunded to customers over the following 12 months after the plan year.
(bb) Balance includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2010 through February 2011 were less than the amount allowed in base rates. The over-recovery incurred during that time period is being amortized over three years beginning in August 2011. The balance also includes the deferral of gains on emission allowance vintage swaps Ameren Missouri entered into during 2005. The balance of this gain was immaterial at the end of 2011.

Ameren Missouri and Ameren Illinois continually assess the recoverability of their regulatory assets. Under current accounting standards, regulatory assets are charged to earnings when it is no longer probable that such amounts will be recovered through future revenues. To the extent that payments of regulatory liabilities are no longer probable, the amounts are credited to earnings.

NOTE 2 – RATE AND REGULATORY MATTERS

Below is a summary of significant regulatory proceedings and related lawsuits. We are unable to predict the ultimate outcome of these matters, the timing of the final decisions of the various agencies and courts, or the impact on our results of operations, financial position, or liquidity.

Missouri

2009 Electric Rate Order

In February 2009, Noranda, Ameren Missouri's largest electric customer, and the MoOPC appealed certain aspects of the MoPSC's 2009 electric rate order to the Circuit Court of Stoddard County, Missouri. In September 2009, the Stoddard County Circuit Court granted Noranda's request to stay the electric rate increase granted by the January 2009 MoPSC's order as it applied specifically to Noranda's electric service account until the court rendered its decision on the appeal. From the granting of the stay request until June 2010, Noranda paid into the Stoddard County Circuit Court's registry the entire amount of its monthly base rate increase and monthly FAC payments. In June 2010, when the May 2010 electric rate order became effective, Noranda ceased making base rate payments into the Stoddard County Circuit Court's registry. Noranda continued to pay into the Stoddard County Circuit Court's registry its monthly FAC payments related to electric service received during the time periods prior to the effectiveness of the May 2010 electric rate order.

In August 2010, the Stoddard County Circuit Court issued a judgment that reversed parts of the MoPSC's decision. However, upon issuance, the Stoddard County Circuit Court suspended its own judgment. Ameren Missouri filed an appeal of the Stoddard County Circuit Court's judgment with the Missouri Court of Appeals, Southern District. In November 2011, the Missouri Court of Appeals issued a ruling that upheld the MoPSC's January 2009 electric rate order; thereby reversing the Stoddard County Circuit Court's August 2010 decision. As of December 31, 2011, the amount held in the Stoddard County Circuit Court's registry was $20 million. That amount was reflected in "Accounts receivable-trade" on Ameren's and Ameren Missouri's balance sheets at December 31, 2011. Ameren Missouri expects to receive all of the funds held in the Stoddard County Circuit Court's registry relating to the stay during the first quarter of 2012.

2010 Electric Rate Order

In May 2010, the MoPSC issued an order approving an increase for Ameren Missouri in annual revenues for electric service of $230 million.

The MIEC and MoOPC appealed certain aspects of the MoPSC order to the Cole County Circuit Court. In addition to the MIEC appeal, four industrial customers, who are members of MIEC, also filed a request for a stay with the Cole County Circuit Court. In December 2010, the Cole County Circuit Court granted the request of the four industrial customers to stay the MoPSC's 2010 electric rate order and required those customers to pay into the Cole County Circuit Court's registry the difference between their billings under the 2010 Missouri electric rate order and their billings under a Missouri electric rate order that became effective in June 2007, which was, at that time, the last Ameren Missouri rate order for which appeals had been exhausted. In February 2011, the four industrial customers posted the bond required by the stay. Since the bond was posted, the four industrial customers have made payments into the Cole County Circuit Court's registry equal to the difference between their base rate billings under 2010 electric rates and 2007 electric rates, as well as their FAC amounts to the extent those billings relate to service prior to the effective date of the new rates established by the 2011 electric rate order. Because of the lag between accumulations of changes in net fuel costs and the time those net fuel costs are recovered through FAC charges applied to customers' bills, the four industrial customers will continue to pay a portion of their FAC payments to the Cole County Circuit Court's registry for service prior to the effective date of the new rates by the 2011 electric rate order. It is expected that a portion of the FAC billings invoiced to these customers in September 2012 would be the last contested amount deposited into the Cole County Circuit Court's registry relating to this 2010 electric rate order appeal, pending resolution of the appeal. As of December 31, 2011, the amount held by the Cole County Circuit Court, excluding the bond amount, was $15 million. This amount held in the registry was reflected in "Accounts receivable-trade" on Ameren's and Ameren Missouri's balance sheets at December 31, 2011.

A Cole County Circuit Court decision is expected during the first quarter of 2012 on the MIEC's and MoOPC's appeal. We cannot predict the ultimate outcome of this proceeding, which could have a material effect on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity. If the MoPSC's 2010 electric rate order is ultimately upheld, Ameren Missouri will receive all of the funds held in the Cole County Circuit Court's registry, plus accrued interest. If Ameren Missouri were to conclude that some portion of the rate increase resulting from the 2010 electric rate order was probable of refund to Ameren Missouri's customers, a charge to earnings would be recorded for the estimated amount of refund in the period in which that determination was made. At this time, Ameren Missouri does not believe any aspect of the 2010 MoPSC's electric rate order is probable of refund to Ameren Missouri's customers. Therefore, no reserve has been established.

2011 Electric Rate Order

In July 2011, the MoPSC issued an order approving an increase for Ameren Missouri in annual revenues for electric service of $173 million, including $52 million related to an increase in normalized net fuel costs above the net fuel costs included in base rates previously authorized by the MoPSC in its 2010 electric rate order. The revenue increase was based on a 10.2% return on equity, a capital structure composed of 52.2% common equity, and a rate base of $6.6 billion. The rate changes became effective on July 31, 2011. The MoPSC order approved the continued use of Ameren Missouri's vegetation management and infrastructure cost tracker, its pension and postretirement benefit cost tracker, and the FAC at the current 95% sharing level. The MoPSC order shortened the FAC recovery and refund period from 12 months to eight months. The MoPSC order denied Ameren Missouri's request for the ability to recover any under-recovery of fixed costs as a result of lower sales volumes from the implementation of energy efficiency measures.

Additionally, the MoPSC order provided for a tracking mechanism for uncertain income tax positions. The order provides that reserves for uncertain income tax positions do not reduce rate base. However, when an uncertain income tax position liability is resolved, the order requires the creation of a regulatory asset or regulatory liability to reflect the time value (using the weighted-average cost of capital in the order) of the difference between the uncertain income tax position liability that was excluded from rate base and the final tax liability. The resulting regulatory asset or liability will be amortized over three years beginning on the effective date of new rates established in the next electric rate case.

The MoPSC order disallowed the recovery of all costs of enhancements, or costs that would have been incurred absent the breach, related to the rebuilding of the Taum Sauk energy center in excess of amounts recovered from property insurance. As a result of the order, Ameren and Ameren Missouri each recorded in 2011 a pretax charge to earnings of $89 million relating to the Taum Sauk disallowance. This charge was recorded in Ameren's statement of income as "Goodwill, impairment and other charges" and recorded in Ameren Missouri's statement of income as "Loss from regulatory disallowance."

In July 2011, a new law that reformed the judicial appeal process for MoPSC rate orders took effect. Among other items, the new law allows appeals to bypass the circuit court and to be made directly to the appellate court. The new law provides that rates cannot be stayed; however, the appellate court could direct the MoPSC to revise rates. Such rate revisions could be ordered to be applied retroactively. This new law applied to judicial appeals of the MoPSC's July 2011 rate order.

In August 2011, Ameren Missouri appealed the disallowance of Taum Sauk enhancements to the Missouri Court of Appeals, Western District. A decision is expected by the Missouri Court of Appeals, Western District, in 2012. Ameren Missouri cannot predict the ultimate outcome of its appeal.

Pending Electric Rate Case

On February 3, 2012, Ameren Missouri filed a request with the MoPSC to increase its annual revenues for electric service by $376 million. Included in this requested increase is a $103 million increase in normalized net fuel costs above the net fuel costs included in base rates previously authorized by the MoPSC in its July 2011 electric rate order. Absent initiation of this general rate proceeding, 95% of this amount would have been reflected in rate adjustments implemented under Ameren Missouri's FAC. Approximately $85 million of the request relates to investments to improve the reliability of Ameren Missouri's infrastructure and to comply with environmental and renewable energy regulations, including the requested return on such investments, and $81 million of the request relates to recovery of the costs associated with energy efficiency programs under the MEEIA, including energy efficiency investments, which is discussed below. The electric rate increase request was based on a 10.75% return on equity, a capital structure composed of 52% common equity, an aggregate electric rate base of $6.8 billion, and a test year ended September 30, 2011, with certain pro forma adjustments expected through the anticipated true-up date of July 31, 2012.

As part of its filing, Ameren Missouri requested that the MoPSC approve the implementation of a storm cost tracking mechanism, as well as plant-in-service accounting treatment. The proposed storm cost tracking mechanism would allow Ameren Missouri to record a regulatory asset or liability, as applicable, reflecting the difference between a base level of major storm restoration costs used to set rates in the current rate case and the actual storm restoration costs, and to request recovery of such regulatory asset or liability in Ameren Missouri's next rate case for amortization over a three-year period. The plant-in-service accounting treatment would permit Ameren Missouri to recover a return and to defer depreciation expense on assets placed in service but not yet reflected in customer rates.

Ameren Missouri requested continued use of the FAC and the regulatory tracking mechanisms for vegetation management/infrastructure inspection costs, for pension and postretirement benefits, and for uncertain income tax positions that the MoPSC previously authorized in earlier electric rate orders. Ameren Missouri also requested recovery of the 2011 voluntary separation program severance costs over three years.

A decision by the MoPSC in this proceeding is expected in December 2012. Ameren Missouri cannot predict the level of any electric service rate change the MoPSC may approve, when any rate change may go into effect, or whether any rate increase that may eventually be approved will be sufficient for Ameren Missouri to recover its costs and earn a reasonable return on its investments when the increase goes into effect.

MEEIA Filing

The MEEIA, enacted in 2009, established a regulatory framework that, among other things, allows electric utilities to recover costs related to MoPSC-approved energy efficiency programs. The law requires the MoPSC to ensure that a utility's financial incentives are aligned with helping customers use energy more efficiently, to provide timely cost recovery, and to provide earnings opportunities associated with cost-effective energy efficiency programs. Missouri does not have a law mandating energy efficiency standards.

In January 2012, Ameren Missouri made its initial filing with the MoPSC under the MEEIA. This filing proposes a three-year plan that includes a portfolio of energy efficiency programs along with a cost-recovery mechanism. If the proposal is approved, beginning in January 2013, Ameren Missouri plans to invest $145 million over three years for the proposed energy efficiency programs.

A decision by the MoPSC in this proceeding is anticipated in the second quarter of 2012. The MoPSC's order in this proceeding will not affect Ameren Missouri rates until these rates are included in an electric service rate case. Ameren Missouri anticipates that the impacts of the MoPSC's decision in this MEEIA filing will be included in rates set under its pending electric service rate case that was filed on February 3, 2012, which has an anticipated true-up date of July 31, 2012. Ameren Missouri's pending electric rate case includes an annual revenue increase of $81 million relating to its planned portfolio of energy efficiency programs included in its MEEIA filing.

FAC Prudence Review

Missouri law requires the MoPSC to complete prudence reviews of Ameren Missouri's FAC at least every 18 months. In April 2011, the MoPSC issued an order with respect to its review of Ameren Missouri's FAC for the period from March 1, 2009, to September 30, 2009. In this order, the MoPSC ruled that Ameren Missouri should have included in the FAC calculation all revenues and costs associated with certain long-term partial requirements sales that were made by Ameren Missouri because of the loss of Noranda's load caused by a severe ice storm in January 2009. As a result of the order, Ameren Missouri recorded a pretax charge to earnings of $18 million, including $1 million for interest, in 2011 for its obligation to refund to Ameren Missouri's electric customers the earnings associated with these sales previously recognized by Ameren Missouri during the period from March 1, 2009, to September 30, 2009. In October 2011, Ameren Missouri began refunding the $18 million to customers through the FAC.

Ameren Missouri disagrees with the MoPSC order's classification of these sales and believes that the terms of its FAC tariff did not provide for the inclusion of these sales in the FAC calculation. In June 2011, Ameren Missouri filed an appeal with the Cole County Circuit Court. A decision is expected from the Cole County Circuit Court in 2012. Separately, in July 2011, Ameren Missouri filed a request with the MoPSC for an accounting authority order that would allow Ameren Missouri to defer, as a regulatory asset, fixed costs totaling $36 million that were not recovered from Noranda as a result of the loss of load caused by the severe 2009 ice storm for potential recovery in a future electric rate case. We cannot predict the ultimate outcome of these regulatory or judicial proceedings.

Ameren Missouri recognized an additional $25 million of pretax earnings associated with the same long-term partial requirements sales contracts subsequent to September 30, 2009, which were not addressed by the MoPSC order issued in April 2011. The MoPSC's FAC review for the period from October 1, 2009, to May 31, 2011, was initiated in September 2011. In October 2011, the MoPSC staff filed a recommendation with the MoPSC to direct Ameren Missouri to refund to customers, prior to the completion of the staff's prudence review, the pretax earnings associated with the same long-term partial requirements sales contracts subsequent to September 30, 2009. The MoPSC staff calculated these pretax earnings to be $26 million. We cannot predict whether the MoPSC will approve this recommendation. If Ameren Missouri were to determine that these sales were probable of refund to Ameren Missouri's electric customers, a charge to earnings would be recorded for the refund in the period in which that determination was made. Because of pending court appeals and regulatory review, Ameren Missouri does not currently believe these amounts are probable of refund to customers.

Renewable Energy Portfolio Requirement

A ballot initiative passed by Missouri voters in November 2008 created a renewable energy portfolio requirement. Beginning in 2011, Ameren Missouri and other Missouri investor-owned utilities are required to purchase or generate from renewable energy sources electricity equaling at least 2% of native load sales, with that percentage increasing in subsequent years to at least 15% by 2021, subject to a 1% limit on customer rate impacts. At least 2% of each portfolio requirement must be derived from solar energy. Compliance with the renewable energy portfolio requirement can be achieved through generation or the procurement of renewable energy credits. Ameren Missouri expects that any related costs or investments will ultimately be recovered in rates.

In July 2010, the MoPSC issued final rules implementing the state's renewable energy portfolio requirement. Ameren Missouri objected to the MoPSC rules calculating the 1% limit on customer rates. In August 2010, Ameren Missouri and other groups filed an appeal with the Cole County Circuit Court of multiple aspects of the MoPSC's rules. In December 2011, the Cole County Circuit Court issued a ruling clarifying that the 1% customer rate increase limit is an annual restriction, not a multiyear limit.

Illinois

IEIMA

In October 2011, the IEIMA was enacted into law and became effective immediately. Certain amendments to the IEIMA became effective on December 30, 2011. On January 3, 2012, Ameren Illinois elected to participate in the performance-based formula ratemaking process established pursuant to the IEIMA by filing initial performance-based formula rates with the ICC. With this filing, as required by law, Ameren Illinois' previously pending electric delivery service rate case was withdrawn. The initial filing, based on 2010 recoverable costs and expected net plant additions for 2011 and 2012, will result in new electric delivery service rates in October 2012. Pending ICC approval, the initial filing will result in a decrease of $19 million in Ameren Illinois revenues for electric delivery service, on an annualized basis. Ameren Illinois anticipates making an update filing by May 1, 2012, based on 2011 costs and expected net plant additions for 2012, that would result in new electric delivery service rates on January 1, 2013.

Ameren Illinois will participate in a performance-based formula process for determining rates. The formula will provide for the recovery of actual costs of electric delivery service that are prudently incurred, reflect the utility's actual regulated capital structure, and include a formula for calculating the return on equity component of the cost of capital. The return on equity component of the formula rate will be equal to the average for the applicable calendar year of the monthly average yields of 30-year United States treasury bonds plus 590 basis points for 2012 and 580 basis points thereafter. Ameren Illinois' actual return on equity relating to electric delivery service will be subject to a collar adjustment on earnings in excess of 50 basis points above or below its allowed return. Beginning in 2012, the law provides for an annual reconciliation of revenues to costs prudently and reasonably incurred. This annual revenue reconciliation, along with the collar adjustment, if necessary, will be collected from or refunded to customers in a subsequent year.

Ameren Illinois will also be subject to five performance standards. Failure to achieve the standards will result in a reduction in the company's allowed return on equity calculated under the formula. The performance standards include improvements in service reliability to reduce both the frequency and duration of outages, improvements in customer satisfaction scores, reduction in the number of estimated bills, and a reduction in uncollectible accounts expense. The IEIMA provides for return on equity penalties totaling up to 30 basis points in 2013 through 2015, 34 basis points in 2016 through 2018, and 38 basis points in 2019 through 2022 if the performance standards are not met. The formula ratemaking process is effective until the end of 2017, but could be extended by the Illinois General Assembly for an additional five years. The formula ratemaking process would also terminate if the average residential rate increases by more than 2.5% annually from June 2011 through May 2014.

Between 2012 and 2021, Ameren Illinois will be required to invest $625 million in capital expenditures incremental to Ameren Illinois' average electric delivery capital expenditures for calendar years 2008 through 2010 to modernize its distribution system. Such investments are expected to encourage economic development and to create an estimated 450 additional jobs within Illinois. Ameren Illinois is subject to monetary penalties if 450 additional jobs are not created during the peak program years. Also, Ameren Illinois will be required to contribute $1 million annually for certain nonrecoverable customer assistance programs for as long as Ameren Illinois participates in the formula ratemaking process. Ameren Illinois will also be required to make a one-time $7.5 million nonrecoverable donation to the Illinois Science and Energy Innovation Trust in 2012, as well as an approximate $1 million annual donation to the same trust for as long as it participates in the formula ratemaking process.

The IEIMA does not apply to natural gas utilities.

2012 Natural Gas Delivery Service Rate Order

In January 2012, the ICC issued a rate order that approved an increase in annual Ameren Illinois' revenues for natural gas delivery service of $32 million. The revenue increase was based on a 9.06% return on equity, a capital structure composed of 53.3% common equity, and a rate base of $1 billion. The rate order was based on a 2012 future test year. The rate changes became effective on January 20, 2012.  In February 2012, the ICC denied rehearing requests by Ameren Illinois and an intervenor related to the granted return on equity.

 

2010 Electric and Natural Gas Delivery Service Rate Orders

During 2010, the ICC issued orders that authorized an aggregate $40 million increase in Ameren Illinois' annual electric and natural gas delivery service revenues.

In December 2010, Ameren Illinois and an intervenor appealed portions of the ICC's orders to the Appellate Court of the Fourth District of Illinois. In January 2012, the Appellate Court issued a decision that upheld the ICC's 2010 electric and natural gas delivery service rate order.

Federal

Electric Transmission Investment

FERC, in its order issued in May 2011, approved transmission rate incentives for the Illinois Rivers project and the Big Muddy project, which will be developed by ATXI or ATX. The FERC May 2011 order approved the following rate mechanisms with respect to Ameren's Illinois Rivers and Big Muddy projects:

 

Ÿ  

Full recovery of financing costs, including debt and equity, associated with construction work in progress before the asset is placed in service;

Ÿ  

Recovery of costs prudently incurred in developing project facilities that might later be abandoned due to issues outside the company's control; and

Ÿ  

Use of a hypothetical capital structure during construction that reflects a capital structure of 56% common equity.

In December 2011, MISO approved the Illinois Rivers project as well as the Spoon River and Mark Twain projects. The total investment in these three MISO-approved projects is expected to be more than $1.2 billion through 2019, with potential investment of $750 million from 2012 to 2016. All four projects are in Missouri and Illinois. Construction will begin first on the Illinois Rivers project. The Big Muddy project is currently being evaluated for inclusion in MISO's 2012 expansion plan.

On December 30, 2011, ATXI made a filing with FERC seeking a forward-looking rate calculation with an annual revenue reconciliation adjustment as well as requesting the implementation of the incentives FERC approved in its May 2011 order described above for the Illinois Rivers project and the Big Muddy project. FERC is expected to issue a decision on the ATXI filing during the first quarter of 2012.

2011 Wholesale Distribution Rate Case

In January 2011, Ameren Illinois filed a request with FERC to increase its annual revenues for electric delivery service for its wholesale customers by $11 million. These wholesale distribution revenues are treated as a deduction from Ameren Illinois' revenue requirement in retail rate filings with the ICC. In March 2011, FERC issued an order authorizing the proposed rates to take effect, subject to refund when the final rates are determined. Ameren Illinois reached an agreement with two of its nine wholesale customers in 2011. The impasse with the remaining seven wholesale customers has resulted in FERC litigation. An initial decision by the FERC administrative law judge is expected in 2012 and a final FERC decision may be received after 2012. We cannot predict the ultimate outcome of this proceeding or its impact on Ameren's or Ameren Illinois' results of operations, financial position, or liquidity.

Regional Transmission Organization

Ameren Missouri is a transmission owning member of MISO. Ameren Missouri received authorization from the MoPSC to participate in MISO, subject to certain conditions. Ameren Missouri's continued conditional MISO participation is authorized by the MoPSC through April 30, 2012.

As required by the MoPSC, Ameren Missouri filed in November 2010 and again in August 2011 updated cost benefit studies with the MoPSC that evaluated the costs and benefits of Ameren Missouri's continued participation in MISO. Ameren Missouri's updated studies continue to show substantial benefits to Ameren Missouri customers associated with its participation in MISO.

In November 2011, Ameren Missouri, together with the MoPSC staff, the MIEC, and MISO, filed a Non-Unanimous Stipulation and Agreement (Stipulation) with the MoPSC that reflected their agreement that continued Ameren Missouri participation in MISO through May 31, 2016, was prudent and reasonable, subject to certain conditions. The MoOPC opposes the Stipulation, in part because of its desire that the MoPSC impose conditions relating to ATX's involvement in transmission projects located within Ameren Missouri's service territory. These conditions, which are not included in the Stipulation are, in Ameren Missouri's view, inappropriate and unlawful. Ameren Missouri expects an order from the MoPSC before April 30, 2012.

FERC Order – MISO Charges

Ameren Missouri and Ameren Illinois, as well as other MISO participants, have filed complaints with FERC with respect to the FERC's March 2007 order involving the reallocation of certain MISO operational costs among MISO participants retroactive to 2005. Subsequently, FERC has issued a series of orders related to the applicability and the implementation of the order, which in some cases have conflicted with previous orders.

In May 2009, FERC changed the effective date for refunds such that certain operational costs would be allocated among MISO market participants beginning November 2008, instead of August 2007. In June 2009, Ameren Missouri and Ameren Illinois filed a request for rehearing. The rehearing request is pending.

In June 2009, FERC issued an order dismissing rehearing requests of a November 2008 order and waiving refunds of amounts billed that were included in the MISO charge, under the assumption that there was a rate mismatch for the period April 2006 through November 2007. Ameren Missouri and Ameren Illinois filed a request for rehearing in July 2009. This rehearing request is pending.

Ameren Missouri and Ameren Illinois do not believe that the ultimate resolution of these proceedings will have a material effect on their results of operations, financial position, or liquidity.

Ameren Missouri Power Purchase Agreement with Entergy Arkansas, Inc.

Beginning in 2005, FERC issued a series of orders addressing a complaint filed in 2001 by the Louisiana Public Service Commission (LPSC) against Entergy Arkansas, Inc. (Entergy) and certain of its affiliates. The complaint alleged unjust and unreasonable cost allocations. As a result of the FERC orders, Entergy began billing Ameren Missouri in 2007 for additional charges under a 165-megawatt power purchase agreement, and Ameren Missouri paid those charges. Additional charges continued during the remainder of the term of the power purchase agreement, which expired August 31, 2009. Although Ameren Missouri was not a party to the FERC proceedings that gave rise to these additional charges, Ameren Missouri intervened in related FERC proceedings. Ameren Missouri also filed a complaint with FERC against Entergy and Entergy Services, Inc. in April 2008 to challenge the additional charges. In January 2010, FERC issued a ruling that Entergy may not pass the additional charges on to Ameren Missouri. In February 2010, Entergy filed a request for rehearing of the January 2010 ruling. Ameren Missouri has not recorded any prospective refund for additional charges paid to Entergy as a result of the FERC orders.

The LPSC appealed FERC's orders regarding LPSC's complaint against Entergy Services, Inc. to the United States Court of Appeals for the District of Columbia. In April 2008, that court ordered further FERC proceedings regarding LPSC's complaint. The court ordered FERC to explain its previous denial of retroactive refunds and the implementation of prospective charges. FERC's decision on remand of the retroactive impact of these issues could have a financial impact on Ameren Missouri. Ameren Missouri is unable to predict how FERC will respond to the court's decisions. Ameren Missouri estimates that it could incur an additional expense of up to $25 million if FERC orders retroactive application for the years 2001 to 2005. Ameren Missouri believes that the likelihood of incurring any expense is not probable, and therefore no liability has been recorded as of December 31, 2011. Ameren Missouri plans to participate in any proceeding that FERC initiates to address the court's decisions.

 

COLA and Early Site Permit

In 2008, Ameren Missouri filed an application with the NRC for a COLA for a new 1,600-megawatt nuclear unit at Ameren Missouri's existing Callaway County, Missouri, nuclear energy center site. In 2009, Ameren Missouri suspended its efforts to build a new nuclear unit at its existing Missouri nuclear energy center site, and the NRC suspended review of the COLA.

Ameren Missouri is considering filing an application to obtain an early site permit from the NRC for the Callaway energy center site. An early site permit approves a specific location for a nuclear facility; however, additional licenses would be required for the specific type and design of nuclear facility to be built at that site. An early site permit does not authorize construction of a plant. An early site permit is valid for 20 years and could be renewed for up to an additional 20 years. Attempts to pass legislation to maintain an option for nuclear power in the state of Missouri by recovering the costs of the early site permit, subject to appropriate consumer protections, were not successful during 2011. However, support for nuclear power exists in the state of Missouri, which could lead to the passage of an early site permit recovery mechanism in future legislative sessions. Ameren Missouri's pursuit of an early site permit is dependent upon enactment of a legislative framework ensuring cost recovery.

As of December 31, 2011, Ameren Missouri had capitalized $69 million relating to its efforts to construct a new nuclear unit. All of these incurred costs will remain capitalized while management assesses options to maximize the value of its investment in this project. If efforts are permanently abandoned or management concludes it is probable the costs incurred will be disallowed in rates, a charge to earnings would be recognized in the period in which that determination was made.

Pumped-storage Hydroelectric Energy Center Relicensing

In June 2008, Ameren Missouri filed a relicensing application with FERC to operate its Taum Sauk pumped-storage hydroelectric energy center for another 40 years. The existing FERC license expired on June 30, 2010. On July 2, 2010, Ameren Missouri received a license extension that allows Taum Sauk to continue operations until FERC issues a new license. FERC is reviewing the relicensing application. A FERC order is expected in 2012 or 2013. Ameren Missouri cannot predict the ultimate outcome of the application.

 

Regulatory Assets and Liabilities

In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs pursuant to actions of regulators or based on the expected ability to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts because of actions of regulators or because of the expectation that such amounts will be returned to customers in future rates. The following table presents Ameren's, Ameren Missouri's and Ameren Illinois' regulatory assets and regulatory liabilities at December 31, 2011 and 2010:

 

      2011           2010  
     Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

          Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

 

Current regulatory assets:

                   

Under-recovered FAC(b)(c)

   $ 83       $ 83       $ -         $ 158       $ 158       $ -   

Under-recovered Illinois electric power costs(b)(d)

     4         -         4           4         -         4   

Under-recovered PGA(b)(d)

     8         5         3           2         -         2   

MTM derivative losses(e)

     120         21         299             103         21         254   

Total current regulatory assets

   $ 215       $ 109       $ 306           $ 267       $ 179       $ 260   

Noncurrent regulatory assets:

                   

Pension and postretirement benefit costs(f)

   $ 878       $ 382       $ 496         $ 555       $ 251       $ 304   

Income taxes(g)

     239         234         5           230         225         5   

Asset retirement obligation(h)

     6         -         6           9         3         6   

Callaway costs(b)(i)

     48         48         -           51         51         -   

Unamortized loss on reacquired debt(b)(j)

     47         21         26           53         25         28   

Recoverable costs – contaminated facilities(k)

     102         -         102           127         -         127   

MTM derivative losses(e)

     100         13         87           85         14         249   

SO2 emission allowances sale tracker(l)

     6         6         -           12         12         -   

Storm costs(m)

     16         16         -           23         23         -   

Demand-side costs(n)

     70         70         -           39         39         -   

Reserve for workers' compensation liabilities(o)

     13         7         6           14         8         6   

Credit facilities fees(p)

     10         10         -           12         12         -   

Employee separation costs(q)

     6         3         3           8         6         2   

Common stock issuance costs(r)

     10         10         -           12         12         -   

Construction accounting for pollution control equipment(b)(s)

     25         25         -           4         4         -   

Other(t)

     27         10         17             29         9         20   

Total noncurrent regulatory assets

   $     1,603       $     855       $     748           $     1,263       $     694       $     747   

Current regulatory liabilities:

                   

Over-recovered FAC(u)

   $ 12       $ 12       $ -         $ -       $ -       $ -   

Over-recovered Illinois electric power costs(d)

     66         -         66           62         -         62   

Over-recovered PGA(d)

     9         -         9           12         1         11   

MTM derivative gains(v)

     46         45         1             25         22         3   

Total current regulatory liabilities

   $ 133       $ 57       $ 76           $ 99       $ 23       $ 76   

Noncurrent regulatory liabilities:

                   

Income taxes(w)

   $ 48       $ 44       $ 4         $ 54       $ 48       $ 6   

Removal costs(x)

     1,269         719         550           1,177         655         522   

Asset retirement obligation(h)

     29         29         -           -         -         -   

MTM derivative gains(v)

     82         4         78           20         13         7   

Bad debt rider(y)

     10         -         10           5         -         5   

Pension and postretirement benefit costs tracker(z)

     38         38         -           45         45         -   

Energy efficiency rider(aa)

     24         -         24           13         -         13   

Other(bb)

     2         2         -             5         5         -   

Total noncurrent regulatory liabilities

   $ 1,502       $ 836       $ 666           $ 1,319       $ 766       $ 553   

 

(a) Includes intercompany eliminations.
(b) These assets earn a return.
(c) Under-recovered fuel costs for periods from July 2009 through December 2011. Specific accumulation periods aggregate the under-recovered costs over four months, any related adjustments occur over the following four months, and then recovery from customers occurs over the next eight months.
(d) Costs under- or over-recovered from utility customers. Amounts will be recovered from, or refunded to, customers within one year of the deferral.
(e) Deferral of commodity-related derivative MTM losses, as well as the MTM losses on financial contracts entered into by Ameren Illinois with Marketing Company.
(f) These costs are being amortized in proportion to the recognition of prior service costs (credits), transition obligations (assets), and actuarial losses (gains) attributable to Ameren's pension plan and postretirement benefit plans. See Note 11 – Retirement Benefits for additional information.
(g) Offset to certain deferred tax liabilities for expected recovery of future income taxes when paid. See Note 13 – Income Taxes for amortization period.
(h) Recoverable or refundable removal costs for AROs at our rate-regulated operations, including net realized and unrealized gains and losses related to the nuclear decommissioning trust fund investments. See Note 1 – Summary of Significant Accounting Policies – Asset Retirement Obligations.
(i) Ameren Missouri's Callaway energy center operations and maintenance expenses, property taxes, and carrying costs incurred between the plant in-service date and the date the plant was reflected in rates. These costs are being amortized over the remaining life of the plant's current operating license (through 2024).
(j) Losses related to reacquired debt. These amounts are being amortized over the lives of the related new debt issuances or the remaining lives of the old debt issuances if no new debt was issued.
(k) The recoverable portion of accrued environmental site liabilities, primarily collected from electric and natural gas customers through ICC-approved cost recovery riders. The period of recovery will depend on the timing of actual expenditures. See Note 15 – Commitments and Contingencies for additional information.
(l)

A regulatory tracking mechanism for gains on sales of SO2 emission allowances, net of SO2 premiums incurred under the terms of coal procurement contracts, plus any SO2 discounts received under such contracts, as approved in a MoPSC order. The MoPSC's May 2010 electric rate order discontinued any future deferrals under this tracking mechanism. The MoPSC's July 2011 rate order approved the amortization of these costs through July 2013.

(m) Actual storm costs in a test year that exceed the MoPSC staff's normalized storm costs for rate purposes. The 2006 storm costs are being amortized until July 2013. The 2008 storm costs are being amortized over five years, beginning on March 1, 2009. In addition, the balance includes January 2007 ice storm costs that Ameren Missouri will recover over five years, beginning in March 2009, as approved by the January 2009 MoPSC electric rate order. The 2009 storm costs are being amortized over five years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order.
(n) Demand-side costs, including the costs of developing, implementing and evaluating customer energy efficiency and demand response programs. Costs incurred from May 2008 through September 2008 are being amortized over 10 years, beginning in March 2009. Costs incurred from October 2008 through December 2009 are being amortized over six years, beginning in July 2010. Costs incurred from January 2010 through February 2011 are being amortized over six years, beginning in August 2011. The amortization period for the costs incurred after February 2011 will be determined in Ameren Missouri's pending electric rate case.
(o) Reserve for workers' compensation claims.
(p) Ameren Missouri's costs incurred to enter into and maintain the 2009 multiyear and supplemental credit agreements, prior to their termination in 2010. These costs are being amortized over two years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order. These costs are being amortized to construction work in progress, which will be subsequently depreciated when assets are placed into service.
(q) Cost incurred for the voluntary and involuntary separation programs. The 2009 Ameren Missouri-related costs are being amortized over three years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order. The 2009 Ameren Illinois-related costs are being amortized over three years, beginning in May 2010, as approved by the April 2010 ICC electric and natural gas rate order.
(r) The MoPSC's May 2010 electric rate order allowed Ameren Missouri to recover its portion of Ameren's September 2009 common stock issuance costs. These costs are being amortized over five years, beginning in July 2010.
(s) The MoPSC's May 2010 electric rate order allowed Ameren Missouri to continue recording an allowance for funds used during construction for pollution control equipment at its Sioux energy center until the cost of that equipment is placed in customer rates. The amortization of these costs will be over the expected life of the Sioux energy center.
(t) Includes costs related to Ameren Illinois' delivery service rate cases that resulted in orders in 2008 and 2010 as well as the natural gas delivery service rate case that resulted in an order in January 2012. The natural gas costs associated with the 2008 rate case will be amortized until September 2013. The 2010 rate case costs are being amortized over a two-year period, beginning in May 2010. The 2012 natural gas rate case costs will be amortized over a two year period, beginning in January 2012. The Ameren Illinois total also includes a portion of the unamortized debt fair value adjustment recorded upon Ameren's acquisition of IP. This portion is being amortized over the remaining life of the related debt, beginning with the expiration of the electric rate freeze in Illinois on January 1, 2007. The Ameren Illinois total also includes Ameren Illinois Merger integration and optimization costs. These costs will be amortized over four years, beginning in January 2012. At Ameren Missouri, the balance includes cost associated with the retirement of renewable energy credits and solar rebates to fulfill Ameren Missouri's renewable energy portfolio requirement. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case. The Ameren Missouri balance also includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2011 through December 2011 were more than the amount allowed in base rates. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case.
(u) Over-recovered fuel costs from March 2009 through September 2009 as ordered by the MoPSC in April 2011. Customer refunds will conclude in May 2012.
(v) Deferral of commodity-related derivative MTM gains.
(w) Unamortized portion of investment tax credit and federal excess deferred taxes. See Note 13 – Income Taxes for amortization period.
(x) Estimated funds collected for the eventual dismantling and removal of plant from service, net of salvage value, upon retirement related to our rate-regulated operations. See discussion in Note 1 – Summary of Significant Accounting Policies – Asset Retirement Obligations.
(y) A regulatory tracking mechanism for the difference between the level of bad debt expense incurred by Ameren Illinois under GAAP and the level of such costs included in electric and natural gas rates. The over-recovery relating to 2010 is being refunded to customers from June 2011 through May 2012. The over-recovery relating to 2011 will be refunded to customers from June 2012 through May 2013.
(z)

A regulatory tracking mechanism for the difference between the level of pension and postretirement benefit costs incurred by Ameren Missouri under GAAP and the level of such costs built into electric rates. The 2008 costs are being amortized through February 2014. The 2009 costs are being amortized through June 2015. The 2010 costs assigned to the natural gas and electric businesses are being amortized through February 2016 and July 2016, respectively. The 2011 costs will be determined in Ameren Missouri's pending electric rate case.

(aa) A regulatory tracking mechanism that allows Ameren Illinois to recover its electric and natural gas costs associated with developing, implementing and evaluating customer energy efficiency and demand response programs. This over-recovery will be refunded to customers over the following 12 months after the plan year.
(bb) Balance includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2010 through February 2011 were less than the amount allowed in base rates. The over-recovery incurred during that time period is being amortized over three years beginning in August 2011. The balance also includes the deferral of gains on emission allowance vintage swaps Ameren Missouri entered into during 2005. The balance of this gain was immaterial at the end of 2011.

Ameren Missouri and Ameren Illinois continually assess the recoverability of their regulatory assets. Under current accounting standards, regulatory assets are charged to earnings when it is no longer probable that such amounts will be recovered through future revenues. To the extent that payments of regulatory liabilities are no longer probable, the amounts are credited to earnings.

Property And Plant, Net

NOTE 3 – PROPERTY AND PLANT, NET

The following table presents property and plant, net, for each of the Ameren Companies at December 31, 2011 and 2010:

 

The following table provides accrued capital expenditures at December 31, 2011, 2010, and 2009, which represent noncash investing activity excluded from the statements of cash flows:

 

NOTE 3 – PROPERTY AND PLANT, NET

The following table presents property and plant, net, for each of the Ameren Companies at December 31, 2011 and 2010:

 

      Ameren(a)(b)      Ameren
Missouri(b)
     Ameren
Illinois
     Genco  

2011:

           

Property and plant, at original cost:

           

Electric

   $     24,256       $     14,986       $     4,600       $     3,370   

Gas

     1,746         385         1,361         -   

Other

     466         113         91         39   
     26,468         15,484         6,052         3,409   

Less: Accumulated depreciation and amortization

     9,429         6,276         1,364         1,377   
     17,039         9,208         4,688         2,032   

Construction work in progress:

           

Nuclear fuel in process

     255         255         -         -   

Other

     833         495         82         199   

Property and plant, net

   $ 18,127       $ 9,958       $ 4,770       $ 2,231   

2010:

           

Property and plant, at original cost:

           

Electric

   $ 24,069       $ 14,745       $ 4,436       $ 3,572   

Gas

     1,661         374         1,286         -   

Other

     424         91         61         48   
     26,154         15,210         5,783         3,620   

Less: Accumulated depreciation and amortization

     9,194         6,052         1,250         1,518   
     16,960         9,158         4,533         2,102   

Construction work in progress:

           

Nuclear fuel in process

     259         259         -         -   

Other

     634         358         43         146   

Property and plant, net

   $ 17,853       $ 9,775       $ 4,576       $ 2,248   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries as well as intercompany eliminations.
(b) Amounts in Ameren and Ameren Missouri include two electric generation CTs under two separate capital lease agreements. The gross asset value of those agreements was $229 million and $228 million at December 31, 2011 and 2010, respectively. The total accumulated depreciation associated with the two CTs was $52 million and $46 million at December 31, 2011 and 2010, respectively.

The following table provides accrued capital expenditures at December 31, 2011, 2010, and 2009, which represent noncash investing activity excluded from the statements of cash flows:

 

      Ameren(a)      Ameren
Missouri
     Ameren
Illinois
     Genco  

2011

   $     107       $     73       $     18       $     13   

2010

     79         53         15         8   

2009

     143         86         29         23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

NOTE 3 – PROPERTY AND PLANT, NET

The following table presents property and plant, net, for each of the Ameren Companies at December 31, 2011 and 2010:

 

      Ameren(a)(b)      Ameren
Missouri(b)
     Ameren
Illinois
     Genco  

2011:

           

Property and plant, at original cost:

           

Electric

   $     24,256       $     14,986       $     4,600       $     3,370   

Gas

     1,746         385         1,361         -   

Other

     466         113         91         39   
     26,468         15,484         6,052         3,409   

Less: Accumulated depreciation and amortization

     9,429         6,276         1,364         1,377   
     17,039         9,208         4,688         2,032   

Construction work in progress:

           

Nuclear fuel in process

     255         255         -         -   

Other

     833         495         82         199   

Property and plant, net

   $ 18,127       $ 9,958       $ 4,770       $ 2,231   

2010:

           

Property and plant, at original cost:

           

Electric

   $ 24,069       $ 14,745       $ 4,436       $ 3,572   

Gas

     1,661         374         1,286         -   

Other

     424         91         61         48   
     26,154         15,210         5,783         3,620   

Less: Accumulated depreciation and amortization

     9,194         6,052         1,250         1,518   
     16,960         9,158         4,533         2,102   

Construction work in progress:

           

Nuclear fuel in process

     259         259         -         -   

Other

     634         358         43         146   

Property and plant, net

   $ 17,853       $ 9,775       $ 4,576       $ 2,248   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries as well as intercompany eliminations.
(b) Amounts in Ameren and Ameren Missouri include two electric generation CTs under two separate capital lease agreements. The gross asset value of those agreements was $229 million and $228 million at December 31, 2011 and 2010, respectively. The total accumulated depreciation associated with the two CTs was $52 million and $46 million at December 31, 2011 and 2010, respectively.

The following table provides accrued capital expenditures at December 31, 2011, 2010, and 2009, which represent noncash investing activity excluded from the statements of cash flows:

 

      Ameren(a)      Ameren
Missouri
     Ameren
Illinois
     Genco  

2011

   $     107       $     73       $     18       $     13   

2010

     79         53         15         8   

2009

     143         86         29         23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

NOTE 3 – PROPERTY AND PLANT, NET

The following table presents property and plant, net, for each of the Ameren Companies at December 31, 2011 and 2010:

 

      Ameren(a)(b)      Ameren
Missouri(b)
     Ameren
Illinois
     Genco  

2011:

           

Property and plant, at original cost:

           

Electric

   $     24,256       $     14,986       $     4,600       $     3,370   

Gas

     1,746         385         1,361         -   

Other

     466         113         91         39   
     26,468         15,484         6,052         3,409   

Less: Accumulated depreciation and amortization

     9,429         6,276         1,364         1,377   
     17,039         9,208         4,688         2,032   

Construction work in progress:

           

Nuclear fuel in process

     255         255         -         -   

Other

     833         495         82         199   

Property and plant, net

   $ 18,127       $ 9,958       $ 4,770       $ 2,231   

2010:

           

Property and plant, at original cost:

           

Electric

   $ 24,069       $ 14,745       $ 4,436       $ 3,572   

Gas

     1,661         374         1,286         -   

Other

     424         91         61         48   
     26,154         15,210         5,783         3,620   

Less: Accumulated depreciation and amortization

     9,194         6,052         1,250         1,518   
     16,960         9,158         4,533         2,102   

Construction work in progress:

           

Nuclear fuel in process

     259         259         -         -   

Other

     634         358         43         146   

Property and plant, net

   $ 17,853       $ 9,775       $ 4,576       $ 2,248   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries as well as intercompany eliminations.
(b) Amounts in Ameren and Ameren Missouri include two electric generation CTs under two separate capital lease agreements. The gross asset value of those agreements was $229 million and $228 million at December 31, 2011 and 2010, respectively. The total accumulated depreciation associated with the two CTs was $52 million and $46 million at December 31, 2011 and 2010, respectively.

The following table provides accrued capital expenditures at December 31, 2011, 2010, and 2009, which represent noncash investing activity excluded from the statements of cash flows:

 

      Ameren(a)      Ameren
Missouri
     Ameren
Illinois
     Genco  

2011

   $     107       $     73       $     18       $     13   

2010

     79         53         15         8   

2009

     143         86         29         23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
Short-Term Debt And Liquidity

NOTE 4 – SHORT-TERM DEBT AND LIQUIDITY

The liquidity needs of the Ameren Companies are typically supported through the use of available cash, short-term intercompany borrowings, drawings under committed bank credit facilities, or commercial paper issuances.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Missouri Credit Agreement described below for the year ended December 31, 2011, and excludes letters of credit issued under the credit agreement:

 

Neither Ameren nor Ameren Illinois borrowed under the 2010 Illinois Credit Agreement during the years ended December 31, 2011, and 2010, respectively.

 

2010 Credit Agreements

Ameren and certain of its subsidiaries entered into multiyear credit facility agreements with a large and diverse group of lenders in 2010. These facilities cumulatively provide $2.1 billion of credit through September 10, 2013. The facilities currently include 25 international, national, and regional lenders, with no lender providing more than $125 million of credit in aggregate.

 

On September 10, 2010, Ameren and Ameren Missouri entered into the $800 million 2010 Missouri Credit Agreement. On September 10, 2010, Ameren and Genco entered into the $500 million 2010 Genco Credit Agreement.

Also on September 10, 2010, Ameren and Ameren Illinois, as successor company to CIPS, CILCO and IP, entered into the $800 million 2010 Illinois Credit Agreement.

 

The obligations of each borrower under the respective 2010 Credit Agreements to which it is a party are several and not joint, and, except under limited circumstances relating to expenses and indemnities, the obligations of Ameren Missouri, Ameren Illinois and Genco under the respective 2010 Credit Agreements are not guaranteed by Ameren or any other subsidiary of Ameren. The maximum aggregate amount available to each borrower under each facility is shown in the following table (such amount being such borrower's "Borrowing Sublimit"):

 

Ameren has the option to seek additional commitments from existing or new lenders to increase the total facility size of the 2010 Credit Agreements to the following maximum amounts: 2010 Missouri Credit Agreement – $1.0 billion; 2010 Genco Credit Agreement – $625 million; and 2010 Illinois Credit Agreement – $1.0 billion. Each of the 2010 Credit Agreements will mature and expire on September 10, 2013. In February 2011, Ameren Illinois received approval from the ICC to extend the expiration of its Borrowing Sublimit under the 2010 Illinois Credit Agreement to September 10, 2013. In June 2011, Ameren Missouri received approval from the MoPSC to extend the expiration of its borrowing sublimit under the 2010 Missouri Credit Agreement to September 10, 2013. The principal amount of each revolving loan owed by a borrower under any of the 2010 Credit Agreements to which it is a party will be due and payable no later than September 10, 2013.

The obligations of all borrowers under the 2010 Credit Agreements are unsecured. Loans are available on a revolving basis under each of the 2010 Credit Agreements and may be repaid and, subject to satisfaction of the conditions to borrowing, reborrowed from time to time. At the election of each borrower, the interest rates on such loans will be the alternate base rate (ABR) plus the margin applicable to the particular borrower and/or the eurodollar rate plus the margin applicable to the particular borrower. The applicable margins will be determined by the borrower's long-term unsecured credit ratings or, if no such ratings are then in effect, the borrower's corporate/issuer ratings then in effect. Letters of credit in an aggregate undrawn face amount not to exceed 25% of the applicable aggregate commitment under the respective 2010 Credit Agreements are also available for issuance for the account of the borrowers thereunder (but within the $2.1 billion overall combined facility borrowing limitations of the 2010 Credit Agreements).

The 2010 Credit Agreements are used to borrow cash, to issue letters of credit, and to support borrowings under Ameren's $500 million commercial paper program, Ameren Missouri's $500 million commercial paper program and Ameren Illinois' $500 million commercial paper program. Any of the 2010 Credit Agreements are available to Ameren to support borrowings under Ameren's commercial paper program, subject to borrowing sublimits. The 2010 Missouri Credit Agreement is available to support borrowings under Ameren Missouri's commercial paper program, and the 2010 Illinois Credit Agreement is available to support borrowings under Ameren Illinois' commercial paper program. At December 31, 2011, Ameren had $148 million of commercial paper outstanding and $15 million of letters of credit outstanding, and Ameren Missouri and Ameren Illinois had no commercial paper or letters of credit outstanding. Based on outstanding borrowings and letters of credit issued under the 2010 Credit Agreements as of December 31, 2011, as well as commercial paper outstanding as of such date, the aggregate amount of credit capacity available under the 2010 Credit Agreements at December 31, 2011, was $1.9 billion.

$20 Million Credit Facility (Terminated)

On June 2, 2010, Ameren entered into a $20 million revolving credit facility ($20 Million Facility). Borrowings under the $20 Million Facility incurred interest at a rate equal to the applicable LIBOR plus 2.25% per annum. The obligations of Ameren under the $20 Million Facility were unsecured. No subsidiary of Ameren was a party to, guarantor of, or borrower under the facility. Ameren had no outstanding borrowings under the facility as of December 31, 2011. Ameren terminated the $20 Million Facility in January 2012. During the years ended December 31, 2011 and 2010, Ameren had average daily balances outstanding of $20 million, with a weighted-average interest rate of 2.48% and 2.54%, respectively.

Commercial Paper

At December 31, 2011, and 2010, Ameren had $148 million and $269 million of commercial paper outstanding, respectively. During the years ended December 31, 2011 and 2010, Ameren had average daily commercial paper balances outstanding of $311 million and $185 million with a weighted-average interest rate of 0.87% and 0.94%, respectively. The peak short-term commercial paper outstanding during the years ended December 31, 2011, and 2010 were $435 million and $366 million, respectively. The peak interest rate for both years was 1.46%. During 2010, the commercial paper was issued only from July through December.

Indebtedness Provisions and Other Covenants

The information below presents a summary of the Ameren Companies' compliance with indebtedness provisions and other covenants.

 

The 2010 Credit Agreements contain conditions about borrowings and issuances of letters of credit, including the absence of default or unmatured default, material accuracy of representations and warranties (excluding any representation after the closing date as to the absence of material adverse change and material litigation), and obtaining required regulatory authorizations. In addition, solely as it relates to borrowings under the 2010 Illinois Credit Agreement, it is a condition for any such borrowing that, at the time of and after giving effect to such borrowing, the borrower not be in violation of any limitation on its ability to incur unsecured indebtedness contained in its articles of incorporation. The 2010 Credit Agreements also contain nonfinancial covenants, including restrictions on the ability to incur liens, to transact with affiliates, to dispose of assets, to make investments in or transfer assets to its affiliates, and to merge with other entities.

The 2010 Credit Agreements require each of Ameren, Ameren Missouri, Ameren Illinois and Genco to maintain consolidated indebtedness of not more than 65% of its consolidated total capitalization pursuant to a defined calculation set forth in the agreements. As of December 31, 2011, the ratios of consolidated indebtedness to total consolidated capitalization, calculated in accordance with the provisions of the 2010 Credit Agreements, were 47%, 48%, 41% and 45%, for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. In addition, under the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, Ameren is required to maintain a ratio of consolidated funds from operations plus interest expense to consolidated interest expense of 2.0to 1.0, to be calculated quarterly, as of the end of the most recent four fiscal quarters then ending, in accordance with the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, as applicable. Ameren's ratio as of December 31, 2011 was 5.1 to 1.0. Failure of a borrower to satisfy a financial covenant constitutes an immediate default under the applicable 2010 Credit Agreement.

The 2010 Credit Agreements contain default provisions. Defaults under the 2010 Credit Agreements apply separately to each borrower; except however, that a default by Ameren Missouri, Ameren Illinois or Genco under any of the 2010 Credit Agreements will also constitute a default by Ameren under such agreement. Defaults include a cross default with respect to a borrower under the applicable 2010 Credit Agreements if that borrower defaults under any other agreement covering outstanding indebtedness of itself and certain subsidiaries (other than project finance subsidiaries and nonmaterial subsidiaries) in excess of $25 million in the aggregate. Any default of Ameren under any 2010 Credit Agreement that exists solely as a result of a default by Ameren Missouri, Ameren Illinois or Genco thereunder will not constitute a default under any other 2010 Credit Agreement while Ameren is otherwise in compliance with all of its obligations under such other 2010 Credit Agreement. Further, a default at the Ameren level under any 2010 Credit Agreement does not trigger a default by Ameren Missouri, Ameren Illinois or Genco under such agreement.

None of the Ameren Companies' credit facilities or other financing arrangements contains credit rating triggers that would cause an event of default or acceleration of repayment of outstanding balances. At December 31, 2011, management believes that the Ameren Companies were in compliance with the provisions and covenants of their credit facilities.

Money Pools

Ameren has money pool agreements with and among its subsidiaries to coordinate and provide for certain short-term cash and working capital requirements. Separate money pools are maintained for utility and non-state-regulated entities. Ameren Services is responsible for the operation and administration of the money pool agreements.

Utility

Ameren Missouri, Ameren Illinois and Ameren Services may participate in the utility money pool as both lenders and borrowers. Ameren and AERG may participate in the utility money pool only as lenders. Ameren Services administers the utility money pool and tracks internal and external funds separately. Internal funds are surplus funds contributed to the utility money pool from participants. The primary sources of external funds for the utility money pool are the 2010 Credit Agreements and the commercial paper programs. The total amount available to the pool participants from the utility money pool at any given time is reduced by the amount of borrowings by participants, but increased to the extent that the pool participants advance surplus funds to the utility money pool or remit funds from other external sources. The availability of funds is also determined by funding requirement limits established by regulatory authorizations. The utility money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the utility money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the utility money pool. There were no utility money pool borrowings during the years ended December 31, 2011 and 2010.

 

Non-state-regulated Subsidiaries

Ameren, Ameren Services, AER, Genco, AERG, Marketing Company, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company authorization and applicable regulatory short-term borrowing authorizations, to access funding from the 2010 Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool, except for Ameren Services, which may participate only as a borrower. The total amount available to the pool participants at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. The average interest rate for borrowing under the non-state-regulated subsidiary money pool for the year ended December 31, 2011, was 0.77% (2010 – 0.77%).

See Note 14 – Related Party Transactions for the amount of interest income and expense from the money pool arrangements recorded by the Ameren Companies for the years ended December 31, 2011, 2010, and 2009.

Unilateral Borrowing Agreement

In addition, a unilateral borrowing agreement exists among Ameren, Ameren Illinois, and Ameren Services, which enables Ameren Illinois to make short-term borrowings directly from Ameren. The aggregate amount of borrowings outstanding at any time by Ameren Illinois under the unilateral borrowing agreement and the utility money pool agreement, together with any outstanding Ameren Illinois external credit facility borrowings or commercial paper issuances, may not exceed $500 million, pursuant to authorization from the ICC. Ameren Illinois is not currently borrowing under the unilateral borrowing agreement. Ameren Services is responsible for operation and administration of the unilateral borrowing agreement.

 

NOTE 4 – SHORT-TERM DEBT AND LIQUIDITY

The liquidity needs of the Ameren Companies are typically supported through the use of available cash, short-term intercompany borrowings, drawings under committed bank credit facilities, or commercial paper issuances.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Missouri Credit Agreement described below for the year ended December 31, 2011, and excludes letters of credit issued under the credit agreement:

 

2010 Missouri Credit Agreement ($800 million)

   Ameren (Parent)     Ameren Missouri      Total  

2011:

       

Average daily borrowings outstanding during 2011

   $ 105      $ —         $ 105   

Outstanding credit facility borrowings at period end

     —          —           —     

Weighted-average interest rate during 2011

     2.30     —           2.30

Peak credit facility borrowings during 2011(a )

   $ 340      $ —         $ 340   

Peak interest rate during 2011

     4.30     —           4.30

2010:

       

Average daily borrowings outstanding during 2010(b )

   $ 195      $ —         $ 195   

Outstanding credit facility borrowings at period end

     340        —           340   

Weighted-average interest rate during 2010( b)

     2.31     —           2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 380      $ —         $ 380   

Peak interest rate during 2010(b )

     2.31     —           2.31

 

(a) The timing of peak credit facility borrowings varies by company and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Genco Credit Agreement described below for the year ended December 31, 2011:

 

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2011:

      

Average daily borrowings outstanding during 2011

   $ —        $ 41      $ 41   

Outstanding credit facility borrowings at period end

     —          —          —     

Weighted-average interest rate during 2011

     —          2.30     2.30

Peak credit facility borrowings during 2011(a)

   $ —        $ 100      $ 100   

Peak interest rate during 2011

     —          2.31     2.31

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2010:

      

Average daily borrowings outstanding during 2010(b )

   $ 36      $ 54      $ 90   

Outstanding credit facility borrowings at period end

     —          100        100   

Weighted-average interest rate during 2010(b )

     2.30     2.31     2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 385      $ 100      $ 385   

Peak interest rate during 2010(b )

     2.31     2.31     2.31

 

(a) The timing of peak credit facility borrowings varies by company, and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

Neither Ameren nor Ameren Illinois borrowed under the 2010 Illinois Credit Agreement during the years ended December 31, 2011, and 2010, respectively.

2010 Credit Agreements

Ameren and certain of its subsidiaries entered into multiyear credit facility agreements with a large and diverse group of lenders in 2010. These facilities cumulatively provide $2.1 billion of credit through September 10, 2013. The facilities currently include 25 international, national, and regional lenders, with no lender providing more than $125 million of credit in aggregate.

 

On September 10, 2010, Ameren and Ameren Missouri entered into the $800 million 2010 Missouri Credit Agreement. On September 10, 2010, Ameren and Genco entered into the $500 million 2010 Genco Credit Agreement.

Also on September 10, 2010, Ameren and Ameren Illinois, as successor company to CIPS, CILCO and IP, entered into the $800 million 2010 Illinois Credit Agreement.

 

The obligations of each borrower under the respective 2010 Credit Agreements to which it is a party are several and not joint, and, except under limited circumstances relating to expenses and indemnities, the obligations of Ameren Missouri, Ameren Illinois and Genco under the respective 2010 Credit Agreements are not guaranteed by Ameren or any other subsidiary of Ameren. The maximum aggregate amount available to each borrower under each facility is shown in the following table (such amount being such borrower's "Borrowing Sublimit"):

 

     2010
Missouri
Credit
Agreement
    2010
Genco
Credit
Agreement
    2010
Illinois
Credit
Agreement
 

Ameren

   $ 500      $ 500      $ 300   

Ameren Missouri

     500        (a     (a

Ameren Illinois

     (a     (a     800   

Genco

     (a     500        (a

 

(a) Not applicable.

Ameren has the option to seek additional commitments from existing or new lenders to increase the total facility size of the 2010 Credit Agreements to the following maximum amounts: 2010 Missouri Credit Agreement – $1.0 billion; 2010 Genco Credit Agreement – $625 million; and 2010 Illinois Credit Agreement – $1.0 billion. Each of the 2010 Credit Agreements will mature and expire on September 10, 2013. In February 2011, Ameren Illinois received approval from the ICC to extend the expiration of its Borrowing Sublimit under the 2010 Illinois Credit Agreement to September 10, 2013. In June 2011, Ameren Missouri received approval from the MoPSC to extend the expiration of its borrowing sublimit under the 2010 Missouri Credit Agreement to September 10, 2013. The principal amount of each revolving loan owed by a borrower under any of the 2010 Credit Agreements to which it is a party will be due and payable no later than September 10, 2013.

The obligations of all borrowers under the 2010 Credit Agreements are unsecured. Loans are available on a revolving basis under each of the 2010 Credit Agreements and may be repaid and, subject to satisfaction of the conditions to borrowing, reborrowed from time to time. At the election of each borrower, the interest rates on such loans will be the alternate base rate (ABR) plus the margin applicable to the particular borrower and/or the eurodollar rate plus the margin applicable to the particular borrower. The applicable margins will be determined by the borrower's long-term unsecured credit ratings or, if no such ratings are then in effect, the borrower's corporate/issuer ratings then in effect. Letters of credit in an aggregate undrawn face amount not to exceed 25% of the applicable aggregate commitment under the respective 2010 Credit Agreements are also available for issuance for the account of the borrowers thereunder (but within the $2.1 billion overall combined facility borrowing limitations of the 2010 Credit Agreements).

The 2010 Credit Agreements are used to borrow cash, to issue letters of credit, and to support borrowings under Ameren's $500 million commercial paper program, Ameren Missouri's $500 million commercial paper program and Ameren Illinois' $500 million commercial paper program. Any of the 2010 Credit Agreements are available to Ameren to support borrowings under Ameren's commercial paper program, subject to borrowing sublimits. The 2010 Missouri Credit Agreement is available to support borrowings under Ameren Missouri's commercial paper program, and the 2010 Illinois Credit Agreement is available to support borrowings under Ameren Illinois' commercial paper program. At December 31, 2011, Ameren had $148 million of commercial paper outstanding and $15 million of letters of credit outstanding, and Ameren Missouri and Ameren Illinois had no commercial paper or letters of credit outstanding. Based on outstanding borrowings and letters of credit issued under the 2010 Credit Agreements as of December 31, 2011, as well as commercial paper outstanding as of such date, the aggregate amount of credit capacity available under the 2010 Credit Agreements at December 31, 2011, was $1.9 billion.

$20 Million Credit Facility (Terminated)

On June 2, 2010, Ameren entered into a $20 million revolving credit facility ($20 Million Facility). Borrowings under the $20 Million Facility incurred interest at a rate equal to the applicable LIBOR plus 2.25% per annum. The obligations of Ameren under the $20 Million Facility were unsecured. No subsidiary of Ameren was a party to, guarantor of, or borrower under the facility. Ameren had no outstanding borrowings under the facility as of December 31, 2011. Ameren terminated the $20 Million Facility in January 2012. During the years ended December 31, 2011 and 2010, Ameren had average daily balances outstanding of $20 million, with a weighted-average interest rate of 2.48% and 2.54%, respectively.

Commercial Paper

At December 31, 2011, and 2010, Ameren had $148 million and $269 million of commercial paper outstanding, respectively. During the years ended December 31, 2011 and 2010, Ameren had average daily commercial paper balances outstanding of $311 million and $185 million with a weighted-average interest rate of 0.87% and 0.94%, respectively. The peak short-term commercial paper outstanding during the years ended December 31, 2011, and 2010 were $435 million and $366 million, respectively. The peak interest rate for both years was 1.46%. During 2010, the commercial paper was issued only from July through December.

Indebtedness Provisions and Other Covenants

The information below presents a summary of the Ameren Companies' compliance with indebtedness provisions and other covenants.

 

The 2010 Credit Agreements contain conditions about borrowings and issuances of letters of credit, including the absence of default or unmatured default, material accuracy of representations and warranties (excluding any representation after the closing date as to the absence of material adverse change and material litigation), and obtaining required regulatory authorizations. In addition, solely as it relates to borrowings under the 2010 Illinois Credit Agreement, it is a condition for any such borrowing that, at the time of and after giving effect to such borrowing, the borrower not be in violation of any limitation on its ability to incur unsecured indebtedness contained in its articles of incorporation. The 2010 Credit Agreements also contain nonfinancial covenants, including restrictions on the ability to incur liens, to transact with affiliates, to dispose of assets, to make investments in or transfer assets to its affiliates, and to merge with other entities.

The 2010 Credit Agreements require each of Ameren, Ameren Missouri, Ameren Illinois and Genco to maintain consolidated indebtedness of not more than 65% of its consolidated total capitalization pursuant to a defined calculation set forth in the agreements. As of December 31, 2011, the ratios of consolidated indebtedness to total consolidated capitalization, calculated in accordance with the provisions of the 2010 Credit Agreements, were 47%, 48%, 41% and 45%, for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. In addition, under the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, Ameren is required to maintain a ratio of consolidated funds from operations plus interest expense to consolidated interest expense of 2.0 to 1.0, to be calculated quarterly, as of the end of the most recent four fiscal quarters then ending, in accordance with the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, as applicable. Ameren's ratio as of December 31, 2011 was 5.1 to 1.0. Failure of a borrower to satisfy a financial covenant constitutes an immediate default under the applicable 2010 Credit Agreement.

The 2010 Credit Agreements contain default provisions. Defaults under the 2010 Credit Agreements apply separately to each borrower; except however, that a default by Ameren Missouri, Ameren Illinois or Genco under any of the 2010 Credit Agreements will also constitute a default by Ameren under such agreement. Defaults include a cross default with respect to a borrower under the applicable 2010 Credit Agreements if that borrower defaults under any other agreement covering outstanding indebtedness of itself and certain subsidiaries (other than project finance subsidiaries and nonmaterial subsidiaries) in excess of $25 million in the aggregate. Any default of Ameren under any 2010 Credit Agreement that exists solely as a result of a default by Ameren Missouri, Ameren Illinois or Genco thereunder will not constitute a default under any other 2010 Credit Agreement while Ameren is otherwise in compliance with all of its obligations under such other 2010 Credit Agreement. Further, a default at the Ameren level under any 2010 Credit Agreement does not trigger a default by Ameren Missouri, Ameren Illinois or Genco under such agreement.

None of the Ameren Companies' credit facilities or other financing arrangements contains credit rating triggers that would cause an event of default or acceleration of repayment of outstanding balances. At December 31, 2011, management believes that the Ameren Companies were in compliance with the provisions and covenants of their credit facilities.

Money Pools

Ameren has money pool agreements with and among its subsidiaries to coordinate and provide for certain short-term cash and working capital requirements. Separate money pools are maintained for utility and non-state-regulated entities. Ameren Services is responsible for the operation and administration of the money pool agreements.

Utility

Ameren Missouri, Ameren Illinois and Ameren Services may participate in the utility money pool as both lenders and borrowers. Ameren and AERG may participate in the utility money pool only as lenders. Ameren Services administers the utility money pool and tracks internal and external funds separately. Internal funds are surplus funds contributed to the utility money pool from participants. The primary sources of external funds for the utility money pool are the 2010 Credit Agreements and the commercial paper programs. The total amount available to the pool participants from the utility money pool at any given time is reduced by the amount of borrowings by participants, but increased to the extent that the pool participants advance surplus funds to the utility money pool or remit funds from other external sources. The availability of funds is also determined by funding requirement limits established by regulatory authorizations. The utility money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the utility money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the utility money pool. There were no utility money pool borrowings during the years ended December 31, 2011 and 2010.

 

Non-state-regulated Subsidiaries

Ameren, Ameren Services, AER, Genco, AERG, Marketing Company, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company authorization and applicable regulatory short-term borrowing authorizations, to access funding from the 2010 Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool, except for Ameren Services, which may participate only as a borrower. The total amount available to the pool participants at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. The average interest rate for borrowing under the non-state-regulated subsidiary money pool for the year ended December 31, 2011, was 0.77% (2010 – 0.77%).

See Note 14 – Related Party Transactions for the amount of interest income and expense from the money pool arrangements recorded by the Ameren Companies for the years ended December 31, 2011, 2010, and 2009.

Unilateral Borrowing Agreement

In addition, a unilateral borrowing agreement exists among Ameren, Ameren Illinois, and Ameren Services, which enables Ameren Illinois to make short-term borrowings directly from Ameren. The aggregate amount of borrowings outstanding at any time by Ameren Illinois under the unilateral borrowing agreement and the utility money pool agreement, together with any outstanding Ameren Illinois external credit facility borrowings or commercial paper issuances, may not exceed $500 million, pursuant to authorization from the ICC. Ameren Illinois is not currently borrowing under the unilateral borrowing agreement. Ameren Services is responsible for operation and administration of the unilateral borrowing agreement.

NOTE 4 – SHORT-TERM DEBT AND LIQUIDITY

The liquidity needs of the Ameren Companies are typically supported through the use of available cash, short-term intercompany borrowings, drawings under committed bank credit facilities, or commercial paper issuances.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Missouri Credit Agreement described below for the year ended December 31, 2011, and excludes letters of credit issued under the credit agreement:

 

2010 Missouri Credit Agreement ($800 million)

   Ameren (Parent)     Ameren Missouri      Total  

2011:

       

Average daily borrowings outstanding during 2011

   $ 105      $ —         $ 105   

Outstanding credit facility borrowings at period end

     —          —           —     

Weighted-average interest rate during 2011

     2.30     —           2.30

Peak credit facility borrowings during 2011(a )

   $ 340      $ —         $ 340   

Peak interest rate during 2011

     4.30     —           4.30

2010:

       

Average daily borrowings outstanding during 2010(b )

   $ 195      $ —         $ 195   

Outstanding credit facility borrowings at period end

     340        —           340   

Weighted-average interest rate during 2010( b)

     2.31     —           2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 380      $ —         $ 380   

Peak interest rate during 2010(b )

     2.31     —           2.31

 

(a) The timing of peak credit facility borrowings varies by company and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Genco Credit Agreement described below for the year ended December 31, 2011:

 

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2011:

      

Average daily borrowings outstanding during 2011

   $ —        $ 41      $ 41   

Outstanding credit facility borrowings at period end

     —          —          —     

Weighted-average interest rate during 2011

     —          2.30     2.30

Peak credit facility borrowings during 2011(a)

   $ —        $ 100      $ 100   

Peak interest rate during 2011

     —          2.31     2.31

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2010:

      

Average daily borrowings outstanding during 2010(b )

   $ 36      $ 54      $ 90   

Outstanding credit facility borrowings at period end

     —          100        100   

Weighted-average interest rate during 2010(b )

     2.30     2.31     2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 385      $ 100      $ 385   

Peak interest rate during 2010(b )

     2.31     2.31     2.31

 

(a) The timing of peak credit facility borrowings varies by company, and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

Neither Ameren nor Ameren Illinois borrowed under the 2010 Illinois Credit Agreement during the years ended December 31, 2011, and 2010, respectively.

2010 Credit Agreements

Ameren and certain of its subsidiaries entered into multiyear credit facility agreements with a large and diverse group of lenders in 2010. These facilities cumulatively provide $2.1 billion of credit through September 10, 2013. The facilities currently include 25 international, national, and regional lenders, with no lender providing more than $125 million of credit in aggregate.

 

On September 10, 2010, Ameren and Ameren Missouri entered into the $800 million 2010 Missouri Credit Agreement. On September 10, 2010, Ameren and Genco entered into the $500 million 2010 Genco Credit Agreement.

Also on September 10, 2010, Ameren and Ameren Illinois, as successor company to CIPS, CILCO and IP, entered into the $800 million 2010 Illinois Credit Agreement.

 

The obligations of each borrower under the respective 2010 Credit Agreements to which it is a party are several and not joint, and, except under limited circumstances relating to expenses and indemnities, the obligations of Ameren Missouri, Ameren Illinois and Genco under the respective 2010 Credit Agreements are not guaranteed by Ameren or any other subsidiary of Ameren. The maximum aggregate amount available to each borrower under each facility is shown in the following table (such amount being such borrower's "Borrowing Sublimit"):

 

     2010
Missouri
Credit
Agreement
    2010
Genco
Credit
Agreement
    2010
Illinois
Credit
Agreement
 

Ameren

   $ 500      $ 500      $ 300   

Ameren Missouri

     500        (a     (a

Ameren Illinois

     (a     (a     800   

Genco

     (a     500        (a

 

(a) Not applicable.

Ameren has the option to seek additional commitments from existing or new lenders to increase the total facility size of the 2010 Credit Agreements to the following maximum amounts: 2010 Missouri Credit Agreement – $1.0 billion; 2010 Genco Credit Agreement – $625 million; and 2010 Illinois Credit Agreement – $1.0 billion. Each of the 2010 Credit Agreements will mature and expire on September 10, 2013. In February 2011, Ameren Illinois received approval from the ICC to extend the expiration of its Borrowing Sublimit under the 2010 Illinois Credit Agreement to September 10, 2013. In June 2011, Ameren Missouri received approval from the MoPSC to extend the expiration of its borrowing sublimit under the 2010 Missouri Credit Agreement to September 10, 2013. The principal amount of each revolving loan owed by a borrower under any of the 2010 Credit Agreements to which it is a party will be due and payable no later than September 10, 2013.

The obligations of all borrowers under the 2010 Credit Agreements are unsecured. Loans are available on a revolving basis under each of the 2010 Credit Agreements and may be repaid and, subject to satisfaction of the conditions to borrowing, reborrowed from time to time. At the election of each borrower, the interest rates on such loans will be the alternate base rate (ABR) plus the margin applicable to the particular borrower and/or the eurodollar rate plus the margin applicable to the particular borrower. The applicable margins will be determined by the borrower's long-term unsecured credit ratings or, if no such ratings are then in effect, the borrower's corporate/issuer ratings then in effect. Letters of credit in an aggregate undrawn face amount not to exceed 25% of the applicable aggregate commitment under the respective 2010 Credit Agreements are also available for issuance for the account of the borrowers thereunder (but within the $2.1 billion overall combined facility borrowing limitations of the 2010 Credit Agreements).

The 2010 Credit Agreements are used to borrow cash, to issue letters of credit, and to support borrowings under Ameren's $500 million commercial paper program, Ameren Missouri's $500 million commercial paper program and Ameren Illinois' $500 million commercial paper program. Any of the 2010 Credit Agreements are available to Ameren to support borrowings under Ameren's commercial paper program, subject to borrowing sublimits. The 2010 Missouri Credit Agreement is available to support borrowings under Ameren Missouri's commercial paper program, and the 2010 Illinois Credit Agreement is available to support borrowings under Ameren Illinois' commercial paper program. At December 31, 2011, Ameren had $148 million of commercial paper outstanding and $15 million of letters of credit outstanding, and Ameren Missouri and Ameren Illinois had no commercial paper or letters of credit outstanding. Based on outstanding borrowings and letters of credit issued under the 2010 Credit Agreements as of December 31, 2011, as well as commercial paper outstanding as of such date, the aggregate amount of credit capacity available under the 2010 Credit Agreements at December 31, 2011, was $1.9 billion.

$20 Million Credit Facility (Terminated)

On June 2, 2010, Ameren entered into a $20 million revolving credit facility ($20 Million Facility). Borrowings under the $20 Million Facility incurred interest at a rate equal to the applicable LIBOR plus 2.25% per annum. The obligations of Ameren under the $20 Million Facility were unsecured. No subsidiary of Ameren was a party to, guarantor of, or borrower under the facility. Ameren had no outstanding borrowings under the facility as of December 31, 2011. Ameren terminated the $20 Million Facility in January 2012. During the years ended December 31, 2011 and 2010, Ameren had average daily balances outstanding of $20 million, with a weighted-average interest rate of 2.48% and 2.54%, respectively.

Commercial Paper

At December 31, 2011, and 2010, Ameren had $148 million and $269 million of commercial paper outstanding, respectively. During the years ended December 31, 2011 and 2010, Ameren had average daily commercial paper balances outstanding of $311 million and $185 million with a weighted-average interest rate of 0.87% and 0.94%, respectively. The peak short-term commercial paper outstanding during the years ended December 31, 2011, and 2010 were $435 million and $366 million, respectively. The peak interest rate for both years was 1.46%. During 2010, the commercial paper was issued only from July through December.

Indebtedness Provisions and Other Covenants

The information below presents a summary of the Ameren Companies' compliance with indebtedness provisions and other covenants.

 

The 2010 Credit Agreements contain conditions about borrowings and issuances of letters of credit, including the absence of default or unmatured default, material accuracy of representations and warranties (excluding any representation after the closing date as to the absence of material adverse change and material litigation), and obtaining required regulatory authorizations. In addition, solely as it relates to borrowings under the 2010 Illinois Credit Agreement, it is a condition for any such borrowing that, at the time of and after giving effect to such borrowing, the borrower not be in violation of any limitation on its ability to incur unsecured indebtedness contained in its articles of incorporation. The 2010 Credit Agreements also contain nonfinancial covenants, including restrictions on the ability to incur liens, to transact with affiliates, to dispose of assets, to make investments in or transfer assets to its affiliates, and to merge with other entities.

The 2010 Credit Agreements require each of Ameren, Ameren Missouri, Ameren Illinois and Genco to maintain consolidated indebtedness of not more than 65% of its consolidated total capitalization pursuant to a defined calculation set forth in the agreements. As of December 31, 2011, the ratios of consolidated indebtedness to total consolidated capitalization, calculated in accordance with the provisions of the 2010 Credit Agreements, were 47%, 48%, 41% and 45%, for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. In addition, under the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, Ameren is required to maintain a ratio of consolidated funds from operations plus interest expense to consolidated interest expense of 2.0 to 1.0, to be calculated quarterly, as of the end of the most recent four fiscal quarters then ending, in accordance with the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, as applicable. Ameren's ratio as of December 31, 2011 was 5.1 to 1.0. Failure of a borrower to satisfy a financial covenant constitutes an immediate default under the applicable 2010 Credit Agreement.

The 2010 Credit Agreements contain default provisions. Defaults under the 2010 Credit Agreements apply separately to each borrower; except however, that a default by Ameren Missouri, Ameren Illinois or Genco under any of the 2010 Credit Agreements will also constitute a default by Ameren under such agreement. Defaults include a cross default with respect to a borrower under the applicable 2010 Credit Agreements if that borrower defaults under any other agreement covering outstanding indebtedness of itself and certain subsidiaries (other than project finance subsidiaries and nonmaterial subsidiaries) in excess of $25 million in the aggregate. Any default of Ameren under any 2010 Credit Agreement that exists solely as a result of a default by Ameren Missouri, Ameren Illinois or Genco thereunder will not constitute a default under any other 2010 Credit Agreement while Ameren is otherwise in compliance with all of its obligations under such other 2010 Credit Agreement. Further, a default at the Ameren level under any 2010 Credit Agreement does not trigger a default by Ameren Missouri, Ameren Illinois or Genco under such agreement.

None of the Ameren Companies' credit facilities or other financing arrangements contains credit rating triggers that would cause an event of default or acceleration of repayment of outstanding balances. At December 31, 2011, management believes that the Ameren Companies were in compliance with the provisions and covenants of its credit facilities.

Money Pools

Ameren has money pool agreements with and among its subsidiaries to coordinate and provide for certain short-term cash and working capital requirements. Separate money pools are maintained for utility and non-state-regulated entities. Ameren Services is responsible for the operation and administration of the money pool agreements.

Utility

Ameren Missouri, Ameren Illinois and Ameren Services may participate in the utility money pool as both lenders and borrowers. Ameren and AERG may participate in the utility money pool only as lenders. Ameren Services administers the utility money pool and tracks internal and external funds separately. Internal funds are surplus funds contributed to the utility money pool from participants. The primary sources of external funds for the utility money pool are the 2010 Credit Agreements and the commercial paper programs. The total amount available to the pool participants from the utility money pool at any given time is reduced by the amount of borrowings by participants, but increased to the extent that the pool participants advance surplus funds to the utility money pool or remit funds from other external sources. The availability of funds is also determined by funding requirement limits established by regulatory authorizations. The utility money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the utility money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the utility money pool. There were no utility money pool borrowings during the years ended December 31, 2011 and 2010.

 

Non-state-regulated Subsidiaries

Ameren, Ameren Services, AER, Genco, AERG, Marketing Company, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company authorization and applicable regulatory short-term borrowing authorizations, to access funding from the 2010 Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool, except for Ameren Services, which may participate only as a borrower. The total amount available to the pool participants at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. The average interest rate for borrowing under the non-state-regulated subsidiary money pool for the year ended December 31, 2011, was 0.77% (2010 – 0.77%).

See Note 14 – Related Party Transactions for the amount of interest income and expense from the money pool arrangements recorded by the Ameren Companies for the years ended December 31, 2011, 2010, and 2009.

Unilateral Borrowing Agreement

In addition, a unilateral borrowing agreement exists among Ameren, Ameren Illinois, and Ameren Services, which enables Ameren Illinois to make short-term borrowings directly from Ameren. The aggregate amount of borrowings outstanding at any time by Ameren Illinois under the unilateral borrowing agreement and the utility money pool agreement, together with any outstanding Ameren Illinois external credit facility borrowings or commercial paper issuances, may not exceed $500 million, pursuant to authorization from the ICC. Ameren Illinois is not currently borrowing under the unilateral borrowing agreement. Ameren Services is responsible for operation and administration of the unilateral borrowing agreement.

 

NOTE 4 – SHORT-TERM DEBT AND LIQUIDITY

The liquidity needs of the Ameren Companies are typically supported through the use of available cash, short-term intercompany borrowings, drawings under committed bank credit facilities, or commercial paper issuances.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Missouri Credit Agreement described below for the year ended December 31, 2011, and excludes letters of credit issued under the credit agreement:

 

2010 Missouri Credit Agreement ($800 million)

   Ameren (Parent)     Ameren Missouri      Total  

2011:

       

Average daily borrowings outstanding during 2011

   $ 105      $ —         $ 105   

Outstanding credit facility borrowings at period end

     —          —           —     

Weighted-average interest rate during 2011

     2.30     —           2.30

Peak credit facility borrowings during 2011(a )

   $ 340      $ —         $ 340   

Peak interest rate during 2011

     4.30     —           4.30

2010:

       

Average daily borrowings outstanding during 2010(b )

   $ 195      $ —         $ 195   

Outstanding credit facility borrowings at period end

     340        —           340   

Weighted-average interest rate during 2010( b)

     2.31     —           2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 380      $ —         $ 380   

Peak interest rate during 2010(b )

     2.31     —           2.31

 

(a) The timing of peak credit facility borrowings varies by company and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Genco Credit Agreement described below for the year ended December 31, 2011:

 

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2011:

      

Average daily borrowings outstanding during 2011

   $ —        $ 41      $ 41   

Outstanding credit facility borrowings at period end

     —          —          —     

Weighted-average interest rate during 2011

     —          2.30     2.30

Peak credit facility borrowings during 2011(a)

   $ —        $ 100      $ 100   

Peak interest rate during 2011

     —          2.31     2.31

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2010:

      

Average daily borrowings outstanding during 2010(b )

   $ 36      $ 54      $ 90   

Outstanding credit facility borrowings at period end

     —          100        100   

Weighted-average interest rate during 2010(b )

     2.30     2.31     2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 385      $ 100      $ 385   

Peak interest rate during 2010(b )

     2.31     2.31     2.31

 

(a) The timing of peak credit facility borrowings varies by company, and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

Neither Ameren nor Ameren Illinois borrowed under the 2010 Illinois Credit Agreement during the years ended December 31, 2011, and 2010, respectively.

2010 Credit Agreements

Ameren and certain of its subsidiaries entered into multiyear credit facility agreements with a large and diverse group of lenders in 2010. These facilities cumulatively provide $2.1 billion of credit through September 10, 2013. The facilities currently include 25 international, national, and regional lenders, with no lender providing more than $125 million of credit in aggregate.

 

On September 10, 2010, Ameren and Ameren Missouri entered into the $800 million 2010 Missouri Credit Agreement. On September 10, 2010, Ameren and Genco entered into the $500 million 2010 Genco Credit Agreement.

Also on September 10, 2010, Ameren and Ameren Illinois, as successor company to CIPS, CILCO and IP, entered into the $800 million 2010 Illinois Credit Agreement.

 

The obligations of each borrower under the respective 2010 Credit Agreements to which it is a party are several and not joint, and, except under limited circumstances relating to expenses and indemnities, the obligations of Ameren Missouri, Ameren Illinois and Genco under the respective 2010 Credit Agreements are not guaranteed by Ameren or any other subsidiary of Ameren. The maximum aggregate amount available to each borrower under each facility is shown in the following table (such amount being such borrower's "Borrowing Sublimit"):

 

     2010
Missouri
Credit
Agreement
    2010
Genco
Credit
Agreement
    2010
Illinois
Credit
Agreement
 

Ameren

   $ 500      $ 500      $ 300   

Ameren Missouri

     500        (a     (a

Ameren Illinois

     (a     (a     800   

Genco

     (a     500        (a

 

(a) Not applicable.

Ameren has the option to seek additional commitments from existing or new lenders to increase the total facility size of the 2010 Credit Agreements to the following maximum amounts: 2010 Missouri Credit Agreement – $1.0 billion; 2010 Genco Credit Agreement – $625 million; and 2010 Illinois Credit Agreement – $1.0 billion. Each of the 2010 Credit Agreements will mature and expire on September 10, 2013. In February 2011, Ameren Illinois received approval from the ICC to extend the expiration of its Borrowing Sublimit under the 2010 Illinois Credit Agreement to September 10, 2013. In June 2011, Ameren Missouri received approval from the MoPSC to extend the expiration of its borrowing sublimit under the 2010 Missouri Credit Agreement to September 10, 2013. The principal amount of each revolving loan owed by a borrower under any of the 2010 Credit Agreements to which it is a party will be due and payable no later than September 10, 2013.

The obligations of all borrowers under the 2010 Credit Agreements are unsecured. Loans are available on a revolving basis under each of the 2010 Credit Agreements and may be repaid and, subject to satisfaction of the conditions to borrowing, reborrowed from time to time. At the election of each borrower, the interest rates on such loans will be the alternate base rate (ABR) plus the margin applicable to the particular borrower and/or the eurodollar rate plus the margin applicable to the particular borrower. The applicable margins will be determined by the borrower's long-term unsecured credit ratings or, if no such ratings are then in effect, the borrower's corporate/issuer ratings then in effect. Letters of credit in an aggregate undrawn face amount not to exceed 25% of the applicable aggregate commitment under the respective 2010 Credit Agreements are also available for issuance for the account of the borrowers thereunder (but within the $2.1 billion overall combined facility borrowing limitations of the 2010 Credit Agreements).

The 2010 Credit Agreements are used to borrow cash, to issue letters of credit, and to support borrowings under Ameren's $500 million commercial paper program, Ameren Missouri's $500 million commercial paper program and Ameren Illinois' $500 million commercial paper program. Any of the 2010 Credit Agreements are available to Ameren to support borrowings under Ameren's commercial paper program, subject to borrowing sublimits. The 2010 Missouri Credit Agreement is available to support borrowings under Ameren Missouri's commercial paper program, and the 2010 Illinois Credit Agreement is available to support borrowings under Ameren Illinois' commercial paper program. At December 31, 2011, Ameren had $148 million of commercial paper outstanding and $15 million of letters of credit outstanding, and Ameren Missouri and Ameren Illinois had no commercial paper or letters of credit outstanding. Based on outstanding borrowings and letters of credit issued under the 2010 Credit Agreements as of December 31, 2011, as well as commercial paper outstanding as of such date, the aggregate amount of credit capacity available under the 2010 Credit Agreements at December 31, 2011, was $1.9 billion.

$20 Million Credit Facility (Terminated)

On June 2, 2010, Ameren entered into a $20 million revolving credit facility ($20 Million Facility). Borrowings under the $20 Million Facility incurred interest at a rate equal to the applicable LIBOR plus 2.25% per annum. The obligations of Ameren under the $20 Million Facility were unsecured. No subsidiary of Ameren was a party to, guarantor of, or borrower under the facility. Ameren had no outstanding borrowings under the facility as of December 31, 2011. Ameren terminated the $20 Million Facility in January 2012. During the years ended December 31, 2011 and 2010, Ameren had average daily balances outstanding of $20 million, with a weighted-average interest rate of 2.48% and 2.54%, respectively.

Commercial Paper

At December 31, 2011, and 2010, Ameren had $148 million and $269 million of commercial paper outstanding, respectively. During the years ended December 31, 2011 and 2010, Ameren had average daily commercial paper balances outstanding of $311 million and $185 million with a weighted-average interest rate of 0.87% and 0.94%, respectively. The peak short-term commercial paper outstanding during the years ended December 31, 2011, and 2010 were $435 million and $366 million, respectively. The peak interest rate for both years was 1.46%. During 2010, the commercial paper was issued only from July through December.

Indebtedness Provisions and Other Covenants

The information below presents a summary of the Ameren Companies' compliance with indebtedness provisions and other covenants.

 

The 2010 Credit Agreements contain conditions about borrowings and issuances of letters of credit, including the absence of default or unmatured default, material accuracy of representations and warranties (excluding any representation after the closing date as to the absence of material adverse change and material litigation), and obtaining required regulatory authorizations. In addition, solely as it relates to borrowings under the 2010 Illinois Credit Agreement, it is a condition for any such borrowing that, at the time of and after giving effect to such borrowing, the borrower not be in violation of any limitation on its ability to incur unsecured indebtedness contained in its articles of incorporation. The 2010 Credit Agreements also contain nonfinancial covenants, including restrictions on the ability to incur liens, to transact with affiliates, to dispose of assets, to make investments in or transfer assets to its affiliates, and to merge with other entities.

The 2010 Credit Agreements require each of Ameren, Ameren Missouri, Ameren Illinois and Genco to maintain consolidated indebtedness of not more than 65% of its consolidated total capitalization pursuant to a defined calculation set forth in the agreements. As of December 31, 2011, the ratios of consolidated indebtedness to total consolidated capitalization, calculated in accordance with the provisions of the 2010 Credit Agreements, were 47%, 48%, 41% and 45%, for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. In addition, under the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, Ameren is required to maintain a ratio of consolidated funds from operations plus interest expense to consolidated interest expense of 2.0 to 1.0, to be calculated quarterly, as of the end of the most recent four fiscal quarters then ending, in accordance with the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, as applicable. Ameren's ratio as of December 31, 2011 was 5.1 to 1.0. Failure of a borrower to satisfy a financial covenant constitutes an immediate default under the applicable 2010 Credit Agreement.

The 2010 Credit Agreements contain default provisions. Defaults under the 2010 Credit Agreements apply separately to each borrower; except however, that a default by Ameren Missouri, Ameren Illinois or Genco under any of the 2010 Credit Agreements will also constitute a default by Ameren under such agreement. Defaults include a cross default with respect to a borrower under the applicable 2010 Credit Agreements if that borrower defaults under any other agreement covering outstanding indebtedness of itself and certain subsidiaries (other than project finance subsidiaries and nonmaterial subsidiaries) in excess of $25 million in the aggregate. Any default of Ameren under any 2010 Credit Agreement that exists solely as a result of a default by Ameren Missouri, Ameren Illinois or Genco thereunder will not constitute a default under any other 2010 Credit Agreement while Ameren is otherwise in compliance with all of its obligations under such other 2010 Credit Agreement. Further, a default at the Ameren level under any 2010 Credit Agreement does not trigger a default by Ameren Missouri, Ameren Illinois or Genco under such agreement.

None of the Ameren Companies' credit facilities or other financing arrangements contains credit rating triggers that would cause an event of default or acceleration of repayment of outstanding balances. At December 31, 2011, management believes that the Ameren Companies were in compliance with the provisions and covenants of their credit facilities.

Money Pools

Ameren has money pool agreements with and among its subsidiaries to coordinate and provide for certain short-term cash and working capital requirements. Separate money pools are maintained for utility and non-state-regulated entities. Ameren Services is responsible for the operation and administration of the money pool agreements.

Utility

Ameren Missouri, Ameren Illinois and Ameren Services may participate in the utility money pool as both lenders and borrowers. Ameren and AERG may participate in the utility money pool only as lenders. Ameren Services administers the utility money pool and tracks internal and external funds separately. Internal funds are surplus funds contributed to the utility money pool from participants. The primary sources of external funds for the utility money pool are the 2010 Credit Agreements and the commercial paper programs. The total amount available to the pool participants from the utility money pool at any given time is reduced by the amount of borrowings by participants, but increased to the extent that the pool participants advance surplus funds to the utility money pool or remit funds from other external sources. The availability of funds is also determined by funding requirement limits established by regulatory authorizations. The utility money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the utility money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the utility money pool. There were no utility money pool borrowings during the years ended December 31, 2011 and 2010.

 

Non-state-regulated Subsidiaries

Ameren, Ameren Services, AER, Genco, AERG, Marketing Company, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company authorization and applicable regulatory short-term borrowing authorizations, to access funding from the 2010 Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool, except for Ameren Services, which may participate only as a borrower. The total amount available to the pool participants at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. The average interest rate for borrowing under the non-state-regulated subsidiary money pool for the year ended December 31, 2011, was 0.77% (2010 – 0.77%).

See Note 14 – Related Party Transactions for the amount of interest income and expense from the money pool arrangements recorded by the Ameren Companies for the years ended December 31, 2011, 2010, and 2009.

Unilateral Borrowing Agreement

In addition, a unilateral borrowing agreement exists among Ameren, Ameren Illinois, and Ameren Services, which enables Ameren Illinois to make short-term borrowings directly from Ameren. The aggregate amount of borrowings outstanding at any time by Ameren Illinois under the unilateral borrowing agreement and the utility money pool agreement, together with any outstanding Ameren Illinois external credit facility borrowings or commercial paper issuances, may not exceed $500 million, pursuant to authorization from the ICC. Ameren Illinois is not currently borrowing under the unilateral borrowing agreement. Ameren Services is responsible for operation and administration of the unilateral borrowing agreement.

 

NOTE 4 – SHORT-TERM DEBT AND LIQUIDITY

The liquidity needs of the Ameren Companies are typically supported through the use of available cash, short-term intercompany borrowings, drawings under committed bank credit facilities, or commercial paper issuances.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Missouri Credit Agreement described below for the year ended December 31, 2011, and excludes letters of credit issued under the credit agreement:

 

2010 Missouri Credit Agreement ($800 million)

   Ameren (Parent)     Ameren Missouri      Total  

2011:

       

Average daily borrowings outstanding during 2011

   $ 105      $ —         $ 105   

Outstanding credit facility borrowings at period end

     —          —           —     

Weighted-average interest rate during 2011

     2.30     —           2.30

Peak credit facility borrowings during 2011(a )

   $ 340      $ —         $ 340   

Peak interest rate during 2011

     4.30     —           4.30

2010:

       

Average daily borrowings outstanding during 2010(b )

   $ 195      $ —         $ 195   

Outstanding credit facility borrowings at period end

     340        —           340   

Weighted-average interest rate during 2010( b)

     2.31     —           2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 380      $ —         $ 380   

Peak interest rate during 2010(b )

     2.31     —           2.31

 

(a) The timing of peak credit facility borrowings varies by company and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

The following table summarizes the borrowing activity and relevant interest rates under the 2010 Genco Credit Agreement described below for the year ended December 31, 2011:

 

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2011:

      

Average daily borrowings outstanding during 2011

   $ —        $ 41      $ 41   

Outstanding credit facility borrowings at period end

     —          —          —     

Weighted-average interest rate during 2011

     —          2.30     2.30

Peak credit facility borrowings during 2011(a)

   $ —        $ 100      $ 100   

Peak interest rate during 2011

     —          2.31     2.31

2010 Genco Credit Agreement ($500 million)

   Ameren (Parent)     Genco     Total  

2010:

      

Average daily borrowings outstanding during 2010(b )

   $ 36      $ 54      $ 90   

Outstanding credit facility borrowings at period end

     —          100        100   

Weighted-average interest rate during 2010(b )

     2.30     2.31     2.31

Peak credit facility borrowings during 2010(a)(b)

   $ 385      $ 100      $ 385   

Peak interest rate during 2010(b )

     2.31     2.31     2.31

 

(a) The timing of peak credit facility borrowings varies by company, and therefore the amounts presented by company might not equal the total peak credit facility borrowings for the period. The simultaneous peak credit facility borrowings by the Ameren Companies under all credit facilities during 2011 and 2010 were $460 million and $925 million, respectively.
(b) Calculated from the September 10, 2010, inception date through December 31, 2010.

Neither Ameren nor Ameren Illinois borrowed under the 2010 Illinois Credit Agreement during the years ended December 31, 2011, and 2010, respectively.

2010 Credit Agreements

Ameren and certain of its subsidiaries entered into multiyear credit facility agreements with a large and diverse group of lenders in 2010. These facilities cumulatively provide $2.1 billion of credit through September 10, 2013. The facilities currently include 25 international, national, and regional lenders, with no lender providing more than $125 million of credit in aggregate.

 

On September 10, 2010, Ameren and Ameren Missouri entered into the $800 million 2010 Missouri Credit Agreement. On September 10, 2010, Ameren and Genco entered into the $500 million 2010 Genco Credit Agreement.

Also on September 10, 2010, Ameren and Ameren Illinois, as successor company to CIPS, CILCO and IP, entered into the $800 million 2010 Illinois Credit Agreement.

 

The obligations of each borrower under the respective 2010 Credit Agreements to which it is a party are several and not joint, and, except under limited circumstances relating to expenses and indemnities, the obligations of Ameren Missouri, Ameren Illinois and Genco under the respective 2010 Credit Agreements are not guaranteed by Ameren or any other subsidiary of Ameren. The maximum aggregate amount available to each borrower under each facility is shown in the following table (such amount being such borrower's "Borrowing Sublimit"):

 

     2010
Missouri
Credit
Agreement
    2010
Genco
Credit
Agreement
    2010
Illinois
Credit
Agreement
 

Ameren

   $ 500      $ 500      $ 300   

Ameren Missouri

     500        (a     (a

Ameren Illinois

     (a     (a     800   

Genco

     (a     500        (a

 

(a) Not applicable.

Ameren has the option to seek additional commitments from existing or new lenders to increase the total facility size of the 2010 Credit Agreements to the following maximum amounts: 2010 Missouri Credit Agreement – $1.0 billion; 2010 Genco Credit Agreement – $625 million; and 2010 Illinois Credit Agreement – $1.0 billion. Each of the 2010 Credit Agreements will mature and expire on September 10, 2013. In February 2011, Ameren Illinois received approval from the ICC to extend the expiration of its Borrowing Sublimit under the 2010 Illinois Credit Agreement to September 10, 2013. In June 2011, Ameren Missouri received approval from the MoPSC to extend the expiration of its borrowing sublimit under the 2010 Missouri Credit Agreement to September 10, 2013. The principal amount of each revolving loan owed by a borrower under any of the 2010 Credit Agreements to which it is a party will be due and payable no later than September 10, 2013.

The obligations of all borrowers under the 2010 Credit Agreements are unsecured. Loans are available on a revolving basis under each of the 2010 Credit Agreements and may be repaid and, subject to satisfaction of the conditions to borrowing, reborrowed from time to time. At the election of each borrower, the interest rates on such loans will be the alternate base rate (ABR) plus the margin applicable to the particular borrower and/or the eurodollar rate plus the margin applicable to the particular borrower. The applicable margins will be determined by the borrower's long-term unsecured credit ratings or, if no such ratings are then in effect, the borrower's corporate/issuer ratings then in effect. Letters of credit in an aggregate undrawn face amount not to exceed 25% of the applicable aggregate commitment under the respective 2010 Credit Agreements are also available for issuance for the account of the borrowers thereunder (but within the $2.1 billion overall combined facility borrowing limitations of the 2010 Credit Agreements).

The 2010 Credit Agreements are used to borrow cash, to issue letters of credit, and to support borrowings under Ameren's $500 million commercial paper program, Ameren Missouri's $500 million commercial paper program and Ameren Illinois' $500 million commercial paper program. Any of the 2010 Credit Agreements are available to Ameren to support borrowings under Ameren's commercial paper program, subject to borrowing sublimits. The 2010 Missouri Credit Agreement is available to support borrowings under Ameren Missouri's commercial paper program, and the 2010 Illinois Credit Agreement is available to support borrowings under Ameren Illinois' commercial paper program. At December 31, 2011, Ameren had $148 million of commercial paper outstanding and $15 million of letters of credit outstanding, and Ameren Missouri and Ameren Illinois had no commercial paper or letters of credit outstanding. Based on outstanding borrowings and letters of credit issued under the 2010 Credit Agreements as of December 31, 2011, as well as commercial paper outstanding as of such date, the aggregate amount of credit capacity available under the 2010 Credit Agreements at December 31, 2011, was $1.9 billion.

$20 Million Credit Facility (Terminated)

On June 2, 2010, Ameren entered into a $20 million revolving credit facility ($20 Million Facility). Borrowings under the $20 Million Facility incurred interest at a rate equal to the applicable LIBOR plus 2.25% per annum. The obligations of Ameren under the $20 Million Facility were unsecured. No subsidiary of Ameren was a party to, guarantor of, or borrower under the facility. Ameren had no outstanding borrowings under the facility as of December 31, 2011. Ameren terminated the $20 Million Facility in January 2012. During the years ended December 31, 2011 and 2010, Ameren had average daily balances outstanding of $20 million, with a weighted-average interest rate of 2.48% and 2.54%, respectively.

Commercial Paper

At December 31, 2011, and 2010, Ameren had $148 million and $269 million of commercial paper outstanding, respectively. During the years ended December 31, 2011 and 2010, Ameren had average daily commercial paper balances outstanding of $311 million and $185 million with a weighted-average interest rate of 0.87% and 0.94%, respectively. The peak short-term commercial paper outstanding during the years ended December 31, 2011, and 2010 were $435 million and $366 million, respectively. The peak interest rate for both years was 1.46%. During 2010, the commercial paper was issued only from July through December.

Indebtedness Provisions and Other Covenants

The information below presents a summary of the Ameren Companies' compliance with indebtedness provisions and other covenants.

 

The 2010 Credit Agreements contain conditions about borrowings and issuances of letters of credit, including the absence of default or unmatured default, material accuracy of representations and warranties (excluding any representation after the closing date as to the absence of material adverse change and material litigation), and obtaining required regulatory authorizations. In addition, solely as it relates to borrowings under the 2010 Illinois Credit Agreement, it is a condition for any such borrowing that, at the time of and after giving effect to such borrowing, the borrower not be in violation of any limitation on its ability to incur unsecured indebtedness contained in its articles of incorporation. The 2010 Credit Agreements also contain nonfinancial covenants, including restrictions on the ability to incur liens, to transact with affiliates, to dispose of assets, to make investments in or transfer assets to its affiliates, and to merge with other entities.

The 2010 Credit Agreements require each of Ameren, Ameren Missouri, Ameren Illinois and Genco to maintain consolidated indebtedness of not more than 65% of its consolidated total capitalization pursuant to a defined calculation set forth in the agreements. As of December 31, 2011, the ratios of consolidated indebtedness to total consolidated capitalization, calculated in accordance with the provisions of the 2010 Credit Agreements, were 47%, 48%, 41% and 45%, for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. In addition, under the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, Ameren is required to maintain a ratio of consolidated funds from operations plus interest expense to consolidated interest expense of 2.0 to 1.0, to be calculated quarterly, as of the end of the most recent four fiscal quarters then ending, in accordance with the 2010 Genco Credit Agreement and the 2010 Illinois Credit Agreement, as applicable. Ameren's ratio as of December 31, 2011 was 5.1 to 1.0. Failure of a borrower to satisfy a financial covenant constitutes an immediate default under the applicable 2010 Credit Agreement.

The 2010 Credit Agreements contain default provisions. Defaults under the 2010 Credit Agreements apply separately to each borrower; except however, that a default by Ameren Missouri, Ameren Illinois or Genco under any of the 2010 Credit Agreements will also constitute a default by Ameren under such agreement. Defaults include a cross default with respect to a borrower under the applicable 2010 Credit Agreements if that borrower defaults under any other agreement covering outstanding indebtedness of itself and certain subsidiaries (other than project finance subsidiaries and nonmaterial subsidiaries) in excess of $25 million in the aggregate. Any default of Ameren under any 2010 Credit Agreement that exists solely as a result of a default by Ameren Missouri, Ameren Illinois or Genco thereunder will not constitute a default under any other 2010 Credit Agreement while Ameren is otherwise in compliance with all of its obligations under such other 2010 Credit Agreement. Further, a default at the Ameren level under any 2010 Credit Agreement does not trigger a default by Ameren Missouri, Ameren Illinois or Genco under such agreement.

None of the Ameren Companies' credit facilities or other financing arrangements contains credit rating triggers that would cause an event of default or acceleration of repayment of outstanding balances. At December 31, 2011, management believes that the Ameren Companies were in compliance with the provisions and covenants of their credit facilities.

Money Pools

Ameren has money pool agreements with and among its subsidiaries to coordinate and provide for certain short-term cash and working capital requirements. Separate money pools are maintained for utility and non-state-regulated entities. Ameren Services is responsible for the operation and administration of the money pool agreements.

Utility

Ameren Missouri, Ameren Illinois and Ameren Services may participate in the utility money pool as both lenders and borrowers. Ameren and AERG may participate in the utility money pool only as lenders. Ameren Services administers the utility money pool and tracks internal and external funds separately. Internal funds are surplus funds contributed to the utility money pool from participants. The primary sources of external funds for the utility money pool are the 2010 Credit Agreements and the commercial paper programs. The total amount available to the pool participants from the utility money pool at any given time is reduced by the amount of borrowings by participants, but increased to the extent that the pool participants advance surplus funds to the utility money pool or remit funds from other external sources. The availability of funds is also determined by funding requirement limits established by regulatory authorizations. The utility money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the utility money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the utility money pool. There were no utility money pool borrowings during the years ended December 31, 2011 and 2010.

 

Non-state-regulated Subsidiaries

Ameren, Ameren Services, AER, Genco, AERG, Marketing Company, and other non-state-regulated Ameren subsidiaries have the ability, subject to Ameren parent company authorization and applicable regulatory short-term borrowing authorizations, to access funding from the 2010 Credit Agreements and the commercial paper programs through a non-state-regulated subsidiary money pool agreement. All participants may borrow from or lend to the non-state-regulated money pool, except for Ameren Services, which may participate only as a borrower. The total amount available to the pool participants at any given time is reduced by the amount of borrowings made by participants, but is increased to the extent that the pool participants advance surplus funds to the non-state-regulated subsidiary money pool or remit funds from other external sources. The non-state-regulated subsidiary money pool was established to coordinate and to provide short-term cash and working capital for the participants. Participants receiving a loan under the non-state-regulated subsidiary money pool agreement must repay the principal amount of such loan, together with accrued interest. The rate of interest depends on the composition of internal and external funds in the non-state-regulated subsidiary money pool. The average interest rate for borrowing under the non-state-regulated subsidiary money pool for the year ended December 31, 2011, was 0.77% (2010 – 0.77%).

See Note 14 – Related Party Transactions for the amount of interest income and expense from the money pool arrangements recorded by the Ameren Companies for the years ended December 31, 2011, 2010, and 2009.

Unilateral Borrowing Agreement

In addition, a unilateral borrowing agreement exists among Ameren, Ameren Illinois, and Ameren Services, which enables Ameren Illinois to make short-term borrowings directly from Ameren. The aggregate amount of borrowings outstanding at any time by Ameren Illinois under the unilateral borrowing agreement and the utility money pool agreement, together with any outstanding Ameren Illinois external credit facility borrowings or commercial paper issuances, may not exceed $500 million, pursuant to authorization from the ICC. Ameren Illinois is not currently borrowing under the unilateral borrowing agreement. Ameren Services is responsible for operation and administration of the unilateral borrowing agreement.

 

Long-Term Debt And Equity Financings

NOTE 5 – LONG-TERM DEBT AND EQUITY FINANCINGS

The following table presents long-term debt outstanding for the Ameren Companies as of December 31, 2011, and 2010:

 

     2011      2010  

Ameren (Parent):

     

8.875% Senior unsecured notes due 2014

   $ 425       $ 425   

Less: Unamortized discount and premium

     (1      (2

Long-term debt, net

   $ 424       $ 423   

Ameren Missouri:

     

Senior secured notes:(a)

     

5.25% Senior secured notes due 2012

   $ 173       $ 173   

4.65% Senior secured notes due 2013

     200         200   

5.50% Senior secured notes due 2014

     104         104   

4.75% Senior secured notes due 2015

     114         114   

5.40% Senior secured notes due 2016

     260         260   

6.40% Senior secured notes due 2017

     425         425   

6.00% Senior secured notes due 2018(b)

     250         250   

5.10% Senior secured notes due 2018

     200         200   

6.70% Senior secured notes due 2019(b)

     450         450   

5.10% Senior secured notes due 2019

     300         300   

5.00% Senior secured notes due 2020

     85         85   

5.50% Senior secured notes due 2034

     184         184   

5.30% Senior secured notes due 2037

     300         300   

8.45% Senior secured notes due 2039(b)

     350         350   

Environmental improvement and pollution control revenue bonds:

     

1992 Series due 2022(c)(d)

     47         47   

1993 5.45% Series due 2028(e)

     44         44   

1998 Series A due 2033(c)(d)

     60         60   

1998 Series B due 2033(c)(d)

     50         50   

1998 Series C due 2033(c)(d)

     50         50   

Capital lease obligations:

     

City of Bowling Green capital lease (Peno Creek CT)

     69         74   

Audrain County capital lease (Audrain County CT)

     240         240   

Total long-term debt, gross

     3,955         3,960   

Less: Unamortized discount and premium

     (5      (6

Less: Maturities due within one year

     (178      (5

Long-term debt, net

   $     3,772       $     3,949   

Ameren Illinois:

     

Senior secured notes:

     

6.625% Senior secured notes due 2011

   $ -       $ 150   

8.875% Senior secured notes due 2013(f)(h)

     150         150   

6.20% Senior secured notes due 2016(f)

     54         54   

6.25% Senior secured notes due 2016(g)

     75         75   

6.125% Senior secured notes due 2017(g)(i)

     250         250   

6.25% Senior secured notes due 2018(g)(i)

     337         337   

9.75% Senior secured notes due 2018(g)(i)

     400         400   

6.125% Senior secured notes due 2028(g)

     60         60   

6.70% Senior secured notes due 2036(g)

     61         61   

6.70% Senior secured notes due 2036(f)

     42         42   

Environmental improvement and pollution control revenue bonds:

     

6.20% Series 1992B due 2012(j)

     1         1   

2000 Series A 5.50% due 2014

     51         51   

5.90% Series 1993 due 2023(j)

     32         32   

5.70% 1994A Series due 2024(k)

     36         36   

1993 Series C-1 5.95% due 2026

     35         35   

1993 Series C-2 5.70% due 2026

     8         8   

1993 Series B-1 due 2028(d)

     17         17   

5.40% 1998A Series due 2028(k)

     19         19   

5.40% 1998B Series due 2028(k)

     33         33   

Fair-market value adjustments

     5         5   

Total long-term debt, gross

     1,666         1,816   

Less: Unamortized discount and premium

     (8      (9

Less: Maturities due within one year

     (1      (150

Long-term debt, net

   $ 1,657       $ 1,657   

Genco:

     

Unsecured notes:

     

Senior notes Series F 7.95% due 2032

   $ 275       $ 275   

Senior notes Series H 7.00% due 2018

     300         300   

Senior notes Series I 6.30% due 2020

     250         250   

Total long-term debt, gross

     825         825   

Less: Unamortized discount and premium

     (1      (1

Less: Maturities due within one year

     -         -   

Long-term debt, net

   $ 824       $ 824   

Ameren consolidated long-term debt, net

   $     6,677       $     6,853   

 

 

(h) Ameren Illinois has agreed, during the life of these notes, not to optionally redeem, purchase or otherwise retire in full its CILCO first mortgage bonds.

The following table presents the aggregate maturities of long-term debt, including current maturities, for the Ameren Companies at December 31, 2011:

 

All of the Ameren Companies expect to fund maturities of long-term debt, short-term borrowings, credit facility borrowings, commercial paper and contractual obligations through a combination of cash flow from operations and external financing. See Note 4 – Short-Term Debt and Liquidity for a discussion of external financing availability.

All classes of Ameren Missouri's and Ameren Illinois' preferred stock are entitled to cumulative dividends and have voting rights. The following table presents the outstanding preferred stock of Ameren Missouri and Ameren Illinois that is not subject to mandatory redemption. The preferred stock is redeemable, at the option of the issuer, at the prices shown below as of December 31, 2011 and 2010:

 

Pursuant to the Ameren Illinois Merger: (i) every two shares of each series of IP preferred stock outstanding immediately prior to the Ameren Illinois Merger were automatically converted into one share of a newly created series of Ameren Illinois preferred stock having the same payment and redemption terms as the existing series of IP preferred stock, except to the extent that IP preferred stockholders exercised their dissenters' rights in accordance with Illinois law; and (ii) each outstanding share of CIPS common and preferred stock remained outstanding, except to the extent that CIPS preferred stockholders exercised their dissenters' rights in accordance with Illinois law. Stockholders holding 8,337 shares and 423 shares of CIPS and IP preferred stock, respectively, exercised their dissenter's rights.

In addition, Ameren has 100 million shares of $0.01 par value preferred stock authorized, with no shares outstanding. Ameren Missouri has 7.5 million shares of $1 par value preference stock authorized, with no such preference stock outstanding. Ameren Illinois has 2.6 million shares of no par value preferred stock authorized, with no shares outstanding.

Ameren

A Form S-3 registration statement was filed by Ameren with the SEC in June 2011, authorizing the offering of 6 million additional shares of its common stock under DRPlus. Shares of common stock sold under DRPlus are, at Ameren's option, newly issued shares, treasury shares, or shares purchased in the open market or in privately negotiated transactions. In 2012, Ameren plans for shares to be purchased in the open market for DRPlus and its 401(k) plan. Under DRPlus and its 401(k) plan, Ameren issued 2.2 million, 3.0 million, and 3.2 million shares of common stock in 2011, 2010, and 2009, respectively, which were valued at $65 million, $80 million, and $82 million for the respective years.

In February 2010, CILCORP completed a covenant defeasance of its remaining outstanding 9.375% senior bonds due 2029 by depositing $3 million in U.S. government obligations and cash with the indenture trustee. This deposit will be used solely to satisfy the principal and remaining interest obligations on these bonds. In connection with this covenant defeasance, the lien on the capital stock of CILCO securing these bonds was released.

Ameren Missouri

In August 2010, Ameren Missouri redeemed all $33 million of its $7.64 Series preferred stock at $100.85 per share, plus accrued and unpaid dividends.

In September 2010, Ameren Missouri redeemed all $66 million of its 7.69% Series A subordinated deferrable interest debentures at a redemption price of 102.692% of the principal amount plus accrued interest.

Ameren Illinois

In June 2011, Ameren Illinois' 6.625% $150 million senior secured notes matured and were repaid and retired using available cash on hand.

In August 2010, Ameren Illinois (formerly CILCO) redeemed all of the 111,264 outstanding shares of its 4.50% Series preferred stock at $110 per share and all of the 79,940 shares of its 4.64% Series preferred stock at $102 per share, plus, in each case, accrued and unpaid dividends. These preferred shares were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren Illinois (formerly CIPS) redeemed all $40 million of its 7.61% Series 1997-2 first mortgage bonds at a redemption price of 101.52% of the principal amount, plus accrued interest. These bonds were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren contributed to the capital of Ameren Illinois (formerly IP), without the payment of any consideration, all of the IP preferred stock owned by Ameren ($33 million). IP cancelled these preferred shares. This transaction was completed in connection with the Ameren Illinois Merger.

 

 

See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

Genco

In November 2010, Genco's $200 million 8.35% senior notes matured and were retired with available cash on hand.

 

Indenture Provisions and Other Covenants

Ameren Missouri's and Ameren Illinois' indentures and articles of incorporation include covenants and provisions related to issuances of first mortgage bonds and preferred stock. Ameren Missouri and Ameren Illinois are required to meet certain ratios to issue additional first mortgage bonds and preferred stock. However, a failure to achieve these ratios would not result in a default under these covenants and provisions but would restrict the companies' ability to issue bonds or preferred stock. The following table summarizes the required and actual interest coverage ratios for interest charges and dividend coverage ratios and bonds and preferred stock issuable as of December 31, 2011, at an assumed interest rate of 6% and dividend rate of 7%.

 

      Required Interest
Coverage Ratio(a)
   Actual Interest
Coverage Ratio
     Bonds Issuable(b)     Required Dividend
Coverage Ratio(c)
   Actual Dividend
Coverage Ratio
     Preferred Stock
Issuable
 

Ameren Missouri

             ³ 2.0      3.2       $     1,971      ³ 2.5      84.9       $ 1,610   

Ameren Illinois

              ³ 2.0      7.2         3,335 (d)    ³ 1.5      3.1         203   

 

(a) Coverage required on the annual interest charges on first mortgage bonds outstanding and to be issued. Coverage is not required in certain cases when additional first mortgage bonds are issued on the basis of retired bonds.
(b) Amount of bonds issuable based either on required coverage ratios or unfunded property additions, whichever is more restrictive. The amounts shown also include bonds issuable based on retired bond capacity of $89 million and $765 million at Ameren Missouri and Ameren Illinois, respectively.
(c) Coverage required on the annual dividend on preferred stock outstanding and to be issued, as required in the respective company's articles of incorporation.
(d) Amount of bonds issuable by Ameren Illinois based on unfunded property additions and retired bonds solely under the former IP mortgage indenture.

Ameren's indenture does not require Ameren to comply with any quantitative financial covenants. The indenture does, however, include certain cross-default provisions. Specifically, either (1) the failure by Ameren to pay when due and upon expiration of any applicable grace period any portion of any Ameren indebtedness in excess of $25 million or (2) the acceleration upon default of the maturity of any Ameren indebtedness in excess of $25 million under any indebtedness agreement, including the 2010 Credit Agreements, constitutes a default under the indenture, unless such past due or accelerated debt is discharged or the acceleration is rescinded or annulled within a specified period.

Ameren Missouri, Ameren Illinois, Genco and certain other nonregistrant Ameren subsidiaries are subject to Section 305(a) of the Federal Power Act, which makes it unlawful for any officer or director of a public utility, as defined in the Federal Power Act, to participate in the making or paying of any dividend from any funds "properly included in capital account." The meaning of this limitation has never been clarified under the Federal Power Act or FERC regulations. However, FERC has consistently interpreted the provision to allow dividends to be paid as long as (1) the source of the dividends is clearly disclosed, (2) the dividends are not excessive, and (3) there is no self-dealing on the part of corporate officials. At a minimum, Ameren believes that dividends can be paid by its subsidiaries that are public utilities from net income and retained earnings. In addition, under Illinois law, Ameren Illinois may not pay any dividend on their respective stock, unless, among other things, their respective earnings and earned surplus are sufficient to declare and pay a dividend after provision is made for reasonable and proper reserves, or unless Ameren Illinois has specific authorization from the ICC.

Ameren Illinois' articles of incorporation require its dividend payments on common stock to be based on ratios of common stock to total capitalization and other provisions related to certain operating expenses and accumulations of earned surplus. Ameren Illinois committed to FERC to maintain a minimum 30% ratio of common stock equity to total capitalization after the Ameren Illinois Merger and AERG distribution. As of December 31, 2011, Ameren Illinois' ratio of common stock equity to total capitalization was 58%.

Genco's indenture includes provisions that require Genco to maintain certain interest coverage and debt-to-capital ratios in order for Genco to pay dividends, to make principal or interest payments on subordinated borrowings, to make loans to or investments in affiliates, or to incur additional external, third-party indebtedness. The following table summarizes these ratios for the 12 months ended and as of December 31, 2011:

 

    

Required

Interest
Coverage
Ratio

 

Actual

Interest
Coverage
Ratio

    

Required

Debt-to-
Capital
Ratio

 

Actual

Debt-to-
Capital
Ratio

 

Genco

  ³ 1.75(a)/2.50(b)     4.3       £ 60% (b)     43

 

(a)

A minimum interest coverage ratio of 1.75 is required for Genco to make certain restricted payments, as defined, including specified dividend payments and, principal and interest payments on subordinated borrowings. As of the date of the restricted payment, the minimum ratio must have been achieved for the most recently ended four fiscal quarters and projected by management to be achieved for each of the subsequent four six-month periods. Investments in the non-state-regulated subsidiary money pool and repayments of non-state-regulated subsidiary money pool borrowings are not subject to this incurrence test.

(b) A minimum interest coverage ratio of 2.50 for the most recently ended four fiscal quarters and a debt-to-capital ratio of no greater than 60% are required for Genco to incur additional indebtedness, as defined, other than permitted indebtedness, as defined, for borrowed money. The ratios must be computed on a pro forma basis considering the additional indebtedness to be incurred and the related interest expense. Non-state-regulated subsidiary money pool borrowings are defined as permitted indebtedness and are not subject to these incurrence tests. Credit facility borrowings, including borrowings under the 2010 Genco Credit Agreement, and other borrowings from third-party, external sources are included in the definition of indebtedness and are subject to these incurrence tests.

 

Genco's debt incurrence-related ratio restrictions under its indenture may be disregarded if both Moody's and S&P reaffirm the ratings of Genco in place at the time of the debt incurrence after considering the additional indebtedness.

In order for the Ameren Companies to issue securities in the future, they will have to comply with all applicable requirements in effect at the time of any such issuances.

Off-Balance-Sheet Arrangements

At December 31, 2011, none of the Ameren Companies had any off-balance-sheet financing arrangements, other than operating leases entered into in the ordinary course of business. None of the Ameren Companies expect to engage in any significant off-balance-sheet financing arrangements in the near future.

NOTE 5 – LONG-TERM DEBT AND EQUITY FINANCINGS

The following table presents long-term debt outstanding for the Ameren Companies as of December 31, 2011, and 2010:

 

      2011      2010  

Ameren (Parent):

     

8.875% Senior unsecured notes due 2014

   $ 425       $ 425   

Less: Unamortized discount and premium

     (1      (2

Long-term debt, net

   $ 424       $ 423   

Ameren Missouri:

     

Senior secured notes:(a)

     

5.25% Senior secured notes due 2012

   $ 173       $ 173   

4.65% Senior secured notes due 2013

     200         200   

5.50% Senior secured notes due 2014

     104         104   

4.75% Senior secured notes due 2015

     114         114   

5.40% Senior secured notes due 2016

     260         260   

6.40% Senior secured notes due 2017

     425         425   

6.00% Senior secured notes due 2018(b)

     250         250   

5.10% Senior secured notes due 2018

     200         200   

6.70% Senior secured notes due 2019(b)

     450         450   

5.10% Senior secured notes due 2019

     300         300   

5.00% Senior secured notes due 2020

     85         85   

5.50% Senior secured notes due 2034

     184         184   

5.30% Senior secured notes due 2037

     300         300   

8.45% Senior secured notes due 2039(b)

     350         350   

Environmental improvement and pollution control revenue bonds:

     

1992 Series due 2022(c)(d)

     47         47   

1993 5.45% Series due 2028(e)

     44         44   

1998 Series A due 2033(c)(d)

     60         60   

1998 Series B due 2033(c)(d)

     50         50   

1998 Series C due 2033(c)(d)

     50         50   

Capital lease obligations:

     

City of Bowling Green capital lease (Peno Creek CT)

     69         74   

Audrain County capital lease (Audrain County CT)

     240         240   

Total long-term debt, gross

     3,955         3,960   

Less: Unamortized discount and premium

     (5      (6

Less: Maturities due within one year

     (178      (5

Long-term debt, net

   $     3,772       $     3,949   

Ameren Illinois:

     

Senior secured notes:

     

6.625% Senior secured notes due 2011

   $ -       $ 150   

8.875% Senior secured notes due 2013(f)(h)

     150         150   

6.20% Senior secured notes due 2016(f)

     54         54   

6.25% Senior secured notes due 2016(g)

     75         75   

6.125% Senior secured notes due 2017(g)(i)

     250         250   

6.25% Senior secured notes due 2018(g)(i)

     337         337   

9.75% Senior secured notes due 2018(g)(i)

     400         400   

6.125% Senior secured notes due 2028(g)

     60         60   

6.70% Senior secured notes due 2036(g)

     61         61   

6.70% Senior secured notes due 2036(f)

     42         42   

Environmental improvement and pollution control revenue bonds:

     

6.20% Series 1992B due 2012(j)

     1         1   

2000 Series A 5.50% due 2014

     51         51   

5.90% Series 1993 due 2023(j)

     32         32   

5.70% 1994A Series due 2024(k)

     36         36   

1993 Series C-1 5.95% due 2026

     35         35   

1993 Series C-2 5.70% due 2026

     8         8   

1993 Series B-1 due 2028(d)

     17         17   

5.40% 1998A Series due 2028(k)

     19         19   

5.40% 1998B Series due 2028(k)

     33         33   

Fair-market value adjustments

     5         5   

Total long-term debt, gross

     1,666         1,816   

Less: Unamortized discount and premium

     (8      (9

Less: Maturities due within one year

     (1      (150

Long-term debt, net

   $ 1,657       $ 1,657   

Genco:

     

Unsecured notes:

     

Senior notes Series F 7.95% due 2032

   $ 275       $ 275   

Senior notes Series H 7.00% due 2018

     300         300   

Senior notes Series I 6.30% due 2020

     250         250   

Total long-term debt, gross

     825         825   

Less: Unamortized discount and premium

     (1      (1

Less: Maturities due within one year

     -         -   

Long-term debt, net

   $ 824       $ 824   

Ameren consolidated long-term debt, net

   $     6,677       $     6,853   

 

(a) These notes are collaterally secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any first mortgage bonds issued under the UE mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2039.
(b) Ameren Missouri has agreed not to affect the release of first mortgage bonds securing these notes at any time during the life of these notes.
(c) These notes are secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture and have a fall-away lien provision similar to that of the company's senior secured notes. The notes are also backed by an insurance guarantee policy.
(d) Interest rates, and periods during which such rates apply, vary depending on our selection of defined rate modes. Maximum interest rates could range up to 18% depending on the series of bonds. The average interest rates for 2011 and 2010 were as follows:

 

    2011   2010

Ameren Missouri 1992 Series

  0.34%   0.47%

Ameren Missouri 1998 Series A

  0.69%   0.71%

Ameren Missouri 1998 Series B

  0.68%   0.73%

Ameren Missouri 1998 Series C

  0.69%   0.74%

Ameren Illinois 1993 Series B-1

  0.28%   0.59%

 

(e) These notes are first mortgage bonds issued by Ameren Missouri under the UE mortgage bond indenture and are secured by substantially all Ameren Missouri property and franchises. The notes are callable at 100% of par value.
(f)

These notes are collaterally secured by first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the CILCO mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2023.

(g) These notes are collaterally secured by mortgage bonds issued by Ameren Illinois under the IP mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the IP mortgage indenture remain outstanding. Redemption, purchase, or maturity of all mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the mortgage bond lien protection associated with these notes to fall away until 2028.
(h) Ameren Illinois has agreed not to affect a release of CILCO first mortgage bonds securing these notes at any time during the life of these notes.
(i) Ameren Illinois has agreed not to affect a release of IP mortgage bonds securing these notes at any time during the life of these notes.
(j) These notes are first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture and are secured by substantially all property of the former CILCO. The notes are callable at 100% of par value.
(k) These notes are mortgage bonds issued by Ameren Illinois under the IP mortgage indenture and are secured by substantially all property of the former IP and CIPS. The notes are callable at 100% of par value. The notes are also backed by an insurance guarantee policy.

The following table presents the aggregate maturities of long-term debt, including current maturities, for the Ameren Companies at December 31, 2011:

 

       

Ameren  

(Parent)(a)

       Ameren
Missouri(a)
       Ameren
Illinois(a)(b)
       Genco(a)       

Ameren

Consolidated

 

2012

     $ -         $ 178         $ 1         $ -         $ 179   

2013

       -           205           150           -           355   

2014

       425           109           51           -           585   

2015

       -           120           -           -           120   

2016

       -           266           129           -           395   

Thereafter

       -           3,077           1,330           825           5,232   

Total

     $     425         $     3,955         $     1,661         $     825         $     6,866   

 

(a) Excludes unamortized discount and premium of $1 million, $5 million, $8 million and $1 million at Ameren (Parent), Ameren Missouri, Ameren Illinois and Genco, respectively.
(b) Excludes $5 million related to Ameren Illinois' long-term debt fair-market value adjustments, which are being amortized to interest expense over the remaining life of the debt.

All of the Ameren Companies expect to fund maturities of long-term debt, short-term borrowings, credit facility borrowings, commercial paper and contractual obligations through a combination of cash flow from operations and external financing. See Note 4 – Short-Term Debt and Liquidity for a discussion of external financing availability.

All classes of Ameren Missouri's and Ameren Illinois' preferred stock are entitled to cumulative dividends and have voting rights. The following table presents the outstanding preferred stock of Ameren Missouri and Ameren Illinois that is not subject to mandatory redemption. The preferred stock is redeemable, at the option of the issuer, at the prices shown below as of December 31, 2011 and 2010:

 

                Redemption Price (per share)        2011        2010  

Ameren Missouri:

                

Without par value and stated value of $100 per share, 25 million shares authorized

            

$3.50 Series

 

130,000 shares

     $     110.00         $ 13         $ 13   

$3.70 Series

 

40,000 shares

       104.75           4           4   

$4.00 Series

 

150,000 shares

       105.625           15           15   

$4.30 Series

 

40,000 shares

       105.00           4           4   

$4.50 Series

 

213,595 shares

       110.00(a)           21           21   

$4.56 Series

 

200,000 shares

       102.47           20           20   

$4.75 Series

 

20,000 shares

       102.176           2           2   

$5.50 Series A

 

14,000 shares

         110.00              1           1   

Total

              $     80         $     80   

Ameren Illinois:

                

With par value of $100 per share, 2 million shares authorized

            

4.00% Series

 

144,275 shares

     $ 101.00         $ 14         $ 14   

4.08% Series

 

45,224 shares

       103.00           5           5   

4.20% Series

 

23,655 shares

       104.00           2           2   

4.25% Series

 

50,000 shares

       102.00           5           5   

4.26% Series

 

16,621 shares

       103.00           2           2   

4.42% Series

 

16,190 shares

       103.00           2           2   

4.70% Series

 

18,429 shares

       103.00           2           2   

4.90% Series

 

73,825 shares

       102.00           7           7   

4.92% Series

 

49,289 shares

       103.50           5           5   

5.16% Series

 

50,000 shares

       102.00           5           5   

6.625% Series

 

124,273.75 shares

       100.00           12           12   

7.75% Series

 

4,542 shares

         100.00           1           1   

Total

              $ 62         $ 62   

Total Ameren

              $     142         $     142   

 

(a) In the event of voluntary liquidation, $105.50.

Pursuant to the Ameren Illinois Merger: (i) every two shares of each series of IP preferred stock outstanding immediately prior to the Ameren Illinois Merger were automatically converted into one share of a newly created series of Ameren Illinois preferred stock having the same payment and redemption terms as the existing series of IP preferred stock, except to the extent that IP preferred stockholders exercised their dissenters' rights in accordance with Illinois law; and (ii) each outstanding share of CIPS common and preferred stock remained outstanding, except to the extent that CIPS preferred stockholders exercised their dissenters' rights in accordance with Illinois law. Stockholders holding 8,337 shares and 423 shares of CIPS and IP preferred stock, respectively, exercised their dissenter's rights.

In addition, Ameren has 100 million shares of $0.01 par value preferred stock authorized, with no shares outstanding. Ameren Missouri has 7.5 million shares of $1 par value preference stock authorized, with no such preference stock outstanding. Ameren Illinois has 2.6 million shares of no par value preferred stock authorized, with no shares outstanding.

Ameren

A Form S-3 registration statement was filed by Ameren with the SEC in June 2011, authorizing the offering of 6 million additional shares of its common stock under DRPlus. Shares of common stock sold under DRPlus are, at Ameren's option, newly issued shares, treasury shares, or shares purchased in the open market or in privately negotiated transactions. In 2012, Ameren plans for shares to be purchased in the open market for DRPlus and its 401(k) plan. Under DRPlus and its 401(k) plan, Ameren issued 2.2 million, 3.0 million, and 3.2 million shares of common stock in 2011, 2010, and 2009, respectively, which were valued at $65 million, $80 million, and $82 million for the respective years.

In February 2010, CILCORP completed a covenant defeasance of its remaining outstanding 9.375% senior bonds due 2029 by depositing $3 million in U.S. government obligations and cash with the indenture trustee. This deposit will be used solely to satisfy the principal and remaining interest obligations on these bonds. In connection with this covenant defeasance, the lien on the capital stock of CILCO securing these bonds was released.

Ameren Missouri

In August 2010, Ameren Missouri redeemed all $33 million of its $7.64 Series preferred stock at $100.85 per share, plus accrued and unpaid dividends.

In September 2010, Ameren Missouri redeemed all $66 million of its 7.69% Series A subordinated deferrable interest debentures at a redemption price of 102.692% of the principal amount plus accrued interest.

Ameren Illinois

In June 2011, Ameren Illinois' 6.625% $150 million senior secured notes matured and were repaid and retired using available cash on hand.

In August 2010, Ameren Illinois (formerly CILCO) redeemed all of the 111,264 outstanding shares of its 4.50% Series preferred stock at $110 per share and all of the 79,940 shares of its 4.64% Series preferred stock at $102 per share, plus, in each case, accrued and unpaid dividends. These preferred shares were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren Illinois (formerly CIPS) redeemed all $40 million of its 7.61% Series 1997-2 first mortgage bonds at a redemption price of 101.52% of the principal amount, plus accrued interest. These bonds were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren contributed to the capital of Ameren Illinois (formerly IP), without the payment of any consideration, all of the IP preferred stock owned by Ameren ($33 million). IP cancelled these preferred shares. This transaction was completed in connection with the Ameren Illinois Merger.

 

 

See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

Genco

In November 2010, Genco's $200 million 8.35% senior notes matured and were retired with available cash on hand.

 

Indenture Provisions and Other Covenants

Ameren Missouri's and Ameren Illinois' indentures and articles of incorporation include covenants and provisions related to issuances of first mortgage bonds and preferred stock. Ameren Missouri and Ameren Illinois are required to meet certain ratios to issue additional first mortgage bonds and preferred stock. However, a failure to achieve these ratios would not result in a default under these covenants and provisions but would restrict the companies' ability to issue bonds or preferred stock. The following table summarizes the required and actual interest coverage ratios for interest charges and dividend coverage ratios and bonds and preferred stock issuable as of December 31, 2011, at an assumed interest rate of 6% and dividend rate of 7%.

 

      Required Interest
Coverage Ratio(a)
   Actual Interest
Coverage Ratio
     Bonds Issuable(b)     Required Dividend
Coverage Ratio(c)
   Actual Dividend
Coverage Ratio
     Preferred Stock
Issuable
 

Ameren Missouri

             ³ 2.0      3.2       $     1,971      ³ 2.5      84.9       $ 1,610   

Ameren Illinois

              ³ 2.0      7.2         3,335 (d)    ³ 1.5      3.1         203   

 

(a) Coverage required on the annual interest charges on first mortgage bonds outstanding and to be issued. Coverage is not required in certain cases when additional first mortgage bonds are issued on the basis of retired bonds.
(b) Amount of bonds issuable based either on required coverage ratios or unfunded property additions, whichever is more restrictive. The amounts shown also include bonds issuable based on retired bond capacity of $89 million and $765 million at Ameren Missouri and Ameren Illinois, respectively.
(c) Coverage required on the annual dividend on preferred stock outstanding and to be issued, as required in the respective company's articles of incorporation.
(d) Amount of bonds issuable by Ameren Illinois based on unfunded property additions and retired bonds solely under the former IP mortgage indenture.

Ameren's indenture does not require Ameren to comply with any quantitative financial covenants. The indenture does, however, include certain cross-default provisions. Specifically, either (1) the failure by Ameren to pay when due and upon expiration of any applicable grace period any portion of any Ameren indebtedness in excess of $25 million or (2) the acceleration upon default of the maturity of any Ameren indebtedness in excess of $25 million under any indebtedness agreement, including the 2010 Credit Agreements, constitutes a default under the indenture, unless such past due or accelerated debt is discharged or the acceleration is rescinded or annulled within a specified period.

Ameren Missouri, Ameren Illinois, Genco and certain other nonregistrant Ameren subsidiaries are subject to Section 305(a) of the Federal Power Act, which makes it unlawful for any officer or director of a public utility, as defined in the Federal Power Act, to participate in the making or paying of any dividend from any funds "properly included in capital account." The meaning of this limitation has never been clarified under the Federal Power Act or FERC regulations. However, FERC has consistently interpreted the provision to allow dividends to be paid as long as (1) the source of the dividends is clearly disclosed, (2) the dividends are not excessive, and (3) there is no self-dealing on the part of corporate officials. At a minimum, Ameren believes that dividends can be paid by its subsidiaries that are public utilities from net income and retained earnings. In addition, under Illinois law, Ameren Illinois may not pay any dividend on their respective stock, unless, among other things, their respective earnings and earned surplus are sufficient to declare and pay a dividend after provision is made for reasonable and proper reserves, or unless Ameren Illinois has specific authorization from the ICC.

Ameren Illinois' articles of incorporation require its dividend payments on common stock to be based on ratios of common stock to total capitalization and other provisions related to certain operating expenses and accumulations of earned surplus. Ameren Illinois committed to FERC to maintain a minimum 30% ratio of common stock equity to total capitalization after the Ameren Illinois Merger and AERG distribution. As of December 31, 2011, Ameren Illinois' ratio of common stock equity to total capitalization was 58%.

Genco's indenture includes provisions that require Genco to maintain certain interest coverage and debt-to-capital ratios in order for Genco to pay dividends, to make principal or interest payments on subordinated borrowings, to make loans to or investments in affiliates, or to incur additional external, third-party indebtedness. The following table summarizes these ratios for the 12 months ended and as of December 31, 2011:

 

    

Required

Interest
Coverage
Ratio

 

Actual

Interest
Coverage
Ratio

    

Required

Debt-to-
Capital
Ratio

 

Actual

Debt-to-
Capital
Ratio

 

Genco

  ³ 1.75(a)/2.50(b)     4.3       £ 60% (b)     43

 

(a)

A minimum interest coverage ratio of 1.75 is required for Genco to make certain restricted payments, as defined, including specified dividend payments and, principal and interest payments on subordinated borrowings. As of the date of the restricted payment, the minimum ratio must have been achieved for the most recently ended four fiscal quarters and projected by management to be achieved for each of the subsequent four six-month periods. Investments in the non-state-regulated subsidiary money pool and repayments of non-state-regulated subsidiary money pool borrowings are not subject to this incurrence test.

(b) A minimum interest coverage ratio of 2.50 for the most recently ended four fiscal quarters and a debt-to-capital ratio of no greater than 60% are required for Genco to incur additional indebtedness, as defined, other than permitted indebtedness, as defined, for borrowed money. The ratios must be computed on a pro forma basis considering the additional indebtedness to be incurred and the related interest expense. Non-state-regulated subsidiary money pool borrowings are defined as permitted indebtedness and are not subject to these incurrence tests. Credit facility borrowings, including borrowings under the 2010 Genco Credit Agreement, and other borrowings from third-party, external sources are included in the definition of indebtedness and are subject to these incurrence tests.

 

Genco's debt incurrence-related ratio restrictions under its indenture may be disregarded if both Moody's and S&P reaffirm the ratings of Genco in place at the time of the debt incurrence after considering the additional indebtedness.

In order for the Ameren Companies to issue securities in the future, they will have to comply with all applicable requirements in effect at the time of any such issuances.

Off-Balance-Sheet Arrangements

At December 31, 2011, none of the Ameren Companies had any off-balance-sheet financing arrangements, other than operating leases entered into in the ordinary course of business. None of the Ameren Companies expect to engage in any significant off-balance-sheet financing arrangements in the near future.

NOTE 5 – LONG-TERM DEBT AND EQUITY FINANCINGS

The following table presents long-term debt outstanding for the Ameren Companies as of December 31, 2011, and 2010:

 

      2011      2010  

Ameren (Parent):

     

8.875% Senior unsecured notes due 2014

   $ 425       $ 425   

Less: Unamortized discount and premium

     (1      (2

Long-term debt, net

   $ 424       $ 423   

Ameren Missouri:

     

Senior secured notes:(a)

     

5.25% Senior secured notes due 2012

   $ 173       $ 173   

4.65% Senior secured notes due 2013

     200         200   

5.50% Senior secured notes due 2014

     104         104   

4.75% Senior secured notes due 2015

     114         114   

5.40% Senior secured notes due 2016

     260         260   

6.40% Senior secured notes due 2017

     425         425   

6.00% Senior secured notes due 2018(b)

     250         250   

5.10% Senior secured notes due 2018

     200         200   

6.70% Senior secured notes due 2019(b)

     450         450   

5.10% Senior secured notes due 2019

     300         300   

5.00% Senior secured notes due 2020

     85         85   

5.50% Senior secured notes due 2034

     184         184   

5.30% Senior secured notes due 2037

     300         300   

8.45% Senior secured notes due 2039(b)

     350         350   

Environmental improvement and pollution control revenue bonds:

     

1992 Series due 2022(c)(d)

     47         47   

1993 5.45% Series due 2028(e)

     44         44   

1998 Series A due 2033(c)(d)

     60         60   

1998 Series B due 2033(c)(d)

     50         50   

1998 Series C due 2033(c)(d)

     50         50   

Capital lease obligations:

     

City of Bowling Green capital lease (Peno Creek CT)

     69         74   

Audrain County capital lease (Audrain County CT)

     240         240   

Total long-term debt, gross

     3,955         3,960   

Less: Unamortized discount and premium

     (5      (6

Less: Maturities due within one year

     (178      (5

Long-term debt, net

   $     3,772       $     3,949   

Ameren Illinois:

     

Senior secured notes:

     

6.625% Senior secured notes due 2011

   $ -       $ 150   

8.875% Senior secured notes due 2013(f)(h)

     150         150   

6.20% Senior secured notes due 2016(f)

     54         54   

6.25% Senior secured notes due 2016(g)

     75         75   

6.125% Senior secured notes due 2017(g)(i)

     250         250   

6.25% Senior secured notes due 2018(g)(i)

     337         337   

9.75% Senior secured notes due 2018(g)(i)

     400         400   

6.125% Senior secured notes due 2028(g)

     60         60   

6.70% Senior secured notes due 2036(g)

     61         61   

6.70% Senior secured notes due 2036(f)

     42         42   

Environmental improvement and pollution control revenue bonds:

     

6.20% Series 1992B due 2012(j)

     1         1   

2000 Series A 5.50% due 2014

     51         51   

5.90% Series 1993 due 2023(j)

     32         32   

5.70% 1994A Series due 2024(k)

     36         36   

1993 Series C-1 5.95% due 2026

     35         35   

1993 Series C-2 5.70% due 2026

     8         8   

1993 Series B-1 due 2028(d)

     17         17   

5.40% 1998A Series due 2028(k)

     19         19   

5.40% 1998B Series due 2028(k)

     33         33   

Fair-market value adjustments

     5         5   

Total long-term debt, gross

     1,666         1,816   

Less: Unamortized discount and premium

     (8      (9

Less: Maturities due within one year

     (1      (150

Long-term debt, net

   $ 1,657       $ 1,657   

Genco:

     

Unsecured notes:

     

Senior notes Series F 7.95% due 2032

   $ 275       $ 275   

Senior notes Series H 7.00% due 2018

     300         300   

Senior notes Series I 6.30% due 2020

     250         250   

Total long-term debt, gross

     825         825   

Less: Unamortized discount and premium

     (1      (1

Less: Maturities due within one year

     -         -   

Long-term debt, net

   $ 824       $ 824   

Ameren consolidated long-term debt, net

   $     6,677       $     6,853   

 

(a) These notes are collaterally secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any first mortgage bonds issued under the UE mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2039.
(b) Ameren Missouri has agreed not to affect the release of first mortgage bonds securing these notes at any time during the life of these notes.
(c) These notes are secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture and have a fall-away lien provision similar to that of the company's senior secured notes. The notes are also backed by an insurance guarantee policy.
(d) Interest rates, and periods during which such rates apply, vary depending on our selection of defined rate modes. Maximum interest rates could range up to 18% depending on the series of bonds. The average interest rates for 2011 and 2010 were as follows:

 

    2011   2010

Ameren Missouri 1992 Series

  0.34%   0.47%

Ameren Missouri 1998 Series A

  0.69%   0.71%

Ameren Missouri 1998 Series B

  0.68%   0.73%

Ameren Missouri 1998 Series C

  0.69%   0.74%

Ameren Illinois 1993 Series B-1

  0.28%   0.59%

 

(e) These notes are first mortgage bonds issued by Ameren Missouri under the UE mortgage bond indenture and are secured by substantially all Ameren Missouri property and franchises. The notes are callable at 100% of par value.
(f)

These notes are collaterally secured by first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the CILCO mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2023.

(g) These notes are collaterally secured by mortgage bonds issued by Ameren Illinois under the IP mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the IP mortgage indenture remain outstanding. Redemption, purchase, or maturity of all mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the mortgage bond lien protection associated with these notes to fall away until 2028.
(h) Ameren Illinois has agreed not to affect a release of CILCO first mortgage bonds securing these notes at any time during the life of these notes.
(i) Ameren Illinois has agreed not to affect a release of IP mortgage bonds securing these notes at any time during the life of these notes.
(j) These notes are first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture and are secured by substantially all property of the former CILCO. The notes are callable at 100% of par value.
(k) These notes are mortgage bonds issued by Ameren Illinois under the IP mortgage indenture and are secured by substantially all property of the former IP and CIPS. The notes are callable at 100% of par value. The notes are also backed by an insurance guarantee policy.

The following table presents the aggregate maturities of long-term debt, including current maturities, for the Ameren Companies at December 31, 2011:

 

       

Ameren  

(Parent)(a)

       Ameren
Missouri(a)
       Ameren
Illinois(a)(b)
       Genco(a)       

Ameren

Consolidated

 

2012

     $ -         $ 178         $ 1         $ -         $ 179   

2013

       -           205           150           -           355   

2014

       425           109           51           -           585   

2015

       -           120           -           -           120   

2016

       -           266           129           -           395   

Thereafter

       -           3,077           1,330           825           5,232   

Total

     $     425         $     3,955         $     1,661         $     825         $     6,866   

 

(a) Excludes unamortized discount and premium of $1 million, $5 million, $8 million and $1 million at Ameren (Parent), Ameren Missouri, Ameren Illinois and Genco, respectively.
(b) Excludes $5 million related to Ameren Illinois' long-term debt fair-market value adjustments, which are being amortized to interest expense over the remaining life of the debt.

All of the Ameren Companies expect to fund maturities of long-term debt, short-term borrowings, credit facility borrowings, commercial paper and contractual obligations through a combination of cash flow from operations and external financing. See Note 4 – Short-Term Debt and Liquidity for a discussion of external financing availability.

All classes of Ameren Missouri's and Ameren Illinois' preferred stock are entitled to cumulative dividends and have voting rights. The following table presents the outstanding preferred stock of Ameren Missouri and Ameren Illinois that is not subject to mandatory redemption. The preferred stock is redeemable, at the option of the issuer, at the prices shown below as of December 31, 2011 and 2010:

 

                Redemption Price (per share)        2011        2010  

Ameren Missouri:

                

Without par value and stated value of $100 per share, 25 million shares authorized

            

$3.50 Series

 

130,000 shares

     $     110.00         $ 13         $ 13   

$3.70 Series

 

40,000 shares

       104.75           4           4   

$4.00 Series

 

150,000 shares

       105.625           15           15   

$4.30 Series

 

40,000 shares

       105.00           4           4   

$4.50 Series

 

213,595 shares

       110.00(a)           21           21   

$4.56 Series

 

200,000 shares

       102.47           20           20   

$4.75 Series

 

20,000 shares

       102.176           2           2   

$5.50 Series A

 

14,000 shares

         110.00              1           1   

Total

              $     80         $     80   

Ameren Illinois:

                

With par value of $100 per share, 2 million shares authorized

            

4.00% Series

 

144,275 shares

     $ 101.00         $ 14         $ 14   

4.08% Series

 

45,224 shares

       103.00           5           5   

4.20% Series

 

23,655 shares

       104.00           2           2   

4.25% Series

 

50,000 shares

       102.00           5           5   

4.26% Series

 

16,621 shares

       103.00           2           2   

4.42% Series

 

16,190 shares

       103.00           2           2   

4.70% Series

 

18,429 shares

       103.00           2           2   

4.90% Series

 

73,825 shares

       102.00           7           7   

4.92% Series

 

49,289 shares

       103.50           5           5   

5.16% Series

 

50,000 shares

       102.00           5           5   

6.625% Series

 

124,273.75 shares

       100.00           12           12   

7.75% Series

 

4,542 shares

         100.00           1           1   

Total

              $ 62         $ 62   

Total Ameren

              $     142         $     142   

 

(a) In the event of voluntary liquidation, $105.50.

Pursuant to the Ameren Illinois Merger: (i) every two shares of each series of IP preferred stock outstanding immediately prior to the Ameren Illinois Merger were automatically converted into one share of a newly created series of Ameren Illinois preferred stock having the same payment and redemption terms as the existing series of IP preferred stock, except to the extent that IP preferred stockholders exercised their dissenters' rights in accordance with Illinois law; and (ii) each outstanding share of CIPS common and preferred stock remained outstanding, except to the extent that CIPS preferred stockholders exercised their dissenters' rights in accordance with Illinois law. Stockholders holding 8,337 shares and 423 shares of CIPS and IP preferred stock, respectively, exercised their dissenter's rights.

In addition, Ameren has 100 million shares of $0.01 par value preferred stock authorized, with no shares outstanding. Ameren Missouri has 7.5 million shares of $1 par value preference stock authorized, with no such preference stock outstanding. Ameren Illinois has 2.6 million shares of no par value preferred stock authorized, with no shares outstanding.

Ameren

A Form S-3 registration statement was filed by Ameren with the SEC in June 2011, authorizing the offering of 6 million additional shares of its common stock under DRPlus. Shares of common stock sold under DRPlus are, at Ameren's option, newly issued shares, treasury shares, or shares purchased in the open market or in privately negotiated transactions. In 2012, Ameren plans for shares to be purchased in the open market for DRPlus and its 401(k) plan. Under DRPlus and its 401(k) plan, Ameren issued 2.2 million, 3.0 million, and 3.2 million shares of common stock in 2011, 2010, and 2009, respectively, which were valued at $65 million, $80 million, and $82 million for the respective years.

In February 2010, CILCORP completed a covenant defeasance of its remaining outstanding 9.375% senior bonds due 2029 by depositing $3 million in U.S. government obligations and cash with the indenture trustee. This deposit will be used solely to satisfy the principal and remaining interest obligations on these bonds. In connection with this covenant defeasance, the lien on the capital stock of CILCO securing these bonds was released.

Ameren Missouri

In August 2010, Ameren Missouri redeemed all $33 million of its $7.64 Series preferred stock at $100.85 per share, plus accrued and unpaid dividends.

In September 2010, Ameren Missouri redeemed all $66 million of its 7.69% Series A subordinated deferrable interest debentures at a redemption price of 102.692% of the principal amount plus accrued interest.

Ameren Illinois

In June 2011, Ameren Illinois' 6.625% $150 million senior secured notes matured and were repaid and retired using available cash on hand.

In August 2010, Ameren Illinois (formerly CILCO) redeemed all of the 111,264 outstanding shares of its 4.50% Series preferred stock at $110 per share and all of the 79,940 shares of its 4.64% Series preferred stock at $102 per share, plus, in each case, accrued and unpaid dividends. These preferred shares were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren Illinois (formerly CIPS) redeemed all $40 million of its 7.61% Series 1997-2 first mortgage bonds at a redemption price of 101.52% of the principal amount, plus accrued interest. These bonds were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren contributed to the capital of Ameren Illinois (formerly IP), without the payment of any consideration, all of the IP preferred stock owned by Ameren ($33 million). IP cancelled these preferred shares. This transaction was completed in connection with the Ameren Illinois Merger.

 

 

See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

Genco

In November 2010, Genco's $200 million 8.35% senior notes matured and were retired with available cash on hand.

 

Indenture Provisions and Other Covenants

Ameren Missouri's and Ameren Illinois' indentures and articles of incorporation include covenants and provisions related to issuances of first mortgage bonds and preferred stock. Ameren Missouri and Ameren Illinois are required to meet certain ratios to issue additional first mortgage bonds and preferred stock. However, a failure to achieve these ratios would not result in a default under these covenants and provisions but would restrict the companies' ability to issue bonds or preferred stock. The following table summarizes the required and actual interest coverage ratios for interest charges and dividend coverage ratios and bonds and preferred stock issuable as of December 31, 2011, at an assumed interest rate of 6% and dividend rate of 7%.

 

      Required Interest
Coverage Ratio(a)
   Actual Interest
Coverage Ratio
     Bonds Issuable(b)     Required Dividend
Coverage Ratio(c)
   Actual Dividend
Coverage Ratio
     Preferred Stock
Issuable
 

Ameren Missouri

             ³ 2.0      3.2       $     1,971      ³ 2.5      84.9       $ 1,610   

Ameren Illinois

              ³ 2.0      7.2         3,335 (d)    ³ 1.5      3.1         203   

 

(a) Coverage required on the annual interest charges on first mortgage bonds outstanding and to be issued. Coverage is not required in certain cases when additional first mortgage bonds are issued on the basis of retired bonds.
(b) Amount of bonds issuable based either on required coverage ratios or unfunded property additions, whichever is more restrictive. The amounts shown also include bonds issuable based on retired bond capacity of $89 million and $765 million at Ameren Missouri and Ameren Illinois, respectively.
(c) Coverage required on the annual dividend on preferred stock outstanding and to be issued, as required in the respective company's articles of incorporation.
(d) Amount of bonds issuable by Ameren Illinois based on unfunded property additions and retired bonds solely under the former IP mortgage indenture.

Ameren's indenture does not require Ameren to comply with any quantitative financial covenants. The indenture does, however, include certain cross-default provisions. Specifically, either (1) the failure by Ameren to pay when due and upon expiration of any applicable grace period any portion of any Ameren indebtedness in excess of $25 million or (2) the acceleration upon default of the maturity of any Ameren indebtedness in excess of $25 million under any indebtedness agreement, including the 2010 Credit Agreements, constitutes a default under the indenture, unless such past due or accelerated debt is discharged or the acceleration is rescinded or annulled within a specified period.

Ameren Missouri, Ameren Illinois, Genco and certain other nonregistrant Ameren subsidiaries are subject to Section 305(a) of the Federal Power Act, which makes it unlawful for any officer or director of a public utility, as defined in the Federal Power Act, to participate in the making or paying of any dividend from any funds "properly included in capital account." The meaning of this limitation has never been clarified under the Federal Power Act or FERC regulations. However, FERC has consistently interpreted the provision to allow dividends to be paid as long as (1) the source of the dividends is clearly disclosed, (2) the dividends are not excessive, and (3) there is no self-dealing on the part of corporate officials. At a minimum, Ameren believes that dividends can be paid by its subsidiaries that are public utilities from net income and retained earnings. In addition, under Illinois law, Ameren Illinois may not pay any dividend on their respective stock, unless, among other things, their respective earnings and earned surplus are sufficient to declare and pay a dividend after provision is made for reasonable and proper reserves, or unless Ameren Illinois has specific authorization from the ICC.

Ameren Illinois' articles of incorporation require its dividend payments on common stock to be based on ratios of common stock to total capitalization and other provisions related to certain operating expenses and accumulations of earned surplus. Ameren Illinois committed to FERC to maintain a minimum 30% ratio of common stock equity to total capitalization after the Ameren Illinois Merger and AERG distribution. As of December 31, 2011, Ameren Illinois' ratio of common stock equity to total capitalization was 58%.

Genco's indenture includes provisions that require Genco to maintain certain interest coverage and debt-to-capital ratios in order for Genco to pay dividends, to make principal or interest payments on subordinated borrowings, to make loans to or investments in affiliates, or to incur additional external, third-party indebtedness. The following table summarizes these ratios for the 12 months ended and as of December 31, 2011:

 

    

Required

Interest
Coverage
Ratio

 

Actual

Interest
Coverage
Ratio

    

Required

Debt-to-
Capital
Ratio

 

Actual

Debt-to-
Capital
Ratio

 

Genco

  ³ 1.75(a)/2.50(b)     4.3       £ 60% (b)     43

 

(a)

A minimum interest coverage ratio of 1.75 is required for Genco to make certain restricted payments, as defined, including specified dividend payments and, principal and interest payments on subordinated borrowings. As of the date of the restricted payment, the minimum ratio must have been achieved for the most recently ended four fiscal quarters and projected by management to be achieved for each of the subsequent four six-month periods. Investments in the non-state-regulated subsidiary money pool and repayments of non-state-regulated subsidiary money pool borrowings are not subject to this incurrence test.

(b) A minimum interest coverage ratio of 2.50 for the most recently ended four fiscal quarters and a debt-to-capital ratio of no greater than 60% are required for Genco to incur additional indebtedness, as defined, other than permitted indebtedness, as defined, for borrowed money. The ratios must be computed on a pro forma basis considering the additional indebtedness to be incurred and the related interest expense. Non-state-regulated subsidiary money pool borrowings are defined as permitted indebtedness and are not subject to these incurrence tests. Credit facility borrowings, including borrowings under the 2010 Genco Credit Agreement, and other borrowings from third-party, external sources are included in the definition of indebtedness and are subject to these incurrence tests.

 

Genco's debt incurrence-related ratio restrictions under its indenture may be disregarded if both Moody's and S&P reaffirm the ratings of Genco in place at the time of the debt incurrence after considering the additional indebtedness.

In order for the Ameren Companies to issue securities in the future, they will have to comply with all applicable requirements in effect at the time of any such issuances.

Off-Balance-Sheet Arrangements

At December 31, 2011, none of the Ameren Companies had any off-balance-sheet financing arrangements, other than operating leases entered into in the ordinary course of business. None of the Ameren Companies expect to engage in any significant off-balance-sheet financing arrangements in the near future.

NOTE 5 – LONG-TERM DEBT AND EQUITY FINANCINGS

The following table presents long-term debt outstanding for the Ameren Companies as of December 31, 2011, and 2010:

 

      2011      2010  

Ameren (Parent):

     

8.875% Senior unsecured notes due 2014

   $ 425       $ 425   

Less: Unamortized discount and premium

     (1      (2

Long-term debt, net

   $ 424       $ 423   

Ameren Missouri:

     

Senior secured notes:(a)

     

5.25% Senior secured notes due 2012

   $ 173       $ 173   

4.65% Senior secured notes due 2013

     200         200   

5.50% Senior secured notes due 2014

     104         104   

4.75% Senior secured notes due 2015

     114         114   

5.40% Senior secured notes due 2016

     260         260   

6.40% Senior secured notes due 2017

     425         425   

6.00% Senior secured notes due 2018(b)

     250         250   

5.10% Senior secured notes due 2018

     200         200   

6.70% Senior secured notes due 2019(b)

     450         450   

5.10% Senior secured notes due 2019

     300         300   

5.00% Senior secured notes due 2020

     85         85   

5.50% Senior secured notes due 2034

     184         184   

5.30% Senior secured notes due 2037

     300         300   

8.45% Senior secured notes due 2039(b)

     350         350   

Environmental improvement and pollution control revenue bonds:

     

1992 Series due 2022(c)(d)

     47         47   

1993 5.45% Series due 2028(e)

     44         44   

1998 Series A due 2033(c)(d)

     60         60   

1998 Series B due 2033(c)(d)

     50         50   

1998 Series C due 2033(c)(d)

     50         50   

Capital lease obligations:

     

City of Bowling Green capital lease (Peno Creek CT)

     69         74   

Audrain County capital lease (Audrain County CT)

     240         240   

Total long-term debt, gross

     3,955         3,960   

Less: Unamortized discount and premium

     (5      (6

Less: Maturities due within one year

     (178      (5

Long-term debt, net

   $     3,772       $     3,949   

Ameren Illinois:

     

Senior secured notes:

     

6.625% Senior secured notes due 2011

   $ -       $ 150   

8.875% Senior secured notes due 2013(f)(h)

     150         150   

6.20% Senior secured notes due 2016(f)

     54         54   

6.25% Senior secured notes due 2016(g)

     75         75   

6.125% Senior secured notes due 2017(g)(i)

     250         250   

6.25% Senior secured notes due 2018(g)(i)

     337         337   

9.75% Senior secured notes due 2018(g)(i)

     400         400   

6.125% Senior secured notes due 2028(g)

     60         60   

6.70% Senior secured notes due 2036(g)

     61         61   

6.70% Senior secured notes due 2036(f)

     42         42   

Environmental improvement and pollution control revenue bonds:

     

6.20% Series 1992B due 2012(j)

     1         1   

2000 Series A 5.50% due 2014

     51         51   

5.90% Series 1993 due 2023(j)

     32         32   

5.70% 1994A Series due 2024(k)

     36         36   

1993 Series C-1 5.95% due 2026

     35         35   

1993 Series C-2 5.70% due 2026

     8         8   

1993 Series B-1 due 2028(d)

     17         17   

5.40% 1998A Series due 2028(k)

     19         19   

5.40% 1998B Series due 2028(k)

     33         33   

Fair-market value adjustments

     5         5   

Total long-term debt, gross

     1,666         1,816   

Less: Unamortized discount and premium

     (8      (9

Less: Maturities due within one year

     (1      (150

Long-term debt, net

   $ 1,657       $ 1,657   

Genco:

     

Unsecured notes:

     

Senior notes Series F 7.95% due 2032

   $ 275       $ 275   

Senior notes Series H 7.00% due 2018

     300         300   

Senior notes Series I 6.30% due 2020

     250         250   

Total long-term debt, gross

     825         825   

Less: Unamortized discount and premium

     (1      (1

Less: Maturities due within one year

     -         -   

Long-term debt, net

   $ 824       $ 824   

Ameren consolidated long-term debt, net

   $     6,677       $     6,853   

 

(a) These notes are collaterally secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any first mortgage bonds issued under the UE mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2039.
(b) Ameren Missouri has agreed not to affect the release of first mortgage bonds securing these notes at any time during the life of these notes.
(c) These notes are secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture and have a fall-away lien provision similar to that of the company's senior secured notes. The notes are also backed by an insurance guarantee policy.
(d) Interest rates, and periods during which such rates apply, vary depending on our selection of defined rate modes. Maximum interest rates could range up to 18% depending on the series of bonds. The average interest rates for 2011 and 2010 were as follows:

 

    2011   2010

Ameren Missouri 1992 Series

  0.34%   0.47%

Ameren Missouri 1998 Series A

  0.69%   0.71%

Ameren Missouri 1998 Series B

  0.68%   0.73%

Ameren Missouri 1998 Series C

  0.69%   0.74%

Ameren Illinois 1993 Series B-1

  0.28%   0.59%

 

(e) These notes are first mortgage bonds issued by Ameren Missouri under the UE mortgage bond indenture and are secured by substantially all Ameren Missouri property and franchises. The notes are callable at 100% of par value.
(f)

These notes are collaterally secured by first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the CILCO mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2023.

(g) These notes are collaterally secured by mortgage bonds issued by Ameren Illinois under the IP mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the IP mortgage indenture remain outstanding. Redemption, purchase, or maturity of all mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Assuming no early redemption of outstanding bonds or notes, we do not expect the mortgage bond lien protection associated with these notes to fall away until 2028.
(h) Ameren Illinois has agreed not to affect a release of CILCO first mortgage bonds securing these notes at any time during the life of these notes.
(i) Ameren Illinois has agreed not to affect a release of IP mortgage bonds securing these notes at any time during the life of these notes.
(j) These notes are first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture and are secured by substantially all property of the former CILCO. The notes are callable at 100% of par value.
(k) These notes are mortgage bonds issued by Ameren Illinois under the IP mortgage indenture and are secured by substantially all property of the former IP and CIPS. The notes are callable at 100% of par value. The notes are also backed by an insurance guarantee policy.

The following table presents the aggregate maturities of long-term debt, including current maturities, for the Ameren Companies at December 31, 2011:

 

       

Ameren  

(Parent)(a)

       Ameren
Missouri(a)
       Ameren
Illinois(a)(b)
       Genco(a)       

Ameren

Consolidated

 

2012

     $ -         $ 178         $ 1         $ -         $ 179   

2013

       -           205           150           -           355   

2014

       425           109           51           -           585   

2015

       -           120           -           -           120   

2016

       -           266           129           -           395   

Thereafter

       -           3,077           1,330           825           5,232   

Total

     $     425         $     3,955         $     1,661         $     825         $     6,866   

 

(a) Excludes unamortized discount and premium of $1 million, $5 million, $8 million and $1 million at Ameren (Parent), Ameren Missouri, Ameren Illinois and Genco, respectively.
(b) Excludes $5 million related to Ameren Illinois' long-term debt fair-market value adjustments, which are being amortized to interest expense over the remaining life of the debt.

All of the Ameren Companies expect to fund maturities of long-term debt, short-term borrowings, credit facility borrowings, commercial paper and contractual obligations through a combination of cash flow from operations and external financing. See Note 4 – Short-Term Debt and Liquidity for a discussion of external financing availability.

All classes of Ameren Missouri's and Ameren Illinois' preferred stock are entitled to cumulative dividends and have voting rights. The following table presents the outstanding preferred stock of Ameren Missouri and Ameren Illinois that is not subject to mandatory redemption. The preferred stock is redeemable, at the option of the issuer, at the prices shown below as of December 31, 2011 and 2010:

 

                Redemption Price (per share)        2011        2010  

Ameren Missouri:

                

Without par value and stated value of $100 per share, 25 million shares authorized

            

$3.50 Series

 

130,000 shares

     $     110.00         $ 13         $ 13   

$3.70 Series

 

40,000 shares

       104.75           4           4   

$4.00 Series

 

150,000 shares

       105.625           15           15   

$4.30 Series

 

40,000 shares

       105.00           4           4   

$4.50 Series

 

213,595 shares

       110.00(a)           21           21   

$4.56 Series

 

200,000 shares

       102.47           20           20   

$4.75 Series

 

20,000 shares

       102.176           2           2   

$5.50 Series A

 

14,000 shares

         110.00              1           1   

Total

              $     80         $     80   

Ameren Illinois:

                

With par value of $100 per share, 2 million shares authorized

            

4.00% Series

 

144,275 shares

     $ 101.00         $ 14         $ 14   

4.08% Series

 

45,224 shares

       103.00           5           5   

4.20% Series

 

23,655 shares

       104.00           2           2   

4.25% Series

 

50,000 shares

       102.00           5           5   

4.26% Series

 

16,621 shares

       103.00           2           2   

4.42% Series

 

16,190 shares

       103.00           2           2   

4.70% Series

 

18,429 shares

       103.00           2           2   

4.90% Series

 

73,825 shares

       102.00           7           7   

4.92% Series

 

49,289 shares

       103.50           5           5   

5.16% Series

 

50,000 shares

       102.00           5           5   

6.625% Series

 

124,273.75 shares

       100.00           12           12   

7.75% Series

 

4,542 shares

         100.00           1           1   

Total

              $ 62         $ 62   

Total Ameren

              $     142         $     142   

 

(a) In the event of voluntary liquidation, $105.50.

Pursuant to the Ameren Illinois Merger: (i) every two shares of each series of IP preferred stock outstanding immediately prior to the Ameren Illinois Merger were automatically converted into one share of a newly created series of Ameren Illinois preferred stock having the same payment and redemption terms as the existing series of IP preferred stock, except to the extent that IP preferred stockholders exercised their dissenters' rights in accordance with Illinois law; and (ii) each outstanding share of CIPS common and preferred stock remained outstanding, except to the extent that CIPS preferred stockholders exercised their dissenters' rights in accordance with Illinois law. Stockholders holding 8,337 shares and 423 shares of CIPS and IP preferred stock, respectively, exercised their dissenter's rights.

In addition, Ameren has 100 million shares of $0.01 par value preferred stock authorized, with no shares outstanding. Ameren Missouri has 7.5 million shares of $1 par value preference stock authorized, with no such preference stock outstanding. Ameren Illinois has 2.6 million shares of no par value preferred stock authorized, with no shares outstanding.

Ameren

A Form S-3 registration statement was filed by Ameren with the SEC in June 2011, authorizing the offering of 6 million additional shares of its common stock under DRPlus. Shares of common stock sold under DRPlus are, at Ameren's option, newly issued shares, treasury shares, or shares purchased in the open market or in privately negotiated transactions. In 2012, Ameren plans for shares to be purchased in the open market for DRPlus and its 401(k) plan. Under DRPlus and its 401(k) plan, Ameren issued 2.2 million, 3.0 million, and 3.2 million shares of common stock in 2011, 2010, and 2009, respectively, which were valued at $65 million, $80 million, and $82 million for the respective years.

In February 2010, CILCORP completed a covenant defeasance of its remaining outstanding 9.375% senior bonds due 2029 by depositing $3 million in U.S. government obligations and cash with the indenture trustee. This deposit will be used solely to satisfy the principal and remaining interest obligations on these bonds. In connection with this covenant defeasance, the lien on the capital stock of CILCO securing these bonds was released.

Ameren Missouri

In August 2010, Ameren Missouri redeemed all $33 million of its $7.64 Series preferred stock at $100.85 per share, plus accrued and unpaid dividends.

In September 2010, Ameren Missouri redeemed all $66 million of its 7.69% Series A subordinated deferrable interest debentures at a redemption price of 102.692% of the principal amount plus accrued interest.

Ameren Illinois

In June 2011, Ameren Illinois' 6.625% $150 million senior secured notes matured and were repaid and retired using available cash on hand.

In August 2010, Ameren Illinois (formerly CILCO) redeemed all of the 111,264 outstanding shares of its 4.50% Series preferred stock at $110 per share and all of the 79,940 shares of its 4.64% Series preferred stock at $102 per share, plus, in each case, accrued and unpaid dividends. These preferred shares were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren Illinois (formerly CIPS) redeemed all $40 million of its 7.61% Series 1997-2 first mortgage bonds at a redemption price of 101.52% of the principal amount, plus accrued interest. These bonds were redeemed in connection with the Ameren Illinois Merger.

In September 2010, Ameren contributed to the capital of Ameren Illinois (formerly IP), without the payment of any consideration, all of the IP preferred stock owned by Ameren ($33 million). IP cancelled these preferred shares. This transaction was completed in connection with the Ameren Illinois Merger.

 

 

See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

Genco

In November 2010, Genco's $200 million 8.35% senior notes matured and were retired with available cash on hand.

 

Indenture Provisions and Other Covenants

Ameren Missouri's and Ameren Illinois' indentures and articles of incorporation include covenants and provisions related to issuances of first mortgage bonds and preferred stock. Ameren Missouri and Ameren Illinois are required to meet certain ratios to issue additional first mortgage bonds and preferred stock. However, a failure to achieve these ratios would not result in a default under these covenants and provisions but would restrict the companies' ability to issue bonds or preferred stock. The following table summarizes the required and actual interest coverage ratios for interest charges and dividend coverage ratios and bonds and preferred stock issuable as of December 31, 2011, at an assumed interest rate of 6% and dividend rate of 7%.

 

      Required Interest
Coverage Ratio(a)
   Actual Interest
Coverage Ratio
     Bonds Issuable(b)     Required Dividend
Coverage Ratio(c)
   Actual Dividend
Coverage Ratio
     Preferred Stock
Issuable
 

Ameren Missouri

             ³ 2.0      3.2       $     1,971      ³ 2.5      84.9       $ 1,610   

Ameren Illinois

              ³ 2.0      7.2         3,335 (d)    ³ 1.5      3.1         203   

 

(a) Coverage required on the annual interest charges on first mortgage bonds outstanding and to be issued. Coverage is not required in certain cases when additional first mortgage bonds are issued on the basis of retired bonds.
(b) Amount of bonds issuable based either on required coverage ratios or unfunded property additions, whichever is more restrictive. The amounts shown also include bonds issuable based on retired bond capacity of $89 million and $765 million at Ameren Missouri and Ameren Illinois, respectively.
(c) Coverage required on the annual dividend on preferred stock outstanding and to be issued, as required in the respective company's articles of incorporation.
(d) Amount of bonds issuable by Ameren Illinois based on unfunded property additions and retired bonds solely under the former IP mortgage indenture.

Ameren's indenture does not require Ameren to comply with any quantitative financial covenants. The indenture does, however, include certain cross-default provisions. Specifically, either (1) the failure by Ameren to pay when due and upon expiration of any applicable grace period any portion of any Ameren indebtedness in excess of $25 million or (2) the acceleration upon default of the maturity of any Ameren indebtedness in excess of $25 million under any indebtedness agreement, including the 2010 Credit Agreements, constitutes a default under the indenture, unless such past due or accelerated debt is discharged or the acceleration is rescinded or annulled within a specified period.

Ameren Missouri, Ameren Illinois, Genco and certain other nonregistrant Ameren subsidiaries are subject to Section 305(a) of the Federal Power Act, which makes it unlawful for any officer or director of a public utility, as defined in the Federal Power Act, to participate in the making or paying of any dividend from any funds "properly included in capital account." The meaning of this limitation has never been clarified under the Federal Power Act or FERC regulations. However, FERC has consistently interpreted the provision to allow dividends to be paid as long as (1) the source of the dividends is clearly disclosed, (2) the dividends are not excessive, and (3) there is no self-dealing on the part of corporate officials. At a minimum, Ameren believes that dividends can be paid by its subsidiaries that are public utilities from net income and retained earnings. In addition, under Illinois law, Ameren Illinois may not pay any dividend on their respective stock, unless, among other things, their respective earnings and earned surplus are sufficient to declare and pay a dividend after provision is made for reasonable and proper reserves, or unless Ameren Illinois has specific authorization from the ICC.

Ameren Illinois' articles of incorporation require its dividend payments on common stock to be based on ratios of common stock to total capitalization and other provisions related to certain operating expenses and accumulations of earned surplus. Ameren Illinois committed to FERC to maintain a minimum 30% ratio of common stock equity to total capitalization after the Ameren Illinois Merger and AERG distribution. As of December 31, 2011, Ameren Illinois' ratio of common stock equity to total capitalization was 58%.

Genco's indenture includes provisions that require Genco to maintain certain interest coverage and debt-to-capital ratios in order for Genco to pay dividends, to make principal or interest payments on subordinated borrowings, to make loans to or investments in affiliates, or to incur additional external, third-party indebtedness. The following table summarizes these ratios for the 12 months ended and as of December 31, 2011:

 

    

Required

Interest
Coverage
Ratio

 

Actual

Interest
Coverage
Ratio

    

Required

Debt-to-
Capital
Ratio

 

Actual

Debt-to-
Capital
Ratio

 

Genco

  ³ 1.75(a)/2.50(b)     4.3       £ 60% (b)     43

 

(a)

A minimum interest coverage ratio of 1.75 is required for Genco to make certain restricted payments, as defined, including specified dividend payments and, principal and interest payments on subordinated borrowings. As of the date of the restricted payment, the minimum ratio must have been achieved for the most recently ended four fiscal quarters and projected by management to be achieved for each of the subsequent four six-month periods. Investments in the non-state-regulated subsidiary money pool and repayments of non-state-regulated subsidiary money pool borrowings are not subject to this incurrence test.

(b) A minimum interest coverage ratio of 2.50 for the most recently ended four fiscal quarters and a debt-to-capital ratio of no greater than 60% are required for Genco to incur additional indebtedness, as defined, other than permitted indebtedness, as defined, for borrowed money. The ratios must be computed on a pro forma basis considering the additional indebtedness to be incurred and the related interest expense. Non-state-regulated subsidiary money pool borrowings are defined as permitted indebtedness and are not subject to these incurrence tests. Credit facility borrowings, including borrowings under the 2010 Genco Credit Agreement, and other borrowings from third-party, external sources are included in the definition of indebtedness and are subject to these incurrence tests.

 

Genco's debt incurrence-related ratio restrictions under its indenture may be disregarded if both Moody's and S&P reaffirm the ratings of Genco in place at the time of the debt incurrence after considering the additional indebtedness.

In order for the Ameren Companies to issue securities in the future, they will have to comply with all applicable requirements in effect at the time of any such issuances.

Off-Balance-Sheet Arrangements

At December 31, 2011, none of the Ameren Companies had any off-balance-sheet financing arrangements, other than operating leases entered into in the ordinary course of business. None of the Ameren Companies expect to engage in any significant off-balance-sheet financing arrangements in the near future.

Other Income And Expenses

NOTE 6 – OTHER INCOME AND EXPENSES

The following table presents the components of "Other Income and Expenses" in the Ameren Companies' statements of income for the years ended December 31, 2011, 2010, and 2009:

 

NOTE 6 – OTHER INCOME AND EXPENSES

The following table presents the components of "Other Income and Expenses" in the Ameren Companies' statements of income for the years ended December 31, 2011, 2010, and 2009:

 

     2011      2010      2009  

Ameren:(a)

        

Miscellaneous income:

        

Interest and dividend income

   $ 4       $ 5       $ 2   

Interest income on industrial development revenue bonds

     28         28         28   

Allowance for equity funds used during construction

     34         52         36   

Other

     3         5         5   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 69       $ 90       $ 71   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 8       $ 19       $ 12   

Other

     15         14         11   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 23       $ 33       $ 23   
  

 

 

    

 

 

    

 

 

 

Ameren Missouri:

        

Miscellaneous income:

        

Interest and dividend income

   $ 2       $ 3       $ 1   

Interest income on industrial development revenue bonds

     28         28         28   

Allowance for equity funds used during construction

     30         50         33   

Other

     1         2         1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 61       $ 83       $ 63   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 3       $ 8       $ 3   

Other

     7         5         4   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 10       $ 13       $ 7   
  

 

 

    

 

 

    

 

 

 

Ameren Illinois:

        

Miscellaneous income:

        

Interest and dividend income

   $ 1       $ 1       $ 6   

Allowance for equity funds used during construction

     4         2         2   

Other

     2         4         4   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 7       $ 7       $ 12   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 1       $ 5       $ 4   

Other

     5         8         6   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 6       $ 13       $ 10   
  

 

 

    

 

 

    

 

 

 

Genco:

        

Miscellaneous income:

        

Other

   $ 1       $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 1       $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Other

   $ —         $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ —         $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

NOTE 6 – OTHER INCOME AND EXPENSES

The following table presents the components of "Other Income and Expenses" in the Ameren Companies' statements of income for the years ended December 31, 2011, 2010, and 2009:

 

     2011      2010      2009  

Ameren:(a)

        

Miscellaneous income:

        

Interest and dividend income

   $ 4       $ 5       $ 2   

Interest income on industrial development revenue bonds

     28         28         28   

Allowance for equity funds used during construction

     34         52         36   

Other

     3         5         5   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 69       $ 90       $ 71   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 8       $ 19       $ 12   

Other

     15         14         11   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 23       $ 33       $ 23   
  

 

 

    

 

 

    

 

 

 

Ameren Missouri:

        

Miscellaneous income:

        

Interest and dividend income

   $ 2       $ 3       $ 1   

Interest income on industrial development revenue bonds

     28         28         28   

Allowance for equity funds used during construction

     30         50         33   

Other

     1         2         1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 61       $ 83       $ 63   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 3       $ 8       $ 3   

Other

     7         5         4   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 10       $ 13       $ 7   
  

 

 

    

 

 

    

 

 

 

Ameren Illinois:

        

Miscellaneous income:

        

Interest and dividend income

   $ 1       $ 1       $ 6   

Allowance for equity funds used during construction

     4         2         2   

Other

     2         4         4   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 7       $ 7       $ 12   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 1       $ 5       $ 4   

Other

     5         8         6   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 6       $ 13       $ 10   
  

 

 

    

 

 

    

 

 

 

Genco:

        

Miscellaneous income:

        

Other

   $ 1       $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 1       $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Other

   $ —         $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ —         $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

NOTE 6 – OTHER INCOME AND EXPENSES

The following table presents the components of "Other Income and Expenses" in the Ameren Companies' statements of income for the years ended December 31, 2011, 2010, and 2009:

 

     2011      2010      2009  

Ameren:(a)

        

Miscellaneous income:

        

Interest and dividend income

   $ 4       $ 5       $ 2   

Interest income on industrial development revenue bonds

     28         28         28   

Allowance for equity funds used during construction

     34         52         36   

Other

     3         5         5   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 69       $ 90       $ 71   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 8       $ 19       $ 12   

Other

     15         14         11   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 23       $ 33       $ 23   
  

 

 

    

 

 

    

 

 

 

Ameren Missouri:

        

Miscellaneous income:

        

Interest and dividend income

   $ 2       $ 3       $ 1   

Interest income on industrial development revenue bonds

     28         28         28   

Allowance for equity funds used during construction

     30         50         33   

Other

     1         2         1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 61       $ 83       $ 63   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 3       $ 8       $ 3   

Other

     7         5         4   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 10       $ 13       $ 7   
  

 

 

    

 

 

    

 

 

 

Ameren Illinois:

        

Miscellaneous income:

        

Interest and dividend income

   $ 1       $ 1       $ 6   

Allowance for equity funds used during construction

     4         2         2   

Other

     2         4         4   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 7       $ 7       $ 12   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Donations

   $ 1       $ 5       $ 4   

Other

     5         8         6   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ 6       $ 13       $ 10   
  

 

 

    

 

 

    

 

 

 

Genco:

        

Miscellaneous income:

        

Other

   $ 1       $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous income

   $ 1       $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Miscellaneous expense:

        

Other

   $ —         $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

Total miscellaneous expense

   $ —         $ 1       $ 1   
  

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
Derivative Financial Instruments

NOTE 7 – DERIVATIVE FINANCIAL INSTRUMENTS

We use derivatives principally to manage the risk of changes in market prices for natural gas, coal, diesel, power, and uranium. Such price fluctuations may cause the following:

 

Ÿ  

an unrealized appreciation or depreciation of our contracted commitments to purchase or sell when purchase or sale prices under the commitments are compared with current commodity prices;

Ÿ  

market values of coal, natural gas, and uranium inventories that differ from the cost of those commodities in inventory; and

Ÿ  

actual cash outlays for the purchase of these commodities that differ from anticipated cash outlays.

The derivatives that we use to hedge these risks are governed by our risk management policies for forward contracts, futures, options, and swaps. Our net positions are continually assessed within our structured hedging programs to determine whether new or offsetting transactions are required. The goal of the hedging program is generally to mitigate financial risks while ensuring that sufficient volumes are available to meet our requirements. Contracts we enter into as part of our risk management program may be settled financially, settled by physical delivery, or net settled with the counterparty.

 

The following table presents open gross derivative volumes by commodity type as of December 31, 2011 and 2010:

 

 

Authoritative accounting guidance regarding derivative instruments requires that all contracts considered to be derivative instruments be recorded on the balance sheet at their fair values, unless the NPNS exception applies. See Note 8 – Fair Value Measurements for discussion of our methods of assessing the fair value of derivative instruments. Many of our physical contracts, such as our coal and purchased power contracts, qualify for the NPNS exception to derivative accounting rules. The revenue or expense recorded in connection with NPNS contracts is recognized at the contract price upon physical delivery.

If we determine that a contract meets the definition of a derivative and is not eligible for the NPNS exception, we review the contract to determine if it qualifies for hedge accounting treatment. We also consider whether gains or losses resulting from such derivatives qualify for regulatory deferral. Contracts that qualify for cash flow hedge accounting treatment are recorded at fair value with changes in fair value charged or credited to accumulated OCI in the period in which the change occurs, to the extent the hedge is effective. To the extent the hedge is ineffective, the related changes in fair value are charged or credited to the statement of income in the period in which the change occurs. When the contract is settled or delivered, the net gain or loss is recorded in the statement of income.

Derivative contracts that qualify for regulatory deferral are recorded at fair value, with changes in fair value recorded as regulatory assets or regulatory liabilities in the period in which the change occurs. Ameren Missouri and Ameren Illinois believe derivative gains and losses deferred as regulatory assets and regulatory liabilities are probable of recovery or refund through future rates charged to customers. Regulatory assets and regulatory liabilities are amortized to operating income as related losses and gains are reflected in rates charged to customers. Therefore, gains and losses on these derivatives have no effect on operating income.

Certain derivative contracts are entered into on a regular basis as part of our risk management program but do not qualify for the NPNS exception, hedge accounting, or regulatory deferral accounting. Such contracts are recorded at fair value, with changes in fair value charged or credited to the statement of income in the period in which the change occurs.

Authoritative accounting guidance permits companies to offset fair value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a liability) against fair value amounts recognized for derivative instruments that are executed with the same counterparty under the same master netting arrangement. The Ameren Companies did not elect to adopt this guidance for any eligible financial instruments or other items.

 

The following table presents the carrying value and balance sheet location of all derivative instruments as of December 31, 2011 and 2010:

 

 

The following table presents the cumulative amount of pretax net gains (losses) on all derivative instruments in accumulated OCI and regulatory assets or regulatory liabilities as of December 31, 2011 and 2010:

 

Derivative instruments are subject to various credit-related losses in the event of nonperformance by counterparties to the transaction. Exchange-traded contracts are supported by the financial and credit quality of the clearing members of the respective exchanges and have nominal credit risk. In all other transactions, we are exposed to credit risk. Our credit risk management program involves establishing credit limits and collateral requirements for counterparties, using master trading and netting agreements, and reporting daily exposure to senior management.

 

We believe that entering into master trading and netting agreements mitigates the level of financial loss that could result from default by allowing net settlement of derivative assets and liabilities. We generally enter into the following master trading and netting agreements: (1) the International Swaps and Derivatives Association Agreement, a standardized financial natural gas and electric contract; (2) the Master Power Purchase and Sale Agreement, created by the Edison Electric Institute and the National Energy Marketers Association, a standardized contract for the purchase and sale of wholesale power; and (3) the North American Energy Standards Board Inc. agreement, a standardized contract for the purchase and sale of natural gas. These master trading and netting agreements allow the counterparties to net settle sale and purchase transactions. Further, collateral requirements are calculated at a master trading and netting agreement level by counterparty.

Concentrations of Credit Risk

In determining our concentrations of credit risk related to derivative instruments, we review our individual counterparties and categorize each counterparty into one of eight groupings according to the primary business in which each engages. The following table presents the maximum exposure, as of December 31, 2011, and 2010, if counterparty groups were to fail completely to perform on contracts by grouping. The maximum exposure is based on the gross fair value of financial instruments, including NPNS contracts, which excludes collateral held, and does not consider the legally binding right to net transactions based on master trading and netting agreements.

 

The potential loss on counterparty exposures is reduced by the application of master trading and netting agreements and collateral held to the extent of reducing the exposure to zero. Collateral includes both cash collateral and other collateral held. The amount of cash collateral held by Marketing Company from counterparties and based on the contractual rights under the agreements to seek collateral and the maximum exposure as calculated under the individual master trading and netting agreements was less than $1 million and $1 million from retail companies at December 31, 2011 and 2010, respectively. There was no cash collateral held at Ameren registrant subsidiaries. As of December 31, 2011, other collateral used to reduce exposure consisted of letters of credit in the amount of $9 million, $1 million, $1 million, and $7 million held by Ameren, Ameren Missouri, Genco, and Marketing Company, respectively. As of December 31, 2010, other collateral used to reduce exposure consisted of letters of credit in the amount of $28 million and $1 million held by Ameren and Ameren Illinois, respectively. The following table presents the potential loss after consideration of the application of master trading and netting agreements and collateral held as of December 31, 2011 and 2010:

 

Derivative Instruments with Credit Risk-Related Contingent Features

Our commodity contracts contain collateral provisions tied to the Ameren Companies' credit ratings. If we were to experience an adverse change in our credit ratings, or if a counterparty with reasonable grounds for uncertainty regarding performance of an obligation requested adequate assurance of performance, additional collateral postings might be required. The following table presents, as of December 31, 2011, and 2010, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a gross liability position, the cash collateral posted, and the aggregate amount of additional collateral that could be required to be posted with counterparties. The additional collateral required is the net liability position allowed under the master trading and netting agreements assuming (1) the credit risk-related contingent features underlying these agreements were triggered on December 31, 2011, or 2010, respectively, and (2) those counterparties with rights to do so requested collateral:

 

 

Cash Flow Hedges

The following table presents the pretax net gain or loss for the year ended December 31, 2011 and 2010, associated with derivative instruments designated as cash flow hedges:

 

Other Derivatives

The following table represents the net change in market value associated with derivatives not designated as hedging instruments for the years ended December 31, 2011 and 2010:

 

 

 

Derivatives Subject to Regulatory Deferral

The following table represents the net change in market value associated with derivatives that qualify for regulatory deferral for the years ended December 31, 2011 and 2010:

 

As part of the 2007 Illinois Electric Settlement Agreement and subsequent Illinois power procurement processes, Ameren Illinois entered into financial contracts with Marketing Company. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives that qualify for regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities by Ameren Illinois and OCI by Marketing Company. In Ameren's consolidated financial statements, all financial statement effects of the derivative instruments entered into among affiliates were eliminated. See Note 14 – Related Party Transactions for additional information on these financial contracts. The following table presents the fair value of the financial contracts included on Ameren Illinois' balance sheet at December 31, 2011 and 2010:

 

            2011      2010  

Ameren Illinois

   MTM derivative liabilities - affiliates    $ 200       $ 172   
     Other deferred credits and liabilities      -         178   
     Total    $ 200       $ 350

NOTE 7 – DERIVATIVE FINANCIAL INSTRUMENTS

We use derivatives principally to manage the risk of changes in market prices for natural gas, coal, diesel, power, and uranium. Such price fluctuations may cause the following:

 

Ÿ  

an unrealized appreciation or depreciation of our contracted commitments to purchase or sell when purchase or sale prices under the commitments are compared with current commodity prices;

Ÿ  

market values of coal, natural gas, and uranium inventories that differ from the cost of those commodities in inventory; and

Ÿ  

actual cash outlays for the purchase of these commodities that differ from anticipated cash outlays.

The derivatives that we use to hedge these risks are governed by our risk management policies for forward contracts, futures, options, and swaps. Our net positions are continually assessed within our structured hedging programs to determine whether new or offsetting transactions are required. The goal of the hedging program is generally to mitigate financial risks while ensuring that sufficient volumes are available to meet our requirements. Contracts we enter into as part of our risk management program may be settled financially, settled by physical delivery, or net settled with the counterparty.

 

The following table presents open gross derivative volumes by commodity type as of December 31, 2011 and 2010:

 

      Quantity (in millions, except as indicated)  
Commodity   

NPNS

Contracts(a)

    Cash Flow
Hedges(b)
   

Other

Derivatives(c)

    Derivatives That Qualify for
Regulatory Deferral(d)
 
     2011     2010     2011     2010     2011     2010     2011     2010  

Coal (in tons)

                

Ameren Missouri

     116        46        (e     (e     (e     (e     (e     (e

Genco

     24        21        (e     (e     (e     (e     (e     (e

Other(f)

     7        6        (e     (e     (e     (e     (e     (e

Ameren

     147        73        (e     (e     (e     (e     (e     (e

Fuel oils (in gallons)(g)

                

Ameren Missouri

     (e     (e     (e     (e     (e     (e     53        80   

Genco

     (e     (e     (e     (e     27        43        (e     (e

Other(f)

     (e     (e     (e     (e     9        12        (e     (e

Ameren

     (e     (e     (e     (e     36        55        53        80   

Natural gas (in mmbtu)

                

Ameren Missouri

     8        13        (e     (e     9        2        19        21   

Ameren Illinois

     42        85        (e     (e     (e     (e     174        173   

Genco

     (e     (e     (e     (e     7        3        (e     (e

Other(f)

     (e     (e     (e     (e     1        16        (e     (e

Ameren

     50        98        (e     (e     17        21        193        194   

Power (in megawatthours)

                

Ameren Missouri

     1        2        (e     (e     1        1        6        5   

Ameren Illinois

     11        (e     (e     (e     (e     (e     24        26   

Genco

     (e     (e     (e     (e     -        3        (e     (e

Other(f)

     61        61        17        2        30        57        (9     (13

Ameren

     73        63        17        2        31        61        21        18   

Uranium (pounds in thousands)

                

Ameren Missouri & Ameren

     5,553        5,810        (e     (e     (e     (e     148        185   

 

(a) Contracts through December 2017, March 2015, September 2035, and October 2024 for coal, natural gas, power, and uranium, respectively, as of December 31, 2011.
(b) Contracts through December 2014 for power as of December 31, 2011.
(c) Contracts through October 2014, December 2012, and December 2015 for fuel oils, natural gas, and power, respectively, as of December 31, 2011.
(d) Contracts through October 2014, October 2016, May 2032, and December 2013 for fuel oils, natural gas, power, and uranium, respectively, as of December 31, 2011.
(e) Not applicable.
(f) Includes AERG contracts for coal and fuel oils, Marketing Company contracts for natural gas and power, and intercompany eliminations for power.
(g) Fuel oils consist of heating and crude oil.

 

Authoritative accounting guidance regarding derivative instruments requires that all contracts considered to be derivative instruments be recorded on the balance sheet at their fair values, unless the NPNS exception applies. See Note 8 – Fair Value Measurements for discussion of our methods of assessing the fair value of derivative instruments. Many of our physical contracts, such as our coal and purchased power contracts, qualify for the NPNS exception to derivative accounting rules. The revenue or expense recorded in connection with NPNS contracts is recognized at the contract price upon physical delivery.

If we determine that a contract meets the definition of a derivative and is not eligible for the NPNS exception, we review the contract to determine if it qualifies for hedge accounting treatment. We also consider whether gains or losses resulting from such derivatives qualify for regulatory deferral. Contracts that qualify for cash flow hedge accounting treatment are recorded at fair value with changes in fair value charged or credited to accumulated OCI in the period in which the change occurs, to the extent the hedge is effective. To the extent the hedge is ineffective, the related changes in fair value are charged or credited to the statement of income in the period in which the change occurs. When the contract is settled or delivered, the net gain or loss is recorded in the statement of income.

Derivative contracts that qualify for regulatory deferral are recorded at fair value, with changes in fair value recorded as regulatory assets or regulatory liabilities in the period in which the change occurs. Ameren Missouri and Ameren Illinois believe derivative gains and losses deferred as regulatory assets and regulatory liabilities are probable of recovery or refund through future rates charged to customers. Regulatory assets and regulatory liabilities are amortized to operating income as related losses and gains are reflected in rates charged to customers. Therefore, gains and losses on these derivatives have no effect on operating income.

Certain derivative contracts are entered into on a regular basis as part of our risk management program but do not qualify for the NPNS exception, hedge accounting, or regulatory deferral accounting. Such contracts are recorded at fair value, with changes in fair value charged or credited to the statement of income in the period in which the change occurs.

Authoritative accounting guidance permits companies to offset fair value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a liability) against fair value amounts recognized for derivative instruments that are executed with the same counterparty under the same master netting arrangement. The Ameren Companies did not elect to adopt this guidance for any eligible financial instruments or other items.

 

The following table presents the carrying value and balance sheet location of all derivative instruments as of December 31, 2011 and 2010:

 

      Balance Sheet Location      Ameren(a)        Ameren
Missouri
     Ameren
Illinois
     Genco  

2011:

                  

Derivative assets designated as hedging instruments

               

Commodity contracts:            

                  

Power

   MTM derivative assets      $ 8         $ (b    $ (b    $ -   
     Other assets        16           -         -         -   
     Total assets      $ 24         $ -       $ -       $ -   

Derivative liabilities designated as hedging instruments

               

Commodity contracts:

                  

Power

   Other deferred credits and liabilities      $ 1         $ -       $ -       $ -   
     Total liabilities      $ 1         $ -       $ -       $ -   

Derivative assets not designated as hedging instruments(c)

               

Commodity contracts:

                  

Fuel oils

   MTM derivative assets      $ 29         $ (b    $ (b    $ 10   
   Other current assets        -           17         -         -   
   Other assets        8           6         -         1   

Natural gas

   MTM derivative assets        6           (b      (b      2   
   Other current assets        -           2         1         -   
   Other assets        -           -         1         -   

Power

   MTM derivative assets        72           (b      (b      -   
   Other current assets        -           30         -         -   
     Other assets        99           -         77         -   
     Total assets      $         214         $         55       $         79       $         13   

Derivative liabilities not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative liabilities      $ 2       $ (b    $ -       $ 1   
   Other current liabilities        -         1         -         -   

Natural gas

   MTM derivative liabilities        106         (b      90         2   
   Other current liabilities        -         13         -         -   
   Other deferred credits and liabilities        92         13         79         -   

Power

   MTM derivative liabilities        53         (b      9         -   
   MTM derivative liabilities - affiliates        (b      (b      200         -   
   Other current liabilities        -         9         -         -   
   Other deferred credits and liabilities        26         -         8         -   

Uranium

   Other deferred credits and liabilities        1         1         -         -   
     Total liabilities      $ 280       $ 37       $ 386       $ 3   

2010:

                

Derivative assets designated as hedging instruments

             

Commodity contracts:

                

Power

   MTM derivative assets      $ 3       $ (b    $ (b    $ -   
     Other assets        2         -         -         -   
     Total assets      $ 5       $ -       $ -       $ -   

Derivative liabilities designated as hedging instruments

             

Commodity contracts:

                

Power

   MTM derivative liabilities      $ 1       $ (b    $ -       $ -   
     Total liabilities      $ 1       $ -       $ -       $ -   

Derivative assets not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative assets      $ 42       $ (b    $ (b    $ 14   
   Other current assets        -         24         -         -   
   Other assets        22         13         -         7   

Natural gas

   MTM derivative assets        4         (b      (b      1   
   Other current assets        -         1         1         -   
   Other assets        1         -         1         -   

Power

   MTM derivative assets        78         (b      (b      11   
   Other current assets        -         8         2         -   
   Other assets        20         -         6         -   

Uranium

   MTM derivative assets        2         (b      (b      -   
     Other current assets        -         2         -         -   
     Total assets      $ 169       $ 48       $ 10       $ 33   

Derivative liabilities not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative liabilities      $ 12       $ (b    $ -       $ 4   
   Other current liabilities        -         7         -         -   
   Other deferred credits and liabilities        1         -         -         -   

Natural gas

   MTM derivative liabilities        87         (b      73         2   
   Other current liabilities        -         11         -         -   
   Other deferred credits and liabilities        84         13         70         -   

Power

   MTM derivative liabilities        61         (b      9         3   
   MTM derivative liabilities - affiliates        (b      (b      172         5   
   Other current liabilities        -         6         -         -   
     Other deferred credits and liabilities        7         -         179         -   
     Total liabilities      $         252       $         37       $         503       $         14   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Balance sheet line item not applicable to registrant.
(c) Includes derivatives subject to regulatory deferral.

 

The following table presents the cumulative amount of pretax net gains (losses) on all derivative instruments in accumulated OCI and regulatory assets or regulatory liabilities as of December 31, 2011 and 2010:

 

        Ameren      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(a)  

2011:

                

Cumulative gains (losses) deferred in accumulated OCI:

                

Power derivative contracts(b)

     $ 19       $ -       $ -       $ -       $ 19   

Interest rate derivative contracts(c)(d)

       (8      -         -         (8      -   

Cumulative gains (losses) deferred in regulatory liabilities or assets:

                

Fuel oils derivative contracts(e)

       19         19         -         -         -   

Natural gas derivative contracts(f)

       (191      (24      (167      -         -   

Power derivative contracts(g)

       81         21         (140      -         200   

Uranium derivative contracts(h)

       (1      (1      -         -         -   

2010:

                

Cumulative gains (losses) deferred in accumulated OCI:

                

Power derivative contracts(b)

     $ 8       $ -       $ -       $ -       $ 8   

Interest rate derivative contracts(c)(d)

       (9      -         -         (9      -   

Cumulative gains (losses) deferred in regulatory liabilities or assets:

                

Fuel oils derivative contracts(e)

       19         19         -         -         -   

Natural gas derivative contracts(f)

       (165      (24      (141      -         -   

Power derivative contracts(g)

       1         3         (352      -         350   

Uranium derivative contracts(h)

       2         2         -         -         -   

 

(a) Includes amounts for Marketing Company and intercompany eliminations.
(b) Represents net gains associated with power derivative contracts at Ameren. These contracts are a partial hedge of electricity price exposure through December 2014 as of December 31, 2011. Current gains of $5 million and $8 million were recorded at Ameren as of December 31, 2011, and December 31, 2010, respectively.
(c) Includes net gains associated with interest rate swaps at Genco that were a partial hedge of the interest rate on debt issued in June 2002. The swaps cover the first 10 years of debt that has a 30-year maturity, and the gain in OCI is amortized over a 10-year period that began in June 2002. The carrying value at December 31, 2011, and December 31, 2010 was less than $1 million and less than $1 million, respectively. The balance of the gain will be amortized by June 2012.
(d) Includes net losses associated with interest rate swaps at Genco. The swaps were executed during the fourth quarter of 2007 as a partial hedge of interest rate risks associated with Genco's April 2008 debt issuance. The loss on the interest rate swaps is being amortized over a 10-year period that began in April 2008. The carrying value at December 31, 2011, and December 31, 2010, was a loss of $9 million and a loss of $10 million, respectively. Over the next 12 months, $1.4 million of the loss will be amortized.
(e) Represents net gains on fuel oils derivative contracts at Ameren Missouri. These contracts are a partial hedge of Ameren Missouri's transportation costs for coal through October 2014 as of December 31, 2011. Current gains deferred as regulatory liabilities include $16 million and $16 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current losses deferred as regulatory assets include $1 million and $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $13 million and $13 million at Ameren and Ameren Missouri as of December 31, 2010, respectively. Current losses deferred as regulatory assets include $6 million and $6 million at Ameren and Ameren Missouri as of December 31, 2010, respectively.
(f) Represents net losses associated with natural gas derivative contracts. These contracts are a partial hedge of natural gas requirements through October 2016 at Ameren, Ameren Missouri, and Ameren Illinois in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $1 million and $1 million at Ameren and Ameren Illinois, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $101 million, $11 million, and $90 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $2 million, $1 million, and $1 million at Ameren, Ameren Missouri, and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $84 million, $11 million, and $73 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
(g) Represents net losses associated with power derivative contracts. These contracts are a partial hedge of power price requirements through May 2032 at Ameren and Ameren Illinois and through December 2015 at Ameren Missouri, in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $29 million and $29 million at Ameren and Ameren Missouri, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $17 million, $8 million, and $209 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $8 million, $6 million, and $2 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $13 million, $3 million, and $181 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
(h) Represents net gains(losses) on uranium derivative contracts at Ameren Missouri. These contracts are a partial hedge of our uranium requirements through December 2013 as of December 31, 2011. Current losses deferred as regulatory assets include less than $1 million and less than $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $2 million at Ameren and $2 million at Ameren Missouri as of December 31, 2010.

Derivative instruments are subject to various credit-related losses in the event of nonperformance by counterparties to the transaction. Exchange-traded contracts are supported by the financial and credit quality of the clearing members of the respective exchanges and have nominal credit risk. In all other transactions, we are exposed to credit risk. Our credit risk management program involves establishing credit limits and collateral requirements for counterparties, using master trading and netting agreements, and reporting daily exposure to senior management.

 

We believe that entering into master trading and netting agreements mitigates the level of financial loss that could result from default by allowing net settlement of derivative assets and liabilities. We generally enter into the following master trading and netting agreements: (1) the International Swaps and Derivatives Association Agreement, a standardized financial natural gas and electric contract; (2) the Master Power Purchase and Sale Agreement, created by the Edison Electric Institute and the National Energy Marketers Association, a standardized contract for the purchase and sale of wholesale power; and (3) the North American Energy Standards Board Inc. agreement, a standardized contract for the purchase and sale of natural gas. These master trading and netting agreements allow the counterparties to net settle sale and purchase transactions. Further, collateral requirements are calculated at a master trading and netting agreement level by counterparty.

Concentrations of Credit Risk

In determining our concentrations of credit risk related to derivative instruments, we review our individual counterparties and categorize each counterparty into one of eight groupings according to the primary business in which each engages. The following table presents the maximum exposure, as of December 31, 2011, and 2010, if counterparty groups were to fail completely to perform on contracts by grouping. The maximum exposure is based on the gross fair value of financial instruments, including NPNS contracts, which excludes collateral held, and does not consider the legally binding right to net transactions based on master trading and netting agreements.

 

      Affiliates(a)     

Coal

Producers

    

Commodity

Marketing

Companies

    

Electric

Utilities

    

Financial

Companies

    

Municipalities/

Cooperatives

     Oil and Gas
Companies
    

Retail

Companies

     Total  

2011:

                          

AMO

   $ 1       $ 35       $ 1       $ 4       $ 26       $ 4       $ -       $ -       $ 71   

AIC

     -         -         84         -         1         -         -         -         85   

Genco

     -         1         1         2         6         -         3         -         13   

Other(b)

     275         1         3         10         51         194         -         87         621   

Ameren

   $         276       $             37       $             89       $             16       $             84       $             198       $             3       $             87       $         790   

2010:

                          

AMO

   $ -       $ 21       $ 1       $ 2       $ 5       $ 11       $ 1       $ -       $ 41   

AIC

     -         -         3         -         1         -         -         -         4   

Genco

     -         6         2         1         1         -         6         -         16   

Other(b)

     410         3         10         19         65         539         3         72         1,121   

Ameren

   $ 410       $ 30       $ 16       $ 22       $ 72       $ 550       $ 10       $ 72       $ 1,182   

 

(a) Primarily composed of Marketing Company's exposure to Ameren Illinois related to financial contracts. The exposure is not eliminated at the consolidated Ameren level for purposes of this disclosure, as it is calculated without regard to the offsetting affiliate counterparty's liability position. See Note 14 – Related Party Transactions for additional information on these financial contracts.
(b) Includes amounts for Marketing Company, AERG, and AFS.

The potential loss on counterparty exposures is reduced by the application of master trading and netting agreements and collateral held to the extent of reducing the exposure to zero. Collateral includes both cash collateral and other collateral held. The amount of cash collateral held by Marketing Company from counterparties and based on the contractual rights under the agreements to seek collateral and the maximum exposure as calculated under the individual master trading and netting agreements was less than $1 million and $1 million from retail companies at December 31, 2011 and 2010, respectively. There was no cash collateral held at Ameren registrant subsidiaries. As of December 31, 2011, other collateral used to reduce exposure consisted of letters of credit in the amount of $9 million, $1 million, $1 million, and $7 million held by Ameren, Ameren Missouri, Genco, and Marketing Company, respectively. As of December 31, 2010, other collateral used to reduce exposure consisted of letters of credit in the amount of $28 million and $1 million held by Ameren and Ameren Illinois, respectively. The following table presents the potential loss after consideration of the application of master trading and netting agreements and collateral held as of December 31, 2011 and 2010:

 

      Affiliates(a)     

Coal

Producers

    

Commodity
Marketing

Companies

    

Electric

Utilities

    

Financial

Companies

    

Municipalities/

Cooperatives

     Oil and Gas
Companies
    

Retail

Companies

     Total  

2011:

                          

AMO

   $ 1       $ 35       $ 1       $ 3       $ 22       $ 4       $ -       $ -       $ 66   

AIC

     -         -         84         -         -         -         -         -         84   

Genco

     -         -         -         1         1         -         2         -         4   

Other(b)

     273         -         3         5         42         187         -         86         596   

Ameren

   $         274       $         35       $         88       $         9       $         65       $         191       $         2       $         86       $         750   

2010:

                          

AMO

   $ -       $ 8       $ -       $ 1       $ 2       $ 10       $ -       $ -       $ 21   

AIC

     -         -         2         -         -         -         -         -         2   

Genco

     -         1         1         1         1         -         5         -         9   

Other(b)

     404         1         8         7         56         513         2         71         1,062   

Ameren

   $         404       $         10       $         11       $         9       $         59       $         523       $         7       $         71       $       1,094   

 

(a) Primarily comprised of Marketing Company's exposure to Ameren Illinois related to financial contracts. The exposure is not eliminated at the consolidated Ameren level for purposes of this disclosure, as it is calculated without regard to the offsetting affiliate counterparty's liability position. See Note 14 – Related Party Transactions for additional information on these financial contracts.
(b) Includes amounts for Marketing Company, AERG, and AFS.

Derivative Instruments with Credit Risk-Related Contingent Features

Our commodity contracts contain collateral provisions tied to the Ameren Companies' credit ratings. If we were to experience an adverse change in our credit ratings, or if a counterparty with reasonable grounds for uncertainty regarding performance of an obligation requested adequate assurance of performance, additional collateral postings might be required. The following table presents, as of December 31, 2011, and 2010, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a gross liability position, the cash collateral posted, and the aggregate amount of additional collateral that could be required to be posted with counterparties. The additional collateral required is the net liability position allowed under the master trading and netting agreements assuming (1) the credit risk-related contingent features underlying these agreements were triggered on December 31, 2011, or 2010, respectively, and (2) those counterparties with rights to do so requested collateral:

 

     

Aggregate Fair Value of

Derivative Liabilities(a)

    

Cash

Collateral Posted

     Potential Aggregate Amount of
Additional Collateral Required(b)
 

2011:

        

Ameren Missouri

   $         102       $ 8       $ 86   

Ameren Illinois

     220                 96                 125   

Genco

     55         1         58   

Other(c)

     79         11         63   

Ameren

   $ 456       $ 116       $ 332   

2010:

        

Ameren Missouri

   $ 105       $ 7       $ 93   

Ameren Illinois

     233         109         111   

Genco

     31         -         28   

Other(c)

     62         18         42   

Ameren

   $ 431       $ 134       $ 274   

 

(a) Prior to consideration of master trading and netting agreements and including NPNS contract exposures.
(b) As collateral requirements with certain counterparties are based on master trading and netting agreements, the aggregate amount of additional collateral required to be posted is determined after consideration of the effects of such agreements.
(c) Includes amounts for Marketing Company and Ameren (parent).

 

Cash Flow Hedges

The following table presents the pretax net gain or loss for the year ended December 31, 2011 and 2010, associated with derivative instruments designated as cash flow hedges:

 

    

Gain (Loss)

Recognized in OCI(a)

   

Location of (Gain) Loss

Reclassified from

Accumulated OCI into

Income(b)

 

(Gain) Loss

Reclassified from

Accumulated OCI

into Income(b)

    Location of Gain (Loss)
Recognized in Income(c)
 

Gain (Loss)
Recognized

in Income(c)

 

2011:                        

         

Ameren:(d)

         

Power

  $ 6      Operating Revenues - Electric   $         5      Operating Revenues - Electric   $ (10

Interest rate(e)

    -      Interest Charges     (f   Interest Charges               -   

Genco:

         

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

2010:

         

Ameren:(d)

         

Power

  $ (2   Operating Revenues - Electric   $ (14   Operating Revenues - Electric   $ (3

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

Genco:

         

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

 

(a) Effective portion of gain (loss).
(b) Effective portion of (gain) loss on settlements.
(c) Ineffective portion of gain (loss) and amount excluded from effectiveness testing.
(d) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(e) Represents interest rate swaps settled in prior periods. The cumulative gain and loss on the interest rate swaps is being amortized into income over a 10-year period.
(f) Less than $1 million.

Other Derivatives

The following table represents the net change in market value associated with derivatives not designated as hedging instruments for the years ended December 31, 2011 and 2010:

 

     

Location of Gain (Loss)

Recognized in Income

  

Gain (Loss) Recognized

in Income

 
      2011     2010  

Ameren(a)

   Fuel oils    Operating Expenses - Fuel    $ (1   $ 9   
   Natural gas (generation)    Operating Expenses - Fuel      2        -   
     Power    Operating Revenues - Electric      (2     9   
          Total    $ (1   $ 18   

Ameren Missouri

   Natural gas (generation)    Operating Expenses - Fuel    $ (1   $ 1   

Genco

   Fuel oils    Operating Expenses - Fuel    $ (1   $ 7   
   Natural gas (generation)    Operating Expenses - Fuel      2        -   
     Power    Operating Revenues      (3     1   
          Total    $ (2   $ 8   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

 

Derivatives Subject to Regulatory Deferral

The following table represents the net change in market value associated with derivatives that qualify for regulatory deferral for the years ended December 31, 2011 and 2010:

 

     

Gain (Loss) Recognized

In Regulatory Liabilities

or Regulatory Assets

 
   2011      2010  

Ameren(a)

   Fuel oils    $ -       $ 14   
   Natural gas      (26      (91
   Power      80         12   
     Uranium      (3      4   
     Total    $ 51       $ (61

Ameren

   Fuel oils    $ -       $ 14   

Missouri

   Natural gas      -         (11
   Power      18         4   
     Uranium      (3      4   
     Total    $ 15       $ 11   

Ameren

   Natural gas    $ (26    $ (80

Illinois

   Power      212         70   
     Total    $ 186       $ (10

 

(a) Includes amounts for intercompany eliminations.

As part of the 2007 Illinois Electric Settlement Agreement and subsequent Illinois power procurement processes, Ameren Illinois entered into financial contracts with Marketing Company. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives that qualify for regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities by Ameren Illinois and OCI by Marketing Company. In Ameren's consolidated financial statements, all financial statement effects of the derivative instruments entered into among affiliates were eliminated. See Note 14 – Related Party Transactions for additional information on these financial contracts. The following table presents the fair value of the financial contracts included on Ameren Illinois' balance sheet at December 31, 2011 and 2010:

 

            2011      2010  

Ameren Illinois

   MTM derivative liabilities - affiliates    $ 200       $ 172   
     Other deferred credits and liabilities      -         178   
     Total    $ 200       $ 350

NOTE 7 – DERIVATIVE FINANCIAL INSTRUMENTS

We use derivatives principally to manage the risk of changes in market prices for natural gas, coal, diesel, power, and uranium. Such price fluctuations may cause the following:

 

Ÿ  

an unrealized appreciation or depreciation of our contracted commitments to purchase or sell when purchase or sale prices under the commitments are compared with current commodity prices;

Ÿ  

market values of coal, natural gas, and uranium inventories that differ from the cost of those commodities in inventory; and

Ÿ  

actual cash outlays for the purchase of these commodities that differ from anticipated cash outlays.

The derivatives that we use to hedge these risks are governed by our risk management policies for forward contracts, futures, options, and swaps. Our net positions are continually assessed within our structured hedging programs to determine whether new or offsetting transactions are required. The goal of the hedging program is generally to mitigate financial risks while ensuring that sufficient volumes are available to meet our requirements. Contracts we enter into as part of our risk management program may be settled financially, settled by physical delivery, or net settled with the counterparty.

 

The following table presents open gross derivative volumes by commodity type as of December 31, 2011 and 2010:

 

      Quantity (in millions, except as indicated)  
Commodity   

NPNS

Contracts(a)

    Cash Flow
Hedges(b)
   

Other

Derivatives(c)

    Derivatives That Qualify for
Regulatory Deferral(d)
 
     2011     2010     2011     2010     2011     2010     2011     2010  

Coal (in tons)

                

Ameren Missouri

     116        46        (e     (e     (e     (e     (e     (e

Genco

     24        21        (e     (e     (e     (e     (e     (e

Other(f)

     7        6        (e     (e     (e     (e     (e     (e

Ameren

     147        73        (e     (e     (e     (e     (e     (e

Fuel oils (in gallons)(g)

                

Ameren Missouri

     (e     (e     (e     (e     (e     (e     53        80   

Genco

     (e     (e     (e     (e     27        43        (e     (e

Other(f)

     (e     (e     (e     (e     9        12        (e     (e

Ameren

     (e     (e     (e     (e     36        55        53        80   

Natural gas (in mmbtu)

                

Ameren Missouri

     8        13        (e     (e     9        2        19        21   

Ameren Illinois

     42        85        (e     (e     (e     (e     174        173   

Genco

     (e     (e     (e     (e     7        3        (e     (e

Other(f)

     (e     (e     (e     (e     1        16        (e     (e

Ameren

     50        98        (e     (e     17        21        193        194   

Power (in megawatthours)

                

Ameren Missouri

     1        2        (e     (e     1        1        6        5   

Ameren Illinois

     11        (e     (e     (e     (e     (e     24        26   

Genco

     (e     (e     (e     (e     -        3        (e     (e

Other(f)

     61        61        17        2        30        57        (9     (13

Ameren

     73        63        17        2        31        61        21        18   

Uranium (pounds in thousands)

                

Ameren Missouri & Ameren

     5,553        5,810        (e     (e     (e     (e     148        185   

 

(a) Contracts through December 2017, March 2015, September 2035, and October 2024 for coal, natural gas, power, and uranium, respectively, as of December 31, 2011.
(b) Contracts through December 2014 for power as of December 31, 2011.
(c) Contracts through October 2014, December 2012, and December 2015 for fuel oils, natural gas, and power, respectively, as of December 31, 2011.
(d) Contracts through October 2014, October 2016, May 2032, and December 2013 for fuel oils, natural gas, power, and uranium, respectively, as of December 31, 2011.
(e) Not applicable.
(f) Includes AERG contracts for coal and fuel oils, Marketing Company contracts for natural gas and power, and intercompany eliminations for power.
(g) Fuel oils consist of heating and crude oil.

 

Authoritative accounting guidance regarding derivative instruments requires that all contracts considered to be derivative instruments be recorded on the balance sheet at their fair values, unless the NPNS exception applies. See Note 8 – Fair Value Measurements for discussion of our methods of assessing the fair value of derivative instruments. Many of our physical contracts, such as our coal and purchased power contracts, qualify for the NPNS exception to derivative accounting rules. The revenue or expense recorded in connection with NPNS contracts is recognized at the contract price upon physical delivery.

If we determine that a contract meets the definition of a derivative and is not eligible for the NPNS exception, we review the contract to determine if it qualifies for hedge accounting treatment. We also consider whether gains or losses resulting from such derivatives qualify for regulatory deferral. Contracts that qualify for cash flow hedge accounting treatment are recorded at fair value with changes in fair value charged or credited to accumulated OCI in the period in which the change occurs, to the extent the hedge is effective. To the extent the hedge is ineffective, the related changes in fair value are charged or credited to the statement of income in the period in which the change occurs. When the contract is settled or delivered, the net gain or loss is recorded in the statement of income.

Derivative contracts that qualify for regulatory deferral are recorded at fair value, with changes in fair value recorded as regulatory assets or regulatory liabilities in the period in which the change occurs. Ameren Missouri and Ameren Illinois believe derivative gains and losses deferred as regulatory assets and regulatory liabilities are probable of recovery or refund through future rates charged to customers. Regulatory assets and regulatory liabilities are amortized to operating income as related losses and gains are reflected in rates charged to customers. Therefore, gains and losses on these derivatives have no effect on operating income.

Certain derivative contracts are entered into on a regular basis as part of our risk management program but do not qualify for the NPNS exception, hedge accounting, or regulatory deferral accounting. Such contracts are recorded at fair value, with changes in fair value charged or credited to the statement of income in the period in which the change occurs.

Authoritative accounting guidance permits companies to offset fair value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a liability) against fair value amounts recognized for derivative instruments that are executed with the same counterparty under the same master netting arrangement. The Ameren Companies did not elect to adopt this guidance for any eligible financial instruments or other items.

 

The following table presents the carrying value and balance sheet location of all derivative instruments as of December 31, 2011 and 2010:

 

      Balance Sheet Location      Ameren(a)        Ameren
Missouri
     Ameren
Illinois
     Genco  

2011:

                  

Derivative assets designated as hedging instruments

               

Commodity contracts:            

                  

Power

   MTM derivative assets      $ 8         $ (b    $ (b    $ -   
     Other assets        16           -         -         -   
     Total assets      $ 24         $ -       $ -       $ -   

Derivative liabilities designated as hedging instruments

               

Commodity contracts:

                  

Power

   Other deferred credits and liabilities      $ 1         $ -       $ -       $ -   
     Total liabilities      $ 1         $ -       $ -       $ -   

Derivative assets not designated as hedging instruments(c)

               

Commodity contracts:

                  

Fuel oils

   MTM derivative assets      $ 29         $ (b    $ (b    $ 10   
   Other current assets        -           17         -         -   
   Other assets        8           6         -         1   

Natural gas

   MTM derivative assets        6           (b      (b      2   
   Other current assets        -           2         1         -   
   Other assets        -           -         1         -   

Power

   MTM derivative assets        72           (b      (b      -   
   Other current assets        -           30         -         -   
     Other assets        99           -         77         -   
     Total assets      $         214         $         55       $         79       $         13   

Derivative liabilities not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative liabilities      $ 2       $ (b    $ -       $ 1   
   Other current liabilities        -         1         -         -   

Natural gas

   MTM derivative liabilities        106         (b      90         2   
   Other current liabilities        -         13         -         -   
   Other deferred credits and liabilities        92         13         79         -   

Power

   MTM derivative liabilities        53         (b      9         -   
   MTM derivative liabilities - affiliates        (b      (b      200         -   
   Other current liabilities        -         9         -         -   
   Other deferred credits and liabilities        26         -         8         -   

Uranium

   Other deferred credits and liabilities        1         1         -         -   
     Total liabilities      $ 280       $ 37       $ 386       $ 3   

2010:

                

Derivative assets designated as hedging instruments

             

Commodity contracts:

                

Power

   MTM derivative assets      $ 3       $ (b    $ (b    $ -   
     Other assets        2         -         -         -   
     Total assets      $ 5       $ -       $ -       $ -   

Derivative liabilities designated as hedging instruments

             

Commodity contracts:

                

Power

   MTM derivative liabilities      $ 1       $ (b    $ -       $ -   
     Total liabilities      $ 1       $ -       $ -       $ -   

Derivative assets not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative assets      $ 42       $ (b    $ (b    $ 14   
   Other current assets        -         24         -         -   
   Other assets        22         13         -         7   

Natural gas

   MTM derivative assets        4         (b      (b      1   
   Other current assets        -         1         1         -   
   Other assets        1         -         1         -   

Power

   MTM derivative assets        78         (b      (b      11   
   Other current assets        -         8         2         -   
   Other assets        20         -         6         -   

Uranium

   MTM derivative assets        2         (b      (b      -   
     Other current assets        -         2         -         -   
     Total assets      $ 169       $ 48       $ 10       $ 33   

Derivative liabilities not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative liabilities      $ 12       $ (b    $ -       $ 4   
   Other current liabilities        -         7         -         -   
   Other deferred credits and liabilities        1         -         -         -   

Natural gas

   MTM derivative liabilities        87         (b      73         2   
   Other current liabilities        -         11         -         -   
   Other deferred credits and liabilities        84         13         70         -   

Power

   MTM derivative liabilities        61         (b      9         3   
   MTM derivative liabilities - affiliates        (b      (b      172         5   
   Other current liabilities        -         6         -         -   
     Other deferred credits and liabilities        7         -         179         -   
     Total liabilities      $         252       $         37       $         503       $         14   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Balance sheet line item not applicable to registrant.
(c) Includes derivatives subject to regulatory deferral.

 

The following table presents the cumulative amount of pretax net gains (losses) on all derivative instruments in accumulated OCI and regulatory assets or regulatory liabilities as of December 31, 2011 and 2010:

 

        Ameren      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(a)  

2011:

                

Cumulative gains (losses) deferred in accumulated OCI:

                

Power derivative contracts(b)

     $ 19       $ -       $ -       $ -       $ 19   

Interest rate derivative contracts(c)(d)

       (8      -         -         (8      -   

Cumulative gains (losses) deferred in regulatory liabilities or assets:

                

Fuel oils derivative contracts(e)

       19         19         -         -         -   

Natural gas derivative contracts(f)

       (191      (24      (167      -         -   

Power derivative contracts(g)

       81         21         (140      -         200   

Uranium derivative contracts(h)

       (1      (1      -         -         -   

2010:

                

Cumulative gains (losses) deferred in accumulated OCI:

                

Power derivative contracts(b)

     $ 8       $ -       $ -       $ -       $ 8   

Interest rate derivative contracts(c)(d)

       (9      -         -         (9      -   

Cumulative gains (losses) deferred in regulatory liabilities or assets:

                

Fuel oils derivative contracts(e)

       19         19         -         -         -   

Natural gas derivative contracts(f)

       (165      (24      (141      -         -   

Power derivative contracts(g)

       1         3         (352      -         350   

Uranium derivative contracts(h)

       2         2         -         -         -   

 

(a) Includes amounts for Marketing Company and intercompany eliminations.
(b) Represents net gains associated with power derivative contracts at Ameren. These contracts are a partial hedge of electricity price exposure through December 2014 as of December 31, 2011. Current gains of $5 million and $8 million were recorded at Ameren as of December 31, 2011, and December 31, 2010, respectively.
(c) Includes net gains associated with interest rate swaps at Genco that were a partial hedge of the interest rate on debt issued in June 2002. The swaps cover the first 10 years of debt that has a 30-year maturity, and the gain in OCI is amortized over a 10-year period that began in June 2002. The carrying value at December 31, 2011, and December 31, 2010 was less than $1 million and less than $1 million, respectively. The balance of the gain will be amortized by June 2012.
(d) Includes net losses associated with interest rate swaps at Genco. The swaps were executed during the fourth quarter of 2007 as a partial hedge of interest rate risks associated with Genco's April 2008 debt issuance. The loss on the interest rate swaps is being amortized over a 10-year period that began in April 2008. The carrying value at December 31, 2011, and December 31, 2010, was a loss of $9 million and a loss of $10 million, respectively. Over the next 12 months, $1.4 million of the loss will be amortized.
(e) Represents net gains on fuel oils derivative contracts at Ameren Missouri. These contracts are a partial hedge of Ameren Missouri's transportation costs for coal through October 2014 as of December 31, 2011. Current gains deferred as regulatory liabilities include $16 million and $16 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current losses deferred as regulatory assets include $1 million and $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $13 million and $13 million at Ameren and Ameren Missouri as of December 31, 2010, respectively. Current losses deferred as regulatory assets include $6 million and $6 million at Ameren and Ameren Missouri as of December 31, 2010, respectively.
(f) Represents net losses associated with natural gas derivative contracts. These contracts are a partial hedge of natural gas requirements through October 2016 at Ameren, Ameren Missouri, and Ameren Illinois in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $1 million and $1 million at Ameren and Ameren Illinois, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $101 million, $11 million, and $90 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $2 million, $1 million, and $1 million at Ameren, Ameren Missouri, and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $84 million, $11 million, and $73 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
(g) Represents net losses associated with power derivative contracts. These contracts are a partial hedge of power price requirements through May 2032 at Ameren and Ameren Illinois and through December 2015 at Ameren Missouri, in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $29 million and $29 million at Ameren and Ameren Missouri, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $17 million, $8 million, and $209 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $8 million, $6 million, and $2 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $13 million, $3 million, and $181 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
(h) Represents net gains(losses) on uranium derivative contracts at Ameren Missouri. These contracts are a partial hedge of our uranium requirements through December 2013 as of December 31, 2011. Current losses deferred as regulatory assets include less than $1 million and less than $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $2 million at Ameren and $2 million at Ameren Missouri as of December 31, 2010.

Derivative instruments are subject to various credit-related losses in the event of nonperformance by counterparties to the transaction. Exchange-traded contracts are supported by the financial and credit quality of the clearing members of the respective exchanges and have nominal credit risk. In all other transactions, we are exposed to credit risk. Our credit risk management program involves establishing credit limits and collateral requirements for counterparties, using master trading and netting agreements, and reporting daily exposure to senior management.

 

We believe that entering into master trading and netting agreements mitigates the level of financial loss that could result from default by allowing net settlement of derivative assets and liabilities. We generally enter into the following master trading and netting agreements: (1) the International Swaps and Derivatives Association Agreement, a standardized financial natural gas and electric contract; (2) the Master Power Purchase and Sale Agreement, created by the Edison Electric Institute and the National Energy Marketers Association, a standardized contract for the purchase and sale of wholesale power; and (3) the North American Energy Standards Board Inc. agreement, a standardized contract for the purchase and sale of natural gas. These master trading and netting agreements allow the counterparties to net settle sale and purchase transactions. Further, collateral requirements are calculated at a master trading and netting agreement level by counterparty.

Concentrations of Credit Risk

In determining our concentrations of credit risk related to derivative instruments, we review our individual counterparties and categorize each counterparty into one of eight groupings according to the primary business in which each engages. The following table presents the maximum exposure, as of December 31, 2011, and 2010, if counterparty groups were to fail completely to perform on contracts by grouping. The maximum exposure is based on the gross fair value of financial instruments, including NPNS contracts, which excludes collateral held, and does not consider the legally binding right to net transactions based on master trading and netting agreements.

 

      Affiliates(a)     

Coal

Producers

    

Commodity

Marketing

Companies

    

Electric

Utilities

    

Financial

Companies

    

Municipalities/

Cooperatives

     Oil and Gas
Companies
    

Retail

Companies

     Total  

2011:

                          

AMO

   $ 1       $ 35       $ 1       $ 4       $ 26       $ 4       $ -       $ -       $ 71   

AIC

     -         -         84         -         1         -         -         -         85   

Genco

     -         1         1         2         6         -         3         -         13   

Other(b)

     275         1         3         10         51         194         -         87         621   

Ameren

   $         276       $             37       $             89       $             16       $             84       $             198       $             3       $             87       $         790   

2010:

                          

AMO

   $ -       $ 21       $ 1       $ 2       $ 5       $ 11       $ 1       $ -       $ 41   

AIC

     -         -         3         -         1         -         -         -         4   

Genco

     -         6         2         1         1         -         6         -         16   

Other(b)

     410         3         10         19         65         539         3         72         1,121   

Ameren

   $ 410       $ 30       $ 16       $ 22       $ 72       $ 550       $ 10       $ 72       $ 1,182   

 

(a) Primarily composed of Marketing Company's exposure to Ameren Illinois related to financial contracts. The exposure is not eliminated at the consolidated Ameren level for purposes of this disclosure, as it is calculated without regard to the offsetting affiliate counterparty's liability position. See Note 14 – Related Party Transactions for additional information on these financial contracts.
(b) Includes amounts for Marketing Company, AERG, and AFS.

The potential loss on counterparty exposures is reduced by the application of master trading and netting agreements and collateral held to the extent of reducing the exposure to zero. Collateral includes both cash collateral and other collateral held. The amount of cash collateral held by Marketing Company from counterparties and based on the contractual rights under the agreements to seek collateral and the maximum exposure as calculated under the individual master trading and netting agreements was less than $1 million and $1 million from retail companies at December 31, 2011 and 2010, respectively. There was no cash collateral held at Ameren registrant subsidiaries. As of December 31, 2011, other collateral used to reduce exposure consisted of letters of credit in the amount of $9 million, $1 million, $1 million, and $7 million held by Ameren, Ameren Missouri, Genco, and Marketing Company, respectively. As of December 31, 2010, other collateral used to reduce exposure consisted of letters of credit in the amount of $28 million and $1 million held by Ameren and Ameren Illinois, respectively. The following table presents the potential loss after consideration of the application of master trading and netting agreements and collateral held as of December 31, 2011 and 2010:

 

      Affiliates(a)     

Coal

Producers

    

Commodity
Marketing

Companies

    

Electric

Utilities

    

Financial

Companies

    

Municipalities/

Cooperatives

     Oil and Gas
Companies
    

Retail

Companies

     Total  

2011:

                          

AMO

   $ 1       $ 35       $ 1       $ 3       $ 22       $ 4       $ -       $ -       $ 66   

AIC

     -         -         84         -         -         -         -         -         84   

Genco

     -         -         -         1         1         -         2         -         4   

Other(b)

     273         -         3         5         42         187         -         86         596   

Ameren

   $         274       $         35       $         88       $         9       $         65       $         191       $         2       $         86       $         750   

2010:

                          

AMO

   $ -       $ 8       $ -       $ 1       $ 2       $ 10       $ -       $ -       $ 21   

AIC

     -         -         2         -         -         -         -         -         2   

Genco

     -         1         1         1         1         -         5         -         9   

Other(b)

     404         1         8         7         56         513         2         71         1,062   

Ameren

   $         404       $         10       $         11       $         9       $         59       $         523       $         7       $         71       $       1,094   

 

(a) Primarily comprised of Marketing Company's exposure to Ameren Illinois related to financial contracts. The exposure is not eliminated at the consolidated Ameren level for purposes of this disclosure, as it is calculated without regard to the offsetting affiliate counterparty's liability position. See Note 14 – Related Party Transactions for additional information on these financial contracts.
(b) Includes amounts for Marketing Company, AERG, and AFS.

Derivative Instruments with Credit Risk-Related Contingent Features

Our commodity contracts contain collateral provisions tied to the Ameren Companies' credit ratings. If we were to experience an adverse change in our credit ratings, or if a counterparty with reasonable grounds for uncertainty regarding performance of an obligation requested adequate assurance of performance, additional collateral postings might be required. The following table presents, as of December 31, 2011, and 2010, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a gross liability position, the cash collateral posted, and the aggregate amount of additional collateral that could be required to be posted with counterparties. The additional collateral required is the net liability position allowed under the master trading and netting agreements assuming (1) the credit risk-related contingent features underlying these agreements were triggered on December 31, 2011, or 2010, respectively, and (2) those counterparties with rights to do so requested collateral:

 

     

Aggregate Fair Value of

Derivative Liabilities(a)

    

Cash

Collateral Posted

     Potential Aggregate Amount of
Additional Collateral Required(b)
 

2011:

        

Ameren Missouri

   $         102       $ 8       $ 86   

Ameren Illinois

     220                 96                 125   

Genco

     55         1         58   

Other(c)

     79         11         63   

Ameren

   $ 456       $ 116       $ 332   

2010:

        

Ameren Missouri

   $ 105       $ 7       $ 93   

Ameren Illinois

     233         109         111   

Genco

     31         -         28   

Other(c)

     62         18         42   

Ameren

   $ 431       $ 134       $ 274   

 

(a) Prior to consideration of master trading and netting agreements and including NPNS contract exposures.
(b) As collateral requirements with certain counterparties are based on master trading and netting agreements, the aggregate amount of additional collateral required to be posted is determined after consideration of the effects of such agreements.
(c) Includes amounts for Marketing Company and Ameren (parent).

 

Cash Flow Hedges

The following table presents the pretax net gain or loss for the year ended December 31, 2011 and 2010, associated with derivative instruments designated as cash flow hedges:

 

    

Gain (Loss)

Recognized in OCI(a)

   

Location of (Gain) Loss

Reclassified from

Accumulated OCI into

Income(b)

 

(Gain) Loss

Reclassified from

Accumulated OCI

into Income(b)

    Location of Gain (Loss)
Recognized in Income(c)
 

Gain (Loss)
Recognized

in Income(c)

 

2011:                        

         

Ameren:(d)

         

Power

  $ 6      Operating Revenues - Electric   $         5      Operating Revenues - Electric   $ (10

Interest rate(e)

    -      Interest Charges     (f   Interest Charges               -   

Genco:

         

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

2010:

         

Ameren:(d)

         

Power

  $ (2   Operating Revenues - Electric   $ (14   Operating Revenues - Electric   $ (3

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

Genco:

         

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

 

(a) Effective portion of gain (loss).
(b) Effective portion of (gain) loss on settlements.
(c) Ineffective portion of gain (loss) and amount excluded from effectiveness testing.
(d) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(e) Represents interest rate swaps settled in prior periods. The cumulative gain and loss on the interest rate swaps is being amortized into income over a 10-year period.
(f) Less than $1 million.

Other Derivatives

The following table represents the net change in market value associated with derivatives not designated as hedging instruments for the years ended December 31, 2011 and 2010:

 

     

Location of Gain (Loss)

Recognized in Income

  

Gain (Loss) Recognized

in Income

 
      2011     2010  

Ameren(a)

   Fuel oils    Operating Expenses - Fuel    $ (1   $ 9   
   Natural gas (generation)    Operating Expenses - Fuel      2        -   
     Power    Operating Revenues - Electric      (2     9   
          Total    $ (1   $ 18   

Ameren Missouri

   Natural gas (generation)    Operating Expenses - Fuel    $ (1   $ 1   

Genco

   Fuel oils    Operating Expenses - Fuel    $ (1   $ 7   
   Natural gas (generation)    Operating Expenses - Fuel      2        -   
     Power    Operating Revenues      (3     1   
          Total    $ (2   $ 8   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

 

Derivatives Subject to Regulatory Deferral

The following table represents the net change in market value associated with derivatives that qualify for regulatory deferral for the years ended December 31, 2011 and 2010:

 

     

Gain (Loss) Recognized

In Regulatory Liabilities

or Regulatory Assets

 
   2011      2010  

Ameren(a)

   Fuel oils    $ -       $ 14   
   Natural gas      (26      (91
   Power      80         12   
     Uranium      (3      4   
     Total    $ 51       $ (61

Ameren

   Fuel oils    $ -       $ 14   

Missouri

   Natural gas      -         (11
   Power      18         4   
     Uranium      (3      4   
     Total    $ 15       $ 11   

Ameren

   Natural gas    $ (26    $ (80

Illinois

   Power      212         70   
     Total    $ 186       $ (10

 

(a) Includes amounts for intercompany eliminations.

As part of the 2007 Illinois Electric Settlement Agreement and subsequent Illinois power procurement processes, Ameren Illinois entered into financial contracts with Marketing Company. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives that qualify for regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities by Ameren Illinois and OCI by Marketing Company. In Ameren's consolidated financial statements, all financial statement effects of the derivative instruments entered into among affiliates were eliminated. See Note 14 – Related Party Transactions for additional information on these financial contracts. The following table presents the fair value of the financial contracts included on Ameren Illinois' balance sheet at December 31, 2011 and 2010:

 

            2011      2010  

Ameren Illinois

   MTM derivative liabilities - affiliates    $ 200       $ 172   
     Other deferred credits and liabilities      -         178   
     Total    $ 200       $ 350

NOTE 7 – DERIVATIVE FINANCIAL INSTRUMENTS

We use derivatives principally to manage the risk of changes in market prices for natural gas, coal, diesel, power, and uranium. Such price fluctuations may cause the following:

 

Ÿ  

an unrealized appreciation or depreciation of our contracted commitments to purchase or sell when purchase or sale prices under the commitments are compared with current commodity prices;

Ÿ  

market values of coal, natural gas, and uranium inventories that differ from the cost of those commodities in inventory; and

Ÿ  

actual cash outlays for the purchase of these commodities that differ from anticipated cash outlays.

The derivatives that we use to hedge these risks are governed by our risk management policies for forward contracts, futures, options, and swaps. Our net positions are continually assessed within our structured hedging programs to determine whether new or offsetting transactions are required. The goal of the hedging program is generally to mitigate financial risks while ensuring that sufficient volumes are available to meet our requirements. Contracts we enter into as part of our risk management program may be settled financially, settled by physical delivery, or net settled with the counterparty.

 

The following table presents open gross derivative volumes by commodity type as of December 31, 2011 and 2010:

 

      Quantity (in millions, except as indicated)  
Commodity   

NPNS

Contracts(a)

    Cash Flow
Hedges(b)
   

Other

Derivatives(c)

    Derivatives That Qualify for
Regulatory Deferral(d)
 
     2011     2010     2011     2010     2011     2010     2011     2010  

Coal (in tons)

                

Ameren Missouri

     116        46        (e     (e     (e     (e     (e     (e

Genco

     24        21        (e     (e     (e     (e     (e     (e

Other(f)

     7        6        (e     (e     (e     (e     (e     (e

Ameren

     147        73        (e     (e     (e     (e     (e     (e

Fuel oils (in gallons)(g)

                

Ameren Missouri

     (e     (e     (e     (e     (e     (e     53        80   

Genco

     (e     (e     (e     (e     27        43        (e     (e

Other(f)

     (e     (e     (e     (e     9        12        (e     (e

Ameren

     (e     (e     (e     (e     36        55        53        80   

Natural gas (in mmbtu)

                

Ameren Missouri

     8        13        (e     (e     9        2        19        21   

Ameren Illinois

     42        85        (e     (e     (e     (e     174        173   

Genco

     (e     (e     (e     (e     7        3        (e     (e

Other(f)

     (e     (e     (e     (e     1        16        (e     (e

Ameren

     50        98        (e     (e     17        21        193        194   

Power (in megawatthours)

                

Ameren Missouri

     1        2        (e     (e     1        1        6        5   

Ameren Illinois

     11        (e     (e     (e     (e     (e     24        26   

Genco

     (e     (e     (e     (e     -        3        (e     (e

Other(f)

     61        61        17        2        30        57        (9     (13

Ameren

     73        63        17        2        31        61        21        18   

Uranium (pounds in thousands)

                

Ameren Missouri & Ameren

     5,553        5,810        (e     (e     (e     (e     148        185   

 

(a) Contracts through December 2017, March 2015, September 2035, and October 2024 for coal, natural gas, power, and uranium, respectively, as of December 31, 2011.
(b) Contracts through December 2014 for power as of December 31, 2011.
(c) Contracts through October 2014, December 2012, and December 2015 for fuel oils, natural gas, and power, respectively, as of December 31, 2011.
(d) Contracts through October 2014, October 2016, May 2032, and December 2013 for fuel oils, natural gas, power, and uranium, respectively, as of December 31, 2011.
(e) Not applicable.
(f) Includes AERG contracts for coal and fuel oils, Marketing Company contracts for natural gas and power, and intercompany eliminations for power.
(g) Fuel oils consist of heating and crude oil.

 

Authoritative accounting guidance regarding derivative instruments requires that all contracts considered to be derivative instruments be recorded on the balance sheet at their fair values, unless the NPNS exception applies. See Note 8 – Fair Value Measurements for discussion of our methods of assessing the fair value of derivative instruments. Many of our physical contracts, such as our coal and purchased power contracts, qualify for the NPNS exception to derivative accounting rules. The revenue or expense recorded in connection with NPNS contracts is recognized at the contract price upon physical delivery.

If we determine that a contract meets the definition of a derivative and is not eligible for the NPNS exception, we review the contract to determine if it qualifies for hedge accounting treatment. We also consider whether gains or losses resulting from such derivatives qualify for regulatory deferral. Contracts that qualify for cash flow hedge accounting treatment are recorded at fair value with changes in fair value charged or credited to accumulated OCI in the period in which the change occurs, to the extent the hedge is effective. To the extent the hedge is ineffective, the related changes in fair value are charged or credited to the statement of income in the period in which the change occurs. When the contract is settled or delivered, the net gain or loss is recorded in the statement of income.

Derivative contracts that qualify for regulatory deferral are recorded at fair value, with changes in fair value recorded as regulatory assets or regulatory liabilities in the period in which the change occurs. Ameren Missouri and Ameren Illinois believe derivative gains and losses deferred as regulatory assets and regulatory liabilities are probable of recovery or refund through future rates charged to customers. Regulatory assets and regulatory liabilities are amortized to operating income as related losses and gains are reflected in rates charged to customers. Therefore, gains and losses on these derivatives have no effect on operating income.

Certain derivative contracts are entered into on a regular basis as part of our risk management program but do not qualify for the NPNS exception, hedge accounting, or regulatory deferral accounting. Such contracts are recorded at fair value, with changes in fair value charged or credited to the statement of income in the period in which the change occurs.

Authoritative accounting guidance permits companies to offset fair value amounts recognized for the right to reclaim cash collateral (a receivable) or the obligation to return cash collateral (a liability) against fair value amounts recognized for derivative instruments that are executed with the same counterparty under the same master netting arrangement. The Ameren Companies did not elect to adopt this guidance for any eligible financial instruments or other items.

 

The following table presents the carrying value and balance sheet location of all derivative instruments as of December 31, 2011 and 2010:

 

      Balance Sheet Location      Ameren(a)        Ameren
Missouri
     Ameren
Illinois
     Genco  

2011:

                  

Derivative assets designated as hedging instruments

               

Commodity contracts:            

                  

Power

   MTM derivative assets      $ 8         $ (b    $ (b    $ -   
     Other assets        16           -         -         -   
     Total assets      $ 24         $ -       $ -       $ -   

Derivative liabilities designated as hedging instruments

               

Commodity contracts:

                  

Power

   Other deferred credits and liabilities      $ 1         $ -       $ -       $ -   
     Total liabilities      $ 1         $ -       $ -       $ -   

Derivative assets not designated as hedging instruments(c)

               

Commodity contracts:

                  

Fuel oils

   MTM derivative assets      $ 29         $ (b    $ (b    $ 10   
   Other current assets        -           17         -         -   
   Other assets        8           6         -         1   

Natural gas

   MTM derivative assets        6           (b      (b      2   
   Other current assets        -           2         1         -   
   Other assets        -           -         1         -   

Power

   MTM derivative assets        72           (b      (b      -   
   Other current assets        -           30         -         -   
     Other assets        99           -         77         -   
     Total assets      $         214         $         55       $         79       $         13   

Derivative liabilities not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative liabilities      $ 2       $ (b    $ -       $ 1   
   Other current liabilities        -         1         -         -   

Natural gas

   MTM derivative liabilities        106         (b      90         2   
   Other current liabilities        -         13         -         -   
   Other deferred credits and liabilities        92         13         79         -   

Power

   MTM derivative liabilities        53         (b      9         -   
   MTM derivative liabilities - affiliates        (b      (b      200         -   
   Other current liabilities        -         9         -         -   
   Other deferred credits and liabilities        26         -         8         -   

Uranium

   Other deferred credits and liabilities        1         1         -         -   
     Total liabilities      $ 280       $ 37       $ 386       $ 3   

2010:

                

Derivative assets designated as hedging instruments

             

Commodity contracts:

                

Power

   MTM derivative assets      $ 3       $ (b    $ (b    $ -   
     Other assets        2         -         -         -   
     Total assets      $ 5       $ -       $ -       $ -   

Derivative liabilities designated as hedging instruments

             

Commodity contracts:

                

Power

   MTM derivative liabilities      $ 1       $ (b    $ -       $ -   
     Total liabilities      $ 1       $ -       $ -       $ -   

Derivative assets not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative assets      $ 42       $ (b    $ (b    $ 14   
   Other current assets        -         24         -         -   
   Other assets        22         13         -         7   

Natural gas

   MTM derivative assets        4         (b      (b      1   
   Other current assets        -         1         1         -   
   Other assets        1         -         1         -   

Power

   MTM derivative assets        78         (b      (b      11   
   Other current assets        -         8         2         -   
   Other assets        20         -         6         -   

Uranium

   MTM derivative assets        2         (b      (b      -   
     Other current assets        -         2         -         -   
     Total assets      $ 169       $ 48       $ 10       $ 33   

Derivative liabilities not designated as hedging instruments(c)

             

Commodity contracts:

                

Fuel oils

   MTM derivative liabilities      $ 12       $ (b    $ -       $ 4   
   Other current liabilities        -         7         -         -   
   Other deferred credits and liabilities        1         -         -         -   

Natural gas

   MTM derivative liabilities        87         (b      73         2   
   Other current liabilities        -         11         -         -   
   Other deferred credits and liabilities        84         13         70         -   

Power

   MTM derivative liabilities        61         (b      9         3   
   MTM derivative liabilities - affiliates        (b      (b      172         5   
   Other current liabilities        -         6         -         -   
     Other deferred credits and liabilities        7         -         179         -   
     Total liabilities      $         252       $         37       $         503       $         14   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Balance sheet line item not applicable to registrant.
(c) Includes derivatives subject to regulatory deferral.

 

The following table presents the cumulative amount of pretax net gains (losses) on all derivative instruments in accumulated OCI and regulatory assets or regulatory liabilities as of December 31, 2011 and 2010:

 

        Ameren      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(a)  

2011:

                

Cumulative gains (losses) deferred in accumulated OCI:

                

Power derivative contracts(b)

     $ 19       $ -       $ -       $ -       $ 19   

Interest rate derivative contracts(c)(d)

       (8      -         -         (8      -   

Cumulative gains (losses) deferred in regulatory liabilities or assets:

                

Fuel oils derivative contracts(e)

       19         19         -         -         -   

Natural gas derivative contracts(f)

       (191      (24      (167      -         -   

Power derivative contracts(g)

       81         21         (140      -         200   

Uranium derivative contracts(h)

       (1      (1      -         -         -   

2010:

                

Cumulative gains (losses) deferred in accumulated OCI:

                

Power derivative contracts(b)

     $ 8       $ -       $ -       $ -       $ 8   

Interest rate derivative contracts(c)(d)

       (9      -         -         (9      -   

Cumulative gains (losses) deferred in regulatory liabilities or assets:

                

Fuel oils derivative contracts(e)

       19         19         -         -         -   

Natural gas derivative contracts(f)

       (165      (24      (141      -         -   

Power derivative contracts(g)

       1         3         (352      -         350   

Uranium derivative contracts(h)

       2         2         -         -         -   

 

(a) Includes amounts for Marketing Company and intercompany eliminations.
(b) Represents net gains associated with power derivative contracts at Ameren. These contracts are a partial hedge of electricity price exposure through December 2014 as of December 31, 2011. Current gains of $5 million and $8 million were recorded at Ameren as of December 31, 2011, and December 31, 2010, respectively.
(c) Includes net gains associated with interest rate swaps at Genco that were a partial hedge of the interest rate on debt issued in June 2002. The swaps cover the first 10 years of debt that has a 30-year maturity, and the gain in OCI is amortized over a 10-year period that began in June 2002. The carrying value at December 31, 2011, and December 31, 2010 was less than $1 million and less than $1 million, respectively. The balance of the gain will be amortized by June 2012.
(d) Includes net losses associated with interest rate swaps at Genco. The swaps were executed during the fourth quarter of 2007 as a partial hedge of interest rate risks associated with Genco's April 2008 debt issuance. The loss on the interest rate swaps is being amortized over a 10-year period that began in April 2008. The carrying value at December 31, 2011, and December 31, 2010, was a loss of $9 million and a loss of $10 million, respectively. Over the next 12 months, $1.4 million of the loss will be amortized.
(e) Represents net gains on fuel oils derivative contracts at Ameren Missouri. These contracts are a partial hedge of Ameren Missouri's transportation costs for coal through October 2014 as of December 31, 2011. Current gains deferred as regulatory liabilities include $16 million and $16 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current losses deferred as regulatory assets include $1 million and $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $13 million and $13 million at Ameren and Ameren Missouri as of December 31, 2010, respectively. Current losses deferred as regulatory assets include $6 million and $6 million at Ameren and Ameren Missouri as of December 31, 2010, respectively.
(f) Represents net losses associated with natural gas derivative contracts. These contracts are a partial hedge of natural gas requirements through October 2016 at Ameren, Ameren Missouri, and Ameren Illinois in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $1 million and $1 million at Ameren and Ameren Illinois, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $101 million, $11 million, and $90 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $2 million, $1 million, and $1 million at Ameren, Ameren Missouri, and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $84 million, $11 million, and $73 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
(g) Represents net losses associated with power derivative contracts. These contracts are a partial hedge of power price requirements through May 2032 at Ameren and Ameren Illinois and through December 2015 at Ameren Missouri, in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $29 million and $29 million at Ameren and Ameren Missouri, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $17 million, $8 million, and $209 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $8 million, $6 million, and $2 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $13 million, $3 million, and $181 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
(h) Represents net gains(losses) on uranium derivative contracts at Ameren Missouri. These contracts are a partial hedge of our uranium requirements through December 2013 as of December 31, 2011. Current losses deferred as regulatory assets include less than $1 million and less than $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $2 million at Ameren and $2 million at Ameren Missouri as of December 31, 2010.

Derivative instruments are subject to various credit-related losses in the event of nonperformance by counterparties to the transaction. Exchange-traded contracts are supported by the financial and credit quality of the clearing members of the respective exchanges and have nominal credit risk. In all other transactions, we are exposed to credit risk. Our credit risk management program involves establishing credit limits and collateral requirements for counterparties, using master trading and netting agreements, and reporting daily exposure to senior management.

 

We believe that entering into master trading and netting agreements mitigates the level of financial loss that could result from default by allowing net settlement of derivative assets and liabilities. We generally enter into the following master trading and netting agreements: (1) the International Swaps and Derivatives Association Agreement, a standardized financial natural gas and electric contract; (2) the Master Power Purchase and Sale Agreement, created by the Edison Electric Institute and the National Energy Marketers Association, a standardized contract for the purchase and sale of wholesale power; and (3) the North American Energy Standards Board Inc. agreement, a standardized contract for the purchase and sale of natural gas. These master trading and netting agreements allow the counterparties to net settle sale and purchase transactions. Further, collateral requirements are calculated at a master trading and netting agreement level by counterparty.

Concentrations of Credit Risk

In determining our concentrations of credit risk related to derivative instruments, we review our individual counterparties and categorize each counterparty into one of eight groupings according to the primary business in which each engages. The following table presents the maximum exposure, as of December 31, 2011, and 2010, if counterparty groups were to fail completely to perform on contracts by grouping. The maximum exposure is based on the gross fair value of financial instruments, including NPNS contracts, which excludes collateral held, and does not consider the legally binding right to net transactions based on master trading and netting agreements.

 

      Affiliates(a)     

Coal

Producers

    

Commodity

Marketing

Companies

    

Electric

Utilities

    

Financial

Companies

    

Municipalities/

Cooperatives

     Oil and Gas
Companies
    

Retail

Companies

     Total  

2011:

                          

AMO

   $ 1       $ 35       $ 1       $ 4       $ 26       $ 4       $ -       $ -       $ 71   

AIC

     -         -         84         -         1         -         -         -         85   

Genco

     -         1         1         2         6         -         3         -         13   

Other(b)

     275         1         3         10         51         194         -         87         621   

Ameren

   $         276       $             37       $             89       $             16       $             84       $             198       $             3       $             87       $         790   

2010:

                          

AMO

   $ -       $ 21       $ 1       $ 2       $ 5       $ 11       $ 1       $ -       $ 41   

AIC

     -         -         3         -         1         -         -         -         4   

Genco

     -         6         2         1         1         -         6         -         16   

Other(b)

     410         3         10         19         65         539         3         72         1,121   

Ameren

   $ 410       $ 30       $ 16       $ 22       $ 72       $ 550       $ 10       $ 72       $ 1,182   

 

(a) Primarily composed of Marketing Company's exposure to Ameren Illinois related to financial contracts. The exposure is not eliminated at the consolidated Ameren level for purposes of this disclosure, as it is calculated without regard to the offsetting affiliate counterparty's liability position. See Note 14 – Related Party Transactions for additional information on these financial contracts.
(b) Includes amounts for Marketing Company, AERG, and AFS.

The potential loss on counterparty exposures is reduced by the application of master trading and netting agreements and collateral held to the extent of reducing the exposure to zero. Collateral includes both cash collateral and other collateral held. The amount of cash collateral held by Marketing Company from counterparties and based on the contractual rights under the agreements to seek collateral and the maximum exposure as calculated under the individual master trading and netting agreements was less than $1 million and $1 million from retail companies at December 31, 2011 and 2010, respectively. There was no cash collateral held at Ameren registrant subsidiaries. As of December 31, 2011, other collateral used to reduce exposure consisted of letters of credit in the amount of $9 million, $1 million, $1 million, and $7 million held by Ameren, Ameren Missouri, Genco, and Marketing Company, respectively. As of December 31, 2010, other collateral used to reduce exposure consisted of letters of credit in the amount of $28 million and $1 million held by Ameren and Ameren Illinois, respectively. The following table presents the potential loss after consideration of the application of master trading and netting agreements and collateral held as of December 31, 2011 and 2010:

 

      Affiliates(a)     

Coal

Producers

    

Commodity
Marketing

Companies

    

Electric

Utilities

    

Financial

Companies

    

Municipalities/

Cooperatives

     Oil and Gas
Companies
    

Retail

Companies

     Total  

2011:

                          

AMO

   $ 1       $ 35       $ 1       $ 3       $ 22       $ 4       $ -       $ -       $ 66   

AIC

     -         -         84         -         -         -         -         -         84   

Genco

     -         -         -         1         1         -         2         -         4   

Other(b)

     273         -         3         5         42         187         -         86         596   

Ameren

   $         274       $         35       $         88       $         9       $         65       $         191       $         2       $         86       $         750   

2010:

                          

AMO

   $ -       $ 8       $ -       $ 1       $ 2       $ 10       $ -       $ -       $ 21   

AIC

     -         -         2         -         -         -         -         -         2   

Genco

     -         1         1         1         1         -         5         -         9   

Other(b)

     404         1         8         7         56         513         2         71         1,062   

Ameren

   $         404       $         10       $         11       $         9       $         59       $         523       $         7       $         71       $       1,094   

 

(a) Primarily comprised of Marketing Company's exposure to Ameren Illinois related to financial contracts. The exposure is not eliminated at the consolidated Ameren level for purposes of this disclosure, as it is calculated without regard to the offsetting affiliate counterparty's liability position. See Note 14 – Related Party Transactions for additional information on these financial contracts.
(b) Includes amounts for Marketing Company, AERG, and AFS.

Derivative Instruments with Credit Risk-Related Contingent Features

Our commodity contracts contain collateral provisions tied to the Ameren Companies' credit ratings. If we were to experience an adverse change in our credit ratings, or if a counterparty with reasonable grounds for uncertainty regarding performance of an obligation requested adequate assurance of performance, additional collateral postings might be required. The following table presents, as of December 31, 2011, and 2010, the aggregate fair value of all derivative instruments with credit risk-related contingent features in a gross liability position, the cash collateral posted, and the aggregate amount of additional collateral that could be required to be posted with counterparties. The additional collateral required is the net liability position allowed under the master trading and netting agreements assuming (1) the credit risk-related contingent features underlying these agreements were triggered on December 31, 2011, or 2010, respectively, and (2) those counterparties with rights to do so requested collateral:

 

     

Aggregate Fair Value of

Derivative Liabilities(a)

    

Cash

Collateral Posted

     Potential Aggregate Amount of
Additional Collateral Required(b)
 

2011:

        

Ameren Missouri

   $         102       $ 8       $ 86   

Ameren Illinois

     220                 96                 125   

Genco

     55         1         58   

Other(c)

     79         11         63   

Ameren

   $ 456       $ 116       $ 332   

2010:

        

Ameren Missouri

   $ 105       $ 7       $ 93   

Ameren Illinois

     233         109         111   

Genco

     31         -         28   

Other(c)

     62         18         42   

Ameren

   $ 431       $ 134       $ 274   

 

(a) Prior to consideration of master trading and netting agreements and including NPNS contract exposures.
(b) As collateral requirements with certain counterparties are based on master trading and netting agreements, the aggregate amount of additional collateral required to be posted is determined after consideration of the effects of such agreements.
(c) Includes amounts for Marketing Company and Ameren (parent).

 

Cash Flow Hedges

The following table presents the pretax net gain or loss for the year ended December 31, 2011 and 2010, associated with derivative instruments designated as cash flow hedges:

 

    

Gain (Loss)

Recognized in OCI(a)

   

Location of (Gain) Loss

Reclassified from

Accumulated OCI into

Income(b)

 

(Gain) Loss

Reclassified from

Accumulated OCI

into Income(b)

    Location of Gain (Loss)
Recognized in Income(c)
 

Gain (Loss)
Recognized

in Income(c)

 

2011:                        

         

Ameren:(d)

         

Power

  $ 6      Operating Revenues - Electric   $         5      Operating Revenues - Electric   $ (10

Interest rate(e)

    -      Interest Charges     (f   Interest Charges               -   

Genco:

         

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

2010:

         

Ameren:(d)

         

Power

  $ (2   Operating Revenues - Electric   $ (14   Operating Revenues - Electric   $ (3

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

Genco:

         

Interest rate(e)

    -      Interest Charges     (f   Interest Charges     -   

 

(a) Effective portion of gain (loss).
(b) Effective portion of (gain) loss on settlements.
(c) Ineffective portion of gain (loss) and amount excluded from effectiveness testing.
(d) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(e) Represents interest rate swaps settled in prior periods. The cumulative gain and loss on the interest rate swaps is being amortized into income over a 10-year period.
(f) Less than $1 million.

Other Derivatives

The following table represents the net change in market value associated with derivatives not designated as hedging instruments for the years ended December 31, 2011 and 2010:

 

     

Location of Gain (Loss)

Recognized in Income

  

Gain (Loss) Recognized

in Income

 
      2011     2010  

Ameren(a)

   Fuel oils    Operating Expenses - Fuel    $ (1   $ 9   
   Natural gas (generation)    Operating Expenses - Fuel      2        -   
     Power    Operating Revenues - Electric      (2     9   
          Total    $ (1   $ 18   

Ameren Missouri

   Natural gas (generation)    Operating Expenses - Fuel    $ (1   $ 1   

Genco

   Fuel oils    Operating Expenses - Fuel    $ (1   $ 7   
   Natural gas (generation)    Operating Expenses - Fuel      2        -   
     Power    Operating Revenues      (3     1   
          Total    $ (2   $ 8   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

 

Derivatives Subject to Regulatory Deferral

The following table represents the net change in market value associated with derivatives that qualify for regulatory deferral for the years ended December 31, 2011 and 2010:

 

     

Gain (Loss) Recognized

In Regulatory Liabilities

or Regulatory Assets

 
   2011      2010  

Ameren(a)

   Fuel oils    $ -       $ 14   
   Natural gas      (26      (91
   Power      80         12   
     Uranium      (3      4   
     Total    $ 51       $ (61

Ameren

   Fuel oils    $ -       $ 14   

Missouri

   Natural gas      -         (11
   Power      18         4   
     Uranium      (3      4   
     Total    $ 15       $ 11   

Ameren

   Natural gas    $ (26    $ (80

Illinois

   Power      212         70   
     Total    $ 186       $ (10

 

(a) Includes amounts for intercompany eliminations.

As part of the 2007 Illinois Electric Settlement Agreement and subsequent Illinois power procurement processes, Ameren Illinois entered into financial contracts with Marketing Company. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives that qualify for regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities by Ameren Illinois and OCI by Marketing Company. In Ameren's consolidated financial statements, all financial statement effects of the derivative instruments entered into among affiliates were eliminated. See Note 14 – Related Party Transactions for additional information on these financial contracts. The following table presents the fair value of the financial contracts included on Ameren Illinois' balance sheet at December 31, 2011 and 2010:

 

            2011      2010  

Ameren Illinois

   MTM derivative liabilities - affiliates    $ 200       $ 172   
     Other deferred credits and liabilities      -         178   
     Total    $ 200       $ 350
Fair Value Measurements

NOTE 8 – FAIR VALUE MEASUREMENTS

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We use various methods to determine fair value, including market, income, and cost approaches. With these approaches, we adopt certain assumptions that market participants would use in pricing the asset or liability, including assumptions about market risk or the risks inherent in the inputs to the valuation. Inputs to valuation can be readily observable, market-corroborated, or unobservable. We use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Authoritative accounting guidance established a fair value hierarchy that prioritizes the inputs used to measure fair value. All financial assets and liabilities carried at fair value are classified and disclosed in one of the following three hierarchy levels:

Level 1: Inputs based on quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities are primarily exchange-traded derivatives and assets, including cash and cash equivalents and listed equity securities, such as those held in Ameren Missouri's Nuclear Decommissioning Trust Fund.

Level 2: Market-based inputs corroborated by third-party brokers or exchanges based on transacted market data. Level 2 assets and liabilities include certain assets held in Ameren Missouri's Nuclear Decommissioning Trust Fund, including corporate bonds and other fixed-income securities, U.S. treasury and agency securities, and certain over-the-counter derivative instruments, including natural gas swaps and financial power transactions. Derivative instruments classified as Level 2 are valued by corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. To derive our forward view to price our derivative instruments at fair value, we average the midpoints of the bid/ask spreads. To validate forward prices obtained from outside parties, we compare the pricing to recently settled market transactions. Additionally, a review of all sources is performed to identify any anomalies or potential errors. Further, we consider the volume of transactions on certain trading platforms in our reasonableness assessment of the averaged midpoint.

Level 3: Unobservable inputs that are not corroborated by market data. Level 3 assets and liabilities are valued by internally developed models and assumptions or methodologies that use significant unobservable inputs. Level 3 assets and liabilities include derivative instruments that trade in less liquid markets, where pricing is largely unobservable, including the financial contracts entered into between Ameren Illinois and Marketing Company. We value Level 3 instruments by using pricing models with inputs that are often unobservable in the market, as well as certain internal assumptions. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. As a part of our reasonableness review, an evaluation of all sources is performed to identify any anomalies or potential errors.

We perform an analysis each quarter to determine the appropriate hierarchy level of the assets and liabilities subject to fair value measurements. Financial assets and liabilities are classified in their entirety according to the lowest level of input that is significant to the fair value measurement. All assets and liabilities whose fair value measurement is based on significant unobservable inputs are classified as Level 3.

In accordance with applicable authoritative accounting guidance, we consider nonperformance risk in our valuation of derivative instruments by analyzing the credit standing of our counterparties and considering any counterparty credit enhancements (e.g., collateral). The guidance also requires that the fair value measurement of liabilities reflect the nonperformance risk of the reporting entity, as applicable. Therefore, we have factored the impact of our credit standing as well as any potential credit enhancements into the fair value measurement of both derivative assets and derivative liabilities. Included in our valuation, and based on current market conditions, is a valuation adjustment for counterparty default derived from market data such as the price of credit default swaps, bond yields, and credit ratings. Ameren recorded net losses of $2 million, net gains of less than $1 million, and net losses of less than $1 million in 2011, 2010 and 2009, respectively, related to valuation adjustments for counterparty default risk. Genco recorded net losses of less than $1 million, net gains of less than $1 million, and net gains of less than $1 million in 2011, 2010, and 2009, respectively, related to valuation adjustments for counterparty default risk. At December 31, 2011, the counterparty default risk (asset)/liability valuation adjustment related to derivative contracts totaled $1 million, less than $1 million, $19 million, and less than $(1) million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. At December 31, 2010, the counterparty default risk liability valuation adjustment related to derivative contracts totaled $2 million, less than $1 million, $21 million, and less than $1 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2011:

 

 

In January 2010, the FASB issued amended authoritative guidance regarding fair value measurements. This guidance required disclosures regarding significant transfers into and out of Level 1 and Level 2 fair value measurements. It also required information on purchases, sales, issuances, and settlements on a gross basis in the reconciliation of Level 3 fair value measurements. This guidance was effective for us as of January 1, 2010, with the exception of guidance applicable to detailed Level 3 reconciliation disclosures, which became effective for us as of January 1, 2011. The adoption of this guidance did not have a material impact on our results of operations, financial position, or liquidity because it provides enhanced disclosure requirements only.

 

Transfers in or out of Level 3 represent either (1) existing assets and liabilities that were previously categorized as a higher level but were recategorized to Level 3 because the inputs to the model became unobservable during the period, or (2) existing assets and liabilities that were previously classified as Level 3 but were recategorized to a higher level because the lowest significant input became observable during the period. Transfers between Level 2 and Level 3 were primarily caused by changes in availability of financial power trades observable on electronic exchanges from the previous reporting period for the years ended December 31, 2011 and 2010. Any reclassifications are reported as transfers out of Level 3 at the fair value measurement reported at the beginning of the period in which the changes occur. For the years ended December 31, 2011 and 2010, there were no transfers between Level 1 and Level 2 related to derivative commodity contracts. The following table summarizes all transfers between fair value hierarchy levels related to derivative commodity contracts for the years ended December 31, 2011 and 2010:

 

See Note 11 – Retirement Benefits for the fair value hierarchy tables detailing Ameren's pension and postretirement plan assets as of December 31, 2011, as well as a table summarizing the changes in Level 3 plan assets during 2011.

The Ameren Companies' carrying amounts of cash and cash equivalents, accounts receivable, short-term borrowings, and accounts payable approximate fair value because of the short-term nature of these instruments. The estimated fair value of long-term debt and preferred stock is based on the quoted market prices for same or similar issues for companies with similar credit profiles or on the current rates offered to the Ameren Companies for similar financial instruments.

The following table presents the carrying amounts and estimated fair values of our long-term debt and preferred stock at December 31, 2011 and 2010:

 

NOTE 8 – FAIR VALUE MEASUREMENTS

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We use various methods to determine fair value, including market, income, and cost approaches. With these approaches, we adopt certain assumptions that market participants would use in pricing the asset or liability, including assumptions about market risk or the risks inherent in the inputs to the valuation. Inputs to valuation can be readily observable, market-corroborated, or unobservable. We use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Authoritative accounting guidance established a fair value hierarchy that prioritizes the inputs used to measure fair value. All financial assets and liabilities carried at fair value are classified and disclosed in one of the following three hierarchy levels:

Level 1: Inputs based on quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities are primarily exchange-traded derivatives and assets, including cash and cash equivalents and listed equity securities, such as those held in Ameren Missouri's Nuclear Decommissioning Trust Fund.

Level 2: Market-based inputs corroborated by third-party brokers or exchanges based on transacted market data. Level 2 assets and liabilities include certain assets held in Ameren Missouri's Nuclear Decommissioning Trust Fund, including corporate bonds and other fixed-income securities, U.S. treasury and agency securities, and certain over-the-counter derivative instruments, including natural gas swaps and financial power transactions. Derivative instruments classified as Level 2 are valued by corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. To derive our forward view to price our derivative instruments at fair value, we average the midpoints of the bid/ask spreads. To validate forward prices obtained from outside parties, we compare the pricing to recently settled market transactions. Additionally, a review of all sources is performed to identify any anomalies or potential errors. Further, we consider the volume of transactions on certain trading platforms in our reasonableness assessment of the averaged midpoint.

Level 3: Unobservable inputs that are not corroborated by market data. Level 3 assets and liabilities are valued by internally developed models and assumptions or methodologies that use significant unobservable inputs. Level 3 assets and liabilities include derivative instruments that trade in less liquid markets, where pricing is largely unobservable, including the financial contracts entered into between Ameren Illinois and Marketing Company. We value Level 3 instruments by using pricing models with inputs that are often unobservable in the market, as well as certain internal assumptions. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. As a part of our reasonableness review, an evaluation of all sources is performed to identify any anomalies or potential errors.

We perform an analysis each quarter to determine the appropriate hierarchy level of the assets and liabilities subject to fair value measurements. Financial assets and liabilities are classified in their entirety according to the lowest level of input that is significant to the fair value measurement. All assets and liabilities whose fair value measurement is based on significant unobservable inputs are classified as Level 3.

In accordance with applicable authoritative accounting guidance, we consider nonperformance risk in our valuation of derivative instruments by analyzing the credit standing of our counterparties and considering any counterparty credit enhancements (e.g., collateral). The guidance also requires that the fair value measurement of liabilities reflect the nonperformance risk of the reporting entity, as applicable. Therefore, we have factored the impact of our credit standing as well as any potential credit enhancements into the fair value measurement of both derivative assets and derivative liabilities. Included in our valuation, and based on current market conditions, is a valuation adjustment for counterparty default derived from market data such as the price of credit default swaps, bond yields, and credit ratings. Ameren recorded net losses of $2 million, net gains of less than $1 million, and net losses of less than $1 million in 2011, 2010 and 2009, respectively, related to valuation adjustments for counterparty default risk. Genco recorded net losses of less than $1 million, net gains of less than $1 million, and net gains of less than $1 million in 2011, 2010, and 2009, respectively, related to valuation adjustments for counterparty default risk. At December 31, 2011, the counterparty default risk (asset)/liability valuation adjustment related to derivative contracts totaled $1 million, less than $1 million, $19 million, and less than $(1) million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. At December 31, 2010, the counterparty default risk liability valuation adjustment related to derivative contracts totaled $2 million, less than $1 million, $21 million, and less than $1 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2011:

 

           

Quoted Prices in

Active Markets for
Identical Assets

or Liabilities

(Level 1)

    

Significant Other
Observable
Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

       Total  

Assets:

                

Ameren(a)

   Derivative assets - commodity contracts(b):              
  

Fuel oils

   $ 33       $ -       $ 4         $ 37   
  

Natural gas

     4         -         2           6   
  

Power

     -         2         193           195   
   Nuclear Decommissioning Trust Fund(c):              
  

Cash and cash equivalents

     3         -         -           3   
  

Equity securities:

             
  

U.S. large capitalization

     234         -         -           234   
  

Debt securities:

             
  

Corporate bonds

     -         44         -           44   
  

Municipal bonds

     -         1         -           1   
  

U.S. treasury and agency securities

     -         65         -           65   
  

Asset-backed securities

     -         10         -           10   
    

Other

     -         1         -           1   

Ameren

   Derivative assets - commodity contracts(b):              

Missouri

  

Fuel oils

     20         -         3           23   
  

Natural gas

     2         -         -           2   
  

Power

     -         1         29           30   
   Nuclear Decommissioning Trust Fund(c):              
  

Cash and cash equivalents

     3         -         -           3   
  

Equity securities:

             
  

U.S. large capitalization

     234         -         -           234   
  

Debt securities:

             
  

Corporate bonds

     -         44         -           44   
  

Municipal bonds

     -         1         -           1   
  

U.S. treasury and agency securities

     -         65         -           65   
  

Asset-backed securities

     -         10         -           10   
    

Other

     -         1         -           1   

Ameren

   Derivative assets - commodity contracts(b):              

Illinois

  

Natural gas

     -         -         2           2   
    

Power

     -         -         77           77   

Genco

   Derivative assets - commodity contracts(b):              
  

Fuel oils

     10         -         1           11   
    

Natural gas

     2         -         -           2   

Liabilities:

                

Ameren(a)

   Derivative liabilities - commodity contracts(b):              
  

Fuel oils

   $ 2       $ -       $ -         $ 2   
  

Natural gas

     22         -         176           198   
  

Power

     -         2         78           80   
    

Uranium

     -         -         1           1   

Ameren

   Derivative liabilities - commodity contracts(b):              

Missouri

  

Fuel oils

     1         -         -           1   
  

Natural gas

     12         -         14           26   
  

Power

     -         1         8           9   
    

Uranium

     -         -         1           1   

Ameren

   Derivative liabilities - commodity contracts(b):              

Illinois

  

Natural gas

     7         -         162           169   
    

Power

     -         -         217           217   

Genco

   Derivative liabilities - commodity contracts(b):              
  

Fuel oils

     1         -         -           1   
    

Natural gas

     2         -         -           2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) The derivative asset and liability balances are presented net of counterparty credit considerations.
(c) Balance excludes $(1) million of receivables, payables, and accrued income, net.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2010:

 

           

Quoted Prices in

Active Markets for
Identical Assets

or Liabilities

(Level 1)

    

Significant Other
Observable Inputs

(Level 2)

    

Significant
Other

Unobservable
Inputs

(Level 3)

     Total  

Assets:

              

Ameren(a)

   Derivative assets - commodity contracts(b):            
  

Fuel oils

   $ -       $ -       $ 64       $ 64   
  

Natural gas

     3         -         2         5   
  

Power

     -         17         86         103   
  

Uranium

     -         -         2         2   
   Nuclear Decommissioning Trust Fund(c):            
  

Cash and cash equivalents

     1         -         -         1   
  

Equity securities:

           
  

U.S. large capitalization

     228         -         -         228   
  

Debt securities:

           
  

Corporate bonds

     -         40         -         40   
  

Municipal bonds

     -         2         -         2   
  

U.S. treasury and agency securities

     -         50         -         50   
  

Asset-backed securities

     -         14         -         14   
    

Other

     -         1         -         1   

Ameren

   Derivative assets - commodity contracts(b):            

Missouri

  

Fuel oils

     -         -         37         37   
  

Natural gas

     -         -         1         1   
  

Power

     -         3         5         8   
  

Uranium

     -         -         2         2   
   Nuclear Decommissioning Trust Fund(c):            
  

Cash and cash equivalents

     1         -         -         1   
  

Equity securities:

           
  

U.S. large capitalization

     228         -         -         228   
  

Debt securities:

           
  

Corporate bonds

     -         40         -         40   
  

Municipal bonds

     -         2         -         2   
  

U.S. treasury and agency securities

     -         50         -         50   
  

Asset-backed securities

     -         14         -         14   
    

Other

     -         1         -         1   

Ameren

   Derivative assets - commodity contracts(b):            

Illinois

  

Natural gas

     -         -         2         2   
    

Power

     -         -         8         8   

Genco

   Derivative assets - commodity contracts(b):            
  

Fuel oils

     -         -         21         21   
  

Natural gas

     1         -         -         1   
    

Power

     -         -         11         11   

Liabilities:

              

Ameren(a)

   Derivative liabilities - commodity contracts(b):            
  

Fuel oils

   $ -       $ -       $ 13       $ 13   
  

Natural gas

     21         -         150         171   
    

Power

     -         19         50         69   

Ameren

   Derivative liabilities - commodity contracts(b):            

Missouri

  

Fuel oils

     -         -         7         7   
  

Natural gas

     9         -         15         24   
    

Power

     -         3         3         6   

Ameren

   Derivative liabilities - commodity contracts(b):            

Illinois

  

Natural gas

     7         -         136         143   
    

Power

     -         -         360         360   

Genco

   Derivative liabilities - commodity contracts(b):            
  

Fuel oils

     -         -         4         4   
  

Natural gas

     2         -         -         2   
    

Power

     -         -         8         8   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) The derivative asset and liability balances are presented net of counterparty credit considerations.
(c) Balance excludes $1 million of receivables, payables, and accrued income, net.

 

In January 2010, the FASB issued amended authoritative guidance regarding fair value measurements. This guidance required disclosures regarding significant transfers into and out of Level 1 and Level 2 fair value measurements. It also required information on purchases, sales, issuances, and settlements on a gross basis in the reconciliation of Level 3 fair value measurements. This guidance was effective for us as of January 1, 2010, with the exception of guidance applicable to detailed Level 3 reconciliation disclosures, which became effective for us as of January 1, 2011. The adoption of this guidance did not have a material impact on our results of operations, financial position, or liquidity because it provides enhanced disclosure requirements only.

The following table summarizes the changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy as of December 31, 2011:

 

      Net derivative commodity contracts  
      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(c)      Ameren  

Fuel oils:

              

Beginning balance at January 1, 2011

   $ 30       $ (a    $ 17       $ 4       $ 51   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         (a      12         4         16   

Included in regulatory assets/liabilities

     19         (a      (a      (a      19   

Total realized and unrealized gains (losses)

     19         (a      12         4         35   

Purchases

     4         (a      1         -         5   

Sales

     (1      (a      -         -         (1

Settlements

     (30      (a      (20      (6      (56

Transfers into Level 3

     -         (a      -         -         -   

Transfers out of Level 3

     (19      (a      (9      (2      (30

Ending balance at December 31, 2011

   $ 3       $ (a    $ 1       $ -       $ 4   

Change in unrealized gains (losses) related to assets/liabilities held at December 31,2011

   $ (11    $ (a    $ (5    $ (2    $ (18

Natural gas:

              

Beginning balance at January 1, 2011

   $ (14    $ (134    $ -       $ -       $ (148

Realized and unrealized gains (losses):

               $     

Included in regulatory assets/liabilities

     (8      (107      (a      (a      (115

Total realized and unrealized gains (losses)

     (8      (107      (a      (a    $ (115

Purchases

     -         1         -         -         1   

Sales

     -         (1      -         -         (1

Settlements

     8         81         -         -         89   

Ending balance at December 31, 2011

   $ (14    $ (160    $ -       $ -       $ (174

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ (6    $ (72    $ -       $ -       $ (78

Power:

              

Beginning balance at January 1, 2011

   $ 2       $ (352    $ 3       $ 383       $ 36   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         -         (1      (12      (13

Included in OCI

     -         -         -         24         24   

Included in regulatory assets/liabilities

     17         7         (a      51       $ 75   

Total realized and unrealized gains (losses)

     17         7         (1      63       $ 86   

Purchases

     30         -         -         35         65   

Sales

     (1      -         -         (21    $ (22

Settlements

     (27      205         (2      (225      (49

Transfers into Level 3

     (1      -         -         1         -   

Transfers out of Level 3

     1         -         -         (2      (1

Ending balance at December 31, 2011

   $ 21       $ (140    $ -       $ 234       $ 115   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ 1       $ 13       $ (1    $ 60       $ 73   

Uranium:

              

Beginning balance at January 1, 2011

   $ 2       $ (a    $ (a    $ (a    $ 2   

Realized and unrealized gains (losses):

              

Included in regulatory assets/liabilities

     (3      (a      (a      (a      (3

Total realized and unrealized gains (losses)

     (3      (a      (a      (a      (3

Purchases

     (1      (a      (a      (a      (1

Settlements

     1         (a      (a      (a      1   

Ending balance at December 31, 2011

   $ (1    $ (a    $ (a    $ (a    $ (1

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ -       $ (a    $ (a    $ (a    $ -   

 

(a) Not applicable.
(b) Net gains and losses on fuel oils and natural gas derivative commodity contracts are recorded in "Operating Expenses – Fuel", while net gains and losses on power derivative commodity contracts are recorded in "Operating Revenues – Electric."
(c) Includes amounts for Merchant Generation nonregistrant subsidiaries and intercompany eliminations.

 

The following table summarizes the changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy as of December 31, 2010:

 

      Net derivative commodity contracts  
      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(c)      Ameren  

Fuel oils:

              

Beginning balance at January 1, 2010

   $ 32       $ (a    $ 21       $ 7       $ 60   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         (a      3         (2      1   

Included in regulatory assets/liabilities

     8         (a      (a      (a      8   

Total realized and unrealized gains (losses)

     8         (a      3         (2      9   

Purchases

     18         (a      11         4         33   

Settlements

     (28      (a      (18      (5      (51

Ending balance at December 31, 2010

   $ 30       $ (a    $ 17       $ 4       $ 51   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 7       $ (a    $ 4       $ -       $ 11   

Natural gas:

              

Beginning balance at January 1, 2010

   $ (6    $ (61    $ -       $ -       $ (67

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         -         -         -         -   

Included in regulatory assets/liabilities

     (20      (152      (a      (a      (172

Total realized and unrealized gains (losses)

     (20      (152      -         -         (172

Purchases

     -         (5      -         -       $ (5

Settlements

     12         84         -         -         96   

Ending balance at December 31, 2010

   $ (14    $ (134    $ -       $ -       $ (148

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ (11    $ (82    $ -       $ 1       $ (92

Power:

              

Beginning balance at January 1, 2010

   $ (1    $ (422    $ 1       $ 460       $ 38   

Realized and unrealized gains (losses):

              

Included in earnings(b)

   $ -       $ -       $ 2       $ 32       $ 34   

Included in OCI

     -         -         -         8         8   

Included in regulatory assets/liabilities

     27         (107      (a      95         15   

Total realized and unrealized gains (losses)

     27         (107      2         135         57   

Purchases

     4         19         (10      26         39   

Sales

     2         -         12         (13      1   

Settlements

     (24      158         (2      (197      (65

Transfers into Level 3

     -         -         -         (2      (2

Transfers out of Level 3

     (6      -         -         (26      (32

Ending balance at December 31, 2010

   $ 2       $ (352    $ 3       $ 383       $ 36   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 1       $ (89    $ -       $ 81       $ (7

Uranium:

              

Beginning balance at January 1, 2010

   $ (2    $ (a    $ (a    $ (a    $ (2

Realized and unrealized gains (losses):

              

Included in regulatory assets/liabilities

     3         (a      (a      (a      3   

Total realized and unrealized gains (losses)

     3         (a      (a      (a    $ 3   

Settlements

     1         (a      (a      (a      1   

Ending balance at December 31, 2010

   $ 2       $ (a    $ (a    $ (a    $ 2   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 1       $ (a    $ (a    $ (a    $ 1   

 

(a) Not applicable.
(b) Net gains and losses on heating oil and natural gas derivative commodity contracts are recorded in Operating Expenses – Fuel, while net gains and losses on power derivative commodity contracts are recorded in Operating Revenues – Electric.
(c) Includes amounts for Merchant Generation nonregistrant subsidiaries and intercompany eliminations.

 

Transfers in or out of Level 3 represent either (1) existing assets and liabilities that were previously categorized as a higher level but were recategorized to Level 3 because the inputs to the model became unobservable during the period, or (2) existing assets and liabilities that were previously classified as Level 3 but were recategorized to a higher level because the lowest significant input became observable during the period. Transfers between Level 2 and Level 3 were primarily caused by changes in availability of financial power trades observable on electronic exchanges from the previous reporting period for the years ended December 31, 2011 and 2010. Any reclassifications are reported as transfers out of Level 3 at the fair value measurement reported at the beginning of the period in which the changes occur. For the years ended December 31, 2011 and 2010, there were no transfers between Level 1 and Level 2 related to derivative commodity contracts. The following table summarizes all transfers between fair value hierarchy levels related to derivative commodity contracts for the years ended December 31, 2011 and 2010:

 

      2011      2010  

Ameren - derivative commodity contracts:(a)

     

Transfers into Level 3 / Transfers out of Level 1

   $      $ (1

Transfers out of Level 3 / Transfers into Level 1

     (30      -   

Transfers into Level 3 / Transfers out of Level 2

     -         (1 )  

Transfers out of Level 3 / Transfers into Level 2

     (1      (32

Net fair value of Level 3 transfers

   $ (31    $ (34

Ameren Missouri – derivative commodity contracts:

     

Transfers out of Level 3 / Transfers into Level 1

     (19      -   

Transfers into Level 3 / Transfers out of Level 2

     (1      -   

Transfers out of Level 3 / Transfers into Level 2

   $ 1       $ (6

Net fair value of Level 3 transfers

   $ (19    $ (6

Genco – derivative commodity contracts:

     

Transfers out of Level 3 / Transfers into Level 1

   $ (9    $ -   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

See Note 11 – Retirement Benefits for the fair value hierarchy tables detailing Ameren's pension and postretirement plan assets as of December 31, 2011, as well as a table summarizing the changes in Level 3 plan assets during 2011.

The Ameren Companies' carrying amounts of cash and cash equivalents, accounts receivable, short-term borrowings, and accounts payable approximate fair value because of the short-term nature of these instruments. The estimated fair value of long-term debt and preferred stock is based on the quoted market prices for same or similar issues for companies with similar credit profiles or on the current rates offered to the Ameren Companies for similar financial instruments.

The following table presents the carrying amounts and estimated fair values of our long-term debt and preferred stock at December 31, 2011 and 2010:

 

      2011      2010  
      Carrying Amount      Fair Value      Carrying Amount      Fair Value  

Ameren:(a)(b)

           

Long-term debt and capital lease obligations (including current portion)

   $ 6,856       $ 7,800       $ 7,008       $ 7,661   

Preferred stock

     142         92         142         102   

Ameren Missouri:

           

Long-term debt and capital lease obligations (including current portion)

   $ 3,950       $ 4,541       $ 3,954       $ 4,281   

Preferred stock

     80         55         80         62   

Ameren Illinois:

           

Long-term debt (including current portion)

   $ 1,658       $ 1,943       $ 1,807       $ 2,067   

Preferred stock

     62         37         62         40   

Genco:

           

Long-term debt (including current portion)

   $ 824       $ 839       $ 824       $ 826   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Preferred stock along with the 20% noncontrolling interest of EEI is recorded in Noncontrolling Interests on the balance sheet.

NOTE 8 – FAIR VALUE MEASUREMENTS

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We use various methods to determine fair value, including market, income, and cost approaches. With these approaches, we adopt certain assumptions that market participants would use in pricing the asset or liability, including assumptions about market risk or the risks inherent in the inputs to the valuation. Inputs to valuation can be readily observable, market-corroborated, or unobservable. We use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Authoritative accounting guidance established a fair value hierarchy that prioritizes the inputs used to measure fair value. All financial assets and liabilities carried at fair value are classified and disclosed in one of the following three hierarchy levels:

Level 1: Inputs based on quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities are primarily exchange-traded derivatives and assets, including cash and cash equivalents and listed equity securities, such as those held in Ameren Missouri's Nuclear Decommissioning Trust Fund.

Level 2: Market-based inputs corroborated by third-party brokers or exchanges based on transacted market data. Level 2 assets and liabilities include certain assets held in Ameren Missouri's Nuclear Decommissioning Trust Fund, including corporate bonds and other fixed-income securities, U.S. treasury and agency securities, and certain over-the-counter derivative instruments, including natural gas swaps and financial power transactions. Derivative instruments classified as Level 2 are valued by corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. To derive our forward view to price our derivative instruments at fair value, we average the midpoints of the bid/ask spreads. To validate forward prices obtained from outside parties, we compare the pricing to recently settled market transactions. Additionally, a review of all sources is performed to identify any anomalies or potential errors. Further, we consider the volume of transactions on certain trading platforms in our reasonableness assessment of the averaged midpoint.

Level 3: Unobservable inputs that are not corroborated by market data. Level 3 assets and liabilities are valued by internally developed models and assumptions or methodologies that use significant unobservable inputs. Level 3 assets and liabilities include derivative instruments that trade in less liquid markets, where pricing is largely unobservable, including the financial contracts entered into between Ameren Illinois and Marketing Company. We value Level 3 instruments by using pricing models with inputs that are often unobservable in the market, as well as certain internal assumptions. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. As a part of our reasonableness review, an evaluation of all sources is performed to identify any anomalies or potential errors.

We perform an analysis each quarter to determine the appropriate hierarchy level of the assets and liabilities subject to fair value measurements. Financial assets and liabilities are classified in their entirety according to the lowest level of input that is significant to the fair value measurement. All assets and liabilities whose fair value measurement is based on significant unobservable inputs are classified as Level 3.

In accordance with applicable authoritative accounting guidance, we consider nonperformance risk in our valuation of derivative instruments by analyzing the credit standing of our counterparties and considering any counterparty credit enhancements (e.g., collateral). The guidance also requires that the fair value measurement of liabilities reflect the nonperformance risk of the reporting entity, as applicable. Therefore, we have factored the impact of our credit standing as well as any potential credit enhancements into the fair value measurement of both derivative assets and derivative liabilities. Included in our valuation, and based on current market conditions, is a valuation adjustment for counterparty default derived from market data such as the price of credit default swaps, bond yields, and credit ratings. Ameren recorded net losses of $2 million, net gains of less than $1 million, and net losses of less than $1 million in 2011, 2010 and 2009, respectively, related to valuation adjustments for counterparty default risk. Genco recorded net losses of less than $1 million, net gains of less than $1 million, and net gains of less than $1 million in 2011, 2010, and 2009, respectively, related to valuation adjustments for counterparty default risk. At December 31, 2011, the counterparty default risk (asset)/liability valuation adjustment related to derivative contracts totaled $1 million, less than $1 million, $19 million, and less than $(1) million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. At December 31, 2010, the counterparty default risk liability valuation adjustment related to derivative contracts totaled $2 million, less than $1 million, $21 million, and less than $1 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2011:

 

           

Quoted Prices in

Active Markets for
Identical Assets

or Liabilities

(Level 1)

    

Significant Other
Observable
Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

       Total  

Assets:

                

Ameren(a)

   Derivative assets - commodity contracts(b):              
  

Fuel oils

   $ 33       $ -       $ 4         $ 37   
  

Natural gas

     4         -         2           6   
  

Power

     -         2         193           195   
   Nuclear Decommissioning Trust Fund(c):              
  

Cash and cash equivalents

     3         -         -           3   
  

Equity securities:

             
  

U.S. large capitalization

     234         -         -           234   
  

Debt securities:

             
  

Corporate bonds

     -         44         -           44   
  

Municipal bonds

     -         1         -           1   
  

U.S. treasury and agency securities

     -         65         -           65   
  

Asset-backed securities

     -         10         -           10   
    

Other

     -         1         -           1   

Ameren

   Derivative assets - commodity contracts(b):              

Missouri

  

Fuel oils

     20         -         3           23   
  

Natural gas

     2         -         -           2   
  

Power

     -         1         29           30   
   Nuclear Decommissioning Trust Fund(c):              
  

Cash and cash equivalents

     3         -         -           3   
  

Equity securities:

             
  

U.S. large capitalization

     234         -         -           234   
  

Debt securities:

             
  

Corporate bonds

     -         44         -           44   
  

Municipal bonds

     -         1         -           1   
  

U.S. treasury and agency securities

     -         65         -           65   
  

Asset-backed securities

     -         10         -           10   
    

Other

     -         1         -           1   

Ameren

   Derivative assets - commodity contracts(b):              

Illinois

  

Natural gas

     -         -         2           2   
    

Power

     -         -         77           77   

Genco

   Derivative assets - commodity contracts(b):              
  

Fuel oils

     10         -         1           11   
    

Natural gas

     2         -         -           2   

Liabilities:

                

Ameren(a)

   Derivative liabilities - commodity contracts(b):              
  

Fuel oils

   $ 2       $ -       $ -         $ 2   
  

Natural gas

     22         -         176           198   
  

Power

     -         2         78           80   
    

Uranium

     -         -         1           1   

Ameren

   Derivative liabilities - commodity contracts(b):              

Missouri

  

Fuel oils

     1         -         -           1   
  

Natural gas

     12         -         14           26   
  

Power

     -         1         8           9   
    

Uranium

     -         -         1           1   

Ameren

   Derivative liabilities - commodity contracts(b):              

Illinois

  

Natural gas

     7         -         162           169   
    

Power

     -         -         217           217   

Genco

   Derivative liabilities - commodity contracts(b):              
  

Fuel oils

     1         -         -           1   
    

Natural gas

     2         -         -           2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) The derivative asset and liability balances are presented net of counterparty credit considerations.
(c) Balance excludes $(1) million of receivables, payables, and accrued income, net.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2010:

 

           

Quoted Prices in

Active Markets for
Identical Assets

or Liabilities

(Level 1)

    

Significant Other
Observable Inputs

(Level 2)

    

Significant
Other

Unobservable
Inputs

(Level 3)

     Total  

Assets:

              

Ameren(a)

   Derivative assets - commodity contracts(b):            
  

Fuel oils

   $ -       $ -       $ 64       $ 64   
  

Natural gas

     3         -         2         5   
  

Power

     -         17         86         103   
  

Uranium

     -         -         2         2   
   Nuclear Decommissioning Trust Fund(c):            
  

Cash and cash equivalents

     1         -         -         1   
  

Equity securities:

           
  

U.S. large capitalization

     228         -         -         228   
  

Debt securities:

           
  

Corporate bonds

     -         40         -         40   
  

Municipal bonds

     -         2         -         2   
  

U.S. treasury and agency securities

     -         50         -         50   
  

Asset-backed securities

     -         14         -         14   
    

Other

     -         1         -         1   

Ameren

   Derivative assets - commodity contracts(b):            

Missouri

  

Fuel oils

     -         -         37         37   
  

Natural gas

     -         -         1         1   
  

Power

     -         3         5         8   
  

Uranium

     -         -         2         2   
   Nuclear Decommissioning Trust Fund(c):            
  

Cash and cash equivalents

     1         -         -         1   
  

Equity securities:

           
  

U.S. large capitalization

     228         -         -         228   
  

Debt securities:

           
  

Corporate bonds

     -         40         -         40   
  

Municipal bonds

     -         2         -         2   
  

U.S. treasury and agency securities

     -         50         -         50   
  

Asset-backed securities

     -         14         -         14   
    

Other

     -         1         -         1   

Ameren

   Derivative assets - commodity contracts(b):            

Illinois

  

Natural gas

     -         -         2         2   
    

Power

     -         -         8         8   

Genco

   Derivative assets - commodity contracts(b):            
  

Fuel oils

     -         -         21         21   
  

Natural gas

     1         -         -         1   
    

Power

     -         -         11         11   

Liabilities:

              

Ameren(a)

   Derivative liabilities - commodity contracts(b):            
  

Fuel oils

   $ -       $ -       $ 13       $ 13   
  

Natural gas

     21         -         150         171   
    

Power

     -         19         50         69   

Ameren

   Derivative liabilities - commodity contracts(b):            

Missouri

  

Fuel oils

     -         -         7         7   
  

Natural gas

     9         -         15         24   
    

Power

     -         3         3         6   

Ameren

   Derivative liabilities - commodity contracts(b):            

Illinois

  

Natural gas

     7         -         136         143   
    

Power

     -         -         360         360   

Genco

   Derivative liabilities - commodity contracts(b):            
  

Fuel oils

     -         -         4         4   
  

Natural gas

     2         -         -         2   
    

Power

     -         -         8         8   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) The derivative asset and liability balances are presented net of counterparty credit considerations.
(c) Balance excludes $1 million of receivables, payables, and accrued income, net.

 

In January 2010, the FASB issued amended authoritative guidance regarding fair value measurements. This guidance required disclosures regarding significant transfers into and out of Level 1 and Level 2 fair value measurements. It also required information on purchases, sales, issuances, and settlements on a gross basis in the reconciliation of Level 3 fair value measurements. This guidance was effective for us as of January 1, 2010, with the exception of guidance applicable to detailed Level 3 reconciliation disclosures, which became effective for us as of January 1, 2011. The adoption of this guidance did not have a material impact on our results of operations, financial position, or liquidity because it provides enhanced disclosure requirements only.

The following table summarizes the changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy as of December 31, 2011:

 

      Net derivative commodity contracts  
      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(c)      Ameren  

Fuel oils:

              

Beginning balance at January 1, 2011

   $ 30       $ (a    $ 17       $ 4       $ 51   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         (a      12         4         16   

Included in regulatory assets/liabilities

     19         (a      (a      (a      19   

Total realized and unrealized gains (losses)

     19         (a      12         4         35   

Purchases

     4         (a      1         -         5   

Sales

     (1      (a      -         -         (1

Settlements

     (30      (a      (20      (6      (56

Transfers into Level 3

     -         (a      -         -         -   

Transfers out of Level 3

     (19      (a      (9      (2      (30

Ending balance at December 31, 2011

   $ 3       $ (a    $ 1       $ -       $ 4   

Change in unrealized gains (losses) related to assets/liabilities held at December 31,2011

   $ (11    $ (a    $ (5    $ (2    $ (18

Natural gas:

              

Beginning balance at January 1, 2011

   $ (14    $ (134    $ -       $ -       $ (148

Realized and unrealized gains (losses):

               $     

Included in regulatory assets/liabilities

     (8      (107      (a      (a      (115

Total realized and unrealized gains (losses)

     (8      (107      (a      (a    $ (115

Purchases

     -         1         -         -         1   

Sales

     -         (1      -         -         (1

Settlements

     8         81         -         -         89   

Ending balance at December 31, 2011

   $ (14    $ (160    $ -       $ -       $ (174

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ (6    $ (72    $ -       $ -       $ (78

Power:

              

Beginning balance at January 1, 2011

   $ 2       $ (352    $ 3       $ 383       $ 36   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         -         (1      (12      (13

Included in OCI

     -         -         -         24         24   

Included in regulatory assets/liabilities

     17         7         (a      51       $ 75   

Total realized and unrealized gains (losses)

     17         7         (1      63       $ 86   

Purchases

     30         -         -         35         65   

Sales

     (1      -         -         (21    $ (22

Settlements

     (27      205         (2      (225      (49

Transfers into Level 3

     (1      -         -         1         -   

Transfers out of Level 3

     1         -         -         (2      (1

Ending balance at December 31, 2011

   $ 21       $ (140    $ -       $ 234       $ 115   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ 1       $ 13       $ (1    $ 60       $ 73   

Uranium:

              

Beginning balance at January 1, 2011

   $ 2       $ (a    $ (a    $ (a    $ 2   

Realized and unrealized gains (losses):

              

Included in regulatory assets/liabilities

     (3      (a      (a      (a      (3

Total realized and unrealized gains (losses)

     (3      (a      (a      (a      (3

Purchases

     (1      (a      (a      (a      (1

Settlements

     1         (a      (a      (a      1   

Ending balance at December 31, 2011

   $ (1    $ (a    $ (a    $ (a    $ (1

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ -       $ (a    $ (a    $ (a    $ -   

 

(a) Not applicable.
(b) Net gains and losses on fuel oils and natural gas derivative commodity contracts are recorded in "Operating Expenses – Fuel", while net gains and losses on power derivative commodity contracts are recorded in "Operating Revenues – Electric."
(c) Includes amounts for Merchant Generation nonregistrant subsidiaries and intercompany eliminations.

 

The following table summarizes the changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy as of December 31, 2010:

 

      Net derivative commodity contracts  
      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(c)      Ameren  

Fuel oils:

              

Beginning balance at January 1, 2010

   $ 32       $ (a    $ 21       $ 7       $ 60   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         (a      3         (2      1   

Included in regulatory assets/liabilities

     8         (a      (a      (a      8   

Total realized and unrealized gains (losses)

     8         (a      3         (2      9   

Purchases

     18         (a      11         4         33   

Settlements

     (28      (a      (18      (5      (51

Ending balance at December 31, 2010

   $ 30       $ (a    $ 17       $ 4       $ 51   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 7       $ (a    $ 4       $ -       $ 11   

Natural gas:

              

Beginning balance at January 1, 2010

   $ (6    $ (61    $ -       $ -       $ (67

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         -         -         -         -   

Included in regulatory assets/liabilities

     (20      (152      (a      (a      (172

Total realized and unrealized gains (losses)

     (20      (152      -         -         (172

Purchases

     -         (5      -         -       $ (5

Settlements

     12         84         -         -         96   

Ending balance at December 31, 2010

   $ (14    $ (134    $ -       $ -       $ (148

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ (11    $ (82    $ -       $ 1       $ (92

Power:

              

Beginning balance at January 1, 2010

   $ (1    $ (422    $ 1       $ 460       $ 38   

Realized and unrealized gains (losses):

              

Included in earnings(b)

   $ -       $ -       $ 2       $ 32       $ 34   

Included in OCI

     -         -         -         8         8   

Included in regulatory assets/liabilities

     27         (107      (a      95         15   

Total realized and unrealized gains (losses)

     27         (107      2         135         57   

Purchases

     4         19         (10      26         39   

Sales

     2         -         12         (13      1   

Settlements

     (24      158         (2      (197      (65

Transfers into Level 3

     -         -         -         (2      (2

Transfers out of Level 3

     (6      -         -         (26      (32

Ending balance at December 31, 2010

   $ 2       $ (352    $ 3       $ 383       $ 36   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 1       $ (89    $ -       $ 81       $ (7

Uranium:

              

Beginning balance at January 1, 2010

   $ (2    $ (a    $ (a    $ (a    $ (2

Realized and unrealized gains (losses):

              

Included in regulatory assets/liabilities

     3         (a      (a      (a      3   

Total realized and unrealized gains (losses)

     3         (a      (a      (a    $ 3   

Settlements

     1         (a      (a      (a      1   

Ending balance at December 31, 2010

   $ 2       $ (a    $ (a    $ (a    $ 2   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 1       $ (a    $ (a    $ (a    $ 1   

 

(a) Not applicable.
(b) Net gains and losses on heating oil and natural gas derivative commodity contracts are recorded in Operating Expenses – Fuel, while net gains and losses on power derivative commodity contracts are recorded in Operating Revenues – Electric.
(c) Includes amounts for Merchant Generation nonregistrant subsidiaries and intercompany eliminations.

 

Transfers in or out of Level 3 represent either (1) existing assets and liabilities that were previously categorized as a higher level but were recategorized to Level 3 because the inputs to the model became unobservable during the period, or (2) existing assets and liabilities that were previously classified as Level 3 but were recategorized to a higher level because the lowest significant input became observable during the period. Transfers between Level 2 and Level 3 were primarily caused by changes in availability of financial power trades observable on electronic exchanges from the previous reporting period for the years ended December 31, 2011 and 2010. Any reclassifications are reported as transfers out of Level 3 at the fair value measurement reported at the beginning of the period in which the changes occur. For the years ended December 31, 2011 and 2010, there were no transfers between Level 1 and Level 2 related to derivative commodity contracts. The following table summarizes all transfers between fair value hierarchy levels related to derivative commodity contracts for the years ended December 31, 2011 and 2010:

 

      2011      2010  

Ameren - derivative commodity contracts:(a)

     

Transfers into Level 3 / Transfers out of Level 1

   $      $ (1

Transfers out of Level 3 / Transfers into Level 1

     (30      -   

Transfers into Level 3 / Transfers out of Level 2

     -         (1 )  

Transfers out of Level 3 / Transfers into Level 2

     (1      (32

Net fair value of Level 3 transfers

   $ (31    $ (34

Ameren Missouri – derivative commodity contracts:

     

Transfers out of Level 3 / Transfers into Level 1

     (19      -   

Transfers into Level 3 / Transfers out of Level 2

     (1      -   

Transfers out of Level 3 / Transfers into Level 2

   $ 1       $ (6

Net fair value of Level 3 transfers

   $ (19    $ (6

Genco – derivative commodity contracts:

     

Transfers out of Level 3 / Transfers into Level 1

   $ (9    $ -   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

See Note 11 – Retirement Benefits for the fair value hierarchy tables detailing Ameren's pension and postretirement plan assets as of December 31, 2011, as well as a table summarizing the changes in Level 3 plan assets during 2011.

The Ameren Companies' carrying amounts of cash and cash equivalents, accounts receivable, short-term borrowings, and accounts payable approximate fair value because of the short-term nature of these instruments. The estimated fair value of long-term debt and preferred stock is based on the quoted market prices for same or similar issues for companies with similar credit profiles or on the current rates offered to the Ameren Companies for similar financial instruments.

The following table presents the carrying amounts and estimated fair values of our long-term debt and preferred stock at December 31, 2011 and 2010:

 

      2011      2010  
      Carrying Amount      Fair Value      Carrying Amount      Fair Value  

Ameren:(a)(b)

           

Long-term debt and capital lease obligations (including current portion)

   $ 6,856       $ 7,800       $ 7,008       $ 7,661   

Preferred stock

     142         92         142         102   

Ameren Missouri:

           

Long-term debt and capital lease obligations (including current portion)

   $ 3,950       $ 4,541       $ 3,954       $ 4,281   

Preferred stock

     80         55         80         62   

Ameren Illinois:

           

Long-term debt (including current portion)

   $ 1,658       $ 1,943       $ 1,807       $ 2,067   

Preferred stock

     62         37         62         40   

Genco:

           

Long-term debt (including current portion)

   $ 824       $ 839       $ 824       $ 826   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Preferred stock along with the 20% noncontrolling interest of EEI is recorded in Noncontrolling Interests on the balance sheet.

NOTE 8 – FAIR VALUE MEASUREMENTS

Fair value is defined as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. We use various methods to determine fair value, including market, income, and cost approaches. With these approaches, we adopt certain assumptions that market participants would use in pricing the asset or liability, including assumptions about market risk or the risks inherent in the inputs to the valuation. Inputs to valuation can be readily observable, market-corroborated, or unobservable. We use valuation techniques that maximize the use of observable inputs and minimize the use of unobservable inputs. Authoritative accounting guidance established a fair value hierarchy that prioritizes the inputs used to measure fair value. All financial assets and liabilities carried at fair value are classified and disclosed in one of the following three hierarchy levels:

Level 1: Inputs based on quoted prices in active markets for identical assets or liabilities. Level 1 assets and liabilities are primarily exchange-traded derivatives and assets, including cash and cash equivalents and listed equity securities, such as those held in Ameren Missouri's Nuclear Decommissioning Trust Fund.

Level 2: Market-based inputs corroborated by third-party brokers or exchanges based on transacted market data. Level 2 assets and liabilities include certain assets held in Ameren Missouri's Nuclear Decommissioning Trust Fund, including corporate bonds and other fixed-income securities, U.S. treasury and agency securities, and certain over-the-counter derivative instruments, including natural gas swaps and financial power transactions. Derivative instruments classified as Level 2 are valued by corroborated observable inputs, such as pricing services or prices from similar instruments that trade in liquid markets. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. To derive our forward view to price our derivative instruments at fair value, we average the midpoints of the bid/ask spreads. To validate forward prices obtained from outside parties, we compare the pricing to recently settled market transactions. Additionally, a review of all sources is performed to identify any anomalies or potential errors. Further, we consider the volume of transactions on certain trading platforms in our reasonableness assessment of the averaged midpoint.

Level 3: Unobservable inputs that are not corroborated by market data. Level 3 assets and liabilities are valued by internally developed models and assumptions or methodologies that use significant unobservable inputs. Level 3 assets and liabilities include derivative instruments that trade in less liquid markets, where pricing is largely unobservable, including the financial contracts entered into between Ameren Illinois and Marketing Company. We value Level 3 instruments by using pricing models with inputs that are often unobservable in the market, as well as certain internal assumptions. Our development and corroboration process entails obtaining multiple quotes or prices from outside sources. As a part of our reasonableness review, an evaluation of all sources is performed to identify any anomalies or potential errors.

We perform an analysis each quarter to determine the appropriate hierarchy level of the assets and liabilities subject to fair value measurements. Financial assets and liabilities are classified in their entirety according to the lowest level of input that is significant to the fair value measurement. All assets and liabilities whose fair value measurement is based on significant unobservable inputs are classified as Level 3.

In accordance with applicable authoritative accounting guidance, we consider nonperformance risk in our valuation of derivative instruments by analyzing the credit standing of our counterparties and considering any counterparty credit enhancements (e.g., collateral). The guidance also requires that the fair value measurement of liabilities reflect the nonperformance risk of the reporting entity, as applicable. Therefore, we have factored the impact of our credit standing as well as any potential credit enhancements into the fair value measurement of both derivative assets and derivative liabilities. Included in our valuation, and based on current market conditions, is a valuation adjustment for counterparty default derived from market data such as the price of credit default swaps, bond yields, and credit ratings. Ameren recorded net losses of $2 million, net gains of less than $1 million, and net losses of less than $1 million in 2011, 2010 and 2009, respectively, related to valuation adjustments for counterparty default risk. Genco recorded net losses of less than $1 million, net gains of less than $1 million, and net gains of less than $1 million in 2011, 2010, and 2009, respectively, related to valuation adjustments for counterparty default risk. At December 31, 2011, the counterparty default risk (asset)/liability valuation adjustment related to derivative contracts totaled $1 million, less than $1 million, $19 million, and less than $(1) million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. At December 31, 2010, the counterparty default risk liability valuation adjustment related to derivative contracts totaled $2 million, less than $1 million, $21 million, and less than $1 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2011:

 

           

Quoted Prices in

Active Markets for
Identical Assets

or Liabilities

(Level 1)

    

Significant Other
Observable
Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

       Total  

Assets:

                

Ameren(a)

   Derivative assets - commodity contracts(b):              
  

Fuel oils

   $ 33       $ -       $ 4         $ 37   
  

Natural gas

     4         -         2           6   
  

Power

     -         2         193           195   
   Nuclear Decommissioning Trust Fund(c):              
  

Cash and cash equivalents

     3         -         -           3   
  

Equity securities:

             
  

U.S. large capitalization

     234         -         -           234   
  

Debt securities:

             
  

Corporate bonds

     -         44         -           44   
  

Municipal bonds

     -         1         -           1   
  

U.S. treasury and agency securities

     -         65         -           65   
  

Asset-backed securities

     -         10         -           10   
    

Other

     -         1         -           1   

Ameren

   Derivative assets - commodity contracts(b):              

Missouri

  

Fuel oils

     20         -         3           23   
  

Natural gas

     2         -         -           2   
  

Power

     -         1         29           30   
   Nuclear Decommissioning Trust Fund(c):              
  

Cash and cash equivalents

     3         -         -           3   
  

Equity securities:

             
  

U.S. large capitalization

     234         -         -           234   
  

Debt securities:

             
  

Corporate bonds

     -         44         -           44   
  

Municipal bonds

     -         1         -           1   
  

U.S. treasury and agency securities

     -         65         -           65   
  

Asset-backed securities

     -         10         -           10   
    

Other

     -         1         -           1   

Ameren

   Derivative assets - commodity contracts(b):              

Illinois

  

Natural gas

     -         -         2           2   
    

Power

     -         -         77           77   

Genco

   Derivative assets - commodity contracts(b):              
  

Fuel oils

     10         -         1           11   
    

Natural gas

     2         -         -           2   

Liabilities:

                

Ameren(a)

   Derivative liabilities - commodity contracts(b):              
  

Fuel oils

   $ 2       $ -       $ -         $ 2   
  

Natural gas

     22         -         176           198   
  

Power

     -         2         78           80   
    

Uranium

     -         -         1           1   

Ameren

   Derivative liabilities - commodity contracts(b):              

Missouri

  

Fuel oils

     1         -         -           1   
  

Natural gas

     12         -         14           26   
  

Power

     -         1         8           9   
    

Uranium

     -         -         1           1   

Ameren

   Derivative liabilities - commodity contracts(b):              

Illinois

  

Natural gas

     7         -         162           169   
    

Power

     -         -         217           217   

Genco

   Derivative liabilities - commodity contracts(b):              
  

Fuel oils

     1         -         -           1   
    

Natural gas

     2         -         -           2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) The derivative asset and liability balances are presented net of counterparty credit considerations.
(c) Balance excludes $(1) million of receivables, payables, and accrued income, net.

 

The following table sets forth, by level within the fair value hierarchy, our assets and liabilities measured at fair value on a recurring basis as of December 31, 2010:

 

           

Quoted Prices in

Active Markets for
Identical Assets

or Liabilities

(Level 1)

    

Significant Other
Observable Inputs

(Level 2)

    

Significant
Other

Unobservable
Inputs

(Level 3)

     Total  

Assets:

              

Ameren(a)

   Derivative assets - commodity contracts(b):            
  

Fuel oils

   $ -       $ -       $ 64       $ 64   
  

Natural gas

     3         -         2         5   
  

Power

     -         17         86         103   
  

Uranium

     -         -         2         2   
   Nuclear Decommissioning Trust Fund(c):            
  

Cash and cash equivalents

     1         -         -         1   
  

Equity securities:

           
  

U.S. large capitalization

     228         -         -         228   
  

Debt securities:

           
  

Corporate bonds

     -         40         -         40   
  

Municipal bonds

     -         2         -         2   
  

U.S. treasury and agency securities

     -         50         -         50   
  

Asset-backed securities

     -         14         -         14   
    

Other

     -         1         -         1   

Ameren

   Derivative assets - commodity contracts(b):            

Missouri

  

Fuel oils

     -         -         37         37   
  

Natural gas

     -         -         1         1   
  

Power

     -         3         5         8   
  

Uranium

     -         -         2         2   
   Nuclear Decommissioning Trust Fund(c):            
  

Cash and cash equivalents

     1         -         -         1   
  

Equity securities:

           
  

U.S. large capitalization

     228         -         -         228   
  

Debt securities:

           
  

Corporate bonds

     -         40         -         40   
  

Municipal bonds

     -         2         -         2   
  

U.S. treasury and agency securities

     -         50         -         50   
  

Asset-backed securities

     -         14         -         14   
    

Other

     -         1         -         1   

Ameren

   Derivative assets - commodity contracts(b):            

Illinois

  

Natural gas

     -         -         2         2   
    

Power

     -         -         8         8   

Genco

   Derivative assets - commodity contracts(b):            
  

Fuel oils

     -         -         21         21   
  

Natural gas

     1         -         -         1   
    

Power

     -         -         11         11   

Liabilities:

              

Ameren(a)

   Derivative liabilities - commodity contracts(b):            
  

Fuel oils

   $ -       $ -       $ 13       $ 13   
  

Natural gas

     21         -         150         171   
    

Power

     -         19         50         69   

Ameren

   Derivative liabilities - commodity contracts(b):            

Missouri

  

Fuel oils

     -         -         7         7   
  

Natural gas

     9         -         15         24   
    

Power

     -         3         3         6   

Ameren

   Derivative liabilities - commodity contracts(b):            

Illinois

  

Natural gas

     7         -         136         143   
    

Power

     -         -         360         360   

Genco

   Derivative liabilities - commodity contracts(b):            
  

Fuel oils

     -         -         4         4   
  

Natural gas

     2         -         -         2   
    

Power

     -         -         8         8   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) The derivative asset and liability balances are presented net of counterparty credit considerations.
(c) Balance excludes $1 million of receivables, payables, and accrued income, net.

 

In January 2010, the FASB issued amended authoritative guidance regarding fair value measurements. This guidance required disclosures regarding significant transfers into and out of Level 1 and Level 2 fair value measurements. It also required information on purchases, sales, issuances, and settlements on a gross basis in the reconciliation of Level 3 fair value measurements. This guidance was effective for us as of January 1, 2010, with the exception of guidance applicable to detailed Level 3 reconciliation disclosures, which became effective for us as of January 1, 2011. The adoption of this guidance did not have a material impact on our results of operations, financial position, or liquidity because it provides enhanced disclosure requirements only.

The following table summarizes the changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy as of December 31, 2011:

 

      Net derivative commodity contracts  
      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(c)      Ameren  

Fuel oils:

              

Beginning balance at January 1, 2011

   $ 30       $ (a    $ 17       $ 4       $ 51   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         (a      12         4         16   

Included in regulatory assets/liabilities

     19         (a      (a      (a      19   

Total realized and unrealized gains (losses)

     19         (a      12         4         35   

Purchases

     4         (a      1         -         5   

Sales

     (1      (a      -         -         (1

Settlements

     (30      (a      (20      (6      (56

Transfers into Level 3

     -         (a      -         -         -   

Transfers out of Level 3

     (19      (a      (9      (2      (30

Ending balance at December 31, 2011

   $ 3       $ (a    $ 1       $ -       $ 4   

Change in unrealized gains (losses) related to assets/liabilities held at December 31,2011

   $ (11    $ (a    $ (5    $ (2    $ (18

Natural gas:

              

Beginning balance at January 1, 2011

   $ (14    $ (134    $ -       $ -       $ (148

Realized and unrealized gains (losses):

               $     

Included in regulatory assets/liabilities

     (8      (107      (a      (a      (115

Total realized and unrealized gains (losses)

     (8      (107      (a      (a    $ (115

Purchases

     -         1         -         -         1   

Sales

     -         (1      -         -         (1

Settlements

     8         81         -         -         89   

Ending balance at December 31, 2011

   $ (14    $ (160    $ -       $ -       $ (174

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ (6    $ (72    $ -       $ -       $ (78

Power:

              

Beginning balance at January 1, 2011

   $ 2       $ (352    $ 3       $ 383       $ 36   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         -         (1      (12      (13

Included in OCI

     -         -         -         24         24   

Included in regulatory assets/liabilities

     17         7         (a      51       $ 75   

Total realized and unrealized gains (losses)

     17         7         (1      63       $ 86   

Purchases

     30         -         -         35         65   

Sales

     (1      -         -         (21    $ (22

Settlements

     (27      205         (2      (225      (49

Transfers into Level 3

     (1      -         -         1         -   

Transfers out of Level 3

     1         -         -         (2      (1

Ending balance at December 31, 2011

   $ 21       $ (140    $ -       $ 234       $ 115   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ 1       $ 13       $ (1    $ 60       $ 73   

Uranium:

              

Beginning balance at January 1, 2011

   $ 2       $ (a    $ (a    $ (a    $ 2   

Realized and unrealized gains (losses):

              

Included in regulatory assets/liabilities

     (3      (a      (a      (a      (3

Total realized and unrealized gains (losses)

     (3      (a      (a      (a      (3

Purchases

     (1      (a      (a      (a      (1

Settlements

     1         (a      (a      (a      1   

Ending balance at December 31, 2011

   $ (1    $ (a    $ (a    $ (a    $ (1

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2011

   $ -       $ (a    $ (a    $ (a    $ -   

 

(a) Not applicable.
(b) Net gains and losses on fuel oils and natural gas derivative commodity contracts are recorded in "Operating Expenses – Fuel", while net gains and losses on power derivative commodity contracts are recorded in "Operating Revenues – Electric."
(c) Includes amounts for Merchant Generation nonregistrant subsidiaries and intercompany eliminations.

 

The following table summarizes the changes in the fair value of financial assets and liabilities classified as Level 3 in the fair value hierarchy as of December 31, 2010:

 

      Net derivative commodity contracts  
      Ameren
Missouri
     Ameren
Illinois
     Genco      Other(c)      Ameren  

Fuel oils:

              

Beginning balance at January 1, 2010

   $ 32       $ (a    $ 21       $ 7       $ 60   

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         (a      3         (2      1   

Included in regulatory assets/liabilities

     8         (a      (a      (a      8   

Total realized and unrealized gains (losses)

     8         (a      3         (2      9   

Purchases

     18         (a      11         4         33   

Settlements

     (28      (a      (18      (5      (51

Ending balance at December 31, 2010

   $ 30       $ (a    $ 17       $ 4       $ 51   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 7       $ (a    $ 4       $ -       $ 11   

Natural gas:

              

Beginning balance at January 1, 2010

   $ (6    $ (61    $ -       $ -       $ (67

Realized and unrealized gains (losses):

              

Included in earnings(b)

     -         -         -         -         -   

Included in regulatory assets/liabilities

     (20      (152      (a      (a      (172

Total realized and unrealized gains (losses)

     (20      (152      -         -         (172

Purchases

     -         (5      -         -       $ (5

Settlements

     12         84         -         -         96   

Ending balance at December 31, 2010

   $ (14    $ (134    $ -       $ -       $ (148

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ (11    $ (82    $ -       $ 1       $ (92

Power:

              

Beginning balance at January 1, 2010

   $ (1    $ (422    $ 1       $ 460       $ 38   

Realized and unrealized gains (losses):

              

Included in earnings(b)

   $ -       $ -       $ 2       $ 32       $ 34   

Included in OCI

     -         -         -         8         8   

Included in regulatory assets/liabilities

     27         (107      (a      95         15   

Total realized and unrealized gains (losses)

     27         (107      2         135         57   

Purchases

     4         19         (10      26         39   

Sales

     2         -         12         (13      1   

Settlements

     (24      158         (2      (197      (65

Transfers into Level 3

     -         -         -         (2      (2

Transfers out of Level 3

     (6      -         -         (26      (32

Ending balance at December 31, 2010

   $ 2       $ (352    $ 3       $ 383       $ 36   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 1       $ (89    $ -       $ 81       $ (7

Uranium:

              

Beginning balance at January 1, 2010

   $ (2    $ (a    $ (a    $ (a    $ (2

Realized and unrealized gains (losses):

              

Included in regulatory assets/liabilities

     3         (a      (a      (a      3   

Total realized and unrealized gains (losses)

     3         (a      (a      (a    $ 3   

Settlements

     1         (a      (a      (a      1   

Ending balance at December 31, 2010

   $ 2       $ (a    $ (a    $ (a    $ 2   

Change in unrealized gains (losses) related to assets/liabilities held at December 31, 2010

   $ 1       $ (a    $ (a    $ (a    $ 1   

 

(a) Not applicable.
(b) Net gains and losses on heating oil and natural gas derivative commodity contracts are recorded in Operating Expenses – Fuel, while net gains and losses on power derivative commodity contracts are recorded in Operating Revenues – Electric.
(c) Includes amounts for Merchant Generation nonregistrant subsidiaries and intercompany eliminations.

 

Transfers in or out of Level 3 represent either (1) existing assets and liabilities that were previously categorized as a higher level but were recategorized to Level 3 because the inputs to the model became unobservable during the period, or (2) existing assets and liabilities that were previously classified as Level 3 but were recategorized to a higher level because the lowest significant input became observable during the period. Transfers between Level 2 and Level 3 were primarily caused by changes in availability of financial power trades observable on electronic exchanges from the previous reporting period for the years ended December 31, 2011 and 2010. Any reclassifications are reported as transfers out of Level 3 at the fair value measurement reported at the beginning of the period in which the changes occur. For the years ended December 31, 2011 and 2010, there were no transfers between Level 1 and Level 2 related to derivative commodity contracts. The following table summarizes all transfers between fair value hierarchy levels related to derivative commodity contracts for the years ended December 31, 2011 and 2010:

 

      2011      2010  

Ameren - derivative commodity contracts:(a)

     

Transfers into Level 3 / Transfers out of Level 1

   $      $ (1

Transfers out of Level 3 / Transfers into Level 1

     (30      -   

Transfers into Level 3 / Transfers out of Level 2

     -         (1 )  

Transfers out of Level 3 / Transfers into Level 2

     (1      (32

Net fair value of Level 3 transfers

   $ (31    $ (34

Ameren Missouri – derivative commodity contracts:

     

Transfers out of Level 3 / Transfers into Level 1

     (19      -   

Transfers into Level 3 / Transfers out of Level 2

     (1      -   

Transfers out of Level 3 / Transfers into Level 2

   $ 1       $ (6

Net fair value of Level 3 transfers

   $ (19    $ (6

Genco – derivative commodity contracts:

     

Transfers out of Level 3 / Transfers into Level 1

   $ (9    $ -   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

See Note 11 – Retirement Benefits for the fair value hierarchy tables detailing Ameren's pension and postretirement plan assets as of December 31, 2011, as well as a table summarizing the changes in Level 3 plan assets during 2011.

The Ameren Companies' carrying amounts of cash and cash equivalents, accounts receivable, short-term borrowings, and accounts payable approximate fair value because of the short-term nature of these instruments. The estimated fair value of long-term debt and preferred stock is based on the quoted market prices for same or similar issues for companies with similar credit profiles or on the current rates offered to the Ameren Companies for similar financial instruments.

The following table presents the carrying amounts and estimated fair values of our long-term debt and preferred stock at December 31, 2011 and 2010:

 

      2011      2010  
      Carrying Amount      Fair Value      Carrying Amount      Fair Value  

Ameren:(a)(b)

           

Long-term debt and capital lease obligations (including current portion)

   $ 6,856       $ 7,800       $ 7,008       $ 7,661   

Preferred stock

     142         92         142         102   

Ameren Missouri:

           

Long-term debt and capital lease obligations (including current portion)

   $ 3,950       $ 4,541       $ 3,954       $ 4,281   

Preferred stock

     80         55         80         62   

Ameren Illinois:

           

Long-term debt (including current portion)

   $ 1,658       $ 1,943       $ 1,807       $ 2,067   

Preferred stock

     62         37         62         40   

Genco:

           

Long-term debt (including current portion)

   $ 824       $ 839       $ 824       $ 826   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Preferred stock along with the 20% noncontrolling interest of EEI is recorded in Noncontrolling Interests on the balance sheet.
Nuclear Decommissioning Trust Fund Investments

NOTE 9 – NUCLEAR DECOMMISSIONING TRUST FUND INVESTMENTS

Ameren Missouri has investments in debt and equity securities that are held in a trust fund for the purpose of funding the decommissioning of its Callaway energy center. See Note 10 – Callaway Energy Center for additional information. We have classified these investments as available for sale, and we have recorded all such investments at their fair market value at December 31, 2011, and 2010.

Investments in the nuclear decommissioning trust fund have a target allocation of 60% to 70% in equity securities, with the balance invested in debt securities.

 

The following table presents proceeds from the sale of investments in Ameren Missouri's nuclear decommissioning trust fund and the gross realized gains and losses resulting from those sales for the years ended December 31, 2011, 2010, and 2009:

 

     2011      2010      2009  

Proceeds from sales

   $ 199       $ 256       $ 380   

Gross realized gains

     5         5         5   

Gross realized losses

     4         4         10   

Net realized and unrealized gains and losses are deferred and recorded as regulatory assets or regulatory liabilities on Ameren's and Ameren Missouri's balance sheets. This reporting is consistent with the method used to account for the decommissioning costs recovered in rates. Gains or losses associated with assets in the trust fund could result in lower or higher funding requirements for decommissioning costs, which are expected to be reflected in electric rates paid by Ameren Missouri's customers. See Note 2 – Rate and Regulatory Matters.

 

The following table presents the costs and fair values of investments in debt and equity securities in Ameren Missouri's nuclear decommissioning trust fund at December 31, 2011 and 2010:

 

 

The following table presents the costs and fair values of investments in debt securities in Ameren Missouri's nuclear decommissioning trust fund according to their contractual maturities at December 31, 2011:

 

     Cost      Fair Value  

Less than 5 years

   $ 57       $ 59   

5 years to 10 years

     34         36   

Due after 10 years

     23         26   
  

 

 

    

 

 

 

Total

   $ 114       $ 121   
  

 

 

    

 

 

 

We have unrealized losses relating to certain available-for-sale investments included in our decommissioning trust fund, recorded as regulatory assets as discussed above. Decommissioning will not occur until the operating license for our nuclear facility expires. Ameren Missouri submitted a license extension application to the NRC to extend the Callaway energy center's operating license to 2044. The following table presents the fair value and the gross unrealized losses of the available-for-sale securities held in Ameren Missouri's nuclear decommissioning trust fund. They are aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position at December 31, 2011:

 

NOTE 9 – NUCLEAR DECOMMISSIONING TRUST FUND INVESTMENTS

Ameren Missouri has investments in debt and equity securities that are held in a trust fund for the purpose of funding the decommissioning of its Callaway energy center. See Note 10 – Callaway Energy Center for additional information. We have classified these investments as available for sale, and we have recorded all such investments at their fair market value at December 31, 2011, and 2010.

Investments in the nuclear decommissioning trust fund have a target allocation of 60% to 70% in equity securities, with the balance invested in debt securities.

 

The following table presents proceeds from the sale of investments in Ameren Missouri's nuclear decommissioning trust fund and the gross realized gains and losses resulting from those sales for the years ended December 31, 2011, 2010, and 2009:

 

     2011      2010      2009  

Proceeds from sales

   $ 199       $ 256       $ 380   

Gross realized gains

     5         5         5   

Gross realized losses

     4         4         10   

Net realized and unrealized gains and losses are deferred and recorded as regulatory assets or regulatory liabilities on Ameren's and Ameren Missouri's balance sheets. This reporting is consistent with the method used to account for the decommissioning costs recovered in rates. Gains or losses associated with assets in the trust fund could result in lower or higher funding requirements for decommissioning costs, which are expected to be reflected in electric rates paid by Ameren Missouri's customers. See Note 2 – Rate and Regulatory Matters.

 

The following table presents the costs and fair values of investments in debt and equity securities in Ameren Missouri's nuclear decommissioning trust fund at December 31, 2011 and 2010:

 

Security Type

   Cost     Gross
Unrealized
Gain
     Gross
Unrealized
Loss
    Fair Value  

2011:

         

Debt securities

   $ 114      $ 7       $ (a   $ 121   

Equity securities

     145        101         12        234   

Cash

     3        —           —          3   

Other(b)

     (1     —           —          (1
  

 

 

   

 

 

    

 

 

   

 

 

 

Total

   $ 261      $ 108       $ 12      $ 357   
  

 

 

   

 

 

    

 

 

   

 

 

 

2010:

         

Debt securities

   $ 104      $ 4       $ 1      $ 107   

Equity securities

     141        95         8        228   

Cash

     1        —           —          1   

Other(b)

     1        —           —          1   
  

 

 

   

 

 

    

 

 

   

 

 

 

Total

   $ 247      $ 99       $ 9      $ 337   
  

 

 

   

 

 

    

 

 

   

 

 

 

 

(a) Amount less than $1 million.
(b) Represents payables relating to pending security purchases, net of receivables related to pending securities sales and interest receivables.

 

The following table presents the costs and fair values of investments in debt securities in Ameren Missouri's nuclear decommissioning trust fund according to their contractual maturities at December 31, 2011:

 

     Cost      Fair Value  

Less than 5 years

   $ 57       $ 59   

5 years to 10 years

     34         36   

Due after 10 years

     23         26   
  

 

 

    

 

 

 

Total

   $ 114       $ 121   
  

 

 

    

 

 

 

We have unrealized losses relating to certain available-for-sale investments included in our decommissioning trust fund, recorded as regulatory assets as discussed above. Decommissioning will not occur until the operating license for our nuclear facility expires. Ameren Missouri submitted a license extension application to the NRC to extend the Callaway energy center's operating license to 2044. The following table presents the fair value and the gross unrealized losses of the available-for-sale securities held in Ameren Missouri's nuclear decommissioning trust fund. They are aggregated by investment category and the length of time that individual securities have been in a continuous unrealized loss position at December 31, 2011:

 

     Less than 12 Months     12 Months or Greater     Total  
     Fair Value      Gross
Unrealized
Losses
    Fair Value     Gross
Unrealized

Losses
    Fair Value      Gross
Unrealized

Losses
 

Debt securities

   $ 7       $ (a   $ (a   $ (a   $ 7       $ (a

Equity securities

     18         4        8        8        26         12   
  

 

 

    

 

 

   

 

 

   

 

 

   

 

 

    

 

 

 

Total

   $ 25       $ 4      $ 8      $ 8      $ 33       $ 12   
  

 

 

    

 

 

   

 

 

   

 

 

   

 

 

    

 

 

 

 

(a) Amount less than $1 million.
Callaway Energy Center

NOTE 10 – CALLAWAY ENERGY CENTER

Under the NWPA, the DOE is responsible for disposing of spent nuclear fuel from the Callaway energy center and other commercial nuclear power plants. Under the NWPA, Ameren and other utilities who own and operate those plants are responsible for paying the disposal costs. The NWPA established the fee that these utilities pay the federal government for disposing of the spent nuclear fuel at one mill, or one-tenth of one cent, for each kilowatt hour generated by those plants and sold. The NWPA also requires the DOE to review the nuclear waste fee against the cost of the nuclear waste disposal program and to propose to the United States Congress any fee adjustment necessary to offset the costs of the program. As required by the NWPA, Ameren and other utilities have entered into standard contracts with the federal government. The government, represented by the DOE, implements these provisions of the NWPA. Consistent with the NWPA and its contract, Ameren Missouri collects one mill from its electric customers for each kilowatt hour of electricity that it generates and sells from its Callaway energy center.

Although both the NWPA and the standard contract stated that the federal government would begin to dispose of spent nuclear fuel by 1998, the federal government has acknowledged since at least 1994 that it would not meet that deadline. The federal government is not currently predicting when it will begin to meet its disposal obligation. Ameren Missouri has sufficient installed capacity at its Callaway energy center to store the spent nuclear fuel generated at Callaway through 2020 and has the capability for additional storage capacity for spent nuclear fuel generated through the end of the energy center's current licensed life.

Until January 2009, the DOE program provided for spent nuclear fuel disposal to take place at a geologic repository to be constructed at Yucca Mountain, Nevada. In January 2009, the Obama administration announced that a repository at Yucca Mountain was unworkable and took steps to terminate the Yucca Mountain program, while acknowledging the federal government's continuing obligation to dispose of utilities' spent nuclear fuel. In January 2012, an advisory commission established by the DOE issued its report of recommendations for the storage and disposal of spent nuclear fuel. The recommendations covered topics such as the approach to siting future nuclear waste management facilities, the transport and storage of spent fuel and high-level waste, options for waste disposal, institutional arrangements for managing spent nuclear fuel and high-level wastes, and changes needed in the handling of nuclear waste fees and of the Nuclear Waste Fund. Most of these recommendations require action by the DOE and the United States Congress.

In view of the federal government's efforts to terminate the Yucca Mountain program, the Nuclear Energy Institute, a number of individual utilities, and the National Association of Regulatory Utility Commissioners sued the DOE in the United States Court of Appeals for the District of Columbia Circuit seeking the suspension of the one mill nuclear waste fee. They allege that the DOE's failure to undertake an appropriate fee adequacy review reflects the current unsettled state of the nuclear waste program. That case is pending. The DOE delay in carrying out its obligation to dispose of spent nuclear fuel from the Callaway energy center is not expected to adversely affect the continued operation of the energy center.

As a result of DOE's failure to build a repository for nuclear waste or otherwise fulfill its contract obligations, Ameren Missouri and other nuclear power plant owners have also sued DOE to recover costs incurred for ongoing storage of their spent fuel. Ameren Missouri filed a breach of contract suit in 2004 to recover $13 million in costs that it incurred through 2009. This amount included the cost of reracking the Callaway energy center's spent fuel pool, as well as certain NRC fees, and Missouri ad valorem taxes that Ameren Missouri would not have incurred had DOE performed its contractual obligations. In June 2011, the parties reached a settlement that included a payment to Ameren Missouri of $11 million for spent fuel storage and related costs through 2010 and, thereafter, annual payment of such costs after they are incurred through 2013 or any other mutually agreed extension. As a result of this settlement agreement, Ameren Missouri recorded a pretax reduction of $2 million and $2 million to its "Operating Expenses – Depreciation and amortization" and "Operating Expenses – Other operations and maintenance" expense line items, respectively, on its statement of income for the year ended December 31, 2011. Ameren Missouri reduced its property and plant assets by $7 million. Under the settlement, Ameren Missouri's 2004 breach of contract suit was dismissed in July 2011.

In December 2011, Ameren Missouri submitted a license extension application with the NRC to extend its Callaway energy center's operating license from 2024 to 2044. There is no date by which the NRC must act in this relicensing request. If the Callaway energy center's license is extended, additional spent fuel storage will be required. Ameren Missouri plans to install a dry spent fuel storage facility at its Callaway energy center and intends to begin transferring spent fuel assemblies to this facility by 2020.

Electric utility rates charged to customers provide for the recovery of the Callaway energy center's decommissioning costs, which include decontamination, dismantling, and site restoration costs, over an assumed 40-year life of the nuclear center, ending with the expiration of the energy center's current operating license in 2024. It is assumed that the Callaway energy center site will be decommissioned through the immediate dismantlement method and removed from service. Ameren and Ameren Missouri have recorded an ARO for the Callaway energy center decommissioning costs at fair value, which represents the present value of estimated future cash outflows. Decommissioning costs are included in the costs of service used to establish electric rates for Ameren Missouri's customers. These costs amounted to $7 million in each of the years 2011, 2010, and 2009. Every three years, the MoPSC requires Ameren Missouri to file an updated cost study for decommissioning its Callaway energy center. Electric rates may be adjusted at such times to reflect changed estimates. This cost study was filed with the MoPSC in September 2011. After considering the results of this updated cost study and associated financial analysis, Ameren Missouri recommended to the MoPSC that the current rate of deposits to the trust fund continues to be appropriate and does not need to be changed. Amounts collected from customers are deposited in an external trust fund to provide for the Callaway energy center's decommissioning. If the assumed return on trust assets is not earned, we believe that it is probable that any such earnings deficiency will be recovered in rates. The fair value of the nuclear decommissioning trust fund for Ameren Missouri's Callaway energy center is reported as "Nuclear decommissioning trust fund" in Ameren's consolidated balance sheet and Ameren Missouri's balance sheet. This amount is legally restricted and may be used only to fund the costs of nuclear decommissioning. Changes in the fair value of the trust fund are recorded as an increase or decrease to the nuclear decommissioning trust fund, with an offsetting adjustment to the related regulatory asset or regulatory liability.

NOTE 10 – CALLAWAY ENERGY CENTER

Under the NWPA, the DOE is responsible for disposing of spent nuclear fuel from the Callaway energy center and other commercial nuclear power plants. Under the NWPA, Ameren and other utilities who own and operate those plants are responsible for paying the disposal costs. The NWPA established the fee that these utilities pay the federal government for disposing of the spent nuclear fuel at one mill, or one-tenth of one cent, for each kilowatt hour generated by those plants and sold. The NWPA also requires the DOE to review the nuclear waste fee against the cost of the nuclear waste disposal program and to propose to the United States Congress any fee adjustment necessary to offset the costs of the program. As required by the NWPA, Ameren and other utilities have entered into standard contracts with the federal government. The government, represented by the DOE, implements these provisions of the NWPA. Consistent with the NWPA and its contract, Ameren Missouri collects one mill from its electric customers for each kilowatt hour of electricity that it generates and sells from its Callaway energy center.

Although both the NWPA and the standard contract stated that the federal government would begin to dispose of spent nuclear fuel by 1998, the federal government has acknowledged since at least 1994 that it would not meet that deadline. The federal government is not currently predicting when it will begin to meet its disposal obligation. Ameren Missouri has sufficient installed capacity at its Callaway energy center to store the spent nuclear fuel generated at Callaway through 2020 and has the capability for additional storage capacity for spent nuclear fuel generated through the end of the energy center's current licensed life.

Until January 2009, the DOE program provided for spent nuclear fuel disposal to take place at a geologic repository to be constructed at Yucca Mountain, Nevada. In January 2009, the Obama administration announced that a repository at Yucca Mountain was unworkable and took steps to terminate the Yucca Mountain program, while acknowledging the federal government's continuing obligation to dispose of utilities' spent nuclear fuel. In January 2012, an advisory commission established by the DOE issued its report of recommendations for the storage and disposal of spent nuclear fuel. The recommendations covered topics such as the approach to siting future nuclear waste management facilities, the transport and storage of spent fuel and high-level waste, options for waste disposal, institutional arrangements for managing spent nuclear fuel and high-level wastes, and changes needed in the handling of nuclear waste fees and of the Nuclear Waste Fund. Most of these recommendations require action by the DOE and the United States Congress.

In view of the federal government's efforts to terminate the Yucca Mountain program, the Nuclear Energy Institute, a number of individual utilities, and the National Association of Regulatory Utility Commissioners sued the DOE in the United States Court of Appeals for the District of Columbia Circuit seeking the suspension of the one mill nuclear waste fee. They allege that the DOE's failure to undertake an appropriate fee adequacy review reflects the current unsettled state of the nuclear waste program. That case is pending. The DOE delay in carrying out its obligation to dispose of spent nuclear fuel from the Callaway energy center is not expected to adversely affect the continued operation of the energy center.

As a result of DOE's failure to build a repository for nuclear waste or otherwise fulfill its contract obligations, Ameren Missouri and other nuclear power plant owners have also sued DOE to recover costs incurred for ongoing storage of their spent fuel. Ameren Missouri filed a breach of contract suit in 2004 to recover $13 million in costs that it incurred through 2009. This amount included the cost of reracking the Callaway energy center's spent fuel pool, as well as certain NRC fees, and Missouri ad valorem taxes that Ameren Missouri would not have incurred had DOE performed its contractual obligations. In June 2011, the parties reached a settlement that included a payment to Ameren Missouri of $11 million for spent fuel storage and related costs through 2010 and, thereafter, annual payment of such costs after they are incurred through 2013 or any other mutually agreed extension. As a result of this settlement agreement, Ameren Missouri recorded a pretax reduction of $2 million and $2 million to its "Operating Expenses – Depreciation and amortization" and "Operating Expenses – Other operations and maintenance" expense line items, respectively, on its statement of income for the year ended December 31, 2011. Ameren Missouri reduced its property and plant assets by $7 million. Under the settlement, Ameren Missouri's 2004 breach of contract suit was dismissed in July 2011.

In December 2011, Ameren Missouri submitted a license extension application with the NRC to extend its Callaway energy center's operating license from 2024 to 2044. There is no date by which the NRC must act in this relicensing request. If the Callaway energy center's license is extended, additional spent fuel storage will be required. Ameren Missouri plans to install a dry spent fuel storage facility at its Callaway energy center and intends to begin transferring spent fuel assemblies to this facility by 2020.

Electric utility rates charged to customers provide for the recovery of the Callaway energy center's decommissioning costs, which include decontamination, dismantling, and site restoration costs, over an assumed 40-year life of the nuclear center, ending with the expiration of the energy center's current operating license in 2024. It is assumed that the Callaway energy center site will be decommissioned through the immediate dismantlement method and removed from service. Ameren and Ameren Missouri have recorded an ARO for the Callaway energy center decommissioning costs at fair value, which represents the present value of estimated future cash outflows. Decommissioning costs are included in the costs of service used to establish electric rates for Ameren Missouri's customers. These costs amounted to $7 million in each of the years 2011, 2010, and 2009. Every three years, the MoPSC requires Ameren Missouri to file an updated cost study for decommissioning its Callaway energy center. Electric rates may be adjusted at such times to reflect changed estimates. This cost study was filed with the MoPSC in September 2011. After considering the results of this updated cost study and associated financial analysis, Ameren Missouri recommended to the MoPSC that the current rate of deposits to the trust fund continues to be appropriate and does not need to be changed. Amounts collected from customers are deposited in an external trust fund to provide for the Callaway energy center's decommissioning. If the assumed return on trust assets is not earned, we believe that it is probable that any such earnings deficiency will be recovered in rates. The fair value of the nuclear decommissioning trust fund for Ameren Missouri's Callaway energy center is reported as "Nuclear decommissioning trust fund" in Ameren's consolidated balance sheet and Ameren Missouri's balance sheet. This amount is legally restricted and may be used only to fund the costs of nuclear decommissioning. Changes in the fair value of the trust fund are recorded as an increase or decrease to the nuclear decommissioning trust fund, with an offsetting adjustment to the related regulatory asset or regulatory liability.

Retirement Benefits

NOTE 11 – RETIREMENT BENEFITS

The primary objective of the Ameren pension plans and postretirement benefit plans is to provide eligible employees with pension and postretirement health care and life insurance benefits. Ameren offers defined benefit pension and postretirement benefit plans covering substantially all of its employees. Ameren uses a measurement date of December 31 for its pension and postretirement benefit plans. Ameren Missouri, Ameren Illinois and Genco, excluding EEI, each participate in Ameren's single-employer pension and other postretirement plans. Ameren's qualified pension plan is the Ameren Retirement Plan. Ameren also has an unfunded non-qualified pension plan, the Ameren Supplemental Retirement Plan, which is available for certain management employees and retirees to provide a supplemental benefit when their qualified pension plan benefits are reduced to comply with Internal Revenue Code limitations. Ameren's other postretirement plans are the Ameren Retiree Medical Plan and the Ameren Group Life Insurance Plan. Separately, EEI employees and retirees participate in EEI's single-employer pension and other postretirement plans. EEI's pension plan is the Revised Retirement Plan for Employees of Electric Energy, Inc. EEI's other postretirement plans are the Group Insurance Plan for Management Employees of Electric Energy, Inc. and the Group Insurance Plan for Bargaining Unit Employees of Electric Energy, Inc. Nonaffiliated Ameren companies do not participate in the Ameren Retirement Plan, the Ameren Supplemental Retirement Plan, the Ameren Retiree Medical Plan, and the Ameren Group Life Insurance Plan. Ameren and Genco each consolidate EEI, and therefore, EEI's plans are reflected in Ameren's and Genco's pension and postretirement balances and disclosures.

The following table presents the benefit liability recorded on the balance sheets of each of the Ameren Companies as of December 31, 2011:

 

 

Ameren recognizes the underfunded status of its pension and postretirement plans as a liability on its balance sheet, with offsetting entries to accumulated OCI and regulatory assets, in accordance with authoritative accounting guidance. The following table presents the funded status of our pension and postretirement benefit plans as of December 31, 2011, and 2010. It also provides the amounts included in regulatory assets and accumulated OCI at December 31, 2011, and 2010, that have not been recognized in net periodic benefit costs.

 

The following table presents the assumptions used to determine our benefit obligations at December 31, 2011, and 2010:

 

        Pension Benefits      Postretirement Benefits  
        2011      2010      2011      2010  

Discount rate at measurement date

       4.50      5.25      4.50      5.25

Increase in future compensation

       3.50         3.50         3.50         3.50   

Medical cost trend rate (initial)

       -         -         5.50         6.00   

Medical cost trend rate (ultimate)

       -         -         5.00         5.00   

Years to ultimate rate

       -         -         10 year         2 years   

 

Ameren determines discount rate assumptions by using an interest rate yield curve pursuant to authoritative accounting guidance on the determination of discount rates used for defined benefit plan obligations. The yield curve is based on the yields of more than 500 high-quality corporate bonds with maturities between zero and 30 years. A theoretical spot-rate curve constructed from this yield curve is then used as a guide to develop a discount rate matching the plans' payout structure.

Funding

Pension benefits are based on the employees' years of service and compensation. Ameren's pension plan is funded in compliance with income tax regulations and federal funding or regulatory requirements. As a result, Ameren expects to fund its pension plan at a level equal to the greater of the pension expense or the legally required minimum contribution. Considering Ameren's assumptions at December 31, 2011, its investment performance in 2011, and its pension funding policy, Ameren expects to make annual contributions of $90 million to $150 million in each of the next five years, with aggregate estimated contributions of $580 million. We expect Ameren Missouri's, Ameren Illinois' and Genco's portion of the future funding requirements to be 51%, 33%, and 12%, respectively. These amounts are estimates. The estimates may change based on actual investment performance, changes in interest rates, changes in our assumptions, any pertinent changes in government regulations, and any voluntary contributions. Our funding policy for postretirement benefits is primarily to fund the Voluntary Employee Beneficiary Association (VEBA) trusts to match the annual postretirement expense.

The following table presents the cash contributions made to our defined benefit retirement plan and to our postretirement plans during 2011, 2010, and 2009:

 

 

Investment Strategy and Policies

Ameren manages plan assets in accordance with the "prudent investor" guidelines contained in ERISA. The investment committee, to the extent authority is delegated to it by the finance committee of Ameren's board of directors, implements investment strategy and asset allocation guidelines for the plan assets. The investment committee includes members of senior management. The investment committee's goals are twofold: first, to ensure that sufficient funds are available to provide the benefits at the time they are payable, and second, to maximize total return on plan assets and minimize expense volatility consistent with its tolerance for risk. Ameren delegates investment management to specialists in each asset class. As appropriate, Ameren provides the investment manager with guidelines that specify allowable and prohibited investment types. The investment committee regularly monitors manager performance and compliance with investment guidelines.

The expected return on plan assets assumption is based on historical and projected rates of return for current and planned asset classes in the investment portfolio. Projected rates of return for each asset class were estimated after an analysis of historical experience, future expectations, and the volatility of the various asset classes. After considering the target asset allocation for each asset class, we adjusted the overall expected rate of return for the portfolio for historical and expected experience of active portfolio management results compared with benchmark returns and for the effect of expenses paid from plan assets. Ameren will utilize an expected return on plan assets for its pension plan assets and postretirement plan assets of 7.75% and 7.50%, respectively, in 2012. No plan assets are expected to be returned to Ameren during 2012.

 

Ameren's investment committee strives to assemble a portfolio of diversified assets that does not create a significant concentration of risks. The investment committee develops asset allocation guidelines between asset classes, and it creates diversification through investments in assets that differ by type (equity, debt, real estate, private equity), duration, market capitalization, country, style (growth or value) and industry, among other factors. The diversification of assets is displayed in the target allocation table below. The investment committee also routinely rebalances the plan assets to adhere to the diversification goals. The investment committee's strategy reduces the concentration of investment risk; however, Ameren is still subject to overall market risk. The following table presents our target allocations for 2012 and our pension and postretirement plans' asset categories as of December 31, 2011, and 2010.

 

             Percentage of Plan Assets at December  31,  

Asset

Category

  

Target Allocation

2012

    2011     2010  

Pension Plan:

      

Cash and cash equivalents

       0  - 5       2     1

Equity securities:

      

U.S. large capitalization

     29 - 39        33        31   

U.S. small and mid-capitalization

       2 - 12        7        11   

International and emerging markets

       9 - 19        11        15   

Total equity

     50 - 60        51        57   

Debt securities

     35 - 45        42        37   

Real estate

       0 - 9          4        4   

Private equity

       0 - 4          1        1   

Total

             100     100

Postretirement Plans:

      

Cash and cash equivalents

       0 - 10     4     4

Equity securities:

      

U.S. large capitalization

     33 - 43        38        39   

U.S. small and mid-capitalization

       3 - 13        8        10   

International

     10 - 20        13        14   

Total equity

     55 - 65        59        63   

Debt securities

     30 - 40        37        33   

Total

             100     100

In general, the U.S. large capitalization equity investments are passively managed or indexed, whereas the international, emerging markets, U.S. small capitalization, and U.S. mid-capitalization equity investments are actively managed by investment managers. Debt securities include a broad range of fixed income vehicles. Debt security investments in high-yield securities, emerging market securities, and non-U.S. dollar-denominated securities are owned by the plans, but in limited quantities to reduce risk. Most of the debt security investments are under active management by investment managers. Real estate investments include private real estate vehicles; however, Ameren does not, by policy, hold direct investments in real estate property. Ameren's investment in private equity funds consists of 10 different limited partnerships, with invested capital ranging from $0.1 million to $7 million each, which invest primarily in a diversified number of small U.S.-based companies. No further commitments may be made to private equity investments without approval by the finance committee of the board of directors. Additionally, Ameren's investment committee allows investment managers to use derivatives, such as index futures, exchange traded funds, foreign exchange futures, and options, in certain situations, to increase or to reduce market exposure in an efficient and timely manner.

Fair Value Measurements of Plan Assets

Investments in the pension and postretirement benefit plans were stated at fair value as of December 31, 2011. The fair value of an asset is the amount that would be received upon sale in an orderly transaction between market participants at the measurement date. Cash and cash equivalents have initial maturities of three months or less and are recorded at cost plus accrued interest. The carrying amounts of cash and cash equivalents approximate fair value because of the short-term nature of these instruments. Investments traded in active markets on national or international securities exchanges are valued at closing prices on the last business day on or before the measurement date. Securities traded in over-the-counter markets are valued based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Derivative contracts are valued at fair value, as determined by the investment managers (or independent third parties on behalf of the investment managers), who use proprietary models and take into consideration exchange quotations on underlying instruments, dealer quotations, and other market information. The fair value of real estate is based on annual appraisal reports prepared by an independent real estate appraiser.

 

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 31       $ -       $ 31   

Equity securities:

          

U.S. large capitalization

     72        922         -         994   

U.S. small and mid-capitalization

     202        11         -         213   

International and emerging markets

     115        213         -         328   

Debt securities:

          

Corporate bonds

     -        720         -         720   

Municipal bonds

     -        176         -         176   

U.S. treasury and agency securities

     -        230         -         230   

Other

     -        121         -         121   

Real estate

     -        -         108         108   

Private equity

     -        -         23         23   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     389      $     2,424       $     131       $     2,944   

Less: Medical benefit assets at December 31(a)

             (91

Plus: Net receivables at December 31(b)

                               23   

Fair value of pension plans assets at year end

                             $ 2,876   

 

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 20       $ -       $ 20   

Equity securities:

          

U.S. large capitalization

     70        812         -         882   

U.S. small and mid-capitalization

     299        10         -         309   

International and emerging markets

     129        284         -         413   

Debt securities:

          

Corporate bonds

     -        646         -         646   

Municipal bonds

     -        129         -         129   

U.S. treasury and agency securities

     -        154         -         154   

Other

     -        100         -         100   

Real estate

     -        -         98         98   

Private equity

     -        -         28         28   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     498      $     2,155       $     126       $     2,779   

Less: Medical benefit assets at December 31(a)

             (85

Plus: Net receivables at December 31(b)

                               28   

Fair value of pension plans assets at year end

                             $ 2,722   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

 

The following table summarizes the changes in the fair value of the pension plan assets classified as Level 3 in the fair value hierarchy for each of the years ended December 31, 2011, and 2010:

 

    

Beginning

Balance at

January 1,

   

Actual Return on

Plan Assets Related

to Assets Still Held

at the Reporting Date

   

Actual Return on

Plan Assets Related

to Assets Sold

During the Period

   

Purchases,

Sales, and

Settlements, net

   

Net
Transfers
into (out of)

of Level 3

   

Ending Balance at

December 31,

 

2011:

           

Real estate

  $ 98      $ 10      $ -      $     -      $     -      $     108   

Private equity

    28        (10     11        (6     -        23   

2010:

           

Other debt securities

  $ 1      $     -      $     -      $ (1   $ -      $ -   

Real estate

        90        7        -        1        -        98   

Private equity

    33        (5     7        (7     -        28   

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ 1       $ 66       $ -       $ 67   

Equity securities:

           

U.S. large capitalization

         235         78         -         313   

U.S. small and mid-capitalization

     57         -         -         57   

International

     44         56         -         100   

Debt securities:

           

Corporate bonds

     -         61         -         61   

Municipal bonds

     -         86         -         86   

U.S. treasury and agency securities

     -         82         -         82   

Asset-backed securities

     -         23         -         23   

Other

     -         49         -         49   

Total

   $ 337       $     501       $     -       $     838   

Plus: Medical benefit assets at December 31(a)

              91   

Less: Net payables at December 31(b)

                                (33

Fair value of postretirement benefit plans assets at year end

                              $ 896   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -       $ 35       $ -       $ 35   

Equity securities:

           

U.S. large capitalization

         215         72         -         287   

U.S. small and mid-capitalization

     66         -         -         66   

International

     43         51         -         94   

Debt securities:

           

Corporate bonds

     -         59         -         59   

Municipal bonds

     -         58         -         58   

U.S. treasury and agency securities

     -         59         -         59   

Asset-backed securities

     -         31         -         31   

Other

     -         29         -         29   

Total

   $ 324       $     394       $     -       $     718   

Plus: Medical benefit assets at December 31(a)

              85   

Less: Net payables at December 31(b)

                                (6

Fair value of postretirement benefit plans assets at year end

                              $ 797   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

 

Net Periodic Benefit Cost

The following table presents the components of the net periodic benefit cost of our pension and postretirement benefit plans during 2011, 2010, and 2009:

 

The current year expected return on plan assets is determined primarily by adjusting the prior-year market-related asset value for current year contributions, disbursements, and expected return, plus 25% of the actual return in excess of (or less than) expected return for the four prior years.

The estimated amounts that will be amortized from regulatory assets and accumulated OCI into net periodic benefit cost in 2012 are as follows:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

Regulatory assets:

    

Transition obligation

   $ -      $ 2   

Prior service cost (credit)

     (1     (4

Net actuarial loss

     87        23   

Accumulated OCI:

    

Transition obligation

     -        -   

Prior service cost (credit)

     (1     (1

Net actuarial loss

     6        3   

Total

   $     91      $     23   

 

Prior service cost is amortized on a straight-line basis over the average future service of active participants benefiting under the plan amendment. The net actuarial loss subject to amortization is amortized on a straight-line basis over 10 years.

 

Ameren Missouri, Ameren Illinois and Genco are responsible for their share of the pension and postretirement benefit costs. The following table presents the pension costs and the postretirement benefit costs incurred for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Costs      Postretirement Costs  
      2011      2010      2009      2011      2010      2009  

Ameren(a)

   $     80       $     65       $     81       $     25       $     21       $     34   

Ameren Missouri

     51         42         50         11         11         15   

Ameren Illinois

     16         10         14         11         7         16   

Genco

     8         9         11         3         2         3   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The expected pension and postretirement benefit payments from qualified trust and company funds and the federal subsidy for postretirement benefits related to prescription drug benefits, which reflect expected future service, as of December 31, 2011, are as follows:

 

      Pension Benefits      Postretirement Benefits  
      Paid from
Qualified
Trust
     Paid from
Company
Funds
     Paid from
Qualified
Trust
     Paid from
Company
Funds
     Federal
Subsidy
 

2012

     223         3         68         3         5   

2013

     225         3         71         3         5   

2014

     230         3         74         3         5   

2015

     231         3         77         3         6   

2016

     232         3         80         3         6   

2017 - 2021

     1,167         12         443         14         32   

The following table presents the assumptions used to determine net periodic benefit cost for our pension and postretirement benefit plans for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      2011     2010     2009     2011     2010     2009  

Discount rate at measurement date

     5.25     5.75     5.75     5.25     5.75     5.75

Expected return on plan assets

     8.00        8.00        8.00        7.75        8.00        8.00   

Increase in future compensation

     3.50        3.50        4.00        3.50        3.50        4.00   

Medical cost trend rate (initial)

     -        -        -        6.00        6.50        7.00   

Medical cost trend rate (ultimate)

     -        -        -        5.00        5.00        5.00   

Years to ultimate rate

     -        -        -        2 years        3 years        4 years   

The table below reflects the sensitivity of Ameren's plans to potential changes in key assumptions:

 

      Pension Benefits      Postretirement Benefits  
      Service Cost
and Interest
Cost
    Projected
Benefit
Obligation
     Service Cost
and Interest
Cost
    Postretirement
Benefit
Obligation
 

0.25% decrease in discount rate

   $ (2   $ 110       $ -      $ 38   

0.25% increase in salary scale

     2        14         -        -   

1.00% increase in annual medical trend

     -        -         3        42   

1.00% decrease in annual medical trend

     -        -         (3     (41

Other

Ameren sponsors a 401(k) plan for eligible employees. The Ameren plan covered all eligible employees of the Ameren Companies at December 31, 2011. The plans allowed employees to contribute a portion of their compensation in accordance with specific guidelines. Ameren matched a percentage of the employee contributions up to certain limits. The following table presents the portion of the 401(k) matching contribution to the Ameren plan attributable to each of the Ameren Companies for the years ended December 31, 2011, 2010, and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 28       $ 27       $ 24   

Ameren Missouri

     16         16         14   

Ameren Illinois

     8         8         7   

Genco

     2         1         2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

NOTE 11 – RETIREMENT BENEFITS

The primary objective of the Ameren pension plans and postretirement benefit plans is to provide eligible employees with pension and postretirement health care and life insurance benefits. Ameren offers defined benefit pension and postretirement benefit plans covering substantially all of its employees. Ameren uses a measurement date of December 31 for its pension and postretirement benefit plans. Ameren Missouri, Ameren Illinois and Genco, excluding EEI, each participate in Ameren's single-employer pension and other postretirement plans. Ameren's qualified pension plan is the Ameren Retirement Plan. Ameren also has an unfunded non-qualified pension plan, the Ameren Supplemental Retirement Plan, which is available for certain management employees and retirees to provide a supplemental benefit when their qualified pension plan benefits are reduced to comply with Internal Revenue Code limitations. Ameren's other postretirement plans are the Ameren Retiree Medical Plan and the Ameren Group Life Insurance Plan. Separately, EEI employees and retirees participate in EEI's single-employer pension and other postretirement plans. EEI's pension plan is the Revised Retirement Plan for Employees of Electric Energy, Inc. EEI's other postretirement plans are the Group Insurance Plan for Management Employees of Electric Energy, Inc. and the Group Insurance Plan for Bargaining Unit Employees of Electric Energy, Inc. Nonaffiliated Ameren companies do not participate in the Ameren Retirement Plan, the Ameren Supplemental Retirement Plan, the Ameren Retiree Medical Plan, and the Ameren Group Life Insurance Plan. Ameren and Genco each consolidate EEI, and therefore, EEI's plans are reflected in Ameren's and Genco's pension and postretirement balances and disclosures.

The following table presents the benefit liability recorded on the balance sheets of each of the Ameren Companies as of December 31, 2011:

 

Ameren(a)

   $  1,350   

Ameren Missouri

     494   

Ameren Illinois

     496   

Genco

     141   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

Ameren recognizes the underfunded status of its pension and postretirement plans as a liability on its balance sheet, with offsetting entries to accumulated OCI and regulatory assets, in accordance with authoritative accounting guidance. The following table presents the funded status of our pension and postretirement benefit plans as of December 31, 2011, and 2010. It also provides the amounts included in regulatory assets and accumulated OCI at December 31, 2011, and 2010, that have not been recognized in net periodic benefit costs.

 

      2011     2010  
      Pension
Benefits(a)
   

Postretirement

Benefits(a)

    Pension
Benefits(a)
    Postretirement
Benefits(a)
 

Accumulated benefit obligation at end of year

   $ 3,645      $ (b   $ 3,246      $ (b

Change in benefit obligation:

        

Net benefit obligation at beginning of year

   $ 3,451      $ 1,120      $ 3,255      $ 1,143   

Service cost

     75        22        68        20   

Interest cost

     180        58        185        62   

Plan amendments(c)(d)

     (16     -        (40     -   

Participant contributions

     -        18        -        17   

Actuarial (gain) loss

     348        96        165        (53

Benefits paid

     (173     (66     (182     (74

Early retiree reinsurance program receipt

     (b     3        (b     -   

Federal subsidy on benefits paid

     (b     6        (b     5   

Net benefit obligation at end of year

     3,865        1,257        3,451        1,120   

Change in plan assets:

        

Fair value of plan assets at beginning of year

     2,722        797        2,495        732   

Actual return on plan assets

     224        9        328        81   

Employer contributions

     103        129        81        36   

Federal subsidy on benefits paid

     (b     6        (b     5   

Early retiree reinsurance program receipt

     (b     3        (b     -   

Participant contributions

     -        18        -        17   

Benefits paid

     (173     (66     (182     (74

Fair value of plan assets at end of year

     2,876        896        2,722        797   

Funded status – deficiency

     989        361        729        323   

Accrued benefit cost at December 31

   $ 989      $ 361      $ 729      $ 323   

Amounts recognized in the balance sheet consist of:

        

Current liability

   $ 3      $ 3      $ 4      $ 3   

Noncurrent liability

     986        358        725        320   

Total

   $ 989      $ 361      $ 729      $ 323   

Amounts recognized in regulatory assets consist of:

        

Net actuarial loss

   $ 734      $ 177      $ 507      $ 86   

Prior service cost (credit)

     (7     (28     (11     (32

Transition obligation

     -        2        -        5   

Amounts (pretax) recognized in accumulated OCI consist of:

        

Net actuarial loss

     79        43        24        13   

Prior service cost (credit)

     (15     (7     4        (10

Total

   $ 791      $ 187      $ 524      $ 62   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Not applicable.
(c) In 2011, Ameren's pension plan was amended to adjust the calculation of the future benefit obligation of approximately 430 labor union-represented employees from a traditional, final pay formula to a cash balance formula.
(d) In 2010, Ameren's pension plan was amended to adjust the calculation of the future benefit obligation of approximately 700 management employees from a traditional, final pay formula to a cash balance formula.

The following table presents the assumptions used to determine our benefit obligations at December 31, 2011, and 2010:

 

        Pension Benefits      Postretirement Benefits  
        2011      2010      2011      2010  

Discount rate at measurement date

       4.50      5.25      4.50      5.25

Increase in future compensation

       3.50         3.50         3.50         3.50   

Medical cost trend rate (initial)

       -         -         5.50         6.00   

Medical cost trend rate (ultimate)

       -         -         5.00         5.00   

Years to ultimate rate

       -         -         10 year         2 years   

 

Ameren determines discount rate assumptions by using an interest rate yield curve pursuant to authoritative accounting guidance on the determination of discount rates used for defined benefit plan obligations. The yield curve is based on the yields of more than 500 high-quality corporate bonds with maturities between zero and 30 years. A theoretical spot-rate curve constructed from this yield curve is then used as a guide to develop a discount rate matching the plans' payout structure.

Funding

Pension benefits are based on the employees' years of service and compensation. Ameren's pension plan is funded in compliance with income tax regulations and federal funding or regulatory requirements. As a result, Ameren expects to fund its pension plan at a level equal to the greater of the pension expense or the legally required minimum contribution. Considering Ameren's assumptions at December 31, 2011, its investment performance in 2011, and its pension funding policy, Ameren expects to make annual contributions of $90 million to $150 million in each of the next five years, with aggregate estimated contributions of $580 million. We expect Ameren Missouri's, Ameren Illinois' and Genco's portion of the future funding requirements to be 51%, 33%, and 12%, respectively. These amounts are estimates. The estimates may change based on actual investment performance, changes in interest rates, changes in our assumptions, any pertinent changes in government regulations, and any voluntary contributions. Our funding policy for postretirement benefits is primarily to fund the Voluntary Employee Beneficiary Association (VEBA) trusts to match the annual postretirement expense.

The following table presents the cash contributions made to our defined benefit retirement plan and to our postretirement plans during 2011, 2010, and 2009:

 

     Pension Benefits     Postretirement Benefits  
     2011     2010     2009     2011     2010     2009  

Ameren(a)

  $     103      $     81      $     99      $     129      $     36      $     49   

AMO

    43        36        42        9        11        13   

AIC

    28        23        25        118        20        28   

Genco

    12        4        10        -        -        -   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

Investment Strategy and Policies

Ameren manages plan assets in accordance with the "prudent investor" guidelines contained in ERISA. The investment committee, to the extent authority is delegated to it by the finance committee of Ameren's board of directors, implements investment strategy and asset allocation guidelines for the plan assets. The investment committee includes members of senior management. The investment committee's goals are twofold: first, to ensure that sufficient funds are available to provide the benefits at the time they are payable, and second, to maximize total return on plan assets and minimize expense volatility consistent with its tolerance for risk. Ameren delegates investment management to specialists in each asset class. As appropriate, Ameren provides the investment manager with guidelines that specify allowable and prohibited investment types. The investment committee regularly monitors manager performance and compliance with investment guidelines.

The expected return on plan assets assumption is based on historical and projected rates of return for current and planned asset classes in the investment portfolio. Projected rates of return for each asset class were estimated after an analysis of historical experience, future expectations, and the volatility of the various asset classes. After considering the target asset allocation for each asset class, we adjusted the overall expected rate of return for the portfolio for historical and expected experience of active portfolio management results compared with benchmark returns and for the effect of expenses paid from plan assets. Ameren will utilize an expected return on plan assets for its pension plan assets and postretirement plan assets of 7.75% and 7.50%, respectively, in 2012. No plan assets are expected to be returned to Ameren during 2012.

 

Ameren's investment committee strives to assemble a portfolio of diversified assets that does not create a significant concentration of risks. The investment committee develops asset allocation guidelines between asset classes, and it creates diversification through investments in assets that differ by type (equity, debt, real estate, private equity), duration, market capitalization, country, style (growth or value) and industry, among other factors. The diversification of assets is displayed in the target allocation table below. The investment committee also routinely rebalances the plan assets to adhere to the diversification goals. The investment committee's strategy reduces the concentration of investment risk; however, Ameren is still subject to overall market risk. The following table presents our target allocations for 2012 and our pension and postretirement plans' asset categories as of December 31, 2011, and 2010.

 

             Percentage of Plan Assets at December  31,  

Asset

Category

  

Target Allocation

2012

    2011     2010  

Pension Plan:

      

Cash and cash equivalents

       0  - 5       2     1

Equity securities:

      

U.S. large capitalization

     29 - 39        33        31   

U.S. small and mid-capitalization

       2 - 12        7        11   

International and emerging markets

       9 - 19        11        15   

Total equity

     50 - 60        51        57   

Debt securities

     35 - 45        42        37   

Real estate

       0 - 9          4        4   

Private equity

       0 -4          1        1   

Total

             100     100

Postretirement Plans:

      

Cash and cash equivalents

       0 - 10     4     4

Equity securities:

      

U.S. large capitalization

     33 - 43        38        39   

U.S. small and mid-capitalization

       3 - 13        8        10   

International

     10 - 20        13        14   

Total equity

     55 - 65        59        63   

Debt securities

     30 - 40        37        33   

Total

             100     100

In general, the U.S. large capitalization equity investments are passively managed or indexed, whereas the international, emerging markets, U.S. small capitalization, and U.S. mid-capitalization equity investments are actively managed by investment managers. Debt securities include a broad range of fixed income vehicles. Debt security investments in high-yield securities, emerging market securities, and non-U.S. dollar-denominated securities are owned by the plans, but in limited quantities to reduce risk. Most of the debt security investments are under active management by investment managers. Real estate investments include private real estate vehicles; however, Ameren does not, by policy, hold direct investments in real estate property. Ameren's investment in private equity funds consists of 10 different limited partnerships, with invested capital ranging from $0.1 million to $7 million each, which invest primarily in a diversified number of small U.S.-based companies. No further commitments may be made to private equity investments without approval by the finance committee of the board of directors. Additionally, Ameren's investment committee allows investment managers to use derivatives, such as index futures, exchange traded funds, foreign exchange futures, and options, in certain situations, to increase or to reduce market exposure in an efficient and timely manner.

Fair Value Measurements of Plan Assets

Investments in the pension and postretirement benefit plans were stated at fair value as of December 31, 2011. The fair value of an asset is the amount that would be received upon sale in an orderly transaction between market participants at the measurement date. Cash and cash equivalents have initial maturities of three months or less and are recorded at cost plus accrued interest. The carrying amounts of cash and cash equivalents approximate fair value because of the short-term nature of these instruments. Investments traded in active markets on national or international securities exchanges are valued at closing prices on the last business day on or before the measurement date. Securities traded in over-the-counter markets are valued based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Derivative contracts are valued at fair value, as determined by the investment managers (or independent third parties on behalf of the investment managers), who use proprietary models and take into consideration exchange quotations on underlying instruments, dealer quotations, and other market information. The fair value of real estate is based on annual appraisal reports prepared by an independent real estate appraiser.

 

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 31       $ -       $ 31   

Equity securities:

          

U.S. large capitalization

     72        922         -         994   

U.S. small and mid-capitalization

     202        11         -         213   

International and emerging markets

     115        213         -         328   

Debt securities:

          

Corporate bonds

     -        720         -         720   

Municipal bonds

     -        176         -         176   

U.S. treasury and agency securities

     -        230         -         230   

Other

     -        121         -         121   

Real estate

     -        -         108         108   

Private equity

     -        -         23         23   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     389      $     2,424       $     131       $     2,944   

Less: Medical benefit assets at December 31(a)

             (91

Plus: Net receivables at December 31(b)

                               23   

Fair value of pension plans assets at year end

                             $ 2,876   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 20       $ -       $ 20   

Equity securities:

          

U.S. large capitalization

     70        812         -         882   

U.S. small and mid-capitalization

     299        10         -         309   

International and emerging markets

     129        284         -         413   

Debt securities:

          

Corporate bonds

     -        646         -         646   

Municipal bonds

     -        129         -         129   

U.S. treasury and agency securities

     -        154         -         154   

Other

     -        100         -         100   

Real estate

     -        -         98         98   

Private equity

     -        -         28         28   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     498      $     2,155       $     126       $     2,779   

Less: Medical benefit assets at December 31(a)

             (85

Plus: Net receivables at December 31(b)

                               28   

Fair value of pension plans assets at year end

                             $ 2,722   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

 

The following table summarizes the changes in the fair value of the pension plan assets classified as Level 3 in the fair value hierarchy for each of the years ended December 31, 2011, and 2010:

 

    

Beginning

Balance at

January 1,

   

Actual Return on

Plan Assets Related

to Assets Still Held

at the Reporting Date

   

Actual Return on

Plan Assets Related

to Assets Sold

During the Period

   

Purchases,

Sales, and

Settlements, net

   

Net
Transfers
into (out of)

of Level 3

   

Ending Balance at

December 31,

 

2011:

           

Real estate

  $ 98      $ 10      $ -      $     -      $     -      $     108   

Private equity

    28        (10     11        (6     -        23   

2010:

           

Other debt securities

  $ 1      $     -      $     -      $ (1   $ -      $ -   

Real estate

        90        7        -        1        -        98   

Private equity

    33        (5     7        (7     -        28   

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ 1       $ 66       $ -       $ 67   

Equity securities:

           

U.S. large capitalization

         235         78         -         313   

U.S. small and mid-capitalization

     57         -         -         57   

International

     44         56         -         100   

Debt securities:

           

Corporate bonds

     -         61         -         61   

Municipal bonds

     -         86         -         86   

U.S. treasury and agency securities

     -         82         -         82   

Asset-backed securities

     -         23         -         23   

Other

     -         49         -         49   

Total

   $ 337       $     501       $     -       $     838   

Plus: Medical benefit assets at December 31(a)

              91   

Less: Net payables at December 31(b)

                                (33

Fair value of postretirement benefit plans assets at year end

                              $ 896   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -       $ 35       $ -       $ 35   

Equity securities:

           

U.S. large capitalization

         215         72         -         287   

U.S. small and mid-capitalization

     66         -         -         66   

International

     43         51         -         94   

Debt securities:

           

Corporate bonds

     -         59         -         59   

Municipal bonds

     -         58         -         58   

U.S. treasury and agency securities

     -         59         -         59   

Asset-backed securities

     -         31         -         31   

Other

     -         29         -         29   

Total

   $ 324       $     394       $     -       $     718   

Plus: Medical benefit assets at December 31(a)

              85   

Less: Net payables at December 31(b)

                                (6

Fair value of postretirement benefit plans assets at year end

                              $ 797   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

 

Net Periodic Benefit Cost

The following table presents the components of the net periodic benefit cost of our pension and postretirement benefit plans during 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

2011:

    

Service cost

   $ 75      $ 22   

Interest cost

         180        58   

Expected return on plan assets

     (216     (54

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     (1     (8

Actuarial loss

     42        5   

Net periodic benefit cost

   $ 80      $     25   

2010:

    

Service cost

   $ 68      $ 20   

Interest cost

     185        62   

Expected return on plan assets

     (212     (56

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     6        (8

Actuarial loss

     18        1   

Net periodic benefit cost

   $ 65      $ 21   

2009:

    

Service cost

   $ 68      $ 19   

Interest cost

     186        66   

Expected return on plan assets

     (206     (54

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     9        (8

Actuarial loss

     24        9   

Net periodic benefit cost

   $ 81      $ 34   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The current year expected return on plan assets is determined primarily by adjusting the prior-year market-related asset value for current year contributions, disbursements, and expected return, plus 25% of the actual return in excess of (or less than) expected return for the four prior years.

The estimated amounts that will be amortized from regulatory assets and accumulated OCI into net periodic benefit cost in 2012 are as follows:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

Regulatory assets:

    

Transition obligation

   $ -      $ 2   

Prior service cost (credit)

     (1     (4

Net actuarial loss

     87        23   

Accumulated OCI:

    

Transition obligation

     -        -   

Prior service cost (credit)

     (1     (1

Net actuarial loss

     6        3   

Total

   $     91      $     23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

Prior service cost is amortized on a straight-line basis over the average future service of active participants benefiting under the plan amendment. The net actuarial loss subject to amortization is amortized on a straight-line basis over 10 years.

 

Ameren Missouri, Ameren Illinois and Genco are responsible for their share of the pension and postretirement benefit costs. The following table presents the pension costs and the postretirement benefit costs incurred for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Costs      Postretirement Costs  
      2011      2010      2009      2011      2010      2009  

Ameren(a)

   $     80       $     65       $     81       $     25       $     21       $     34   

Ameren Missouri

     51         42         50         11         11         15   

Ameren Illinois

     16         10         14         11         7         16   

Genco

     8         9         11         3         2         3   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The expected pension and postretirement benefit payments from qualified trust and company funds and the federal subsidy for postretirement benefits related to prescription drug benefits, which reflect expected future service, as of December 31, 2011, are as follows:

 

      Pension Benefits      Postretirement Benefits  
      Paid from
Qualified
Trust
     Paid from
Company
Funds
     Paid from
Qualified
Trust
     Paid from
Company
Funds
     Federal
Subsidy
 

2012

     223         3         68         3         5   

2013

     225         3         71         3         5   

2014

     230         3         74         3         5   

2015

     231         3         77         3         6   

2016

     232         3         80         3         6   

2017 - 2021

     1,167         12         443         14         32   

The following table presents the assumptions used to determine net periodic benefit cost for our pension and postretirement benefit plans for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      2011     2010     2009     2011     2010     2009  

Discount rate at measurement date

     5.25     5.75     5.75     5.25     5.75     5.75

Expected return on plan assets

     8.00        8.00        8.00        7.75        8.00        8.00   

Increase in future compensation

     3.50        3.50        4.00        3.50        3.50        4.00   

Medical cost trend rate (initial)

     -        -        -        6.00        6.50        7.00   

Medical cost trend rate (ultimate)

     -        -        -        5.00        5.00        5.00   

Years to ultimate rate

     -        -        -        2 years        3 years        4 years   

The table below reflects the sensitivity of Ameren's plans to potential changes in key assumptions:

 

      Pension Benefits      Postretirement Benefits  
      Service Cost
and Interest
Cost
    Projected
Benefit
Obligation
     Service Cost
and Interest
Cost
    Postretirement
Benefit
Obligation
 

0.25% decrease in discount rate

   $ (2   $ 110       $ -      $ 38   

0.25% increase in salary scale

     2        14         -        -   

1.00% increase in annual medical trend

     -        -         3        42   

1.00% decrease in annual medical trend

     -        -         (3     (41

Other

Ameren sponsors a 401(k) plan for eligible employees. The Ameren plan covered all eligible employees of the Ameren Companies at December 31, 2011. The plans allowed employees to contribute a portion of their compensation in accordance with specific guidelines. Ameren matched a percentage of the employee contributions up to certain limits. The following table presents the portion of the 401(k) matching contribution to the Ameren plan attributable to each of the Ameren Companies for the years ended December 31, 2011, 2010, and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 28       $ 27       $ 24   

Ameren Missouri

     16         16         14   

Ameren Illinois

     8         8         7   

Genco

     2         1         2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

NOTE 11 – RETIREMENT BENEFITS

The primary objective of the Ameren pension plans and postretirement benefit plans is to provide eligible employees with pension and postretirement health care and life insurance benefits. Ameren offers defined benefit pension and postretirement benefit plans covering substantially all of its employees. Ameren uses a measurement date of December 31 for its pension and postretirement benefit plans. Ameren Missouri, Ameren Illinois and Genco, excluding EEI, each participate in Ameren's single-employer pension and other postretirement plans. Ameren's qualified pension plan is the Ameren Retirement Plan. Ameren also has an unfunded non-qualified pension plan, the Ameren Supplemental Retirement Plan, which is available for certain management employees and retirees to provide a supplemental benefit when their qualified pension plan benefits are reduced to comply with Internal Revenue Code limitations. Ameren's other postretirement plans are the Ameren Retiree Medical Plan and the Ameren Group Life Insurance Plan. Separately, EEI employees and retirees participate in EEI's single-employer pension and other postretirement plans. EEI's pension plan is the Revised Retirement Plan for Employees of Electric Energy, Inc. EEI's other postretirement plans are the Group Insurance Plan for Management Employees of Electric Energy, Inc. and the Group Insurance Plan for Bargaining Unit Employees of Electric Energy, Inc. Nonaffiliated Ameren companies do not participate in the Ameren Retirement Plan, the Ameren Supplemental Retirement Plan, the Ameren Retiree Medical Plan, and the Ameren Group Life Insurance Plan. Ameren and Genco each consolidate EEI, and therefore, EEI's plans are reflected in Ameren's and Genco's pension and postretirement balances and disclosures.

The following table presents the benefit liability recorded on the balance sheets of each of the Ameren Companies as of December 31, 2011:

 

Ameren(a)

   $  1,350   

Ameren Missouri

     494   

Ameren Illinois

     496   

Genco

     141   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

Ameren recognizes the underfunded status of its pension and postretirement plans as a liability on its balance sheet, with offsetting entries to accumulated OCI and regulatory assets, in accordance with authoritative accounting guidance. The following table presents the funded status of our pension and postretirement benefit plans as of December 31, 2011, and 2010. It also provides the amounts included in regulatory assets and accumulated OCI at December 31, 2011, and 2010, that have not been recognized in net periodic benefit costs.

 

      2011     2010  
      Pension
Benefits(a)
   

Postretirement

Benefits(a)

    Pension
Benefits(a)
    Postretirement
Benefits(a)
 

Accumulated benefit obligation at end of year

   $ 3,645      $ (b   $ 3,246      $ (b

Change in benefit obligation:

        

Net benefit obligation at beginning of year

   $ 3,451      $ 1,120      $ 3,255      $ 1,143   

Service cost

     75        22        68        20   

Interest cost

     180        58        185        62   

Plan amendments(c)(d)

     (16     -        (40     -   

Participant contributions

     -        18        -        17   

Actuarial (gain) loss

     348        96        165        (53

Benefits paid

     (173     (66     (182     (74

Early retiree reinsurance program receipt

     (b     3        (b     -   

Federal subsidy on benefits paid

     (b     6        (b     5   

Net benefit obligation at end of year

     3,865        1,257        3,451        1,120   

Change in plan assets:

        

Fair value of plan assets at beginning of year

     2,722        797        2,495        732   

Actual return on plan assets

     224        9        328        81   

Employer contributions

     103        129        81        36   

Federal subsidy on benefits paid

     (b     6        (b     5   

Early retiree reinsurance program receipt

     (b     3        (b     -   

Participant contributions

     -        18        -        17   

Benefits paid

     (173     (66     (182     (74

Fair value of plan assets at end of year

     2,876        896        2,722        797   

Funded status – deficiency

     989        361        729        323   

Accrued benefit cost at December 31

   $ 989      $ 361      $ 729      $ 323   

Amounts recognized in the balance sheet consist of:

        

Current liability

   $ 3      $ 3      $ 4      $ 3   

Noncurrent liability

     986        358        725        320   

Total

   $ 989      $ 361      $ 729      $ 323   

Amounts recognized in regulatory assets consist of:

        

Net actuarial loss

   $ 734      $ 177      $ 507      $ 86   

Prior service cost (credit)

     (7     (28     (11     (32

Transition obligation

     -        2        -        5   

Amounts (pretax) recognized in accumulated OCI consist of:

        

Net actuarial loss

     79        43        24        13   

Prior service cost (credit)

     (15     (7     4        (10

Total

   $ 791      $ 187      $ 524      $ 62   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Not applicable.
(c) In 2011, Ameren's pension plan was amended to adjust the calculation of the future benefit obligation of approximately 430 labor union-represented employees from a traditional, final pay formula to a cash balance formula.
(d) In 2010, Ameren's pension plan was amended to adjust the calculation of the future benefit obligation of approximately 700 management employees from a traditional, final pay formula to a cash balance formula.

The following table presents the assumptions used to determine our benefit obligations at December 31, 2011, and 2010:

 

        Pension Benefits      Postretirement Benefits  
        2011      2010      2011      2010  

Discount rate at measurement date

       4.50      5.25      4.50      5.25

Increase in future compensation

       3.50         3.50         3.50         3.50   

Medical cost trend rate (initial)

       -         -         5.50         6.00   

Medical cost trend rate (ultimate)

       -         -         5.00         5.00   

Years to ultimate rate

       -         -         10 year         2 years   

 

Ameren determines discount rate assumptions by using an interest rate yield curve pursuant to authoritative accounting guidance on the determination of discount rates used for defined benefit plan obligations. The yield curve is based on the yields of more than 500 high-quality corporate bonds with maturities between zero and 30 years. A theoretical spot-rate curve constructed from this yield curve is then used as a guide to develop a discount rate matching the plans' payout structure.

Funding

Pension benefits are based on the employees' years of service and compensation. Ameren's pension plan is funded in compliance with income tax regulations and federal funding or regulatory requirements. As a result, Ameren expects to fund its pension plan at a level equal to the greater of the pension expense or the legally required minimum contribution. Considering Ameren's assumptions at December 31, 2011, its investment performance in 2011, and its pension funding policy, Ameren expects to make annual contributions of $90 million to $150 million in each of the next five years, with aggregate estimated contributions of $580 million. We expect Ameren Missouri's, Ameren Illinois' and Genco's portion of the future funding requirements to be 51%, 33%, and 12%, respectively. These amounts are estimates. The estimates may change based on actual investment performance, changes in interest rates, changes in our assumptions, any pertinent changes in government regulations, and any voluntary contributions. Our funding policy for postretirement benefits is primarily to fund the Voluntary Employee Beneficiary Association (VEBA) trusts to match the annual postretirement expense.

The following table presents the cash contributions made to our defined benefit retirement plan and to our postretirement plans during 2011, 2010, and 2009:

 

     Pension Benefits     Postretirement Benefits  
     2011     2010     2009     2011     2010     2009  

Ameren(a)

  $     103      $     81      $     99      $     129      $     36      $     49   

AMO

    43        36        42        9        11        13   

AIC

    28        23        25        118        20        28   

Genco

    12        4        10        -        -        -   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

Investment Strategy and Policies

Ameren manages plan assets in accordance with the "prudent investor" guidelines contained in ERISA. The investment committee, to the extent authority is delegated to it by the finance committee of Ameren's board of directors, implements investment strategy and asset allocation guidelines for the plan assets. The investment committee includes members of senior management. The investment committee's goals are twofold: first, to ensure that sufficient funds are available to provide the benefits at the time they are payable, and second, to maximize total return on plan assets and minimize expense volatility consistent with its tolerance for risk. Ameren delegates investment management to specialists in each asset class. As appropriate, Ameren provides the investment manager with guidelines that specify allowable and prohibited investment types. The investment committee regularly monitors manager performance and compliance with investment guidelines.

The expected return on plan assets assumption is based on historical and projected rates of return for current and planned asset classes in the investment portfolio. Projected rates of return for each asset class were estimated after an analysis of historical experience, future expectations, and the volatility of the various asset classes. After considering the target asset allocation for each asset class, we adjusted the overall expected rate of return for the portfolio for historical and expected experience of active portfolio management results compared with benchmark returns and for the effect of expenses paid from plan assets. Ameren will utilize an expected return on plan assets for its pension plan assets and postretirement plan assets of 7.75% and 7.50%, respectively, in 2012. No plan assets are expected to be returned to Ameren during 2012.

 

Ameren's investment committee strives to assemble a portfolio of diversified assets that does not create a significant concentration of risks. The investment committee develops asset allocation guidelines between asset classes, and it creates diversification through investments in assets that differ by type (equity, debt, real estate, private equity), duration, market capitalization, country, style (growth or value) and industry, among other factors. The diversification of assets is displayed in the target allocation table below. The investment committee also routinely rebalances the plan assets to adhere to the diversification goals. The investment committee's strategy reduces the concentration of investment risk; however, Ameren is still subject to overall market risk. The following table presents our target allocations for 2012 and our pension and postretirement plans' asset categories as of December 31, 2011, and 2010.

 

             Percentage of Plan Assets at December  31,  

Asset

Category

  

Target Allocation

2012

    2011     2010  

Pension Plan:

      

Cash and cash equivalents

       0  - 5       2     1

Equity securities:

      

U.S. large capitalization

     29 - 39        33        31   

U.S. small and mid-capitalization

       2 - 12        7        11   

International and emerging markets

       9 - 19        11        15   

Total equity

     50 - 60        51        57   

Debt securities

     35 - 45        42        37   

Real estate

       0 - 9          4        4   

Private equity

       0 -4          1        1   

Total

             100     100

Postretirement Plans:

      

Cash and cash equivalents

       0 - 10     4     4

Equity securities:

      

U.S. large capitalization

     33 - 43        38        39   

U.S. small and mid-capitalization

       3 - 13        8        10   

International

     10 - 20        13        14   

Total equity

     55 - 65        59        63   

Debt securities

     30 - 40        37        33   

Total

             100     100

In general, the U.S. large capitalization equity investments are passively managed or indexed, whereas the international, emerging markets, U.S. small capitalization, and U.S. mid-capitalization equity investments are actively managed by investment managers. Debt securities include a broad range of fixed income vehicles. Debt security investments in high-yield securities, emerging market securities, and non-U.S. dollar-denominated securities are owned by the plans, but in limited quantities to reduce risk. Most of the debt security investments are under active management by investment managers. Real estate investments include private real estate vehicles; however, Ameren does not, by policy, hold direct investments in real estate property. Ameren's investment in private equity funds consists of 10 different limited partnerships, with invested capital ranging from $0.1 million to $7 million each, which invest primarily in a diversified number of small U.S.-based companies. No further commitments may be made to private equity investments without approval by the finance committee of the board of directors. Additionally, Ameren's investment committee allows investment managers to use derivatives, such as index futures, exchange traded funds, foreign exchange futures, and options, in certain situations, to increase or to reduce market exposure in an efficient and timely manner.

Fair Value Measurements of Plan Assets

Investments in the pension and postretirement benefit plans were stated at fair value as of December 31, 2011. The fair value of an asset is the amount that would be received upon sale in an orderly transaction between market participants at the measurement date. Cash and cash equivalents have initial maturities of three months or less and are recorded at cost plus accrued interest. The carrying amounts of cash and cash equivalents approximate fair value because of the short-term nature of these instruments. Investments traded in active markets on national or international securities exchanges are valued at closing prices on the last business day on or before the measurement date. Securities traded in over-the-counter markets are valued based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Derivative contracts are valued at fair value, as determined by the investment managers (or independent third parties on behalf of the investment managers), who use proprietary models and take into consideration exchange quotations on underlying instruments, dealer quotations, and other market information. The fair value of real estate is based on annual appraisal reports prepared by an independent real estate appraiser.

 

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 31       $ -       $ 31   

Equity securities:

          

U.S. large capitalization

     72        922         -         994   

U.S. small and mid-capitalization

     202        11         -         213   

International and emerging markets

     115        213         -         328   

Debt securities:

          

Corporate bonds

     -        720         -         720   

Municipal bonds

     -        176         -         176   

U.S. treasury and agency securities

     -        230         -         230   

Other

     -        121         -         121   

Real estate

     -        -         108         108   

Private equity

     -        -         23         23   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     389      $     2,424       $     131       $     2,944   

Less: Medical benefit assets at December 31(a)

             (91

Plus: Net receivables at December 31(b)

                               23   

Fair value of pension plans assets at year end

                             $ 2,876   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 20       $ -       $ 20   

Equity securities:

          

U.S. large capitalization

     70        812         -         882   

U.S. small and mid-capitalization

     299        10         -         309   

International and emerging markets

     129        284         -         413   

Debt securities:

          

Corporate bonds

     -        646         -         646   

Municipal bonds

     -        129         -         129   

U.S. treasury and agency securities

     -        154         -         154   

Other

     -        100         -         100   

Real estate

     -        -         98         98   

Private equity

     -        -         28         28   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     498      $     2,155       $     126       $     2,779   

Less: Medical benefit assets at December 31(a)

             (85

Plus: Net receivables at December 31(b)

                               28   

Fair value of pension plans assets at year end

                             $ 2,722   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

 

The following table summarizes the changes in the fair value of the pension plan assets classified as Level 3 in the fair value hierarchy for each of the years ended December 31, 2011, and 2010:

 

    

Beginning

Balance at

January 1,

   

Actual Return on

Plan Assets Related

to Assets Still Held

at the Reporting Date

   

Actual Return on

Plan Assets Related

to Assets Sold

During the Period

   

Purchases,

Sales, and

Settlements, net

   

Net
Transfers
into (out of)

of Level 3

   

Ending Balance at

December 31,

 

2011:

           

Real estate

  $ 98      $ 10      $ -      $     -      $     -      $     108   

Private equity

    28        (10     11        (6     -        23   

2010:

           

Other debt securities

  $ 1      $     -      $     -      $ (1   $ -      $ -   

Real estate

        90        7        -        1        -        98   

Private equity

    33        (5     7        (7     -        28   

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ 1       $ 66       $ -       $ 67   

Equity securities:

           

U.S. large capitalization

         235         78         -         313   

U.S. small and mid-capitalization

     57         -         -         57   

International

     44         56         -         100   

Debt securities:

           

Corporate bonds

     -         61         -         61   

Municipal bonds

     -         86         -         86   

U.S. treasury and agency securities

     -         82         -         82   

Asset-backed securities

     -         23         -         23   

Other

     -         49         -         49   

Total

   $ 337       $     501       $     -       $     838   

Plus: Medical benefit assets at December 31(a)

              91   

Less: Net payables at December 31(b)

                                (33

Fair value of postretirement benefit plans assets at year end

                              $ 896   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -       $ 35       $ -       $ 35   

Equity securities:

           

U.S. large capitalization

         215         72         -         287   

U.S. small and mid-capitalization

     66         -         -         66   

International

     43         51         -         94   

Debt securities:

           

Corporate bonds

     -         59         -         59   

Municipal bonds

     -         58         -         58   

U.S. treasury and agency securities

     -         59         -         59   

Asset-backed securities

     -         31         -         31   

Other

     -         29         -         29   

Total

   $ 324       $     394       $     -       $     718   

Plus: Medical benefit assets at December 31(a)

              85   

Less: Net payables at December 31(b)

                                (6

Fair value of postretirement benefit plans assets at year end

                              $ 797   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

 

Net Periodic Benefit Cost

The following table presents the components of the net periodic benefit cost of our pension and postretirement benefit plans during 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

2011:

    

Service cost

   $ 75      $ 22   

Interest cost

         180        58   

Expected return on plan assets

     (216     (54

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     (1     (8

Actuarial loss

     42        5   

Net periodic benefit cost

   $ 80      $     25   

2010:

    

Service cost

   $ 68      $ 20   

Interest cost

     185        62   

Expected return on plan assets

     (212     (56

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     6        (8

Actuarial loss

     18        1   

Net periodic benefit cost

   $ 65      $ 21   

2009:

    

Service cost

   $ 68      $ 19   

Interest cost

     186        66   

Expected return on plan assets

     (206     (54

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     9        (8

Actuarial loss

     24        9   

Net periodic benefit cost

   $ 81      $ 34   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The current year expected return on plan assets is determined primarily by adjusting the prior-year market-related asset value for current year contributions, disbursements, and expected return, plus 25% of the actual return in excess of (or less than) expected return for the four prior years.

The estimated amounts that will be amortized from regulatory assets and accumulated OCI into net periodic benefit cost in 2012 are as follows:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

Regulatory assets:

    

Transition obligation

   $ -      $ 2   

Prior service cost (credit)

     (1     (4

Net actuarial loss

     87        23   

Accumulated OCI:

    

Transition obligation

     -        -   

Prior service cost (credit)

     (1     (1

Net actuarial loss

     6        3   

Total

   $     91      $     23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

Prior service cost is amortized on a straight-line basis over the average future service of active participants benefiting under the plan amendment. The net actuarial loss subject to amortization is amortized on a straight-line basis over 10 years.

 

Ameren Missouri, Ameren Illinois and Genco are responsible for their share of the pension and postretirement benefit costs. The following table presents the pension costs and the postretirement benefit costs incurred for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Costs      Postretirement Costs  
      2011      2010      2009      2011      2010      2009  

Ameren(a)

   $     80       $     65       $     81       $     25       $     21       $     34   

Ameren Missouri

     51         42         50         11         11         15   

Ameren Illinois

     16         10         14         11         7         16   

Genco

     8         9         11         3         2         3   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The expected pension and postretirement benefit payments from qualified trust and company funds and the federal subsidy for postretirement benefits related to prescription drug benefits, which reflect expected future service, as of December 31, 2011, are as follows:

 

      Pension Benefits      Postretirement Benefits  
      Paid from
Qualified
Trust
     Paid from
Company
Funds
     Paid from
Qualified
Trust
     Paid from
Company
Funds
     Federal
Subsidy
 

2012

     223         3         68         3         5   

2013

     225         3         71         3         5   

2014

     230         3         74         3         5   

2015

     231         3         77         3         6   

2016

     232         3         80         3         6   

2017 - 2021

     1,167         12         443         14         32   

The following table presents the assumptions used to determine net periodic benefit cost for our pension and postretirement benefit plans for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      2011     2010     2009     2011     2010     2009  

Discount rate at measurement date

     5.25     5.75     5.75     5.25     5.75     5.75

Expected return on plan assets

     8.00        8.00        8.00        7.75        8.00        8.00   

Increase in future compensation

     3.50        3.50        4.00        3.50        3.50        4.00   

Medical cost trend rate (initial)

     -        -        -        6.00        6.50        7.00   

Medical cost trend rate (ultimate)

     -        -        -        5.00        5.00        5.00   

Years to ultimate rate

     -        -        -        2 years        3 years        4 years   

The table below reflects the sensitivity of Ameren's plans to potential changes in key assumptions:

 

      Pension Benefits      Postretirement Benefits  
      Service Cost
and Interest
Cost
    Projected
Benefit
Obligation
     Service Cost
and Interest
Cost
    Postretirement
Benefit
Obligation
 

0.25% decrease in discount rate

   $ (2   $ 110       $ -      $ 38   

0.25% increase in salary scale

     2        14         -        -   

1.00% increase in annual medical trend

     -        -         3        42   

1.00% decrease in annual medical trend

     -        -         (3     (41

Other

Ameren sponsors a 401(k) plan for eligible employees. The Ameren plan covered all eligible employees of the Ameren Companies at December 31, 2011. The plans allowed employees to contribute a portion of their compensation in accordance with specific guidelines. Ameren matched a percentage of the employee contributions up to certain limits. The following table presents the portion of the 401(k) matching contribution to the Ameren plan attributable to each of the Ameren Companies for the years ended December 31, 2011, 2010, and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 28       $ 27       $ 24   

Ameren Missouri

     16         16         14   

Ameren Illinois

     8         8         7   

Genco

     2         1         2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

NOTE 11 – RETIREMENT BENEFITS

The primary objective of the Ameren pension plans and postretirement benefit plans is to provide eligible employees with pension and postretirement health care and life insurance benefits. Ameren offers defined benefit pension and postretirement benefit plans covering substantially all of its employees. Ameren uses a measurement date of December 31 for its pension and postretirement benefit plans. Ameren Missouri, Ameren Illinois and Genco, excluding EEI, each participate in Ameren's single-employer pension and other postretirement plans. Ameren's qualified pension plan is the Ameren Retirement Plan. Ameren also has an unfunded non-qualified pension plan, the Ameren Supplemental Retirement Plan, which is available for certain management employees and retirees to provide a supplemental benefit when their qualified pension plan benefits are reduced to comply with Internal Revenue Code limitations. Ameren's other postretirement plans are the Ameren Retiree Medical Plan and the Ameren Group Life Insurance Plan. Separately, EEI employees and retirees participate in EEI's single-employer pension and other postretirement plans. EEI's pension plan is the Revised Retirement Plan for Employees of Electric Energy, Inc. EEI's other postretirement plans are the Group Insurance Plan for Management Employees of Electric Energy, Inc. and the Group Insurance Plan for Bargaining Unit Employees of Electric Energy, Inc. Nonaffiliated Ameren companies do not participate in the Ameren Retirement Plan, the Ameren Supplemental Retirement Plan, the Ameren Retiree Medical Plan, and the Ameren Group Life Insurance Plan. Ameren and Genco each consolidate EEI, and therefore, EEI's plans are reflected in Ameren's and Genco's pension and postretirement balances and disclosures.

The following table presents the benefit liability recorded on the balance sheets of each of the Ameren Companies as of December 31, 2011:

 

Ameren(a)

   $  1,350   

Ameren Missouri

     494   

Ameren Illinois

     496   

Genco

     141   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

Ameren recognizes the underfunded status of its pension and postretirement plans as a liability on its balance sheet, with offsetting entries to accumulated OCI and regulatory assets, in accordance with authoritative accounting guidance. The following table presents the funded status of our pension and postretirement benefit plans as of December 31, 2011, and 2010. It also provides the amounts included in regulatory assets and accumulated OCI at December 31, 2011, and 2010, that have not been recognized in net periodic benefit costs.

 

      2011     2010  
      Pension
Benefits(a)
   

Postretirement

Benefits(a)

    Pension
Benefits(a)
    Postretirement
Benefits(a)
 

Accumulated benefit obligation at end of year

   $ 3,645      $ (b   $ 3,246      $ (b

Change in benefit obligation:

        

Net benefit obligation at beginning of year

   $ 3,451      $ 1,120      $ 3,255      $ 1,143   

Service cost

     75        22        68        20   

Interest cost

     180        58        185        62   

Plan amendments(c)(d)

     (16     -        (40     -   

Participant contributions

     -        18        -        17   

Actuarial (gain) loss

     348        96        165        (53

Benefits paid

     (173     (66     (182     (74

Early retiree reinsurance program receipt

     (b     3        (b     -   

Federal subsidy on benefits paid

     (b     6        (b     5   

Net benefit obligation at end of year

     3,865        1,257        3,451        1,120   

Change in plan assets:

        

Fair value of plan assets at beginning of year

     2,722        797        2,495        732   

Actual return on plan assets

     224        9        328        81   

Employer contributions

     103        129        81        36   

Federal subsidy on benefits paid

     (b     6        (b     5   

Early retiree reinsurance program receipt

     (b     3        (b     -   

Participant contributions

     -        18        -        17   

Benefits paid

     (173     (66     (182     (74

Fair value of plan assets at end of year

     2,876        896        2,722        797   

Funded status – deficiency

     989        361        729        323   

Accrued benefit cost at December 31

   $ 989      $ 361      $ 729      $ 323   

Amounts recognized in the balance sheet consist of:

        

Current liability

   $ 3      $ 3      $ 4      $ 3   

Noncurrent liability

     986        358        725        320   

Total

   $ 989      $ 361      $ 729      $ 323   

Amounts recognized in regulatory assets consist of:

        

Net actuarial loss

   $ 734      $ 177      $ 507      $ 86   

Prior service cost (credit)

     (7     (28     (11     (32

Transition obligation

     -        2        -        5   

Amounts (pretax) recognized in accumulated OCI consist of:

        

Net actuarial loss

     79        43        24        13   

Prior service cost (credit)

     (15     (7     4        (10

Total

   $ 791      $ 187      $ 524      $ 62   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Not applicable.
(c) In 2011, Ameren's pension plan was amended to adjust the calculation of the future benefit obligation of approximately 430 labor union-represented employees from a traditional, final pay formula to a cash balance formula.
(d) In 2010, Ameren's pension plan was amended to adjust the calculation of the future benefit obligation of approximately 700 management employees from a traditional, final pay formula to a cash balance formula.

The following table presents the assumptions used to determine our benefit obligations at December 31, 2011, and 2010:

 

        Pension Benefits      Postretirement Benefits  
        2011      2010      2011      2010  

Discount rate at measurement date

       4.50      5.25      4.50      5.25

Increase in future compensation

       3.50         3.50         3.50         3.50   

Medical cost trend rate (initial)

       -         -         5.50         6.00   

Medical cost trend rate (ultimate)

       -         -         5.00         5.00   

Years to ultimate rate

       -         -         10 year         2 years   

 

Ameren determines discount rate assumptions by using an interest rate yield curve pursuant to authoritative accounting guidance on the determination of discount rates used for defined benefit plan obligations. The yield curve is based on the yields of more than 500 high-quality corporate bonds with maturities between zero and 30 years. A theoretical spot-rate curve constructed from this yield curve is then used as a guide to develop a discount rate matching the plans' payout structure.

Funding

Pension benefits are based on the employees' years of service and compensation. Ameren's pension plan is funded in compliance with income tax regulations and federal funding or regulatory requirements. As a result, Ameren expects to fund its pension plan at a level equal to the greater of the pension expense or the legally required minimum contribution. Considering Ameren's assumptions at December 31, 2011, its investment performance in 2011, and its pension funding policy, Ameren expects to make annual contributions of $90 million to $150 million in each of the next five years, with aggregate estimated contributions of $580 million. We expect Ameren Missouri's, Ameren Illinois' and Genco's portion of the future funding requirements to be 51%, 33%, and 12%, respectively. These amounts are estimates. The estimates may change based on actual investment performance, changes in interest rates, changes in our assumptions, any pertinent changes in government regulations, and any voluntary contributions. Our funding policy for postretirement benefits is primarily to fund the Voluntary Employee Beneficiary Association (VEBA) trusts to match the annual postretirement expense.

The following table presents the cash contributions made to our defined benefit retirement plan and to our postretirement plans during 2011, 2010, and 2009:

 

     Pension Benefits     Postretirement Benefits  
     2011     2010     2009     2011     2010     2009  

Ameren(a)

  $     103      $     81      $     99      $     129      $     36      $     49   

AMO

    43        36        42        9        11        13   

AIC

    28        23        25        118        20        28   

Genco

    12        4        10        -        -        -   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

Investment Strategy and Policies

Ameren manages plan assets in accordance with the "prudent investor" guidelines contained in ERISA. The investment committee, to the extent authority is delegated to it by the finance committee of Ameren's board of directors, implements investment strategy and asset allocation guidelines for the plan assets. The investment committee includes members of senior management. The investment committee's goals are twofold: first, to ensure that sufficient funds are available to provide the benefits at the time they are payable, and second, to maximize total return on plan assets and minimize expense volatility consistent with its tolerance for risk. Ameren delegates investment management to specialists in each asset class. As appropriate, Ameren provides the investment manager with guidelines that specify allowable and prohibited investment types. The investment committee regularly monitors manager performance and compliance with investment guidelines.

The expected return on plan assets assumption is based on historical and projected rates of return for current and planned asset classes in the investment portfolio. Projected rates of return for each asset class were estimated after an analysis of historical experience, future expectations, and the volatility of the various asset classes. After considering the target asset allocation for each asset class, we adjusted the overall expected rate of return for the portfolio for historical and expected experience of active portfolio management results compared with benchmark returns and for the effect of expenses paid from plan assets. Ameren will utilize an expected return on plan assets for its pension plan assets and postretirement plan assets of 7.75% and 7.50%, respectively, in 2012. No plan assets are expected to be returned to Ameren during 2012.

 

Ameren's investment committee strives to assemble a portfolio of diversified assets that does not create a significant concentration of risks. The investment committee develops asset allocation guidelines between asset classes, and it creates diversification through investments in assets that differ by type (equity, debt, real estate, private equity), duration, market capitalization, country, style (growth or value) and industry, among other factors. The diversification of assets is displayed in the target allocation table below. The investment committee also routinely rebalances the plan assets to adhere to the diversification goals. The investment committee's strategy reduces the concentration of investment risk; however, Ameren is still subject to overall market risk. The following table presents our target allocations for 2012 and our pension and postretirement plans' asset categories as of December 31, 2011, and 2010.

 

             Percentage of Plan Assets at December  31,  

Asset

Category

  

Target Allocation

2012

    2011     2010  

Pension Plan:

      

Cash and cash equivalents

       0  - 5       2     1

Equity securities:

      

U.S. large capitalization

     29 - 39        33        31   

U.S. small and mid-capitalization

       2 - 12        7        11   

International and emerging markets

       9 - 19        11        15   

Total equity

     50 - 60        51        57   

Debt securities

     35 - 45        42        37   

Real estate

       0 - 9          4        4   

Private equity

       0 -4          1        1   

Total

             100     100

Postretirement Plans:

      

Cash and cash equivalents

       0 - 10     4     4

Equity securities:

      

U.S. large capitalization

     33 - 43        38        39   

U.S. small and mid-capitalization

       3 - 13        8        10   

International

     10 - 20        13        14   

Total equity

     55 - 65        59        63   

Debt securities

     30 - 40        37        33   

Total

             100     100

In general, the U.S. large capitalization equity investments are passively managed or indexed, whereas the international, emerging markets, U.S. small capitalization, and U.S. mid-capitalization equity investments are actively managed by investment managers. Debt securities include a broad range of fixed income vehicles. Debt security investments in high-yield securities, emerging market securities, and non-U.S. dollar-denominated securities are owned by the plans, but in limited quantities to reduce risk. Most of the debt security investments are under active management by investment managers. Real estate investments include private real estate vehicles; however, Ameren does not, by policy, hold direct investments in real estate property. Ameren's investment in private equity funds consists of 10 different limited partnerships, with invested capital ranging from $0.1 million to $7 million each, which invest primarily in a diversified number of small U.S.-based companies. No further commitments may be made to private equity investments without approval by the finance committee of the board of directors. Additionally, Ameren's investment committee allows investment managers to use derivatives, such as index futures, exchange traded funds, foreign exchange futures, and options, in certain situations, to increase or to reduce market exposure in an efficient and timely manner.

Fair Value Measurements of Plan Assets

Investments in the pension and postretirement benefit plans were stated at fair value as of December 31, 2011. The fair value of an asset is the amount that would be received upon sale in an orderly transaction between market participants at the measurement date. Cash and cash equivalents have initial maturities of three months or less and are recorded at cost plus accrued interest. The carrying amounts of cash and cash equivalents approximate fair value because of the short-term nature of these instruments. Investments traded in active markets on national or international securities exchanges are valued at closing prices on the last business day on or before the measurement date. Securities traded in over-the-counter markets are valued based on quoted market prices, broker or dealer quotations, or alternative pricing sources with reasonable levels of price transparency. Derivative contracts are valued at fair value, as determined by the investment managers (or independent third parties on behalf of the investment managers), who use proprietary models and take into consideration exchange quotations on underlying instruments, dealer quotations, and other market information. The fair value of real estate is based on annual appraisal reports prepared by an independent real estate appraiser.

 

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 31       $ -       $ 31   

Equity securities:

          

U.S. large capitalization

     72        922         -         994   

U.S. small and mid-capitalization

     202        11         -         213   

International and emerging markets

     115        213         -         328   

Debt securities:

          

Corporate bonds

     -        720         -         720   

Municipal bonds

     -        176         -         176   

U.S. treasury and agency securities

     -        230         -         230   

Other

     -        121         -         121   

Real estate

     -        -         108         108   

Private equity

     -        -         23         23   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     389      $     2,424       $     131       $     2,944   

Less: Medical benefit assets at December 31(a)

             (91

Plus: Net receivables at December 31(b)

                               23   

Fair value of pension plans assets at year end

                             $ 2,876   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 20       $ -       $ 20   

Equity securities:

          

U.S. large capitalization

     70        812         -         882   

U.S. small and mid-capitalization

     299        10         -         309   

International and emerging markets

     129        284         -         413   

Debt securities:

          

Corporate bonds

     -        646         -         646   

Municipal bonds

     -        129         -         129   

U.S. treasury and agency securities

     -        154         -         154   

Other

     -        100         -         100   

Real estate

     -        -         98         98   

Private equity

     -        -         28         28   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     498      $     2,155       $     126       $     2,779   

Less: Medical benefit assets at December 31(a)

             (85

Plus: Net receivables at December 31(b)

                               28   

Fair value of pension plans assets at year end

                             $ 2,722   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

 

The following table summarizes the changes in the fair value of the pension plan assets classified as Level 3 in the fair value hierarchy for each of the years ended December 31, 2011, and 2010:

 

    

Beginning

Balance at

January 1,

   

Actual Return on

Plan Assets Related

to Assets Still Held

at the Reporting Date

   

Actual Return on

Plan Assets Related

to Assets Sold

During the Period

   

Purchases,

Sales, and

Settlements, net

   

Net
Transfers
into (out of)

of Level 3

   

Ending Balance at

December 31,

 

2011:

           

Real estate

  $ 98      $ 10      $ -      $     -      $     -      $     108   

Private equity

    28        (10     11        (6     -        23   

2010:

           

Other debt securities

  $ 1      $     -      $     -      $ (1   $ -      $ -   

Real estate

        90        7        -        1        -        98   

Private equity

    33        (5     7        (7     -        28   

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2011:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ 1       $ 66       $ -       $ 67   

Equity securities:

           

U.S. large capitalization

         235         78         -         313   

U.S. small and mid-capitalization

     57         -         -         57   

International

     44         56         -         100   

Debt securities:

           

Corporate bonds

     -         61         -         61   

Municipal bonds

     -         86         -         86   

U.S. treasury and agency securities

     -         82         -         82   

Asset-backed securities

     -         23         -         23   

Other

     -         49         -         49   

Total

   $ 337       $     501       $     -       $     838   

Plus: Medical benefit assets at December 31(a)

              91   

Less: Net payables at December 31(b)

                                (33

Fair value of postretirement benefit plans assets at year end

                              $ 896   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -       $ 35       $ -       $ 35   

Equity securities:

           

U.S. large capitalization

         215         72         -         287   

U.S. small and mid-capitalization

     66         -         -         66   

International

     43         51         -         94   

Debt securities:

           

Corporate bonds

     -         59         -         59   

Municipal bonds

     -         58         -         58   

U.S. treasury and agency securities

     -         59         -         59   

Asset-backed securities

     -         31         -         31   

Other

     -         29         -         29   

Total

   $ 324       $     394       $     -       $     718   

Plus: Medical benefit assets at December 31(a)

              85   

Less: Net payables at December 31(b)

                                (6

Fair value of postretirement benefit plans assets at year end

                              $ 797   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

 

Net Periodic Benefit Cost

The following table presents the components of the net periodic benefit cost of our pension and postretirement benefit plans during 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

2011:

    

Service cost

   $ 75      $ 22   

Interest cost

         180        58   

Expected return on plan assets

     (216     (54

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     (1     (8

Actuarial loss

     42        5   

Net periodic benefit cost

   $ 80      $     25   

2010:

    

Service cost

   $ 68      $ 20   

Interest cost

     185        62   

Expected return on plan assets

     (212     (56

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     6        (8

Actuarial loss

     18        1   

Net periodic benefit cost

   $ 65      $ 21   

2009:

    

Service cost

   $ 68      $ 19   

Interest cost

     186        66   

Expected return on plan assets

     (206     (54

Amortization of:

    

Transition obligation

     -        2   

Prior service cost

     9        (8

Actuarial loss

     24        9   

Net periodic benefit cost

   $ 81      $ 34   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The current year expected return on plan assets is determined primarily by adjusting the prior-year market-related asset value for current year contributions, disbursements, and expected return, plus 25% of the actual return in excess of (or less than) expected return for the four prior years.

The estimated amounts that will be amortized from regulatory assets and accumulated OCI into net periodic benefit cost in 2012 are as follows:

 

      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

Regulatory assets:

    

Transition obligation

   $ -      $ 2   

Prior service cost (credit)

     (1     (4

Net actuarial loss

     87        23   

Accumulated OCI:

    

Transition obligation

     -        -   

Prior service cost (credit)

     (1     (1

Net actuarial loss

     6        3   

Total

   $     91      $     23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

Prior service cost is amortized on a straight-line basis over the average future service of active participants benefiting under the plan amendment. The net actuarial loss subject to amortization is amortized on a straight-line basis over 10 years.

 

Ameren Missouri, Ameren Illinois and Genco are responsible for their share of the pension and postretirement benefit costs. The following table presents the pension costs and the postretirement benefit costs incurred for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Costs      Postretirement Costs  
      2011      2010      2009      2011      2010      2009  

Ameren(a)

   $     80       $     65       $     81       $     25       $     21       $     34   

Ameren Missouri

     51         42         50         11         11         15   

Ameren Illinois

     16         10         14         11         7         16   

Genco

     8         9         11         3         2         3   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

The expected pension and postretirement benefit payments from qualified trust and company funds and the federal subsidy for postretirement benefits related to prescription drug benefits, which reflect expected future service, as of December 31, 2011, are as follows:

 

      Pension Benefits      Postretirement Benefits  
      Paid from
Qualified
Trust
     Paid from
Company
Funds
     Paid from
Qualified
Trust
     Paid from
Company
Funds
     Federal
Subsidy
 

2012

     223         3         68         3         5   

2013

     225         3         71         3         5   

2014

     230         3         74         3         5   

2015

     231         3         77         3         6   

2016

     232         3         80         3         6   

2017 - 2021

     1,167         12         443         14         32   

The following table presents the assumptions used to determine net periodic benefit cost for our pension and postretirement benefit plans for the years ended December 31, 2011, 2010, and 2009:

 

      Pension Benefits     Postretirement Benefits  
      2011     2010     2009     2011     2010     2009  

Discount rate at measurement date

     5.25     5.75     5.75     5.25     5.75     5.75

Expected return on plan assets

     8.00        8.00        8.00        7.75        8.00        8.00   

Increase in future compensation

     3.50        3.50        4.00        3.50        3.50        4.00   

Medical cost trend rate (initial)

     -        -        -        6.00        6.50        7.00   

Medical cost trend rate (ultimate)

     -        -        -        5.00        5.00        5.00   

Years to ultimate rate

     -        -        -        2 years        3 years        4 years   

The table below reflects the sensitivity of Ameren's plans to potential changes in key assumptions:

 

      Pension Benefits      Postretirement Benefits  
      Service Cost
and Interest
Cost
    Projected
Benefit
Obligation
     Service Cost
and Interest
Cost
    Postretirement
Benefit
Obligation
 

0.25% decrease in discount rate

   $ (2   $ 110       $ -      $ 38   

0.25% increase in salary scale

     2        14         -        -   

1.00% increase in annual medical trend

     -        -         3        42   

1.00% decrease in annual medical trend

     -        -         (3     (41

Other

Ameren sponsors a 401(k) plan for eligible employees. The Ameren plan covered all eligible employees of the Ameren Companies at December 31, 2011. The plans allowed employees to contribute a portion of their compensation in accordance with specific guidelines. Ameren matched a percentage of the employee contributions up to certain limits. The following table presents the portion of the 401(k) matching contribution to the Ameren plan attributable to each of the Ameren Companies for the years ended December 31, 2011, 2010, and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 28       $ 27       $ 24   

Ameren Missouri

     16         16         14   

Ameren Illinois

     8         8         7   

Genco

     2         1         2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
Stock-Based Compensation
Stock-Based Compensation

NOTE 12 – STOCK-BASED COMPENSATION

Ameren's long-term incentive plan for eligible employees, called the Long-term Incentive Plan of 1998 (1998 Plan), was replaced prospectively by the 2006 Omnibus Incentive Compensation Plan (2006 Plan) effective May 2, 2006. The 2006 Plan provides for a maximum of 4 million common shares to be available for grant to eligible employees and directors. No new awards may be granted under the 1998 Plan. Previously granted awards have vested in accordance with their original terms and conditions. The 2006 Plan awards may be stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance share units, cash-based awards, and other stock-based awards.

A summary of nonvested shares at December 31, 2011, and changes during the year ended December 31, 2011, under the 1998 Plan and the 2006 Plan are presented below:

 

 

 

Ameren recorded compensation expense of $14 million, $13 million, and $13 million for the years ended December 31, 2011, 2010, and 2009, respectively, and a related tax benefit of $5 million for each of the years ended December 31, 2011, 2010, and 2009, respectively. Ameren settled performance share units and restricted shares of $4 million, $2 million, and less than $1 million for the years ended December 31, 2011, 2010, and 2009. There were no significant compensation costs capitalized during the years ended December 31, 2011, 2010, and 2009. As of December 31, 2011, total compensation cost of $17 million related to nonvested awards not yet recognized is expected to be recognized over a weighted-average period of 20 months.

 

Performance Share Units

Performance share unit awards have been granted under the 2006 Plan. A share unit vests and entitles an employee to receive shares of Ameren common stock (plus accumulated dividends) if, at the end of the three-year performance period, certain specified performance or market conditions have been met and the individual remains employed by Ameren. The exact number of shares issued pursuant to a share unit vary from 0% to 200% of the target award, depending on actual company performance relative to the performance goals. For performance share units granted prior to 2009, vested performance shares units must be held for a two-year period before being paid to the employee in shares of Ameren common stock. During this two-year hold period, the employee is paid dividend equivalents on a current basis.

The fair value of each share unit awarded in January 2011 under the 2006 Plan was determined to be $31.41. That amount was based on Ameren's closing common share price of $28.19 at December 31, 2010, and lattice simulations. Lattice simulations are used to estimate expected share payout based on Ameren's total shareholder return for a three-year performance period relative to the designated peer group beginning January 1, 2011. The simulations can produce a greater fair value for the share unit than the closing common share price because they include the weighted payout scenarios in which an increase in the share price has occurred. The significant assumptions used to calculate fair value also included a three-year risk-free rate of 1.08%, volatility of 22% to 36% for the peer group, and Ameren's attainment of three-year average earnings per share threshold during the performance period.

The fair value of each share unit awarded in January 2010 under the 2006 Plan was determined to be $32.01. That amount was based on Ameren's closing common share price of $27.95 at December 31, 2009, and lattice simulations. Lattice simulations are used to estimate expected share payout based on Ameren's total stockholder return for a three-year performance period relative to the designated peer group beginning January 1, 2010. The significant assumptions used to calculate fair value also included a three-year risk-free rate of 1.70%, volatility of 23% to 39% for the peer group, and Ameren's attainment of three-year average earnings per share threshold during each year of the performance period.

Restricted Stock

Restricted stock awards of Ameren common stock were granted under the 1998 Plan from 2001 to 2005. Restricted shares had the potential to vest over a seven-year period from the date of grant if Ameren achieved certain performance levels. An accelerated vesting provision included in this plan reduced the vesting period from seven years to three years if the earnings growth rate exceeded a prescribed level.

Income Taxes

NOTE 13 – INCOME TAXES

The following table presents the principal reasons why the effective income tax rate differed from the statutory federal income tax rate for the years ended December 31, 2011, 2010, and 2009:

 

 

The following table presents the components of income tax expense (benefit) for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Current taxes:

        

Federal

   $ (27   $ 3      $ (24   $ (21

State

     (5     2        (4     (7

Deferred taxes:

        

Federal

     273        129        123        43   

State

     76        31        34        18   

Deferred investment tax credits, amortization

     (7     (4     (2     (1

Total income tax expense

   $ 310      $ 161      $ 127      $ 32   

2010:

        

Current taxes:

        

Federal

   $ 13      $ (14   $ (20   $ (5

State

     10        (15     (5     6   

Deferred taxes:

        

Federal

     274        206        132        22   

State

     36        27        32        (2

Deferred investment tax credits, amortization

     (8     (5     (2     (1

Total income tax expense

   $ 325      $ 199      $ 137      $ 20   

2009:

        

Current taxes:

        

Federal

   $ (73   $ (117   $ (8   $ 22   

State

     3        (31     14        14   

Deferred taxes:

        

Federal

     337        239        64        57   

State

     74        42        11        9   

Deferred investment tax credits, amortization

     (9     (5     (2     (1

Total income tax expense

   $ 332      $ 128      $ 79      $ 101   

 

(a)

 

The Illinois corporate income tax rate increased from 7.3% to 9.5%, starting in January 2011. The tax rate is scheduled to decrease to 7.75% in 2015, and it is scheduled to return to 7.3% in 2025. This corporate income tax rate increase in Illinois increased current income tax expense in 2011 by $6 million, $4 million and $3 million for Ameren, Ameren Illinois and Genco, respectively. As a result of this corporate income tax rate increase, accumulated deferred tax balances were revalued, resulting in a decrease in deferred tax expense of $2 million, $3 million and $- million for Ameren, Ameren Illinois, and Genco, respectively.

The following table presents the deferred tax assets and deferred tax liabilities recorded as a result of temporary differences at December 31, 2011, and 2010:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,811      $ 2,134      $ 1,003      $ 457   

Deferred intercompany tax gain/basis step-up

     3        (1     55        (54

Regulatory assets, net

     73        73        -        -   

Deferred employee benefit costs

     (367     (88     (109     (67

Purchase accounting

     35        -        (27     15   

ARO

     (37     -        1        (25

Other

     (223     6        (86     (22

Total net accumulated deferred income tax liabilities(b)

   $ 3,295      $ 2,124      $ 837      $ 304   

2010:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,310      $ 1,974      $ 750      $ 378   

Deferred intercompany tax gain/basis step-up

     2        (2     71        (68

Regulatory assets (liabilities), net

     67        68        (1     -   

Deferred employee benefit costs

     (360     (87     (124     (45

Purchase accounting

     106        -        41        17   

ARO

     (48     (9     1        (27

Other

     (120     7        (57     10   

Total net accumulated deferred income tax liabilities(c)

   $ 2,957      $ 1,951      $ 681      $ 265   

 

The following table presents the components of deferred tax assets relating to net operating loss carryforwards and tax credit carryforwards at December 31, 2011:

 

Uncertain Tax Positions

A reconciliation of the change in the unrecognized tax benefit balance during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

Unrecognized tax benefits – January 1, 2009

   $     110      $                     20      $ -      $ 48   

Increases based on tax positions prior to 2009

     90        76        -        9   

Decreases based on tax positions prior to 2009

     (84     (19     -        (31

Increases based on tax positions related to 2009

     19        11        -        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2009

   $ 135      $ 88      $ -      $ 29   

Increases based on tax positions prior to 2010

     72        40        27        4   

Decreases based on tax positions prior to 2010

     (38     (12     (2     (16

Increases based on tax positions related to 2010

     77        48        31        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2010

   $ 246      $ 164      $ 56      $     20   

Increases based on tax positions prior to 2011

     22        15        -        1   

Decreases based on tax positions prior to 2011

     (125     (63     (41     (12

Increases based on tax positions related to 2011

     17        13        -        1   

Changes related to settlements with taxing authorities

     (10     (5     (4     -   

Decreases related to the lapse of statute of limitations

     (2     -        -        (1

Unrecognized tax benefits – December 31, 2011

   $ 148      $ 124      $     11      $ 9   

Total unrecognized tax benefits (detriments) that, if recognized, would affect the effective tax rates as of December 31, 2009

   $ 6      $ 3      $ -      $ -   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2010

   $ -      $ 3      $ -      $ 1   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2011

   $ 1      $ 1      $ -      $ 1   

The Ameren Companies recognize interest charges (income) and penalties accrued on tax liabilities on a pretax basis as interest charges (income) or miscellaneous expense in the statements of income.

 

A reconciliation of the change in the liability for interest on unrecognized tax benefits during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren    

Ameren

Missouri

   

Ameren

Illinois

    Genco  

Liability for interest – January 1, 2009

   $ 10      $ 2      $ -      $ 4   

Interest charges (income) for 2009

     (2     2        -        (2

Liability for interest – December 31, 2009

   $ 8      $ 4      $ -      $ 2   

Interest charges for 2010

     9        6        2        -   

Liability for interest – December 31, 2010

   $ 17      $     10      $ 2      $ 2   

Interest income for 2011

     (11     (3     (1     (1

Interest payment

     (1     (1     -        -   

Liability for interest – December 31, 2011

   $     5      $ 6      $     1      $     1   

As of December 31, 2009, December 31, 2010, and December 31, 2011, the Ameren Companies have accrued no amount for penalties with respect to unrecognized tax benefits.

In the second quarter of 2011, a final settlement for the years 2005 and 2006 was reached with the Internal Revenue Service. It resulted in the reduction of uncertain tax liabilities by $39 million, $17 million, $12 million, and $4 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. Ameren's federal income tax returns for the years 2007 through 2009 are before the Appeals Office of the Internal Revenue Service. Ameren's federal income tax return for the year 2010 is currently under examination.

State income tax returns are generally subject to examination for a period of three years after filing of the return. The state impact of any federal changes remains subject to examination by various states for a period of up to one year after formal notification to the states. The Ameren Companies do not currently have material state income tax issues under examination, administrative appeals, or litigation.

It is expected that a partial settlement will be reached with the Appeals Office of the Internal Revenue Service in the next twelve months for the years 2007 through 2009 that would result in a decrease in uncertain tax liabilities. In addition, it is reasonably possible that other events will occur during the next 12 months that would cause the total amount of unrecognized tax benefits for the Ameren Companies to increase or decrease. However, the Ameren Companies do not believe any such increases or decreases would be material to their results of operations, financial position, or liquidity.

NOTE 13 – INCOME TAXES

The following table presents the principal reasons why the effective income tax rate differed from the statutory federal income tax rate for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Production activities deduction

     -        -        -        3   

Depreciation differences

     (1     (2     -        -   

Amortization of investment tax credit

     (1     (1     (1     (1

State tax

     4        3        5        6   

Tax credits

     -        -        -        (1

Other permanent items(a)

     -        1        -        -   

Effective income tax rate

     37     36     39     42

2010:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Non-deductible impairment of goodwill

     32        -        -        (144

Production activities deduction

     -        -        -        7   

Depreciation differences

     (4     (3     -        -   

Amortization of investment tax credit

     (2     (1     (1     4   

State tax

     8        3        5        (14

Reserve for uncertain tax positions

     (1     -        -        (6

Tax credits

     (3     -        -        13   

Change in federal tax law(b)

     3        1        -        (19

Other permanent items(c)

     -        -        -        (1

Effective income tax rate

     68     35     39     (125 )% 

2009:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Depreciation differences

     (1     (3     (1     -   

Amortization of investment tax credit

     (1     (1     (1     -   

State tax

     5        3        5        4   

Reserve for uncertain tax positions

     (1     -        -        -   

Other permanent items(d)

     (1     -        (1     (1

Tax credits

     (1     (1     -        -   

Effective income tax rate

     35     33     37     38

 

(a) Permanent items are treated differently for book and tax purposes and primarily include nondeductible expenses related to lobbying and stock issuance expenses for Ameren Missouri.
(b) Relates to change in taxation of prescription drug benefits to retiree participants from the enactment in 2010 of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Bill of 2010.
(c) Permanent items are treated differently for book and tax purposes and primarily include nondeductible expenses for Genco.
(d) Permanent items are treated differently for book and tax purposes and primarily include Internal Revenue Code Section 199 production activity deductions for Ameren and Genco, company-owned life insurance for Ameren and Ameren Illinois, employee stock ownership plan dividends for Ameren, and nondeductible expenses for Ameren Illinois.

 

The following table presents the components of income tax expense (benefit) for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Current taxes:

        

Federal

   $ (27   $ 3      $ (24   $ (21

State

     (5     2        (4     (7

Deferred taxes:

        

Federal

     273        129        123        43   

State

     76        31        34        18   

Deferred investment tax credits, amortization

     (7     (4     (2     (1

Total income tax expense

   $ 310      $ 161      $ 127      $ 32   

2010:

        

Current taxes:

        

Federal

   $ 13      $ (14   $ (20   $ (5

State

     10        (15     (5     6   

Deferred taxes:

        

Federal

     274        206        132        22   

State

     36        27        32        (2

Deferred investment tax credits, amortization

     (8     (5     (2     (1

Total income tax expense

   $ 325      $ 199      $ 137      $ 20   

2009:

        

Current taxes:

        

Federal

   $ (73   $ (117   $ (8   $ 22   

State

     3        (31     14        14   

Deferred taxes:

        

Federal

     337        239        64        57   

State

     74        42        11        9   

Deferred investment tax credits, amortization

     (9     (5     (2     (1

Total income tax expense

   $ 332      $ 128      $ 79      $ 101   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

The Illinois corporate income tax rate increased from 7.3% to 9.5%, starting in January 2011. The tax rate is scheduled to decrease to 7.75% in 2015, and it is scheduled to return to 7.3% in 2025. This corporate income tax rate increase in Illinois increased current income tax expense in 2011 by $6 million, $4 million and $3 million for Ameren, Ameren Illinois and Genco, respectively. As a result of this corporate income tax rate increase, accumulated deferred tax balances were revalued, resulting in a decrease in deferred tax expense of $2 million, $3 million and $- million for Ameren, Ameren Illinois, and Genco, respectively.

The following table presents the deferred tax assets and deferred tax liabilities recorded as a result of temporary differences at December 31, 2011, and 2010:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,811      $ 2,134      $ 1,003      $ 457   

Deferred intercompany tax gain/basis step-up

     3        (1     55        (54

Regulatory assets, net

     73        73        -        -   

Deferred employee benefit costs

     (367     (88     (109     (67

Purchase accounting

     35        -        (27     15   

ARO

     (37     -        1        (25

Other

     (223     6        (86     (22

Total net accumulated deferred income tax liabilities(b)

   $ 3,295      $ 2,124      $ 837      $ 304   

2010:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,310      $ 1,974      $ 750      $ 378   

Deferred intercompany tax gain/basis step-up

     2        (2     71        (68

Regulatory assets (liabilities), net

     67        68        (1     -   

Deferred employee benefit costs

     (360     (87     (124     (45

Purchase accounting

     106        -        41        17   

ARO

     (48     (9     1        (27

Other

     (120     7        (57     10   

Total net accumulated deferred income tax liabilities(c)

   $ 2,957      $ 1,951      $ 681      $ 265   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Includes $20 million, $8 million and $58 million as current assets recorded in the balance sheet for Ameren, Ameren Missouri and Ameren Illinois, respectively.
(c) Includes $43 million as current assets recorded in the balance sheet for Ameren Illinois. Includes $71 million, $43 million and $12 million as current liabilities recorded in the balance sheets for Ameren, Ameren Missouri and Genco, respectively.

The following table presents the components of deferred tax assets relating to net operating loss carryforwards and tax credit carryforwards at December 31, 2011:

 

      Ameren      Ameren Missouri      Ameren Illinois      Genco  

Net operating loss carryforwards:

           

Federal(a)

   $ 136       $ 50       $ 33       $ 8   

State(b)

     17         3         6         -   

Total net operating loss carryforwards

   $ 153       $ 53       $ 39       $ 8   

Tax credit carryforwards:

           

Federal(c)

   $ 72       $ 11       $ -       $ 1   

State(d)

     28         1         -         4   

Total tax credit carryforwards

   $ 100       $ 12       $ -       $ 5   

 

(a) These will begin to expire in 2028.
(b) These will begin to expire in 2017.
(c) These will begin to expire in 2029.
(d) These will begin to expire in 2012.

Uncertain Tax Positions

A reconciliation of the change in the unrecognized tax benefit balance during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

Unrecognized tax benefits – January 1, 2009

   $     110      $                     20      $ -      $ 48   

Increases based on tax positions prior to 2009

     90        76        -        9   

Decreases based on tax positions prior to 2009

     (84     (19     -        (31

Increases based on tax positions related to 2009

     19        11        -        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2009

   $ 135      $ 88      $ -      $ 29   

Increases based on tax positions prior to 2010

     72        40        27        4   

Decreases based on tax positions prior to 2010

     (38     (12     (2     (16

Increases based on tax positions related to 2010

     77        48        31        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2010

   $ 246      $ 164      $ 56      $     20   

Increases based on tax positions prior to 2011

     22        15        -        1   

Decreases based on tax positions prior to 2011

     (125     (63     (41     (12

Increases based on tax positions related to 2011

     17        13        -        1   

Changes related to settlements with taxing authorities

     (10     (5     (4     -   

Decreases related to the lapse of statute of limitations

     (2     -        -        (1

Unrecognized tax benefits – December 31, 2011

   $ 148      $ 124      $     11      $ 9   

Total unrecognized tax benefits (detriments) that, if recognized, would affect the effective tax rates as of December 31, 2009

   $ 6      $ 3      $ -      $ -   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2010

   $ -      $ 3      $ -      $ 1   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2011

   $ 1      $ 1      $ -      $ 1   

The Ameren Companies recognize interest charges (income) and penalties accrued on tax liabilities on a pretax basis as interest charges (income) or miscellaneous expense in the statements of income.

 

A reconciliation of the change in the liability for interest on unrecognized tax benefits during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren    

Ameren

Missouri

   

Ameren

Illinois

    Genco  

Liability for interest – January 1, 2009

   $ 10      $ 2      $ -      $ 4   

Interest charges (income) for 2009

     (2     2        -        (2

Liability for interest – December 31, 2009

   $ 8      $ 4      $ -      $ 2   

Interest charges for 2010

     9        6        2        -   

Liability for interest – December 31, 2010

   $ 17      $     10      $ 2      $ 2   

Interest income for 2011

     (11     (3     (1     (1

Interest payment

     (1     (1     -        -   

Liability for interest – December 31, 2011

   $     5      $ 6      $     1      $     1   

As of December 31, 2009, December 31, 2010, and December 31, 2011, the Ameren Companies have accrued no amount for penalties with respect to unrecognized tax benefits.

In the second quarter of 2011, a final settlement for the years 2005 and 2006 was reached with the Internal Revenue Service. It resulted in the reduction of uncertain tax liabilities by $39 million, $17 million, $12 million, and $4 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. Ameren's federal income tax returns for the years 2007 through 2009 are before the Appeals Office of the Internal Revenue Service. Ameren's federal income tax return for the year 2010 is currently under examination.

State income tax returns are generally subject to examination for a period of three years after filing of the return. The state impact of any federal changes remains subject to examination by various states for a period of up to one year after formal notification to the states. The Ameren Companies do not currently have material state income tax issues under examination, administrative appeals, or litigation.

It is expected that a partial settlement will be reached with the Appeals Office of the Internal Revenue Service in the next twelve months for the years 2007 through 2009 that would result in a decrease in uncertain tax liabilities. In addition, it is reasonably possible that other events will occur during the next 12 months that would cause the total amount of unrecognized tax benefits for the Ameren Companies to increase or decrease. However, the Ameren Companies do not believe any such increases or decreases would be material to their results of operations, financial position, or liquidity.

NOTE 13 – INCOME TAXES

The following table presents the principal reasons why the effective income tax rate differed from the statutory federal income tax rate for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Production activities deduction

     -        -        -        3   

Depreciation differences

     (1     (2     -        -   

Amortization of investment tax credit

     (1     (1     (1     (1

State tax

     4        3        5        6   

Tax credits

     -        -        -        (1

Other permanent items(a)

     -        1        -        -   

Effective income tax rate

     37     36     39     42

2010:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Non-deductible impairment of goodwill

     32        -        -        (144

Production activities deduction

     -        -        -        7   

Depreciation differences

     (4     (3     -        -   

Amortization of investment tax credit

     (2     (1     (1     4   

State tax

     8        3        5        (14

Reserve for uncertain tax positions

     (1     -        -        (6

Tax credits

     (3     -        -        13   

Change in federal tax law(b)

     3        1        -        (19

Other permanent items(c)

     -        -        -        (1

Effective income tax rate

     68     35     39     (125 )% 

2009:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Depreciation differences

     (1     (3     (1     -   

Amortization of investment tax credit

     (1     (1     (1     -   

State tax

     5        3        5        4   

Reserve for uncertain tax positions

     (1     -        -        -   

Other permanent items(d)

     (1     -        (1     (1

Tax credits

     (1     (1     -        -   

Effective income tax rate

     35     33     37     38

 

(a) Permanent items are treated differently for book and tax purposes and primarily include nondeductible expenses related to lobbying and stock issuance expenses for Ameren Missouri.
(b) Relates to change in taxation of prescription drug benefits to retiree participants from the enactment in 2010 of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Bill of 2010.
(c) Permanent items are treated differently for book and tax purposes and primarily include nondeductible expenses for Genco.
(d) Permanent items are treated differently for book and tax purposes and primarily include Internal Revenue Code Section 199 production activity deductions for Ameren and Genco, company-owned life insurance for Ameren and Ameren Illinois, employee stock ownership plan dividends for Ameren, and nondeductible expenses for Ameren Illinois.

 

The following table presents the components of income tax expense (benefit) for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Current taxes:

        

Federal

   $ (27   $ 3      $ (24   $ (21

State

     (5     2        (4     (7

Deferred taxes:

        

Federal

     273        129        123        43   

State

     76        31        34        18   

Deferred investment tax credits, amortization

     (7     (4     (2     (1

Total income tax expense

   $ 310      $ 161      $ 127      $ 32   

2010:

        

Current taxes:

        

Federal

   $ 13      $ (14   $ (20   $ (5

State

     10        (15     (5     6   

Deferred taxes:

        

Federal

     274        206        132        22   

State

     36        27        32        (2

Deferred investment tax credits, amortization

     (8     (5     (2     (1

Total income tax expense

   $ 325      $ 199      $ 137      $ 20   

2009:

        

Current taxes:

        

Federal

   $ (73   $ (117   $ (8   $ 22   

State

     3        (31     14        14   

Deferred taxes:

        

Federal

     337        239        64        57   

State

     74        42        11        9   

Deferred investment tax credits, amortization

     (9     (5     (2     (1

Total income tax expense

   $ 332      $ 128      $ 79      $ 101   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

The Illinois corporate income tax rate increased from 7.3% to 9.5%, starting in January 2011. The tax rate is scheduled to decrease to 7.75% in 2015, and it is scheduled to return to 7.3% in 2025. This corporate income tax rate increase in Illinois increased current income tax expense in 2011 by $6 million, $4 million and $3 million for Ameren, Ameren Illinois and Genco, respectively. As a result of this corporate income tax rate increase, accumulated deferred tax balances were revalued, resulting in a decrease in deferred tax expense of $2 million, $3 million and $- million for Ameren, Ameren Illinois, and Genco, respectively.

The following table presents the deferred tax assets and deferred tax liabilities recorded as a result of temporary differences at December 31, 2011, and 2010:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,811      $ 2,134      $ 1,003      $ 457   

Deferred intercompany tax gain/basis step-up

     3        (1     55        (54

Regulatory assets, net

     73        73        -        -   

Deferred employee benefit costs

     (367     (88     (109     (67

Purchase accounting

     35        -        (27     15   

ARO

     (37     -        1        (25

Other

     (223     6        (86     (22

Total net accumulated deferred income tax liabilities(b)

   $ 3,295      $ 2,124      $ 837      $ 304   

2010:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,310      $ 1,974      $ 750      $ 378   

Deferred intercompany tax gain/basis step-up

     2        (2     71        (68

Regulatory assets (liabilities), net

     67        68        (1     -   

Deferred employee benefit costs

     (360     (87     (124     (45

Purchase accounting

     106        -        41        17   

ARO

     (48     (9     1        (27

Other

     (120     7        (57     10   

Total net accumulated deferred income tax liabilities(c)

   $ 2,957      $ 1,951      $ 681      $ 265   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Includes $20 million, $8 million and $58 million as current assets recorded in the balance sheet for Ameren, Ameren Missouri and Ameren Illinois, respectively.
(c) Includes $43 million as current assets recorded in the balance sheet for Ameren Illinois. Includes $71 million, $43 million and $12 million as current liabilities recorded in the balance sheets for Ameren, Ameren Missouri and Genco, respectively.

The following table presents the components of deferred tax assets relating to net operating loss carryforwards and tax credit carryforwards at December 31, 2011:

 

      Ameren      Ameren Missouri      Ameren Illinois      Genco  

Net operating loss carryforwards:

           

Federal(a)

   $ 136       $ 50       $ 33       $ 8   

State(b)

     17         3         6         -   

Total net operating loss carryforwards

   $ 153       $ 53       $ 39       $ 8   

Tax credit carryforwards:

           

Federal(c)

   $ 72       $ 11       $ -       $ 1   

State(d)

     28         1         -         4   

Total tax credit carryforwards

   $ 100       $ 12       $ -       $ 5   

 

(a) These will begin to expire in 2028.
(b) These will begin to expire in 2017.
(c) These will begin to expire in 2029.
(d) These will begin to expire in 2012.

Uncertain Tax Positions

A reconciliation of the change in the unrecognized tax benefit balance during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

Unrecognized tax benefits – January 1, 2009

   $     110      $                     20      $ -      $ 48   

Increases based on tax positions prior to 2009

     90        76        -        9   

Decreases based on tax positions prior to 2009

     (84     (19     -        (31

Increases based on tax positions related to 2009

     19        11        -        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2009

   $ 135      $ 88      $ -      $ 29   

Increases based on tax positions prior to 2010

     72        40        27        4   

Decreases based on tax positions prior to 2010

     (38     (12     (2     (16

Increases based on tax positions related to 2010

     77        48        31        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2010

   $ 246      $ 164      $ 56      $     20   

Increases based on tax positions prior to 2011

     22        15        -        1   

Decreases based on tax positions prior to 2011

     (125     (63     (41     (12

Increases based on tax positions related to 2011

     17        13        -        1   

Changes related to settlements with taxing authorities

     (10     (5     (4     -   

Decreases related to the lapse of statute of limitations

     (2     -        -        (1

Unrecognized tax benefits – December 31, 2011

   $ 148      $ 124      $     11      $ 9   

Total unrecognized tax benefits (detriments) that, if recognized, would affect the effective tax rates as of December 31, 2009

   $ 6      $ 3      $ -      $ -   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2010

   $ -      $ 3      $ -      $ 1   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2011

   $ 1      $ 1      $ -      $ 1   

The Ameren Companies recognize interest charges (income) and penalties accrued on tax liabilities on a pretax basis as interest charges (income) or miscellaneous expense in the statements of income.

 

A reconciliation of the change in the liability for interest on unrecognized tax benefits during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren    

Ameren

Missouri

   

Ameren

Illinois

    Genco  

Liability for interest – January 1, 2009

   $ 10      $ 2      $ -      $ 4   

Interest charges (income) for 2009

     (2     2        -        (2

Liability for interest – December 31, 2009

   $ 8      $ 4      $ -      $ 2   

Interest charges for 2010

     9        6        2        -   

Liability for interest – December 31, 2010

   $ 17      $     10      $ 2      $ 2   

Interest income for 2011

     (11     (3     (1     (1

Interest payment

     (1     (1     -        -   

Liability for interest – December 31, 2011

   $     5      $ 6      $     1      $     1   

As of December 31, 2009, December 31, 2010, and December 31, 2011, the Ameren Companies have accrued no amount for penalties with respect to unrecognized tax benefits.

In the second quarter of 2011, a final settlement for the years 2005 and 2006 was reached with the Internal Revenue Service. It resulted in the reduction of uncertain tax liabilities by $39 million, $17 million, $12 million, and $4 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. Ameren's federal income tax returns for the years 2007 through 2009 are before the Appeals Office of the Internal Revenue Service. Ameren's federal income tax return for the year 2010 is currently under examination.

State income tax returns are generally subject to examination for a period of three years after filing of the return. The state impact of any federal changes remains subject to examination by various states for a period of up to one year after formal notification to the states. The Ameren Companies do not currently have material state income tax issues under examination, administrative appeals, or litigation.

It is expected that a partial settlement will be reached with the Appeals Office of the Internal Revenue Service in the next twelve months for the years 2007 through 2009 that would result in a decrease in uncertain tax liabilities. In addition, it is reasonably possible that other events will occur during the next 12 months that would cause the total amount of unrecognized tax benefits for the Ameren Companies to increase or decrease. However, the Ameren Companies do not believe any such increases or decreases would be material to their results of operations, financial position, or liquidity.

NOTE 13 – INCOME TAXES

The following table presents the principal reasons why the effective income tax rate differed from the statutory federal income tax rate for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Production activities deduction

     -        -        -        3   

Depreciation differences

     (1     (2     -        -   

Amortization of investment tax credit

     (1     (1     (1     (1

State tax

     4        3        5        6   

Tax credits

     -        -        -        (1

Other permanent items(a)

     -        1        -        -   

Effective income tax rate

     37     36     39     42

2010:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Non-deductible impairment of goodwill

     32        -        -        (144

Production activities deduction

     -        -        -        7   

Depreciation differences

     (4     (3     -        -   

Amortization of investment tax credit

     (2     (1     (1     4   

State tax

     8        3        5        (14

Reserve for uncertain tax positions

     (1     -        -        (6

Tax credits

     (3     -        -        13   

Change in federal tax law(b)

     3        1        -        (19

Other permanent items(c)

     -        -        -        (1

Effective income tax rate

     68     35     39     (125 )% 

2009:

        

Statutory federal income tax rate:

     35     35     35     35

Increases (decreases) from:

        

Depreciation differences

     (1     (3     (1     -   

Amortization of investment tax credit

     (1     (1     (1     -   

State tax

     5        3        5        4   

Reserve for uncertain tax positions

     (1     -        -        -   

Other permanent items(d)

     (1     -        (1     (1

Tax credits

     (1     (1     -        -   

Effective income tax rate

     35     33     37     38

 

(a) Permanent items are treated differently for book and tax purposes and primarily include nondeductible expenses related to lobbying and stock issuance expenses for Ameren Missouri.
(b) Relates to change in taxation of prescription drug benefits to retiree participants from the enactment in 2010 of the Patient Protection and Affordable Care Act and the Health Care and Education Reconciliation Bill of 2010.
(c) Permanent items are treated differently for book and tax purposes and primarily include nondeductible expenses for Genco.
(d) Permanent items are treated differently for book and tax purposes and primarily include Internal Revenue Code Section 199 production activity deductions for Ameren and Genco, company-owned life insurance for Ameren and Ameren Illinois, employee stock ownership plan dividends for Ameren, and nondeductible expenses for Ameren Illinois.

 

The following table presents the components of income tax expense (benefit) for the years ended December 31, 2011, 2010, and 2009:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Current taxes:

        

Federal

   $ (27   $ 3      $ (24   $ (21

State

     (5     2        (4     (7

Deferred taxes:

        

Federal

     273        129        123        43   

State

     76        31        34        18   

Deferred investment tax credits, amortization

     (7     (4     (2     (1

Total income tax expense

   $ 310      $ 161      $ 127      $ 32   

2010:

        

Current taxes:

        

Federal

   $ 13      $ (14   $ (20   $ (5

State

     10        (15     (5     6   

Deferred taxes:

        

Federal

     274        206        132        22   

State

     36        27        32        (2

Deferred investment tax credits, amortization

     (8     (5     (2     (1

Total income tax expense

   $ 325      $ 199      $ 137      $ 20   

2009:

        

Current taxes:

        

Federal

   $ (73   $ (117   $ (8   $ 22   

State

     3        (31     14        14   

Deferred taxes:

        

Federal

     337        239        64        57   

State

     74        42        11        9   

Deferred investment tax credits, amortization

     (9     (5     (2     (1

Total income tax expense

   $ 332      $ 128      $ 79      $ 101   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

The Illinois corporate income tax rate increased from 7.3% to 9.5%, starting in January 2011. The tax rate is scheduled to decrease to 7.75% in 2015, and it is scheduled to return to 7.3% in 2025. This corporate income tax rate increase in Illinois increased current income tax expense in 2011 by $6 million, $4 million and $3 million for Ameren, Ameren Illinois and Genco, respectively. As a result of this corporate income tax rate increase, accumulated deferred tax balances were revalued, resulting in a decrease in deferred tax expense of $2 million, $3 million and $- million for Ameren, Ameren Illinois, and Genco, respectively.

The following table presents the deferred tax assets and deferred tax liabilities recorded as a result of temporary differences at December 31, 2011, and 2010:

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,811      $ 2,134      $ 1,003      $ 457   

Deferred intercompany tax gain/basis step-up

     3        (1     55        (54

Regulatory assets, net

     73        73        -        -   

Deferred employee benefit costs

     (367     (88     (109     (67

Purchase accounting

     35        -        (27     15   

ARO

     (37     -        1        (25

Other

     (223     6        (86     (22

Total net accumulated deferred income tax liabilities(b)

   $ 3,295      $ 2,124      $ 837      $ 304   

2010:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,310      $ 1,974      $ 750      $ 378   

Deferred intercompany tax gain/basis step-up

     2        (2     71        (68

Regulatory assets (liabilities), net

     67        68        (1     -   

Deferred employee benefit costs

     (360     (87     (124     (45

Purchase accounting

     106        -        41        17   

ARO

     (48     (9     1        (27

Other

     (120     7        (57     10   

Total net accumulated deferred income tax liabilities(c)

   $ 2,957      $ 1,951      $ 681      $ 265   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Includes $20 million, $8 million and $58 million as current assets recorded in the balance sheet for Ameren, Ameren Missouri and Ameren Illinois, respectively.
(c) Includes $43 million as current assets recorded in the balance sheet for Ameren Illinois. Includes $71 million, $43 million and $12 million as current liabilities recorded in the balance sheets for Ameren, Ameren Missouri and Genco, respectively.

The following table presents the components of deferred tax assets relating to net operating loss carryforwards and tax credit carryforwards at December 31, 2011:

 

      Ameren      Ameren Missouri      Ameren Illinois      Genco  

Net operating loss carryforwards:

           

Federal(a)

   $ 136       $ 50       $ 33       $ 8   

State(b)

     17         3         6         -   

Total net operating loss carryforwards

   $ 153       $ 53       $ 39       $ 8   

Tax credit carryforwards:

           

Federal(c)

   $ 72       $ 11       $ -       $ 1   

State(d)

     28         1         -         4   

Total tax credit carryforwards

   $ 100       $ 12       $ -       $ 5   

 

(a) These will begin to expire in 2028.
(b) These will begin to expire in 2017.
(c) These will begin to expire in 2029.
(d) These will begin to expire in 2012.

Uncertain Tax Positions

A reconciliation of the change in the unrecognized tax benefit balance during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren     Ameren Missouri     Ameren Illinois     Genco  

Unrecognized tax benefits – January 1, 2009

   $     110      $                     20      $ -      $ 48   

Increases based on tax positions prior to 2009

     90        76        -        9   

Decreases based on tax positions prior to 2009

     (84     (19     -        (31

Increases based on tax positions related to 2009

     19        11        -        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2009

   $ 135      $ 88      $ -      $ 29   

Increases based on tax positions prior to 2010

     72        40        27        4   

Decreases based on tax positions prior to 2010

     (38     (12     (2     (16

Increases based on tax positions related to 2010

     77        48        31        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2010

   $ 246      $ 164      $ 56      $     20   

Increases based on tax positions prior to 2011

     22        15        -        1   

Decreases based on tax positions prior to 2011

     (125     (63     (41     (12

Increases based on tax positions related to 2011

     17        13        -        1   

Changes related to settlements with taxing authorities

     (10     (5     (4     -   

Decreases related to the lapse of statute of limitations

     (2     -        -        (1

Unrecognized tax benefits – December 31, 2011

   $ 148      $ 124      $     11      $ 9   

Total unrecognized tax benefits (detriments) that, if recognized, would affect the effective tax rates as of December 31, 2009

   $ 6      $ 3      $ -      $ -   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2010

   $ -      $ 3      $ -      $ 1   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2011

   $ 1      $ 1      $ -      $ 1   

The Ameren Companies recognize interest charges (income) and penalties accrued on tax liabilities on a pretax basis as interest charges (income) or miscellaneous expense in the statements of income.

 

A reconciliation of the change in the liability for interest on unrecognized tax benefits during the years ended December 31, 2009, 2010, and 2011, is as follows:

 

      Ameren    

Ameren

Missouri

   

Ameren

Illinois

    Genco  

Liability for interest – January 1, 2009

   $ 10      $ 2      $ -      $ 4   

Interest charges (income) for 2009

     (2     2        -        (2

Liability for interest – December 31, 2009

   $ 8      $ 4      $ -      $ 2   

Interest charges for 2010

     9        6        2        -   

Liability for interest – December 31, 2010

   $ 17      $     10      $ 2      $ 2   

Interest income for 2011

     (11     (3     (1     (1

Interest payment

     (1     (1     -        -   

Liability for interest – December 31, 2011

   $     5      $ 6      $     1      $     1   

As of December 31, 2009, December 31, 2010, and December 31, 2011, the Ameren Companies have accrued no amount for penalties with respect to unrecognized tax benefits.

In the second quarter of 2011, a final settlement for the years 2005 and 2006 was reached with the Internal Revenue Service. It resulted in the reduction of uncertain tax liabilities by $39 million, $17 million, $12 million, and $4 million for Ameren, Ameren Missouri, Ameren Illinois and Genco, respectively. Ameren's federal income tax returns for the years 2007 through 2009 are before the Appeals Office of the Internal Revenue Service. Ameren's federal income tax return for the year 2010 is currently under examination.

State income tax returns are generally subject to examination for a period of three years after filing of the return. The state impact of any federal changes remains subject to examination by various states for a period of up to one year after formal notification to the states. The Ameren Companies do not currently have material state income tax issues under examination, administrative appeals, or litigation.

It is expected that a partial settlement will be reached with the Appeals Office of the Internal Revenue Service in the next twelve months for the years 2007 through 2009 that would result in a decrease in uncertain tax liabilities. In addition, it is reasonably possible that other events will occur during the next 12 months that would cause the total amount of unrecognized tax benefits for the Ameren Companies to increase or decrease. However, the Ameren Companies do not believe any such increases or decreases would be material to their results of operations, financial position, or liquidity.

Related Party Transactions

NOTE 14 – RELATED PARTY TRANSACTIONS

The Ameren Companies have engaged in, and may in the future engage in, affiliate transactions in the normal course of business. These transactions primarily consist of natural gas and power purchases and sales, services received or rendered, and borrowings and lendings. Transactions between affiliates are reported as intercompany transactions on their financial statements, but are eliminated in consolidation for Ameren's financial statements. Below are the material related party agreements.

Electric Power Supply Agreements

Genco Power Supply Agreements

The following table presents the amount of physical gigawatthour sales under Genco's related party electric power supply agreements with Marketing Company, including EEI's power supply agreement with Marketing Company, for the years ended December 31, 2011, 2010, and 2009:

 

     December 31,  
     2011     2010     2009  

Genco sales to Marketing Company

    21,040        21,656        19,598   

 

Genco entered into a power supply agreement, as amended (PSA), with Marketing Company, whereby Genco agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from Genco's generation fleet. Marketing Company entered into a similar PSA with AERG. Under the PSAs, revenues allocated between Genco and AERG are based on reimbursable expenses and generation. Each PSA will continue through December 31, 2022, and from year to year thereafter unless either party to the respective PSA elects to terminate the PSA by providing the other party with no less than six months advance written notice.

In December 2005, EEI entered into a PSA with Marketing Company, whereby EEI agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from EEI's generation fleet. The price that Marketing Company pays for capacity is set annually based upon prevailing market prices. Marketing Company pays spot market prices for the associated energy. In addition, EEI will at times purchase energy from Marketing Company to fulfill obligations to a nonaffiliated party. This PSA will continue through May 31, 2016, unless either party elects to terminate the PSA by providing the other party with no less than four years advance written notice or five days' written notice in the event of a default, unless the default is cured within 30 business days.

 

Capacity Supply Agreements

Ameren Illinois, as an electric load-serving entity, must acquire capacity sufficient to meet its obligations to customers.

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary capacity requirements for the period from June 1, 2008, through May 31, 2009. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFPs. Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements for $6 million. In addition, Ameren Missouri contracted to supply a portion of the Ameren Illinois' capacity for $1 million.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2009, through May 31, 2012. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2009, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $4 million, $9 million, and $8 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively. In April 2009, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $2 million, $2 million, and $1 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2010, through May 31, 2013. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2010, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $1 million, $2 million, and $3 million for the 12 months ending May 31, 2011, 2012, and 2013, respectively. In April 2010, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for less than $1 million for the period from June 1, 2010, through May 31, 2013.

Energy Swaps and Energy Products

Ameren Illinois, as an electric load-serving entity, must acquire energy sufficient to meet its obligations to customers.

As part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company (for the benefit of Genco and AERG) to lock in energy prices for 400 to 1,000 megawatts annually of its round-the-clock power requirements during the period June 1, 2008, to December 31, 2012, at then-relevant market prices. These financial contracts do not include capacity, are not load-following products, and do not involve the physical delivery of energy. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives subject to regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities for Ameren Illinois and OCI at Marketing Company. See Note 7 – Derivative Financial Instruments for additional information on these derivatives. Below are the remaining contracted volumes and prices per megawatthour as of December 31, 2011:

 

Period   Volume     Price per
Megawatthour
 

January 1, 2012 – December 31, 2012

    1,000 MW      $ 53.08   

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary financial energy swaps required for the period from June 1, 2008, through May 31, 2009. Marketing Company was a winning supplier in Ameren Illinois' energy swap RFP process. Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for about 2 million megawatthours at approximately $60 per megawatthour.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps from June 1, 2009, through May 31, 2011. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2009, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for approximately 80,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2010, and for approximately 89,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2011.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps for the period from June 1, 2010, through May 31, 2013. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2010, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois will pay for approximately 924,000 megawatthours at approximately $33 per megawatthour during the 12 months ending May 31, 2011, and for approximately 296,000 megawatthours at approximately $40 per megawatthour during the 12 months ending May 31, 2012.

Energy Products

In 2011, Ameren Illinois used a RFP process administered by the IPA to procure energy products that will settle physically from June 1, 2011, through May 31, 2014. Marketing Company and Ameren Missouri were winning suppliers in Ameren Illinois' energy product RFP process. In May 2011, Marketing Company and Ameren Illinois entered into energy product agreements by which Marketing Company will sell and Ameren Illinois will purchase approximately 1,747,200 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 1,840,800 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2013, and approximately 650,000 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2014. In May 2011, Ameren Missouri and Ameren Illinois entered into energy product agreements by which Ameren Missouri will sell and Ameren Illinois will purchase approximately 16,800 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 40,800 megawatthours at approximately $29 per megawatthour during the 12 months ending May 31, 2013, and approximately 40,800 megawatthours at approximately $28 per megawatthour during the 12 months ending May 31, 2014. The 2012 and 2013 energy product agreements between Ameren Missouri and Ameren Illinois are for off-peak hours only.

In February 2012, a rate stability procurement for energy products that will settle physically was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Marketing Company was a winning supplier in Ameren Illinois' energy product procurement process. In February 2012, Marketing Company and Ameren Illinois entered into energy product agreements pursuant to which Marketing Company will sell and Ameren Illinois will purchase approximately 3,942,000 megawatthours at approximately $30 per megawatthour during the 12 months ending May 31, 2014, approximately 3,504,000 megawatthours at approximately $32 per megawatthour during the 12 months ending May 31, 2015, and approximately 1,317,600 megawatthours at approximately $34 per megawatthour during the 12 months ending May 31, 2016. The energy product agreements were based on around-the-clock prices.

Interconnection and Transmission Agreements

Ameren Missouri and Ameren Illinois are parties to an interconnection agreement for the use of their respective transmission lines and other facilities for the distribution of power. These agreements have no contractual expiration date, but may be terminated by either party with three years' notice.

Joint Ownership Agreement

ATXI and Ameren Illinois have a joint ownership agreement to construct, own, operate, and maintain certain electric transmission assets in Illinois. Under the terms of this agreement, Ameren Illinois and ATXI are responsible for their applicable share of all costs related to the construction, operation, and maintenance of electric transmission systems. Ameren is the primary beneficiary of ATXI, and therefore consolidates ATXI. Currently, there are no construction projects or joint ownership of existing assets under this agreement.

 

In January 2011, ATXI repaid advances for the construction of transmission assets to Ameren Illinois in the amount of $52 million, including $3 million of accrued interest.

In March 2011, Ameren Illinois and ATXI signed an agreement to transfer, at cost, all of ATXI's construction work in progress assets related to the construction of a transmission line to Ameren Illinois for $20 million. In April 2011, Ameren Illinois paid ATXI for these assets.

Support Services Agreements

Ameren Services provides support services to its affiliates. The costs of support services, including wages, employee benefits, professional services, and other expenses, are based on, or are an allocation of, actual costs incurred. AFS provided support services to its affiliates through December 31, 2010. Effective January 1, 2011, the services previously performed by AFS are performed within the Ameren Missouri, Ameren Illinois and Merchant Generation business segments. In addition, Ameren Missouri, Ameren Illinois and Genco provide affiliates, primarily Ameren Services, with access to their facilities for administrative purposes. The cost of the rent and facility services are based on, or are an allocation of, actual costs incurred.

Gas Sales and Transportation Agreement

Under a gas transportation agreement, Genco acquires gas transportation service from Ameren Missouri. This agreement expires in February 2016.

Money Pools

See Note 5 – Long-term Debt and Equity Financings for discussion of affiliate borrowing arrangements.

Collateral Postings

Under the terms of the 2011, 2010, and 2009 Illinois power procurement agreements entered into through a RFP process administered by the IPA, suppliers must post collateral under certain market conditions to protect Ameren Illinois in the event of nonperformance. The collateral postings are unilateral, meaning that only the suppliers would be required to post collateral. Therefore, Ameren Missouri, as a winning supplier of capacity and energy products, and Marketing Company, as a winning supplier of capacity, financial energy swaps, and energy products, may be required to post collateral. As of December 31, 2011, and 2010, there were no collateral postings required of Ameren Missouri or Marketing Company related to the 2011, 2010, and 2009 Illinois power procurement agreements.

Intercompany Transfers

On October 1, 2010, Ameren Illinois distributed AERG's common stock to Ameren in connection with the Ameren Illinois Merger. Ameren subsequently contributed the AERG common stock to AER. The distribution of AERG

common stock was accounted for as a transaction between entities under common control; therefore, Ameren Illinois transferred AERG to Ameren based on AERG's carrying

value. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

The following table presents the impact on Ameren Missouri, Ameren Illinois and Genco, of related party transactions for the years ended December 31, 2011, 2010, and 2009. It is based primarily on the agreements discussed above and the money pool arrangements discussed in Note 4 – Short-Term Debt and Liquidity.

 

Agreement    Income Statement Line Item                                Ameren
Missouri
    Ameren
Illinois
    Genco  

Genco and EEI power supply

   Operating Revenues      2011       $ (a   $ (a   $   1,006   

agreements with Marketing Company

        2010         (a     (a     1,059   
            2009         (a     (a     1,071   

Ameren Missouri power supply agreements

   Operating Revenues      2011         2        (a     (a

with Ameren Illinois

        2010         2        (a     (a
            2009         3        (a     (a

Ameren Missouri and Genco gas

   Operating Revenues      2011         1        (a     (a

transportation agreement

        2010         1        (a     (a
            2009         1        (a     (a

Genco gas sales to Medina Valley

   Operating Revenues      2011         (a     (a     3   
        2010         (a     (a     2   
            2009         (a     (a     1   

Genco gas sales to distribution companies

   Operating Revenues      2011         (a     (a     -   
        2010         (a     (a     1   
            2009         (a     (a     2   

Ameren Missouri, Ameren Illinois

   Operating Revenues      2011               16        1        -   

and Genco rent and facility services

        2010         16        1        1   
            2009         18        1        1   

Total Operating Revenues

        2011       $       19      $ 1      $ 1,009   
        2010         19        1        1,063   
            2009         22        1        1,075   

Ameren Missouri and Genco gas

   Fuel      2011       $ (a   $ (a   $ 1   

transportation agreement

        2010         (a     (a     1   
            2009         (a     (a     1   

Ameren Illinois power supply agreements

   Purchased Power      2011       $ (a   $     232      $ (a

with Marketing Company

        2010         (a     233        (a
            2009         (a     400        (a

Ameren Illinois power supply

   Purchased Power      2011         (a     2        (a

agreements with Ameren Missouri

        2010         (a     2        (a
            2009         (a     3        (a

Ameren Illinois ancillary services agreement

   Purchased Power      2011         (a     -        (a

with Marketing Company

        2010         (a     -        (a
            2009         (a     (b     (a

EEI power supply agreement with

   Purchased Power      2011         (a     (a     36   

Marketing Company

        2010         (a     (a     11   
            2009         (a     (a     42   

Total Purchased Power

        2011       $ (a   $ 234      $ 37   
        2010         (a     235        12   
            2009         (a     403        43   

Gas purchases from Genco

   Gas Purchased for Resale      2011       $ (a   $ -      $ (a
        2010         (a     1        (a
            2009         (a     2        (a

Ameren Services support services

   Other Operations and      2011       $ 114      $ 90      $ 19   

agreement

  

Maintenance

     2010         128        102        23   
            2009         131        101        27   

AFS support services agreement

   Other Operations and      2011         (a     (a     (a
  

Maintenance

     2010         7        (b     3   
            2009         7        6        3   

Insurance premiums(c)

   Other Operations and      2011         (b     (a     -   
  

Maintenance

     2010         1        (a     -   
            2009         2        (a     1   

Total Other Operations and

        2011       $   114      $ 90      $    19   

Maintenance Expenses

        2010         136          102        26   
            2009         140        107        31   

Money pool borrowings (advances)

   Interest (Charges)      2011       $ -      $ -      $ (b
  

Income

     2010         -        (b     (b
            2009         -        (b     (1

 

(a) Not applicable.
(b) Amount less than $1 million.
(c) Represents insurance premiums paid to Energy Risk Assurance Company, an affiliate for replacement power, property damage, and terrorism coverage.

NOTE 14 – RELATED PARTY TRANSACTIONS

The Ameren Companies have engaged in, and may in the future engage in, affiliate transactions in the normal course of business. These transactions primarily consist of natural gas and power purchases and sales, services received or rendered, and borrowings and lendings. Transactions between affiliates are reported as intercompany transactions on their financial statements, but are eliminated in consolidation for Ameren's financial statements. Below are the material related party agreements.

Electric Power Supply Agreements

Genco Power Supply Agreements

The following table presents the amount of physical gigawatthour sales under Genco's related party electric power supply agreements with Marketing Company, including EEI's power supply agreement with Marketing Company, for the years ended December 31, 2011, 2010, and 2009:

 

     December 31,  
     2011     2010     2009  

Genco sales to Marketing Company

    21,040        21,656        19,598   

 

Genco entered into a power supply agreement, as amended (PSA), with Marketing Company, whereby Genco agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from Genco's generation fleet. Marketing Company entered into a similar PSA with AERG. Under the PSAs, revenues allocated between Genco and AERG are based on reimbursable expenses and generation. Each PSA will continue through December 31, 2022, and from year to year thereafter unless either party to the respective PSA elects to terminate the PSA by providing the other party with no less than six months advance written notice.

In December 2005, EEI entered into a PSA with Marketing Company, whereby EEI agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from EEI's generation fleet. The price that Marketing Company pays for capacity is set annually based upon prevailing market prices. Marketing Company pays spot market prices for the associated energy. In addition, EEI will at times purchase energy from Marketing Company to fulfill obligations to a nonaffiliated party. This PSA will continue through May 31, 2016, unless either party elects to terminate the PSA by providing the other party with no less than four years advance written notice or five days' written notice in the event of a default, unless the default is cured within 30 business days.

 

Capacity Supply Agreements

Ameren Illinois, as an electric load-serving entity, must acquire capacity sufficient to meet its obligations to customers.

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary capacity requirements for the period from June 1, 2008, through May 31, 2009. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFPs. Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements for $6 million. In addition, Ameren Missouri contracted to supply a portion of the Ameren Illinois' capacity for $1 million.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2009, through May 31, 2012. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2009, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $4 million, $9 million, and $8 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively. In April 2009, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $2 million, $2 million, and $1 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2010, through May 31, 2013. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2010, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $1 million, $2 million, and $3 million for the 12 months ending May 31, 2011, 2012, and 2013, respectively. In April 2010, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for less than $1 million for the period from June 1, 2010, through May 31, 2013.

Energy Swaps and Energy Products

Ameren Illinois, as an electric load-serving entity, must acquire energy sufficient to meet its obligations to customers.

As part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company (for the benefit of Genco and AERG) to lock in energy prices for 400 to 1,000 megawatts annually of its round-the-clock power requirements during the period June 1, 2008, to December 31, 2012, at then-relevant market prices. These financial contracts do not include capacity, are not load-following products, and do not involve the physical delivery of energy. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives subject to regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities for Ameren Illinois and OCI at Marketing Company. See Note 7 – Derivative Financial Instruments for additional information on these derivatives. Below are the remaining contracted volumes and prices per megawatthour as of December 31, 2011:

 

Period   Volume     Price per
Megawatthour
 

January 1, 2012 – December 31, 2012

    1,000 MW      $ 53.08   

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary financial energy swaps required for the period from June 1, 2008, through May 31, 2009. Marketing Company was a winning supplier in Ameren Illinois' energy swap RFP process. Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for about 2 million megawatthours at approximately $60 per megawatthour.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps from June 1, 2009, through May 31, 2011. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2009, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for approximately 80,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2010, and for approximately 89,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2011.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps for the period from June 1, 2010, through May 31, 2013. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2010, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois will pay for approximately 924,000 megawatthours at approximately $33 per megawatthour during the 12 months ending May 31, 2011, and for approximately 296,000 megawatthours at approximately $40 per megawatthour during the 12 months ending May 31, 2012.

Energy Products

In 2011, Ameren Illinois used a RFP process administered by the IPA to procure energy products that will settle physically from June 1, 2011, through May 31, 2014. Marketing Company and Ameren Missouri were winning suppliers in Ameren Illinois' energy product RFP process. In May 2011, Marketing Company and Ameren Illinois entered into energy product agreements by which Marketing Company will sell and Ameren Illinois will purchase approximately 1,747,200 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 1,840,800 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2013, and approximately 650,000 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2014. In May 2011, Ameren Missouri and Ameren Illinois entered into energy product agreements by which Ameren Missouri will sell and Ameren Illinois will purchase approximately 16,800 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 40,800 megawatthours at approximately $29 per megawatthour during the 12 months ending May 31, 2013, and approximately 40,800 megawatthours at approximately $28 per megawatthour during the 12 months ending May 31, 2014. The 2012 and 2013 energy product agreements between Ameren Missouri and Ameren Illinois are for off-peak hours only.

In February 2012, a rate stability procurement for energy products that will settle physically was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Marketing Company was a winning supplier in Ameren Illinois' energy product procurement process. In February 2012, Marketing Company and Ameren Illinois entered into energy product agreements pursuant to which Marketing Company will sell and Ameren Illinois will purchase approximately 3,942,000 megawatthours at approximately $30 per megawatthour during the 12 months ending May 31, 2014, approximately 3,504,000 megawatthours at approximately $32 per megawatthour during the 12 months ending May 31, 2015, and approximately 1,317,600 megawatthours at approximately $34 per megawatthour during the 12 months ending May 31, 2016. The energy product agreements were based on around-the-clock prices.

Interconnection and Transmission Agreements

Ameren Missouri and Ameren Illinois are parties to an interconnection agreement for the use of their respective transmission lines and other facilities for the distribution of power. These agreements have no contractual expiration date, but may be terminated by either party with three years' notice.

Joint Ownership Agreement

ATXI and Ameren Illinois have a joint ownership agreement to construct, own, operate, and maintain certain electric transmission assets in Illinois. Under the terms of this agreement, Ameren Illinois and ATXI are responsible for their applicable share of all costs related to the construction, operation, and maintenance of electric transmission systems. Ameren is the primary beneficiary of ATXI, and therefore consolidates ATXI. Currently, there are no construction projects or joint ownership of existing assets under this agreement.

 

In January 2011, ATXI repaid advances for the construction of transmission assets to Ameren Illinois in the amount of $52 million, including $3 million of accrued interest.

In March 2011, Ameren Illinois and ATXI signed an agreement to transfer, at cost, all of ATXI's construction work in progress assets related to the construction of a transmission line to Ameren Illinois for $20 million. In April 2011, Ameren Illinois paid ATXI for these assets.

Support Services Agreements

Ameren Services provides support services to its affiliates. The costs of support services, including wages, employee benefits, professional services, and other expenses, are based on, or are an allocation of, actual costs incurred. AFS provided support services to its affiliates through December 31, 2010. Effective January 1, 2011, the services previously performed by AFS are performed within the Ameren Missouri, Ameren Illinois and Merchant Generation business segments. In addition, Ameren Missouri, Ameren Illinois and Genco provide affiliates, primarily Ameren Services, with access to their facilities for administrative purposes. The cost of the rent and facility services are based on, or are an allocation of, actual costs incurred.

Gas Sales and Transportation Agreement

Under a gas transportation agreement, Genco acquires gas transportation service from Ameren Missouri. This agreement expires in February 2016.

Money Pools

See Note 5 – Long-term Debt and Equity Financings for discussion of affiliate borrowing arrangements.

Collateral Postings

Under the terms of the 2011, 2010, and 2009 Illinois power procurement agreements entered into through a RFP process administered by the IPA, suppliers must post collateral under certain market conditions to protect Ameren Illinois in the event of nonperformance. The collateral postings are unilateral, meaning that only the suppliers would be required to post collateral. Therefore, Ameren Missouri, as a winning supplier of capacity and energy products, and Marketing Company, as a winning supplier of capacity, financial energy swaps, and energy products, may be required to post collateral. As of December 31, 2011, and 2010, there were no collateral postings required of Ameren Missouri or Marketing Company related to the 2011, 2010, and 2009 Illinois power procurement agreements.

Intercompany Transfers

On October 1, 2010, Ameren Illinois distributed AERG's common stock to Ameren in connection with the Ameren Illinois Merger. Ameren subsequently contributed the AERG common stock to AER. The distribution of AERG

common stock was accounted for as a transaction between entities under common control; therefore, Ameren Illinois transferred AERG to Ameren based on AERG's carrying

value. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

The following table presents the impact on Ameren Missouri, Ameren Illinois and Genco, of related party transactions for the years ended December 31, 2011, 2010, and 2009. It is based primarily on the agreements discussed above and the money pool arrangements discussed in Note 4 – Short-Term Debt and Liquidity.

 

Agreement    Income Statement Line Item                                Ameren
Missouri
    Ameren
Illinois
    Genco  

Genco and EEI power supply

   Operating Revenues      2011       $ (a   $ (a   $   1,006   

agreements with Marketing Company

        2010         (a     (a     1,059   
            2009         (a     (a     1,071   

Ameren Missouri power supply agreements

   Operating Revenues      2011         2        (a     (a

with Ameren Illinois

        2010         2        (a     (a
            2009         3        (a     (a

Ameren Missouri and Genco gas

   Operating Revenues      2011         1        (a     (a

transportation agreement

        2010         1        (a     (a
            2009         1        (a     (a

Genco gas sales to Medina Valley

   Operating Revenues      2011         (a     (a     3   
        2010         (a     (a     2   
            2009         (a     (a     1   

Genco gas sales to distribution companies

   Operating Revenues      2011         (a     (a     -   
        2010         (a     (a     1   
            2009         (a     (a     2   

Ameren Missouri, Ameren Illinois

   Operating Revenues      2011               16        1        -   

and Genco rent and facility services

        2010         16        1        1   
            2009         18        1        1   

Total Operating Revenues

        2011       $       19      $ 1      $ 1,009   
        2010         19        1        1,063   
            2009         22        1        1,075   

Ameren Missouri and Genco gas

   Fuel      2011       $ (a   $ (a   $ 1   

transportation agreement

        2010         (a     (a     1   
            2009         (a     (a     1   

Ameren Illinois power supply agreements

   Purchased Power      2011       $ (a   $     232      $ (a

with Marketing Company

        2010         (a     233        (a
            2009         (a     400        (a

Ameren Illinois power supply

   Purchased Power      2011         (a     2        (a

agreements with Ameren Missouri

        2010         (a     2        (a
            2009         (a     3        (a

Ameren Illinois ancillary services agreement

   Purchased Power      2011         (a     -        (a

with Marketing Company

        2010         (a     -        (a
            2009         (a     (b     (a

EEI power supply agreement with

   Purchased Power      2011         (a     (a     36   

Marketing Company

        2010         (a     (a     11   
            2009         (a     (a     42   

Total Purchased Power

        2011       $ (a   $ 234      $ 37   
        2010         (a     235        12   
            2009         (a     403        43   

Gas purchases from Genco

   Gas Purchased for Resale      2011       $ (a   $ -      $ (a
        2010         (a     1        (a
            2009         (a     2        (a

Ameren Services support services

   Other Operations and      2011       $ 114      $ 90      $ 19   

agreement

  

Maintenance

     2010         128        102        23   
            2009         131        101        27   

AFS support services agreement

   Other Operations and      2011         (a     (a     (a
  

Maintenance

     2010         7        (b     3   
            2009         7        6        3   

Insurance premiums(c)

   Other Operations and      2011         (b     (a     -   
  

Maintenance

     2010         1        (a     -   
            2009         2        (a     1   

Total Other Operations and

        2011       $   114      $ 90      $    19   

Maintenance Expenses

        2010         136          102        26   
            2009         140        107        31   

Money pool borrowings (advances)

   Interest (Charges)      2011       $ -      $ -      $ (b
  

Income

     2010         -        (b     (b
            2009         -        (b     (1

 

(a) Not applicable.
(b) Amount less than $1 million.
(c) Represents insurance premiums paid to Energy Risk Assurance Company, an affiliate for replacement power, property damage, and terrorism coverage.

NOTE 14 – RELATED PARTY TRANSACTIONS

The Ameren Companies have engaged in, and may in the future engage in, affiliate transactions in the normal course of business. These transactions primarily consist of natural gas and power purchases and sales, services received or rendered, and borrowings and lendings. Transactions between affiliates are reported as intercompany transactions on their financial statements, but are eliminated in consolidation for Ameren's financial statements. Below are the material related party agreements.

Electric Power Supply Agreements

Genco Power Supply Agreements

The following table presents the amount of physical gigawatthour sales under Genco's related party electric power supply agreements with Marketing Company, including EEI's power supply agreement with Marketing Company, for the years ended December 31, 2011, 2010, and 2009:

 

     December 31,  
     2011     2010     2009  

Genco sales to Marketing Company

    21,040        21,656        19,598   

 

Genco entered into a power supply agreement, as amended (PSA), with Marketing Company, whereby Genco agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from Genco's generation fleet. Marketing Company entered into a similar PSA with AERG. Under the PSAs, revenues allocated between Genco and AERG are based on reimbursable expenses and generation. Each PSA will continue through December 31, 2022, and from year to year thereafter unless either party to the respective PSA elects to terminate the PSA by providing the other party with no less than six months advance written notice.

In December 2005, EEI entered into a PSA with Marketing Company, whereby EEI agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from EEI's generation fleet. The price that Marketing Company pays for capacity is set annually based upon prevailing market prices. Marketing Company pays spot market prices for the associated energy. In addition, EEI will at times purchase energy from Marketing Company to fulfill obligations to a nonaffiliated party. This PSA will continue through May 31, 2016, unless either party elects to terminate the PSA by providing the other party with no less than four years advance written notice or five days' written notice in the event of a default, unless the default is cured within 30 business days.

 

Capacity Supply Agreements

Ameren Illinois, as an electric load-serving entity, must acquire capacity sufficient to meet its obligations to customers.

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary capacity requirements for the period from June 1, 2008, through May 31, 2009. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFPs. Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements for $6 million. In addition, Ameren Missouri contracted to supply a portion of the Ameren Illinois' capacity for $1 million.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2009, through May 31, 2012. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2009, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $4 million, $9 million, and $8 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively. In April 2009, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $2 million, $2 million, and $1 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2010, through May 31, 2013. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2010, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $1 million, $2 million, and $3 million for the 12 months ending May 31, 2011, 2012, and 2013, respectively. In April 2010, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for less than $1 million for the period from June 1, 2010, through May 31, 2013.

Energy Swaps and Energy Products

Ameren Illinois, as an electric load-serving entity, must acquire energy sufficient to meet its obligations to customers.

As part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company (for the benefit of Genco and AERG) to lock in energy prices for 400 to 1,000 megawatts annually of its round-the-clock power requirements during the period June 1, 2008, to December 31, 2012, at then-relevant market prices. These financial contracts do not include capacity, are not load-following products, and do not involve the physical delivery of energy. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives subject to regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities for Ameren Illinois and OCI at Marketing Company. See Note 7 – Derivative Financial Instruments for additional information on these derivatives. Below are the remaining contracted volumes and prices per megawatthour as of December 31, 2011:

 

Period   Volume     Price per
Megawatthour
 

January 1, 2012 – December 31, 2012

    1,000 MW      $ 53.08   

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary financial energy swaps required for the period from June 1, 2008, through May 31, 2009. Marketing Company was a winning supplier in Ameren Illinois' energy swap RFP process. Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for about 2 million megawatthours at approximately $60 per megawatthour.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps from June 1, 2009, through May 31, 2011. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2009, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for approximately 80,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2010, and for approximately 89,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2011.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps for the period from June 1, 2010, through May 31, 2013. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2010, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois will pay for approximately 924,000 megawatthours at approximately $33 per megawatthour during the 12 months ending May 31, 2011, and for approximately 296,000 megawatthours at approximately $40 per megawatthour during the 12 months ending May 31, 2012.

Energy Products

In 2011, Ameren Illinois used a RFP process administered by the IPA to procure energy products that will settle physically from June 1, 2011, through May 31, 2014. Marketing Company and Ameren Missouri were winning suppliers in Ameren Illinois' energy product RFP process. In May 2011, Marketing Company and Ameren Illinois entered into energy product agreements by which Marketing Company will sell and Ameren Illinois will purchase approximately 1,747,200 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 1,840,800 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2013, and approximately 650,000 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2014. In May 2011, Ameren Missouri and Ameren Illinois entered into energy product agreements by which Ameren Missouri will sell and Ameren Illinois will purchase approximately 16,800 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 40,800 megawatthours at approximately $29 per megawatthour during the 12 months ending May 31, 2013, and approximately 40,800 megawatthours at approximately $28 per megawatthour during the 12 months ending May 31, 2014. The 2012 and 2013 energy product agreements between Ameren Missouri and Ameren Illinois are for off-peak hours only.

In February 2012, a rate stability procurement for energy products that will settle physically was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Marketing Company was a winning supplier in Ameren Illinois' energy product procurement process. In February 2012, Marketing Company and Ameren Illinois entered into energy product agreements pursuant to which Marketing Company will sell and Ameren Illinois will purchase approximately 3,942,000 megawatthours at approximately $30 per megawatthour during the 12 months ending May 31, 2014, approximately 3,504,000 megawatthours at approximately $32 per megawatthour during the 12 months ending May 31, 2015, and approximately 1,317,600 megawatthours at approximately $34 per megawatthour during the 12 months ending May 31, 2016. The energy product agreements were based on around-the-clock prices.

Interconnection and Transmission Agreements

Ameren Missouri and Ameren Illinois are parties to an interconnection agreement for the use of their respective transmission lines and other facilities for the distribution of power. These agreements have no contractual expiration date, but may be terminated by either party with three years' notice.

Joint Ownership Agreement

ATXI and Ameren Illinois have a joint ownership agreement to construct, own, operate, and maintain certain electric transmission assets in Illinois. Under the terms of this agreement, Ameren Illinois and ATXI are responsible for their applicable share of all costs related to the construction, operation, and maintenance of electric transmission systems. Ameren is the primary beneficiary of ATXI, and therefore consolidates ATXI. Currently, there are no construction projects or joint ownership of existing assets under this agreement.

 

In January 2011, ATXI repaid advances for the construction of transmission assets to Ameren Illinois in the amount of $52 million, including $3 million of accrued interest.

In March 2011, Ameren Illinois and ATXI signed an agreement to transfer, at cost, all of ATXI's construction work in progress assets related to the construction of a transmission line to Ameren Illinois for $20 million. In April 2011, Ameren Illinois paid ATXI for these assets.

Support Services Agreements

Ameren Services provides support services to its affiliates. The costs of support services, including wages, employee benefits, professional services, and other expenses, are based on, or are an allocation of, actual costs incurred. AFS provided support services to its affiliates through December 31, 2010. Effective January 1, 2011, the services previously performed by AFS are performed within the Ameren Missouri, Ameren Illinois and Merchant Generation business segments. In addition, Ameren Missouri, Ameren Illinois and Genco provide affiliates, primarily Ameren Services, with access to their facilities for administrative purposes. The cost of the rent and facility services are based on, or are an allocation of, actual costs incurred.

Gas Sales and Transportation Agreement

Under a gas transportation agreement, Genco acquires gas transportation service from Ameren Missouri. This agreement expires in February 2016.

Money Pools

See Note 5 – Long-term Debt and Equity Financings for discussion of affiliate borrowing arrangements.

Collateral Postings

Under the terms of the 2011, 2010, and 2009 Illinois power procurement agreements entered into through a RFP process administered by the IPA, suppliers must post collateral under certain market conditions to protect Ameren Illinois in the event of nonperformance. The collateral postings are unilateral, meaning that only the suppliers would be required to post collateral. Therefore, Ameren Missouri, as a winning supplier of capacity and energy products, and Marketing Company, as a winning supplier of capacity, financial energy swaps, and energy products, may be required to post collateral. As of December 31, 2011, and 2010, there were no collateral postings required of Ameren Missouri or Marketing Company related to the 2011, 2010, and 2009 Illinois power procurement agreements.

Intercompany Transfers

On October 1, 2010, Ameren Illinois distributed AERG's common stock to Ameren in connection with the Ameren Illinois Merger. Ameren subsequently contributed the AERG common stock to AER. The distribution of AERG

common stock was accounted for as a transaction between entities under common control; therefore, Ameren Illinois transferred AERG to Ameren based on AERG's carrying

value. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

The following table presents the impact on Ameren Missouri, Ameren Illinois and Genco, of related party transactions for the years ended December 31, 2011, 2010, and 2009. It is based primarily on the agreements discussed above and the money pool arrangements discussed in Note 4 – Short-Term Debt and Liquidity.

 

Agreement    Income Statement Line Item                                Ameren
Missouri
    Ameren
Illinois
    Genco  

Genco and EEI power supply

   Operating Revenues      2011       $ (a   $ (a   $   1,006   

agreements with Marketing Company

        2010         (a     (a     1,059   
            2009         (a     (a     1,071   

Ameren Missouri power supply agreements

   Operating Revenues      2011         2        (a     (a

with Ameren Illinois

        2010         2        (a     (a
            2009         3        (a     (a

Ameren Missouri and Genco gas

   Operating Revenues      2011         1        (a     (a

transportation agreement

        2010         1        (a     (a
            2009         1        (a     (a

Genco gas sales to Medina Valley

   Operating Revenues      2011         (a     (a     3   
        2010         (a     (a     2   
            2009         (a     (a     1   

Genco gas sales to distribution companies

   Operating Revenues      2011         (a     (a     -   
        2010         (a     (a     1   
            2009         (a     (a     2   

Ameren Missouri, Ameren Illinois

   Operating Revenues      2011               16        1        -   

and Genco rent and facility services

        2010         16        1        1   
            2009         18        1        1   

Total Operating Revenues

        2011       $       19      $ 1      $ 1,009   
        2010         19        1        1,063   
            2009         22        1        1,075   

Ameren Missouri and Genco gas

   Fuel      2011       $ (a   $ (a   $ 1   

transportation agreement

        2010         (a     (a     1   
            2009         (a     (a     1   

Ameren Illinois power supply agreements

   Purchased Power      2011       $ (a   $     232      $ (a

with Marketing Company

        2010         (a     233        (a
            2009         (a     400        (a

Ameren Illinois power supply

   Purchased Power      2011         (a     2        (a

agreements with Ameren Missouri

        2010         (a     2        (a
            2009         (a     3        (a

Ameren Illinois ancillary services agreement

   Purchased Power      2011         (a     -        (a

with Marketing Company

        2010         (a     -        (a
            2009         (a     (b     (a

EEI power supply agreement with

   Purchased Power      2011         (a     (a     36   

Marketing Company

        2010         (a     (a     11   
            2009         (a     (a     42   

Total Purchased Power

        2011       $ (a   $ 234      $ 37   
        2010         (a     235        12   
            2009         (a     403        43   

Gas purchases from Genco

   Gas Purchased for Resale      2011       $ (a   $ -      $ (a
        2010         (a     1        (a
            2009         (a     2        (a

Ameren Services support services

   Other Operations and      2011       $ 114      $ 90      $ 19   

agreement

  

Maintenance

     2010         128        102        23   
            2009         131        101        27   

AFS support services agreement

   Other Operations and      2011         (a     (a     (a
  

Maintenance

     2010         7        (b     3   
            2009         7        6        3   

Insurance premiums(c)

   Other Operations and      2011         (b     (a     -   
  

Maintenance

     2010         1        (a     -   
            2009         2        (a     1   

Total Other Operations and

        2011       $   114      $ 90      $    19   

Maintenance Expenses

        2010         136          102        26   
            2009         140        107        31   

Money pool borrowings (advances)

   Interest (Charges)      2011       $ -      $ -      $ (b
  

Income

     2010         -        (b     (b
            2009         -        (b     (1

 

(a) Not applicable.
(b) Amount less than $1 million.
(c) Represents insurance premiums paid to Energy Risk Assurance Company, an affiliate for replacement power, property damage, and terrorism coverage.

NOTE 14 – RELATED PARTY TRANSACTIONS

The Ameren Companies have engaged in, and may in the future engage in, affiliate transactions in the normal course of business. These transactions primarily consist of natural gas and power purchases and sales, services received or rendered, and borrowings and lendings. Transactions between affiliates are reported as intercompany transactions on their financial statements, but are eliminated in consolidation for Ameren's financial statements. Below are the material related party agreements.

Electric Power Supply Agreements

Genco Power Supply Agreements

The following table presents the amount of physical gigawatthour sales under Genco's related party electric power supply agreements with Marketing Company, including EEI's power supply agreement with Marketing Company, for the years ended December 31, 2011, 2010, and 2009:

 

     December 31,  
     2011     2010     2009  

Genco sales to Marketing Company

    21,040        21,656        19,598   

 

Genco entered into a power supply agreement, as amended (PSA), with Marketing Company, whereby Genco agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from Genco's generation fleet. Marketing Company entered into a similar PSA with AERG. Under the PSAs, revenues allocated between Genco and AERG are based on reimbursable expenses and generation. Each PSA will continue through December 31, 2022, and from year to year thereafter unless either party to the respective PSA elects to terminate the PSA by providing the other party with no less than six months advance written notice.

In December 2005, EEI entered into a PSA with Marketing Company, whereby EEI agreed to sell and Marketing Company agreed to purchase all of the capacity and energy available from EEI's generation fleet. The price that Marketing Company pays for capacity is set annually based upon prevailing market prices. Marketing Company pays spot market prices for the associated energy. In addition, EEI will at times purchase energy from Marketing Company to fulfill obligations to a nonaffiliated party. This PSA will continue through May 31, 2016, unless either party elects to terminate the PSA by providing the other party with no less than four years advance written notice or five days' written notice in the event of a default, unless the default is cured within 30 business days.

 

Capacity Supply Agreements

Ameren Illinois, as an electric load-serving entity, must acquire capacity sufficient to meet its obligations to customers.

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary capacity requirements for the period from June 1, 2008, through May 31, 2009. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFPs. Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements for $6 million. In addition, Ameren Missouri contracted to supply a portion of the Ameren Illinois' capacity for $1 million.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2009, through May 31, 2012. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2009, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $4 million, $9 million, and $8 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively. In April 2009, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $2 million, $2 million, and $1 million for the 12 months ending May 31, 2010, 2011, and 2012, respectively.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to contract capacity for the period from June 1, 2010, through May 31, 2013. Both Marketing Company and Ameren Missouri were among the winning suppliers in the capacity RFP process. In April 2010, Marketing Company contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for $1 million, $2 million, and $3 million for the 12 months ending May 31, 2011, 2012, and 2013, respectively. In April 2010, Ameren Missouri contracted to supply a portion of Ameren Illinois' capacity requirements to Ameren Illinois for less than $1 million for the period from June 1, 2010, through May 31, 2013.

Energy Swaps and Energy Products

Ameren Illinois, as an electric load-serving entity, must acquire energy sufficient to meet its obligations to customers.

As part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company (for the benefit of Genco and AERG) to lock in energy prices for 400 to 1,000 megawatts annually of its round-the-clock power requirements during the period June 1, 2008, to December 31, 2012, at then-relevant market prices. These financial contracts do not include capacity, are not load-following products, and do not involve the physical delivery of energy. These financial contracts are derivative instruments. They are accounted for as cash flow hedges by Marketing Company and as derivatives subject to regulatory deferral by Ameren Illinois. Consequently, Ameren Illinois and Marketing Company record the fair value of the contracts on their respective balance sheets and the changes to the fair value in regulatory assets or liabilities for Ameren Illinois and OCI at Marketing Company. See Note 7 – Derivative Financial Instruments for additional information on these derivatives. Below are the remaining contracted volumes and prices per megawatthour as of December 31, 2011:

 

Period   Volume     Price per
Megawatthour
 

January 1, 2012 – December 31, 2012

    1,000 MW      $ 53.08   

Ameren Illinois used RFP processes in early 2008, pursuant to the 2007 Illinois Electric Settlement Agreement, to contract for the necessary financial energy swaps required for the period from June 1, 2008, through May 31, 2009. Marketing Company was a winning supplier in Ameren Illinois' energy swap RFP process. Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for about 2 million megawatthours at approximately $60 per megawatthour.

In 2009, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps from June 1, 2009, through May 31, 2011. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2009, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois paid for approximately 80,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2010, and for approximately 89,000 megawatthours at approximately $48 per megawatthour during the 12 months ending May 31, 2011.

In 2010, Ameren Illinois used a RFP process, administered by the IPA, to procure financial energy swaps for the period from June 1, 2010, through May 31, 2013. Marketing Company was a winning supplier in the financial energy swap RFP process. In May 2010, Marketing Company entered into financial instruments that fixed the price that Ameren Illinois will pay for approximately 924,000 megawatthours at approximately $33 per megawatthour during the 12 months ending May 31, 2011, and for approximately 296,000 megawatthours at approximately $40 per megawatthour during the 12 months ending May 31, 2012.

Energy Products

In 2011, Ameren Illinois used a RFP process administered by the IPA to procure energy products that will settle physically from June 1, 2011, through May 31, 2014. Marketing Company and Ameren Missouri were winning suppliers in Ameren Illinois' energy product RFP process. In May 2011, Marketing Company and Ameren Illinois entered into energy product agreements by which Marketing Company will sell and Ameren Illinois will purchase approximately 1,747,200 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 1,840,800 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2013, and approximately 650,000 megawatthours at approximately $42 per megawatthour during the 12 months ending May 31, 2014. In May 2011, Ameren Missouri and Ameren Illinois entered into energy product agreements by which Ameren Missouri will sell and Ameren Illinois will purchase approximately 16,800 megawatthours at approximately $37 per megawatthour during the 12 months ending May 31, 2012, approximately 40,800 megawatthours at approximately $29 per megawatthour during the 12 months ending May 31, 2013, and approximately 40,800 megawatthours at approximately $28 per megawatthour during the 12 months ending May 31, 2014. The 2012 and 2013 energy product agreements between Ameren Missouri and Ameren Illinois are for off-peak hours only.

In February 2012, a rate stability procurement for energy products that will settle physically was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Marketing Company was a winning supplier in Ameren Illinois' energy product procurement process. In February 2012, Marketing Company and Ameren Illinois entered into energy product agreements pursuant to which Marketing Company will sell and Ameren Illinois will purchase approximately 3,942,000 megawatthours at approximately $30 per megawatthour during the 12 months ending May 31, 2014, approximately 3,504,000 megawatthours at approximately $32 per megawatthour during the 12 months ending May 31, 2015, and approximately 1,317,600 megawatthours at approximately $34 per megawatthour during the 12 months ending May 31, 2016. The energy product agreements were based on around-the-clock prices.

Interconnection and Transmission Agreements

Ameren Missouri and Ameren Illinois are parties to an interconnection agreement for the use of their respective transmission lines and other facilities for the distribution of power. These agreements have no contractual expiration date, but may be terminated by either party with three years' notice.

Joint Ownership Agreement

ATXI and Ameren Illinois have a joint ownership agreement to construct, own, operate, and maintain certain electric transmission assets in Illinois. Under the terms of this agreement, Ameren Illinois and ATXI are responsible for their applicable share of all costs related to the construction, operation, and maintenance of electric transmission systems. Ameren is the primary beneficiary of ATXI, and therefore consolidates ATXI. Currently, there are no construction projects or joint ownership of existing assets under this agreement.

 

In January 2011, ATXI repaid advances for the construction of transmission assets to Ameren Illinois in the amount of $52 million, including $3 million of accrued interest.

In March 2011, Ameren Illinois and ATXI signed an agreement to transfer, at cost, all of ATXI's construction work in progress assets related to the construction of a transmission line to Ameren Illinois for $20 million. In April 2011, Ameren Illinois paid ATXI for these assets.

Support Services Agreements

Ameren Services provides support services to its affiliates. The costs of support services, including wages, employee benefits, professional services, and other expenses, are based on, or are an allocation of, actual costs incurred. AFS provided support services to its affiliates through December 31, 2010. Effective January 1, 2011, the services previously performed by AFS are performed within the Ameren Missouri, Ameren Illinois and Merchant Generation business segments. In addition, Ameren Missouri, Ameren Illinois and Genco provide affiliates, primarily Ameren Services, with access to their facilities for administrative purposes. The cost of the rent and facility services are based on, or are an allocation of, actual costs incurred.

Gas Sales and Transportation Agreement

Under a gas transportation agreement, Genco acquires gas transportation service from Ameren Missouri. This agreement expires in February 2016.

Money Pools

See Note 5 – Long-term Debt and Equity Financings for discussion of affiliate borrowing arrangements.

Collateral Postings

Under the terms of the 2011, 2010, and 2009 Illinois power procurement agreements entered into through a RFP process administered by the IPA, suppliers must post collateral under certain market conditions to protect Ameren Illinois in the event of nonperformance. The collateral postings are unilateral, meaning that only the suppliers would be required to post collateral. Therefore, Ameren Missouri, as a winning supplier of capacity and energy products, and Marketing Company, as a winning supplier of capacity, financial energy swaps, and energy products, may be required to post collateral. As of December 31, 2011, and 2010, there were no collateral postings required of Ameren Missouri or Marketing Company related to the 2011, 2010, and 2009 Illinois power procurement agreements.

Intercompany Transfers

On October 1, 2010, Ameren Illinois distributed AERG's common stock to Ameren in connection with the Ameren Illinois Merger. Ameren subsequently contributed the AERG common stock to AER. The distribution of AERG

common stock was accounted for as a transaction between entities under common control; therefore, Ameren Illinois transferred AERG to Ameren based on AERG's carrying

value. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

 

The following table presents the impact on Ameren Missouri, Ameren Illinois and Genco, of related party transactions for the years ended December 31, 2011, 2010, and 2009. It is based primarily on the agreements discussed above and the money pool arrangements discussed in Note 4 – Short-Term Debt and Liquidity.

 

Agreement    Income Statement Line Item                                Ameren
Missouri
    Ameren
Illinois
    Genco  

Genco and EEI power supply

   Operating Revenues      2011       $ (a   $ (a   $   1,006   

agreements with Marketing Company

        2010         (a     (a     1,059   
            2009         (a     (a     1,071   

Ameren Missouri power supply agreements

   Operating Revenues      2011         2        (a     (a

with Ameren Illinois

        2010         2        (a     (a
            2009         3        (a     (a

Ameren Missouri and Genco gas

   Operating Revenues      2011         1        (a     (a

transportation agreement

        2010         1        (a     (a
            2009         1        (a     (a

Genco gas sales to Medina Valley

   Operating Revenues      2011         (a     (a     3   
        2010         (a     (a     2   
            2009         (a     (a     1   

Genco gas sales to distribution companies

   Operating Revenues      2011         (a     (a     -   
        2010         (a     (a     1   
            2009         (a     (a     2   

Ameren Missouri, Ameren Illinois

   Operating Revenues      2011               16        1        -   

and Genco rent and facility services

        2010         16        1        1   
            2009         18        1        1   

Total Operating Revenues

        2011       $       19      $ 1      $ 1,009   
        2010         19        1        1,063   
            2009         22        1        1,075   

Ameren Missouri and Genco gas

   Fuel      2011       $ (a   $ (a   $ 1   

transportation agreement

        2010         (a     (a     1   
            2009         (a     (a     1   

Ameren Illinois power supply agreements

   Purchased Power      2011       $ (a   $     232      $ (a

with Marketing Company

        2010         (a     233        (a
            2009         (a     400        (a

Ameren Illinois power supply

   Purchased Power      2011         (a     2        (a

agreements with Ameren Missouri

        2010         (a     2        (a
            2009         (a     3        (a

Ameren Illinois ancillary services agreement

   Purchased Power      2011         (a     -        (a

with Marketing Company

        2010         (a     -        (a
            2009         (a     (b     (a

EEI power supply agreement with

   Purchased Power      2011         (a     (a     36   

Marketing Company

        2010         (a     (a     11   
            2009         (a     (a     42   

Total Purchased Power

        2011       $ (a   $ 234      $ 37   
        2010         (a     235        12   
            2009         (a     403        43   

Gas purchases from Genco

   Gas Purchased for Resale      2011       $ (a   $ -      $ (a
        2010         (a     1        (a
            2009         (a     2        (a

Ameren Services support services

   Other Operations and      2011       $ 114      $ 90      $ 19   

agreement

  

Maintenance

     2010         128        102        23   
            2009         131        101        27   

AFS support services agreement

   Other Operations and      2011         (a     (a     (a
  

Maintenance

     2010         7        (b     3   
            2009         7        6        3   

Insurance premiums(c)

   Other Operations and      2011         (b     (a     -   
  

Maintenance

     2010         1        (a     -   
            2009         2        (a     1   

Total Other Operations and

        2011       $   114      $ 90      $    19   

Maintenance Expenses

        2010         136          102        26   
            2009         140        107        31   

Money pool borrowings (advances)

   Interest (Charges)      2011       $ -      $ -      $ (b
  

Income

     2010         -        (b     (b
            2009         -        (b     (1

 

(a) Not applicable.
(b) Amount less than $1 million.
(c) Represents insurance premiums paid to Energy Risk Assurance Company, an affiliate for replacement power, property damage, and terrorism coverage.
Commitments And Contingencies

NOTE 15 – COMMITMENTS AND CONTINGENCIES

We are involved in legal, tax and regulatory proceedings before various courts, regulatory commissions, and governmental agencies with respect to matters that arise in the ordinary course of business, some of which involve substantial amounts of money. We believe that the final disposition of these proceedings, except as otherwise disclosed in these notes to our financial statements, will not have a material adverse effect on our results of operations, financial position, or liquidity.

See also Note 1 – Summary of Significant Accounting Policies, Note 2 – Rate and Regulatory Matters, Note 10 – Callaway Energy Center and Note 14 – Related Party Transactions in this report.

Callaway Energy Center

The following table presents insurance coverage at Ameren Missouri's Callaway energy center at December 31, 2011. The property coverage and the nuclear liability coverage must be renewed on April 1 and January 1, respectively, of each year.

 

The Price-Anderson Act is a federal law that limits the liability for claims from an incident involving any licensed United States commercial nuclear power facility. The limit is based on the number of licensed reactors. The limit of liability and the maximum potential annual payments are adjusted at least every five years for inflation to reflect changes in the Consumer Price Index. The five-year inflationary adjustment as prescribed by the most recent Price-Anderson Act renewal was effective October 29, 2008. Owners of a nuclear reactor cover this exposure through a combination of private insurance and mandatory participation in a financial protection pool, as established by Price-Anderson.

Losses resulting from terrorist attacks are covered under Nuclear Electric Insurance Ltd.'s policies, subject to an industrywide aggregate policy limit of $3.24 billion within a 12-month period for coverage for such terrorist acts.

If losses from a nuclear incident at the Callaway energy center exceed the limits of, or are not covered by, insurance, or if coverage is unavailable, Ameren Missouri is at risk for any uninsured losses. If a serious nuclear incident were to occur, it could have a material adverse effect on Ameren's and Ameren Missouri's results of operations, financial position, or liquidity.

Leases

We lease various facilities, office equipment, plant equipment, and rail cars under operating leases. The following table presents our lease obligations at December 31, 2011:

 

The following table presents total rental expense, included in operating expenses, for the years ended December 31, 2011, 2010 and 2009:

 

 

Other Obligations

To supply a portion of the fuel requirements of our generating plants, we have entered into various long-term commitments for the procurement of coal, natural gas, nuclear fuel, and methane gas. We also have entered into various long-term commitments for purchased power and natural gas for distribution. The table below presents our estimated fuel, purchased power, and other commitments at December 31, 2011. Ameren's and Ameren Missouri's coal commitments include multiyear agreements to procure ultra-low-sulfur coal and related transportation from the Powder River Basin in Wyoming. Ameren's and Ameren Missouri's purchased power obligations include a 102-MW power purchase agreement with a wind farm operator that expires in 2024. Ameren's and Ameren Illinois' purchased power obligations include the Ameren Illinois power purchase agreements entered into as part of the IPA-administered power procurement process. Included in the Other column are minimum purchase commitments under contracts for equipment, design and construction, meter reading services, and an Ameren tax credit obligation at December 31, 2011. Ameren's tax credit obligation is a $17 million note payable issued for an investment in a commercial real estate development partnership to acquire tax credits. This note payable was netted against the related investment in "Other assets" on Ameren's balance sheet at December 31, 2011, as Ameren has a legally enforceable right to offset under authoritative accounting guidance.

 

Also, as part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company to lock in energy prices for 400 to 1,000 megawatts annually of their round-the-clock power requirements from 2008 to 2012. These commitments are not reflected in the above table. See Note 7 – Derivative Financial Instruments and Note 14 – Related Party Transactions for additional information.

In February 2012, a rate stability procurement for energy products and renewable energy credits was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Ameren Illinois contracted to purchase approximately 13 million megawatthours of energy products at an average price of approximately $31 per megawatthour. Ameren Illinois is currently reviewing the results of the renewable energy credits procurement proceeding.

Ameren Illinois has entered into an agreement to purchase approximately 15.5 billion cubic feet of synthetic natural gas annually over a 10-year period beginning in 2016 for its natural gas customers. The agreement is contingent on the counterparty reaching certain milestones during the project development and the construction of the plant that will produce the synthetic natural gas. Construction has not begun on the plant; therefore, Ameren Illinois' obligations are not yet certain at this time. The agreement was entered into pursuant to an Illinois law which became effective August 2, 2011, and provides that all contract costs for synthetic natural gas incurred by Ameren Illinois are reasonable and prudent and recoverable through the PGA and are not subject to review or disallowance by the ICC.

Environmental Matters

We are subject to various environmental laws and regulations enforced by federal, state, and local authorities. From the beginning phases of siting and development to the ongoing operation of existing or new electric generating, transmission and distribution facilities, natural gas storage, transmission and distribution facilities, our activities involve compliance with diverse environmental laws and regulations. These laws and regulations address emissions, impacts to air, land and water, noise, protected natural and cultural resources (such as wetlands, endangered species and other protected wildlife, and archeological and historical resources), and chemical and waste handling. Complex and lengthy processes are required to obtain approvals, permits, or licenses for new, existing or modified facilities. Additionally, the use and handling of various chemicals or hazardous materials (including wastes) requires release prevention plans and emergency response procedures.

In addition to existing laws and regulations, including the Illinois MPS that applies to our energy centers in Illinois, the EPA is developing numerous new environmental regulations that will have a significant impact on the electric utility industry. These regulations could be particularly burdensome for certain companies, including Ameren, Ameren Missouri and Genco, that operate coal-fired energy centers. Significant new rules proposed or promulgated since the beginning of 2010 include the regulation of greenhouse gas emissions; revised national ambient air quality standards for SO2 and NO2 emissions; the CSAPR, which requires further reductions of SO2 and NOx emissions from power plants; a regulation governing management of CCR and coal ash impoundments; the MATS, which requires reduction of emissions of mercury, toxic metals, and acid gases from power plants; revised NSPS for particulate matter, SO2, and NOx emissions from new sources; and new regulations under the Clean Water Act that could require significant capital expenditures such as new water intake structures or cooling towers at our energy centers. The EPA also plans to propose an additional rule, applicable to new and existing electric generating units, governing NSPS and emission guidelines for greenhouse gas emissions. These new regulations may be litigated, so the timing of their implementation is uncertain, as evidenced by the stay of the CSAPR by the United States Court of Appeals for the District of Columbia on December 30, 2011. Although many details of these future regulations are unknown, the combined effects of the new and proposed environmental regulations may result in significant capital expenditures and/or increased operating costs over the next five to ten years for Ameren, Ameren Missouri and Genco. Actions required to ensure that our facilities and operations are in compliance with environmental laws and regulations could be prohibitively expensive. If they are, these regulations could require us to close or to significantly alter the operation of our energy centers, which could have an adverse effect on our results of operations, financial position, and liquidity, including the impairment of plant assets. Failure to comply with environmental laws and regulations might also result in the imposition of fines, penalties, and injunctive measures.

The estimates in the table below contain all of the known capital costs to comply with existing environmental regulations and our assessment of the potential impacts of the EPA's proposed regulation for CCR, the recently finalized MATS, the stayed CSAPR as currently designed, and the revised national ambient air quality standards for SO2 and NOx emissions as of December 31, 2011. The estimates in the table below assume that CCR will continue to be regarded as nonhazardous. The estimates in the table below do not include the impacts of new regulations proposed by the EPA under the Clean Water Act in March 2011 regarding cooling water intake structures as our evaluation of those impacts is ongoing. The estimates shown in the table below could change significantly depending upon a variety of factors including:

 

Ÿ  

additional federal or state requirements;

Ÿ  

regulation of greenhouse gas emissions;

Ÿ  

new national ambient air quality standards or changes to existing standards for ozone, fine particulates, SO2, and NOx emissions;

Ÿ  

additional rules governing air pollutant transport;

Ÿ  

finalized regulations under the Clean Water Act;

Ÿ  

CCR being classified as hazardous;

Ÿ  

whether the CSAPR is implemented and whether any modifications are made to its existing requirements;

Ÿ  

new technology;

Ÿ  

expected power prices;

Ÿ  

variations in costs of material or labor; and

Ÿ  

alternative compliance strategies or investment decisions.

 

 

The decision to make pollution control equipment investments at our Merchant Generation business depends on whether the expected future market price for power reflects the increased cost for environmental compliance. In early 2012, there has been a decline in the market price for wholesale power because of factors such as declining natural gas prices and the stay of the CSAPR. As a result of this decline in the market price for power, as well as uncertain environmental regulations, Genco is decelerating the construction of two scrubbers at of its Newton energy center. These scrubbers were originally expected to be installed in late 2013 and spring 2014. The ultimate installation of these scrubbers, now estimated to occur between 2017 and 2021 in the table above, has been postponed until such time as the incremental investment necessary for completion is justified by visible market conditions. However, Genco will continue to incur capital costs related to the construction of these scrubbers. The table above includes Genco's estimated costs of approximately $150 million in 2012 and approximately $20 million annually, excluding capitalized interest, from 2013 through 2016 for the construction of the two scrubbers. In addition to Genco's reduction in estimated capital expenditures, AERG is deferring precipitator upgrades at its E.D. Edwards energy center beyond 2016.

The following sections describe the more significant environmental rules that affect our operations.

Clean Air Act

Both federal and state laws require significant reductions in SO2 and NOx emissions that result from burning fossil fuels. In March 2005, the EPA issued regulations with respect to SO2 and NOx emissions (the CAIR). The CAIR required generating facilities in 28 states, including Missouri and Illinois, and the District of Columbia to participate in cap-and-trade programs to reduce annual SO2 emissions, annual NOx emissions, and ozone season NOx emissions.

In December 2008, the United States Court of Appeals for the District of Columbia remanded the CAIR to the EPA for further action to remedy the rule's flaws, but allowed the CAIR's cap-and-trade programs to remain effective until they are replaced by the EPA. In July 2011, the EPA issued the CSAPR as the CAIR replacement. The CSAPR was to become effective on January 1, 2012, for SO2 and annual NOx reductions and on May 1, 2012, for ozone season NOx reductions. In the CSAPR, the EPA developed federal implementation plans for each state covered by this rule; however, each impacted state can develop its own implementation rule starting as early as 2013. The CSAPR establishes emission allowance budgets for each of the states subject to the regulation, including Missouri and Illinois. With the CSAPR, the EPA abandoned CAIR's regional approach to cutting emissions and instead set a pollution budget for each of the impacted states based on the EPA's analysis of each upwind state's contribution to air quality in downwind states. For Missouri and Illinois, emission reductions were required in two phases beginning in 2012, with further reductions in 2014. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, in the SO2 program, in the annual NOx, or in ozone season NOx program. Multiple legal challenges were filed requesting to have CSAPR partially or entirely vacated and to stay the implementation of the CSAPR while the court considers the challenges. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. The stay does not invalidate the rule, but only delays its implementation until a final court ruling is issued. The United States Court of Appeals for the District of Columbia has expedited its consideration of the regulation and will hear arguments on the validity of CSAPR in April 2012. The ultimate outcome of the challenges to the regulation is uncertain. The court could uphold CSAPR or remand it back to the EPA for partial or entire revision. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR.

On December 21, 2011, the EPA issued the final MATS under the Clean Air Act, which require emission reductions for mercury and other hazardous air pollutants, such as acid gases, toxic metals, and particulate matter by setting emission limits equal to the average emissions of the best performing 12% of existing coal and oil-fired electric generating units. Also, the rule requires reductions in hydrogen chloride emissions, which were not regulated previously, and it may require continuous monitoring systems that are not currently in place. The MATS do not require a specific control technology to achieve the emission reductions. The MATS will apply to each unit at a coal-fired power plant; however, emission compliance can be averaged for the entire power plant. Compliance is required by April 2015 or, with a case-by-case extension, by April 2016.

Separately, in January and June 2010, the EPA finalized new ambient air quality standards for SO2 and NO2. It also announced plans for further reductions in the annual national ambient air quality standards for ozone and fine particulates. The state of Illinois and the state of Missouri will be required to develop separate attainment plans to comply with the new ambient air quality standards. Ameren, Ameren Missouri and Genco continue to assess the impacts of these new standards. In September 2011, the EPA withdrew its draft annual national ambient air quality standard for ozone and announced that it was implementing the 2008 national ambient air quality standard for ozone. The EPA is required to revisit this standard again in 2013.

Ameren Missouri's current environmental compliance plan for air emissions from its energy centers includes burning ultra-low-sulfur coal and installing new or optimizing existing pollution control equipment. In July 2011, Ameren Missouri contracted to procure significantly higher volumes of lower-sulfur-content coal than Ameren Missouri's energy centers have historically burned, which will allow Ameren Missouri to eliminate or postpone capital expenditures for pollution control equipment while still achieving required emissions levels. In 2010, Ameren Missouri completed the installation of two scrubbers at its Sioux energy center to reduce SO2 emissions. Currently, Ameren Missouri's compliance plan assumes the installation of two scrubbers within its coal-fired fleet during the next 10 years and precipitator upgrades at multiple energy centers. However, Ameren Missouri is currently evaluating its operations and options to determine how to comply with the additional emission reductions requirements in 2014 set forth in the CSAPR, if ultimately enacted, the MATS, and other recently finalized or proposed EPA regulations.

Existing Illinois state regulations already required Ameren and Genco to reduce their emissions of mercury under the MPS. Ameren's and Genco's review of the MATS indicates that the scope of the federal standards is broader than the MPS, as no exemption exists for smaller coal-fired plants. Additionally, the MATS are more stringent than the MPS because compliance with the MATS is measured on a quarterly basis and, in some cases, a thirty-day rolling basis and not annually, as allowed under state requirements. At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers was primarily due to the expected cost of complying with CSAPR and MATS. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Genco and AERG expect to install additional, or optimize existing, pollution control equipment, or modify operations to meet new and incremental emission reduction requirements under the MPS, the MATS, or the CSAPR as they become effective. Under the MPS, as amended, Illinois generators are required to reduce mercury, SO2, and NOx emissions by 2015. To comply with the MPS and other air emissions laws and regulations, Genco and AERG are installing equipment designed to reduce their emissions of mercury, NOx, and SO2. Genco and AERG have installed a total of three scrubbers at two energy centers. Two additional scrubbers are being constructed at Genco's Newton energy center. As discussed above, the timing of the installation of these scrubbers as well as precipitator upgrades at AERG's E.D. Edwards energy center have been extended. The closure of Genco's Meredosia and Hutsonville energy centers will allow the Merchant Generation segment additional flexibility in the methods to achieve compliance with environmental standards. Merchant Generation and Genco will continue to review and adjust their compliance plans in light of evolving outlooks for power and capacity prices, delivered fuel costs, environment standards and compliance technologies, among other factors.

The completion of Ameren's, Ameren Missouri's and Genco's review of recently finalized environmental regulations and compliance measures could result in significant increases in capital expenditures and operating costs. The compliance costs could be prohibitive at some of our energy centers as the expected return from these investments, at current market prices for energy and capacity, might not justify the required capital expenditures or their continued operation, which could result in the impairment of long-lived assets.

 

Emission Allowances

The Clean Air Act created marketable commodities called allowances under the acid rain program, the NOx budget trading program, the CAIR, and the CSAPR. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, either the SO2, annual NOx, or ozone season NOx programs. As noted above, on December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR including its allowance program. See Note 1 – Summary of Significant Accounting Policies for the SO2 and NOx emission allowance book values that were classified as intangible assets as of December 31, 2011 and 2010, and Note 17 – Goodwill, Impairment and Other Charges for information regarding the emission allowance impairments recorded during 2011 and 2010.

Environmental regulations including the CAIR and the CSAPR, the timing of the installation of pollution control equipment, fuel mix, and the level of operations, will have a significant impact on the number of allowances required for ongoing operations. The CAIR uses the acid rain program's allowances for SO2 emissions and created annual and ozone season NOx allowances. The CSAPR, however, will not rely upon the acid rain program, the NOx budget trading program, or CAIR allowances for its allowance allocation program. Instead, the EPA issued a new type of emissions allowance for each program under the CSAPR. Any unused SO2 allowances, annual NOx allowances, and ozone season NOx allowances issued under CAIR cannot be used for compliance with CSAPR. Ameren, Ameren Missouri and Genco expect to have adequate CAIR allowances for 2012 to avoid needing to make external purchases.

Should the CSAPR become effective as issued, Ameren, Ameren Missouri and Genco are studying their compliance options to identify additional opportunities that may exist for compliance in an economical fashion. Ameren, Ameren Missouri and Genco may be required to purchase emission allowances, if available, to install new or optimize existing pollution control equipment, to limit generation, or take other actions to achieve compliance with the CSAPR in future phase-in years.

Global Climate Change

State and federal authorities, including the United States Congress, have considered initiatives to limit greenhouse gas emissions and to address global climate change. Potential impacts from any climate change legislation or regulation could vary, depending upon proposed CO2 emission limits, the timing of implementation of those limits, the method of distributing any allowances, the degree to which offsets are allowed and available, and provisions for cost-containment measures, such as a "safety valve" provision that provides a maximum price for emission allowances. As a result of our diverse fuel portfolio, our emissions of greenhouse gases vary among our energy centers, but coal-fired power plants are significant sources of CO2. The enactment of a climate change law could result in a significant rise in household costs and rates for electricity could rise significantly. The burden could fall particularly hard on electricity consumers and upon the economy in the Midwest because of the region's reliance on electricity generated by coal-fired power plants. Natural gas emits about half as much CO2 as coal when burned to produce electricity. Therefore, climate change regulation could cause the conversion of coal-fired power plants to natural gas, or the construction of new natural gas plants to replace coal-fired power plants. As a result, economywide shifts to natural gas as a fuel source for electricity generation also could affect the cost of heating for our utility customers and many industrial processes that use natural gas.

In December 2009, the EPA issued its "endangerment finding" under the Clean Air Act which stated that greenhouse gas emissions, including CO2, endanger human health and welfare and that emissions of greenhouse gases from motor vehicles contribute to that endangerment. In March 2010, the EPA issued a determination that greenhouse gas emissions from stationary sources, such as power plants, would be subject to regulation under the Clean Air Act effective the beginning of 2011. As a result of these actions, we are required to consider the emissions of greenhouse gases in any air permit application.

Recognizing the difficulties presented by regulating at once virtually all emitters of greenhouse gases, the EPA finalized in May 2010 regulations, known as the "Tailoring Rule," that established new higher thresholds for regulating greenhouse gas emissions from stationary sources, such as power plants. The Tailoring Rule became effective in January 2011. The rule requires any source that already has an operating permit to have greenhouse-gas-specific provisions added to its permits upon renewal. Currently, all Ameren energy centers have operating permits that, when renewed, may be modified to address greenhouse gas emissions. The Tailoring Rule also provides that if projects performed at major sources result in an increase in emissions of greenhouse gases of at least 75,000 tons per year, measured in CO2 equivalents, such projects could trigger permitting requirements under the NSR programs and the application of best available control technology, if any, to control greenhouse gas emissions. New major sources are also required to obtain such a permit and to install the best available control technology if their greenhouse gas emissions exceed the applicable emissions threshold. Separately, in December 2010, the EPA announced a settlement agreement under which it would propose NSPS for greenhouse gas emissions at new and existing fossil fuel-fired power plants by July 26, 2011 and issue a final standard by May 2012. The EPA has not yet proposed a rule and has not specified a new estimate of when it will issue that standard. It is uncertain whether reductions to greenhouse gas emissions would be required at Ameren's, Ameren Missouri's or Genco's energy centers as a result of any of the EPA's new and future rules. Legal challenges to the EPA's greenhouse gas rules have been filed. Any federal climate change legislation that is enacted may preempt the EPA's regulation of greenhouse gas emissions, including the Tailoring Rule, particularly as it relates to power plant greenhouse gas emissions. The extent to which the Tailoring Rule could have a material impact on our energy centers depends upon how state agencies apply the EPA's guidelines as to what constitutes the best available control technology for greenhouse gas emissions from power plants and whether physical changes or changes in operations subject to the rule occur at our energy centers. Although the EPA has stated its intention to regulate greenhouse gas emissions from stationary sources, such as power plants, congressional action could block or delay that effort.

Future federal and state legislation or regulations that mandate limits on the emission of greenhouse gases would likely result in significant increases in capital expenditures and operating costs, which, in turn, could lead to increased liquidity needs and higher financing costs. Moreover, to the extent Ameren Missouri requests recovery of these costs through rates, its regulators might delay or deny timely recovery of these costs. Excessive costs to comply with future legislation or regulations might force Ameren, Ameren Missouri and Genco as well as other similarly situated electric power generators to close some coal-fired facilities earlier than planned, which could lead to possible impairment of assets and reduced revenues. As a result, mandatory limits could have a material adverse impact on Ameren's, Ameren Missouri's, and Genco's results of operations, financial position, and liquidity.

Recent federal court decisions have considered the application of common law causes of action, such as nuisance, to address damages resulting from global climate change. In June 2011, the United States Supreme Court in State of Connecticut v. American Electric Power rejected state efforts to impose liability for CO2 and greenhouse gases emissions under federal common law. That ruling, however, did not address whether private citizens could pursue causes of action based on state common law. In June 2011, a case called Comer v. Murphy Oil (Comer) was filed in the United States District Court for the Southern District of Mississippi. In this litigation, a Mississippi property owner sued several industrial companies, including Ameren Missouri and Genco, alleging that CO2 emissions created the atmospheric conditions that intensified Hurricane Katrina. Although we are unable to predict the outcome of the Comer litigation on our results of operations, financial position, and liquidity, Ameren believes that it has meritorious defenses. Numerous procedural and substantive challenges are expected in the Comer litigation.

The impact on us of future initiatives related to greenhouse gas emissions and global climate change is unknown. Compliance costs could increase as future federal legislative, federal regulatory, and state-sponsored initiatives to control greenhouse gases continue to progress, making it more likely that some form of greenhouse gas emissions control will eventually be required. Since these initiatives continue to evolve, the impact on our coal-fired energy centers and our customers' costs is unknown, but any impact would probably be negative. Our costs of complying with any mandated federal or state greenhouse gas program could have a material impact on our future results of operations, financial position, and liquidity.

NSR and Clean Air Litigation

The EPA is engaged in an enforcement initiative to determine whether coal-fired power plants failed to comply with the requirements of the NSR and NSPS provisions under the Clean Air Act when the plants implemented modifications. The EPA's inquiries focus on whether projects performed at power plants should have triggered various permitting requirements and the installation of pollution control equipment.

In April 2005, Genco received a request from the EPA for information pursuant to Section 114(a) of the Clean Air Act. The request sought detailed operating and maintenance history data with respect to Genco's Coffeen, Hutsonville, Meredosia, Newton, and Joppa energy centers and AERG's E.D. Edwards and Duck Creek energy centers. In 2006, the EPA issued a second Section 114(a) request to Genco regarding projects at the Newton energy center. All of these facilities are coal-fired energy centers. In September 2008, the EPA issued a third Section 114(a) request regarding projects at all of Ameren's coal-fired energy centers in Illinois. We completed our response to the information requests, but we are unable to predict the outcome of this matter.

Following the issuance of a Notice of Violation, in January 2011, the Department of Justice on behalf of the EPA filed a complaint against Ameren Missouri in the United States District Court for the Eastern District of Missouri. The EPA's complaint alleges that in performing projects at its Rush Island coal-fired energy center, Ameren Missouri violated provisions of the Clean Air Act and Missouri law. In January 2012, the United States District Court granted, in part, Ameren Missouri's motion to dismiss various aspects of the EPA's penalty claims. The EPA's claims for injunctive relief, including to require the installation of pollution control equipment, remain. At present, the complaint does not include Ameren Missouri's other coal-fired energy centers, but the EPA has issued Notices of Violation under its NSR enforcement initiative against the company's Labadie, Meramec, and Sioux coal-fired energy centers. Litigation of this matter could take many years to resolve. Ameren Missouri believes its defenses to the allegations described in the complaint as well as the Notices of Violation are meritorious. Ameren Missouri will defend itself vigorously. However, there can be no assurances that it will be successful in its efforts.

Ultimate resolution of these matters could have a material adverse impact on the future results of operations, financial position, and liquidity of Ameren, Ameren Missouri and Genco. A resolution could result in increased capital expenditures for the installation of pollution control equipment, increased operations and maintenance expenses, and penalties. We are unable to predict the ultimate resolution of these matters or the costs that might be incurred. However, Ameren Missouri has concluded that, while a loss may be reasonably possible, the likelihood of loss is not probable. Therefore, no reserve has been established.

Clean Water Act

In March 2011, the EPA announced a proposed rule applicable to cooling water intake structures at existing power plants that have the ability to withdraw more than 2 million gallons of water per day from a body of water and use at least 25 percent of that water exclusively for cooling. Under the proposed rule, affected facilities would be required either to meet mortality limits for aquatic life impinged on the plant's intake screens or to reduce intake velocity to 0.5 feet per second. The proposed rule also requires plants to meet site-specific entrainment standards or to reduce the cooling water intake flow commensurate with the intake flow of a closed-cycle cooling system. The final rule is scheduled to be issued in July 2012, with compliance expected within eight years thereafter. All coal-fired, nuclear, and combined cycle energy centers at Ameren, Ameren Missouri and Genco with cooling water systems are subject to this proposed rule. The proposed rule did not mandate cooling towers at existing facilities, as other technology options potentially could meet the site-specific standards. Ameren, Ameren Missouri and Genco are currently evaluating the proposed rule, and their assessment of the proposed rule's impacts is ongoing. Therefore, we cannot predict at this time the capital or operating costs associated with compliance. The proposed rule could have an adverse effect on our results of operations, financial position, and liquidity if its implementation requires the installation of cooling towers at our electric generating stations.

In September 2009, the EPA announced its plan to revise the effluent guidelines applicable to steam electric generating units under the Clean Water Act. Effluent guidelines are national standards for wastewater discharges to surface water that are based on the effectiveness of available control technology. The EPA is engaged in information collection and analysis activities in support of this rulemaking. It has indicated that it expects to issue a proposed rule in July 2012 and to finalize the rule in 2014. We are unable at this time to predict the impact of this development.

Remediation

We are involved in a number of remediation actions to clean up hazardous waste sites as required by federal and state law. Such statutes require that responsible parties fund remediation actions regardless of their degree of fault, the legality of original disposal, or the ownership of a disposal site. Ameren Missouri and Ameren Illinois have each been identified by the federal or state governments as a potentially responsible party (PRP) at several contaminated sites. Several of these sites involve facilities that were transferred by our rate-regulated utility operations in Illinois to Genco in May 2000 and to AERG in October 2003. As part of each transfer, Ameren Illinois contractually agreed to indemnify Genco and AERG for remediation costs associated with preexisting environmental contamination at the transferred sites.

As of December 31, 2011, Ameren and Ameren Illinois owned or were otherwise responsible for 44 former MGP sites in Illinois. These are in various stages of investigation, evaluation, and remediation. Based on current estimated plans, Ameren and Ameren Illinois could substantially conclude remediation efforts at most of these sites by 2015. The ICC permits Ameren Illinois to recover remediation and litigation costs associated with its former MGP sites from its electric and natural gas utility customers through environmental adjustment rate riders. To be recoverable, such costs must be prudently and properly incurred. Costs are subject to annual review by the ICC.

As of December 31, 2011, Ameren and Ameren Missouri own or are otherwise responsible for 10 MGP sites in Missouri and one site in Iowa. Ameren Missouri does not currently have a rate rider mechanism that permits recovery of remediation costs associated with MGP sites from utility customers. Ameren Missouri does not have any retail utility operations in Iowa that would provide a source of recovery of these remediation costs.

The following table presents, as of December 31, 2011, the estimated probable obligation to remediate these MGP sites.

 

Ameren Illinois is responsible for the cleanup of a former coal ash landfill in Coffeen, Illinois. As of December 31, 2011, Ameren Illinois estimated that obligation at $0.5 million to $6 million. Ameren Illinois recorded a liability of $0.5 million to represent its estimated minimum obligation for this site, as no other amount within the range was a better estimate. Ameren Illinois is also responsible for the cleanup of a landfill, underground storage tanks, and a water treatment plant in Illinois. As of December 31, 2011, Ameren Illinois recorded a liability of $0.8 million to represent its best estimate of the obligation for these sites.

Ameren Missouri has responsibility for the investigation and potential cleanup of two waste sites in Missouri as a result of federal agency mandates. One of the cleanup sites is a former coal tar distillery located in St. Louis, Missouri. In 2008, the EPA issued an administrative order to Ameren Missouri pertaining to this distillery operated by Koppers Company or its predecessor and successor companies. Ameren Missouri is the current owner of the site, but Ameren Missouri did not conduct any of the manufacturing operations involving coal tar or its byproducts. Ameren Missouri, along with two other PRPs, is currently performing a site investigation. As of December 31, 2011, Ameren Missouri estimated its obligation at $2 million to $5 million. Ameren Missouri has a liability of $2 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate. Ameren Missouri's other active federal agency-mandated cleanup site in Missouri is a site in Cape Girardeau. Ameren Missouri was a customer of an electrical equipment repair and disposal company that previously operated a facility at this site. A trust was established in the early 1990s by several businesses and governmental agencies to fund the cleanup of this site, which was completed in 2005. Ameren Missouri anticipates this trust fund will be sufficient to complete the remaining adjacent off-site cleanup and therefore has no recorded liability at December 31, 2011, related to this site.

Ameren Missouri also has a federal agency mandate to complete a site investigation for a site in Illinois. In 2000, the EPA notified Ameren Missouri and numerous other companies, including Solutia, that former landfills and lagoons in Sauget, Illinois, may contain soil and groundwater contamination. These sites are known as Sauget Area 2. From about 1926 until 1976, Ameren Missouri operated an energy center adjacent to Sauget Area 2. Ameren Missouri currently owns a parcel of property that was once used as a landfill. Under the terms of an Administrative Order on Consent, Ameren Missouri has joined with other PRPs to evaluate the extent of potential contamination with respect to Sauget Area 2.

The Sauget Area 2 investigations overseen by the EPA have been completed. The results have been submitted to the EPA, and a record of decision is expected in 2012. Once the EPA has selected a remedy, if any, it would begin negotiations with various PRPs regarding implementation. Over the last several years, numerous other parties have joined the PRP group. In addition, Pharmacia Corporation and Monsanto Company have agreed to assume the liabilities related to Solutia's former chemical waste landfill in the Sauget Area 2. As of December 31, 2011, Ameren Missouri estimated its obligation at $0.3 million to $10 million. Ameren Missouri has a liability of $0.3 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate.

In December 2004, AERG submitted a plan to the Illinois EPA to address groundwater and surface water issues associated with the recycle pond, ash ponds, and reservoir at the Duck Creek energy center. In 2010, AERG closed the recycle pond system. Remediation work on the recycle pond was completed in the first quarter of 2011, and therefore no liability exists as of December 31, 2011.

Our operations or those of our predecessor companies involve the use of, disposal of, and in appropriate circumstances, the cleanup of substances regulated under environmental protection laws. We are unable to determine whether such practices will result in future environmental commitments or affect our results of operations, financial position, or liquidity.

Ash Management

There has been activity at both state and federal levels regarding additional regulation of ash pond facilities and CCR. In May 2010, the EPA announced proposed new regulations regarding the regulatory framework for the management and disposal of CCR, which could affect future disposal and handling costs at our energy centers. Those proposed regulations include two options for managing CCRs under either solid or hazardous waste regulations, but either alternative would allow for some continued beneficial uses, such as recycling of CCR without classifying it as waste. As part of its proposal, the EPA is considering alternative regulatory approaches that require coal-fired power plants either to close surface impoundments, such as ash ponds, or to retrofit such facilities with liners. Existing impoundments and landfills used for the disposal of CCR would be subject to groundwater monitoring requirements and requirements related to closure and postclosure care under the proposed regulations. Additionally, in January 2010, EPA announced its intent to develop regulations establishing financial responsibility requirements for the electric generation industry, among other industries, and it specifically discussed CCR as a reason for developing the new requirements. Ameren, Ameren Missouri and Genco are currently evaluating all of the proposed regulations to determine whether current management of CCR, including beneficial reuse, and the use of the ash ponds should be altered. Ameren, Ameren Missouri and Genco also are evaluating the potential costs associated with compliance with the proposed regulation of CCR impoundments and landfills, which could be material, if such regulations are adopted.

In addition, the Illinois EPA requested that Ameren, Ameren Missouri and Genco establish groundwater monitoring plans for their ash impoundments in Illinois. Ameren and the Illinois EPA have established a framework for closure of ash ponds in Illinois, including the ash ponds at Venice, Hutsonville, and Duck Creek, when such facilities are ultimately taken out of service. Ameren, Ameren Missouri and Genco have recorded AROs, based on current laws, for the estimated costs of the retirement of their ash ponds.

Pumped-storage Hydroelectric Facility Breach

In December 2005, there was a breach of the upper reservoir at Ameren Missouri's Taum Sauk pumped-storage hydroelectric energy center. This resulted in significant flooding in the local area, which damaged a state park. Ameren Missouri settled with FERC and the state of Missouri all issues associated with the December 2005 Taum Sauk incident. The rebuilt Taum Sauk energy center became fully operational in April 2010.

 

Ameren Missouri included certain capitalized costs associated with enhancements, or costs that would have been incurred absent the breach, at the rebuilt Taum Sauk energy center not recovered from property insurers in its 2010 electric rate case filing. However, in the July 2011 rate order, the MoPSC disallowed all of these capitalized costs associated with the rebuilding of the Taum Sauk energy center. As a result of the order, Ameren and Ameren Missouri each recorded a pretax charge to earnings in 2011 of $89 million to reflect this disallowance. See Note 2 – Rate and Regulatory Matters for additional information about the appeal of the MoPSC's July 2011 electric rate order.

Ameren Missouri had property and liability insurance coverage for the Taum Sauk incident, subject to certain limits and deductibles. Insurance did not cover some lost electric margins or penalties paid to FERC. Ameren Missouri believes that the total cost for cleanup, damage and liabilities, excluding costs to rebuild the upper reservoir, is $209 million, which is the amount Ameren Missouri had paid as of December 31, 2011. As of December 31, 2011, Ameren Missouri had recorded expenses of $37 million, primarily in prior years (2011 – $1 million, 2010 – $1 million, 2009 – $2 million), for items not covered by insurance. Ameren Missouri recorded a $172 million receivable for amounts recoverable from insurance companies under liability coverage. As of December 31, 2011, Ameren Missouri had received $104 million from insurance companies for liability claims, which reduced the insurance receivable balance subject to liability coverage to $68 million.

In June 2010, Ameren Missouri sued an insurance company that was providing Ameren Missouri with liability coverage on the date of the Taum Sauk incident. In the litigation, filed in the United States District Court for the Eastern District of Missouri, Ameren Missouri claimed the insurance company breached its duty to indemnify Ameren Missouri for the losses experienced from the incident. In January 2011, the court ruled that the parties must first pursue alternative dispute resolution under the terms of their coverage agreement. In February 2011, Ameren Missouri filed an appeal of the January ruling with the United States Court of Appeals for the Eighth Circuit, seeking the ability to pursue resolution of this dispute outside of a dispute resolution process under the terms of its coverage agreement.

Until Ameren's remaining liability insurance claims and the related litigation are resolved, we are unable to determine the total impact the breach could have on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity beyond those amounts already recognized.

Asbestos-related Litigation

Ameren, Ameren Missouri, Ameren Illinois and EEI have been named, along with numerous other parties, in a number of lawsuits filed by plaintiffs claiming varying degrees of injury from asbestos exposure. Most have been filed in the Circuit Court of Madison County, Illinois. The total number of defendants named in each case varies, with as many as 272 parties named in some pending cases and as few as two in others. In the cases pending as of December 31, 2011, the average number of parties was 80.

The claims filed against Ameren, Ameren Missouri, Ameren Illinois and Genco allege injury from asbestos exposure during the plaintiffs' activities at our present or former electric generating plants. Former CIPS plants are now owned by Genco, and former CILCO plants are now owned by AERG. As a part of the transfer of ownership of the CIPS and CILCO generating plants, CIPS and CILCO, now Ameren Illinois, contractually agreed to indemnify Genco and AERG, for liabilities associated with asbestos-related claims arising from activities prior to the transfer. Each lawsuit seeks unspecified damages that, if awarded at trial, typically would be shared among the various defendants.

The following table presents the pending asbestos-related lawsuits filed against the Ameren Companies as of December 31, 2011:

 

At December 31, 2011, Ameren, Ameren Missouri, Ameren Illinois and Genco had liabilities of $18 million, $6 million, $12 million, and $- million, respectively, recorded to represent their best estimate of their obligations related to asbestos claims.

Ameren Illinois has a tariff rider to recover the costs of asbestos-related litigation claims, subject to the following terms: 90% of cash expenditures in excess of the amount included in base electric rates are to be recovered from a trust fund that was established when Ameren acquired IP. At December 31, 2011, the trust fund balance was $23 million, including accumulated interest. If cash expenditures are less than the amount in base rates, Ameren Illinois will contribute 90% of the difference to the fund. Once the trust fund is depleted, 90% of allowed cash expenditures in excess of base rates will be recovered through charges assessed to customers under the tariff rider. Following the Ameren Illinois Merger, this rider is applicable only for claims that occurred within IP's historical service territory. Similarly, the rider will permit recovery only from customers within IP's historical service territory.

Illinois Sales and Use Tax Exemptions and Credits

In Exelon Corporation v. Department of Revenue, the Illinois Supreme Court decided in 2009 that electricity is tangible personal property for purposes of the Illinois income tax investment credit. In March 2010, the United States Supreme Court refused to hear the case, and the decision became final. During the second quarter of 2010, Genco and AERG began claiming Illinois sales and use tax exemptions and credits for purchase transactions related to their generation operations. The basis for those claims is that the determination in the Exelon case that electricity is tangible personal property applies to sales and use tax manufacturing exemptions and credits. On November 2, 2011, EEI received a notice of proposed tax liability, documenting the state of Illinois' position that EEI did not qualify for the manufacturing exemption it used during 2010. Genco is challenging the State of Illinois' position. In December 2011, EEI filed a request for review by the Informal Conference Board of the Illinois Department of Revenue. Ameren and Genco do not believe that it is probable that the state of Illinois will prevail and therefore have not recorded a charge to earnings for the loss contingency. From the second quarter of 2010 through December 31, 2011, Ameren and Genco claimed manufacturing exemptions and credits of $27 million and $19 million, respectively.

NOTE 15 – COMMITMENTS AND CONTINGENCIES

We are involved in legal, tax and regulatory proceedings before various courts, regulatory commissions, and governmental agencies with respect to matters that arise in the ordinary course of business, some of which involve substantial amounts of money. We believe that the final disposition of these proceedings, except as otherwise disclosed in these notes to our financial statements, will not have a material adverse effect on our results of operations, financial position, or liquidity.

See also Note 1 – Summary of Significant Accounting Policies, Note 2 – Rate and Regulatory Matters, Note 10 – Callaway Energy Center and Note 14 – Related Party Transactions in this report.

Callaway Energy Center

The following table presents insurance coverage at Ameren Missouri's Callaway energy center at December 31, 2011. The property coverage and the nuclear liability coverage must be renewed on April 1 and January 1, respectively, of each year.

 

Type and Source of Coverage    Maximum Coverages     Maximum Assessments for Single Incidents  

Public liability and nuclear worker liability:

    

American Nuclear Insurers

   $ 375        $        -   

Pool participation

     12,219 (a)      118 (b) 
   $     12,594 (c)      $   118   

Property damage:

    

Nuclear Electric Insurance Ltd.

   $ 2,750 (d)      $     23   

Replacement power:

    

Nuclear Electric Insurance Ltd

   $ 490 (e)      $       9   

Energy Risk Assurance Company

   $ 64 (f)      $        -   

 

(a) Provided through mandatory participation in an industrywide retrospective premium assessment program.
(b) Retrospective premium under Price-Anderson. This is subject to retrospective assessment with respect to a covered loss in excess of $375 million in the event of an incident at any licensed U.S. commercial reactor, payable at $17.5 million per year.
(c) Limit of liability for each incident under the Price-Anderson liability provisions of the Atomic Energy Act of 1954, as amended. A company could be assessed up to $118 million per incident for each licensed reactor it operates with a maximum of $17.5 million per incident to be paid in a calendar year for each reactor. This limit is subject to change to account for the effects of inflation and changes in the number of licensed reactors.
(d) Provides for $500 million in property damage and decontamination, excess property insurance, and premature decommissioning coverage up to $2.25 billion for losses in excess of the $500 million primary coverage.
(e) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. Weekly indemnity up to $4.5 million for 52 weeks, which commences after the first eight weeks of an outage, plus up to $3.6 million per week for a minimum of 71 weeks thereafter for a total not exceeding the policy limit of $490 million.
(f) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. The coverage commences after the first 52 weeks of insurance coverage from Nuclear Electric Insurance Ltd. and is for a weekly indemnity of $900,000 for 71 weeks in excess of the $3.6 million per week set forth above. Energy Risk Assurance Company is an affiliate and has reinsured this coverage with third-party insurance companies. See Note 14 – Related Party Transactions for more information on this affiliate transaction.

The Price-Anderson Act is a federal law that limits the liability for claims from an incident involving any licensed United States commercial nuclear power facility. The limit is based on the number of licensed reactors. The limit of liability and the maximum potential annual payments are adjusted at least every five years for inflation to reflect changes in the Consumer Price Index. The five-year inflationary adjustment as prescribed by the most recent Price-Anderson Act renewal was effective October 29, 2008. Owners of a nuclear reactor cover this exposure through a combination of private insurance and mandatory participation in a financial protection pool, as established by Price-Anderson.

Losses resulting from terrorist attacks are covered under Nuclear Electric Insurance Ltd.'s policies, subject to an industrywide aggregate policy limit of $3.24 billion within a 12-month period for coverage for such terrorist acts.

If losses from a nuclear incident at the Callaway energy center exceed the limits of, or are not covered by, insurance, or if coverage is unavailable, Ameren Missouri is at risk for any uninsured losses. If a serious nuclear incident were to occur, it could have a material adverse effect on Ameren's and Ameren Missouri's results of operations, financial position, or liquidity.

Leases

We lease various facilities, office equipment, plant equipment, and rail cars under operating leases. The following table presents our lease obligations at December 31, 2011:

 

      Total      2012      2013      2014      2015      2016      After 5 Years  

Ameren:(a)

                    

Capital lease payments(b)

   $ 621       $ 33       $ 32       $ 32       $ 33       $ 33       $ 458   

Less amount representing interest

     312         28         27         27         27         27         176   

Present value of minimum capital lease payments

   $ 309       $ 5       $ 5       $ 5       $ 6       $ 6       $ 282   

Operating leases(c)

     307         38         32         26         26         25         160   

Total lease obligations

   $ 616       $ 43       $ 37       $ 31       $ 32       $ 31       $ 442   

Ameren Missouri:

                    

Capital lease payments(b)

   $ 621       $ 33       $ 32       $ 32       $ 33       $ 33       $ 458   

Less amount representing interest

     312         28         27         27         27         27         176   

Present value of minimum capital lease payments

   $ 309       $ 5       $ 5       $ 5       $ 6       $ 6       $ 282   

Operating leases(c)

     134         13         12         12         12         12         73   

Total lease obligations

   $ 443       $ 18       $ 17       $ 17       $ 18       $ 18       $ 355   

Ameren Illinois:

                    

Operating leases(c)

   $ 7       $ 1       $ 1       $ 1       $ 1       $ 1       $ 2   

Genco:

                    

Operating leases(c)

   $ 131       $ 11       $ 11       $ 11       $ 10       $ 11       $ 77   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) See Properties under Part I, Item 2, and Note 3 – Property and Plant, Net of this report for additional information.
(c) Amounts related to certain real estate leases and railroad licenses have indefinite payment periods. Ameren's $2 million annual obligation for these items is included in the 2012 through 2016 columns. The amounts for the indefinite payments are not included in the After 5 Years column because that period is indefinite.

The following table presents total rental expense, included in operating expenses, for the years ended December 31, 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 47       $ 52       $     50   

Ameren Missouri

     29         29         30   

Ameren Illinois

     17         19         19   

Genco

     12         13         15   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

Other Obligations

To supply a portion of the fuel requirements of our generating plants, we have entered into various long-term commitments for the procurement of coal, natural gas, nuclear fuel, and methane gas. We also have entered into various long-term commitments for purchased power and natural gas for distribution. The table below presents our estimated fuel, purchased power, and other commitments at December 31, 2011. Ameren's and Ameren Missouri's coal commitments include multiyear agreements to procure ultra-low-sulfur coal and related transportation from the Powder River Basin in Wyoming. Ameren's and Ameren Missouri's purchased power obligations include a 102-MW power purchase agreement with a wind farm operator that expires in 2024. Ameren's and Ameren Illinois' purchased power obligations include the Ameren Illinois power purchase agreements entered into as part of the IPA-administered power procurement process. Included in the Other column are minimum purchase commitments under contracts for equipment, design and construction, meter reading services, and an Ameren tax credit obligation at December 31, 2011. Ameren's tax credit obligation is a $17 million note payable issued for an investment in a commercial real estate development partnership to acquire tax credits. This note payable was netted against the related investment in "Other assets" on Ameren's balance sheet at December 31, 2011, as Ameren has a legally enforceable right to offset under authoritative accounting guidance.

 

          Coal        Natural
Gas
       Nuclear
Fuel
       Purchased
Power
       Methane
Gas
              Other      Total  

Ameren:(a)

                              

2012

     $ 1,120         $ 398         $ 36         $ 196         $ 1       $ 221       $ 1,972   

2013

       792           295           37           309           3         80         1,516   

2014

       692           220           96           125           3         75         1,211   

2015

       687           116           90           51           3         52         999   

2016

       674           39           100           52           3         62         930   

Thereafter

       968           134           298           746           94         246         2,486   

Total

     $ 4,933         $ 1,202         $ 657         $ 1,479         $ 107       $ 736       $ 9,114   

Ameren Missouri:

                              

2012

     $ 623         $ 63         $ 36         $ 19         $ 1       $ 78       $ 820   

2013

       605           48           37           19           3         50         762   

2014

       625           36           96           19           3         47         826   

2015

       614           19           90           19           3         28         773   

2016

       644           7           100           19           3         38         811   

Thereafter

       921           30           298           155           94         144         1,642   

Total

     $   4,032         $ 203         $ 657         $ 250         $ 107       $ 385       $   5,634   

Ameren Illinois:

                              

2012

     $ -         $ 324         $ -         $ 177         $ -       $ 24       $ 525   

2013

       -           243           -           290           -         22         555   

2014

       -           180           -           106           -         22         308   

2015

       -           94           -           32           -         24         150   

2016

       -           31           -           33           -         24         88   

Thereafter

       -           105           -           591           -         102         798   

Total

     $ -         $ 977         $ -         $ 1,229         $ -       $ 218       $ 2,424   

Genco:

                              

2012

     $ 355         $ 9         $ -         $ -         $ -       $ 98       $ 462   

2013

       108           4           -           -           -         5         117   

2014

       40           3           -           -           -         5         48   

2015

       45           2           -           -           -         -         47   

2016

       -           -           -           -           -         -         -   

Thereafter

       -           -           -           -           -         -         -   

Total

     $ 548         $ 18         $ -         $ -         $ -       $ 108       $ 674   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

Also, as part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company to lock in energy prices for 400 to 1,000 megawatts annually of their round-the-clock power requirements from 2008 to 2012. These commitments are not reflected in the above table. See Note 7 – Derivative Financial Instruments and Note 14 – Related Party Transactions for additional information.

In February 2012, a rate stability procurement for energy products and renewable energy credits was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Ameren Illinois contracted to purchase approximately 13 million megawatthours of energy products at an average price of approximately $31 per megawatthour. Ameren Illinois is currently reviewing the results of the renewable energy credits procurement proceeding.

Ameren Illinois has entered into an agreement to purchase approximately 15.5 billion cubic feet of synthetic natural gas annually over a 10-year period beginning in 2016 for its natural gas customers. The agreement is contingent on the counterparty reaching certain milestones during the project development and the construction of the plant that will produce the synthetic natural gas. Construction has not begun on the plant; therefore, Ameren Illinois' obligations are not yet certain at this time. The agreement was entered into pursuant to an Illinois law which became effective August 2, 2011, and provides that all contract costs for synthetic natural gas incurred by Ameren Illinois are reasonable and prudent and recoverable through the PGA and are not subject to review or disallowance by the ICC.

Environmental Matters

We are subject to various environmental laws and regulations enforced by federal, state, and local authorities. From the beginning phases of siting and development to the ongoing operation of existing or new electric generating, transmission and distribution facilities, natural gas storage, transmission and distribution facilities, our activities involve compliance with diverse environmental laws and regulations. These laws and regulations address emissions, impacts to air, land and water, noise, protected natural and cultural resources (such as wetlands, endangered species and other protected wildlife, and archeological and historical resources), and chemical and waste handling. Complex and lengthy processes are required to obtain approvals, permits, or licenses for new, existing or modified facilities. Additionally, the use and handling of various chemicals or hazardous materials (including wastes) requires release prevention plans and emergency response procedures.

In addition to existing laws and regulations, including the Illinois MPS that applies to our energy centers in Illinois, the EPA is developing numerous new environmental regulations that will have a significant impact on the electric utility industry. These regulations could be particularly burdensome for certain companies, including Ameren, Ameren Missouri and Genco, that operate coal-fired energy centers. Significant new rules proposed or promulgated since the beginning of 2010 include the regulation of greenhouse gas emissions; revised national ambient air quality standards for SO2 and NO2 emissions; the CSAPR, which requires further reductions of SO2 and NOx emissions from power plants; a regulation governing management of CCR and coal ash impoundments; the MATS, which requires reduction of emissions of mercury, toxic metals, and acid gases from power plants; revised NSPS for particulate matter, SO2, and NOx emissions from new sources; and new regulations under the Clean Water Act that could require significant capital expenditures such as new water intake structures or cooling towers at our energy centers. The EPA also plans to propose an additional rule, applicable to new and existing electric generating units, governing NSPS and emission guidelines for greenhouse gas emissions. These new regulations may be litigated, so the timing of their implementation is uncertain, as evidenced by the stay of the CSAPR by the United States Court of Appeals for the District of Columbia on December 30, 2011. Although many details of these future regulations are unknown, the combined effects of the new and proposed environmental regulations may result in significant capital expenditures and/or increased operating costs over the next five to ten years for Ameren, Ameren Missouri and Genco. Actions required to ensure that our facilities and operations are in compliance with environmental laws and regulations could be prohibitively expensive. If they are, these regulations could require us to close or to significantly alter the operation of our energy centers, which could have an adverse effect on our results of operations, financial position, and liquidity, including the impairment of plant assets. Failure to comply with environmental laws and regulations might also result in the imposition of fines, penalties, and injunctive measures.

The estimates in the table below contain all of the known capital costs to comply with existing environmental regulations and our assessment of the potential impacts of the EPA's proposed regulation for CCR, the recently finalized MATS, the stayed CSAPR as currently designed, and the revised national ambient air quality standards for SO2 and NOx emissions as of December 31, 2011. The estimates in the table below assume that CCR will continue to be regarded as nonhazardous. The estimates in the table below do not include the impacts of new regulations proposed by the EPA under the Clean Water Act in March 2011 regarding cooling water intake structures as our evaluation of those impacts is ongoing. The estimates shown in the table below could change significantly depending upon a variety of factors including:

 

Ÿ  

additional federal or state requirements;

Ÿ  

regulation of greenhouse gas emissions;

Ÿ  

new national ambient air quality standards or changes to existing standards for ozone, fine particulates, SO2, and NOx emissions;

Ÿ  

additional rules governing air pollutant transport;

Ÿ  

finalized regulations under the Clean Water Act;

Ÿ  

CCR being classified as hazardous;

Ÿ  

whether the CSAPR is implemented and whether any modifications are made to its existing requirements;

Ÿ  

new technology;

Ÿ  

expected power prices;

Ÿ  

variations in costs of material or labor; and

Ÿ  

alternative compliance strategies or investment decisions.

 

     2012     2013 - 2016     2017 - 2021     Total  

AMO(a)

  $ 55      $ 325 -      $ 400      $ 845 -      $ 1,030      $ 1,225 -      $ 1,485   

Genco

    150        100 -        125        245 -        295        495 -        570   

AERG

    5        20 -        25        80 -        100        105 -        130   

Ameren

  $  210      $  445 -     $  550      $  1,170 -      $  1,425      $  1,825 -       $  2,185   

 

(a) Ameren Missouri's expenditures are expected to be recoverable from ratepayers.

 

The decision to make pollution control equipment investments at our Merchant Generation business depends on whether the expected future market price for power reflects the increased cost for environmental compliance. In early 2012, there has been a decline in the market price for wholesale power because of factors such as declining natural gas prices and the stay of the CSAPR. As a result of this decline in the market price for power, as well as uncertain environmental regulations, Genco is decelerating the construction of two scrubbers at of its Newton energy center. These scrubbers were originally expected to be installed in late 2013 and spring 2014. The ultimate installation of these scrubbers, now estimated to occur between 2017 and 2021 in the table above, has been postponed until such time as the incremental investment necessary for completion is justified by visible market conditions. However, Genco will continue to incur capital costs related to the construction of these scrubbers. The table above includes Genco's estimated costs of approximately $150 million in 2012 and approximately $20 million annually, excluding capitalized interest, from 2013 through 2016 for the construction of the two scrubbers. In addition to Genco's reduction in estimated capital expenditures, AERG is deferring precipitator upgrades at its E.D. Edwards energy center beyond 2016.

The following sections describe the more significant environmental rules that affect our operations.

Clean Air Act

Both federal and state laws require significant reductions in SO2 and NOx emissions that result from burning fossil fuels. In March 2005, the EPA issued regulations with respect to SO2 and NOx emissions (the CAIR). The CAIR required generating facilities in 28 states, including Missouri and Illinois, and the District of Columbia to participate in cap-and-trade programs to reduce annual SO2 emissions, annual NOx emissions, and ozone season NOx emissions.

In December 2008, the United States Court of Appeals for the District of Columbia remanded the CAIR to the EPA for further action to remedy the rule's flaws, but allowed the CAIR's cap-and-trade programs to remain effective until they are replaced by the EPA. In July 2011, the EPA issued the CSAPR as the CAIR replacement. The CSAPR was to become effective on January 1, 2012, for SO2 and annual NOx reductions and on May 1, 2012, for ozone season NOx reductions. In the CSAPR, the EPA developed federal implementation plans for each state covered by this rule; however, each impacted state can develop its own implementation rule starting as early as 2013. The CSAPR establishes emission allowance budgets for each of the states subject to the regulation, including Missouri and Illinois. With the CSAPR, the EPA abandoned CAIR's regional approach to cutting emissions and instead set a pollution budget for each of the impacted states based on the EPA's analysis of each upwind state's contribution to air quality in downwind states. For Missouri and Illinois, emission reductions were required in two phases beginning in 2012, with further reductions in 2014. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, in the SO2 program, in the annual NOx, or in ozone season NOx program. Multiple legal challenges were filed requesting to have CSAPR partially or entirely vacated and to stay the implementation of the CSAPR while the court considers the challenges. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. The stay does not invalidate the rule, but only delays its implementation until a final court ruling is issued. The United States Court of Appeals for the District of Columbia has expedited its consideration of the regulation and will hear arguments on the validity of CSAPR in April 2012. The ultimate outcome of the challenges to the regulation is uncertain. The court could uphold CSAPR or remand it back to the EPA for partial or entire revision. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR.

On December 21, 2011, the EPA issued the final MATS under the Clean Air Act, which require emission reductions for mercury and other hazardous air pollutants, such as acid gases, toxic metals, and particulate matter by setting emission limits equal to the average emissions of the best performing 12% of existing coal and oil-fired electric generating units. Also, the rule requires reductions in hydrogen chloride emissions, which were not regulated previously, and it may require continuous monitoring systems that are not currently in place. The MATS do not require a specific control technology to achieve the emission reductions. The MATS will apply to each unit at a coal-fired power plant; however, emission compliance can be averaged for the entire power plant. Compliance is required by April 2015 or, with a case-by-case extension, by April 2016.

Separately, in January and June 2010, the EPA finalized new ambient air quality standards for SO2 and NO2. It also announced plans for further reductions in the annual national ambient air quality standards for ozone and fine particulates. The state of Illinois and the state of Missouri will be required to develop separate attainment plans to comply with the new ambient air quality standards. Ameren, Ameren Missouri and Genco continue to assess the impacts of these new standards. In September 2011, the EPA withdrew its draft annual national ambient air quality standard for ozone and announced that it was implementing the 2008 national ambient air quality standard for ozone. The EPA is required to revisit this standard again in 2013.

Ameren Missouri's current environmental compliance plan for air emissions from its energy centers includes burning ultra-low-sulfur coal and installing new or optimizing existing pollution control equipment. In July 2011, Ameren Missouri contracted to procure significantly higher volumes of lower-sulfur-content coal than Ameren Missouri's energy centers have historically burned, which will allow Ameren Missouri to eliminate or postpone capital expenditures for pollution control equipment while still achieving required emissions levels. In 2010, Ameren Missouri completed the installation of two scrubbers at its Sioux energy center to reduce SO2 emissions. Currently, Ameren Missouri's compliance plan assumes the installation of two scrubbers within its coal-fired fleet during the next 10 years and precipitator upgrades at multiple energy centers. However, Ameren Missouri is currently evaluating its operations and options to determine how to comply with the additional emission reductions requirements in 2014 set forth in the CSAPR, if ultimately enacted, the MATS, and other recently finalized or proposed EPA regulations.

Existing Illinois state regulations already required Ameren and Genco to reduce their emissions of mercury under the MPS. Ameren's and Genco's review of the MATS indicates that the scope of the federal standards is broader than the MPS, as no exemption exists for smaller coal-fired plants. Additionally, the MATS are more stringent than the MPS because compliance with the MATS is measured on a quarterly basis and, in some cases, a thirty-day rolling basis and not annually, as allowed under state requirements. At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers was primarily due to the expected cost of complying with CSAPR and MATS. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Genco and AERG expect to install additional, or optimize existing, pollution control equipment, or modify operations to meet new and incremental emission reduction requirements under the MPS, the MATS, or the CSAPR as they become effective. Under the MPS, as amended, Illinois generators are required to reduce mercury, SO2, and NOx emissions by 2015. To comply with the MPS and other air emissions laws and regulations, Genco and AERG are installing equipment designed to reduce their emissions of mercury, NOx, and SO2. Genco and AERG have installed a total of three scrubbers at two energy centers. Two additional scrubbers are being constructed at Genco's Newton energy center. As discussed above, the timing of the installation of these scrubbers as well as precipitator upgrades at AERG's E.D. Edwards energy center have been extended. The closure of Genco's Meredosia and Hutsonville energy centers will allow the Merchant Generation segment additional flexibility in the methods to achieve compliance with environmental standards. Merchant Generation and Genco will continue to review and adjust their compliance plans in light of evolving outlooks for power and capacity prices, delivered fuel costs, environment standards and compliance technologies, among other factors.

The completion of Ameren's, Ameren Missouri's and Genco's review of recently finalized environmental regulations and compliance measures could result in significant increases in capital expenditures and operating costs. The compliance costs could be prohibitive at some of our energy centers as the expected return from these investments, at current market prices for energy and capacity, might not justify the required capital expenditures or their continued operation, which could result in the impairment of long-lived assets.

 

Emission Allowances

The Clean Air Act created marketable commodities called allowances under the acid rain program, the NOx budget trading program, the CAIR, and the CSAPR. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, either the SO2, annual NOx, or ozone season NOx programs. As noted above, on December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR including its allowance program. See Note 1 – Summary of Significant Accounting Policies for the SO2 and NOx emission allowance book values that were classified as intangible assets as of December 31, 2011 and 2010, and Note 17 – Goodwill, Impairment and Other Charges for information regarding the emission allowance impairments recorded during 2011 and 2010.

Environmental regulations including the CAIR and the CSAPR, the timing of the installation of pollution control equipment, fuel mix, and the level of operations, will have a significant impact on the number of allowances required for ongoing operations. The CAIR uses the acid rain program's allowances for SO2 emissions and created annual and ozone season NOx allowances. The CSAPR, however, will not rely upon the acid rain program, the NOx budget trading program, or CAIR allowances for its allowance allocation program. Instead, the EPA issued a new type of emissions allowance for each program under the CSAPR. Any unused SO2 allowances, annual NOx allowances, and ozone season NOx allowances issued under CAIR cannot be used for compliance with CSAPR. Ameren, Ameren Missouri and Genco expect to have adequate CAIR allowances for 2012 to avoid needing to make external purchases.

Should the CSAPR become effective as issued, Ameren, Ameren Missouri and Genco are studying their compliance options to identify additional opportunities that may exist for compliance in an economical fashion. Ameren, Ameren Missouri and Genco may be required to purchase emission allowances, if available, to install new or optimize existing pollution control equipment, to limit generation, or take other actions to achieve compliance with the CSAPR in future phase-in years.

Global Climate Change

State and federal authorities, including the United States Congress, have considered initiatives to limit greenhouse gas emissions and to address global climate change. Potential impacts from any climate change legislation or regulation could vary, depending upon proposed CO2 emission limits, the timing of implementation of those limits, the method of distributing any allowances, the degree to which offsets are allowed and available, and provisions for cost-containment measures, such as a "safety valve" provision that provides a maximum price for emission allowances. As a result of our diverse fuel portfolio, our emissions of greenhouse gases vary among our energy centers, but coal-fired power plants are significant sources of CO2. The enactment of a climate change law could result in a significant rise in household costs and rates for electricity could rise significantly. The burden could fall particularly hard on electricity consumers and upon the economy in the Midwest because of the region's reliance on electricity generated by coal-fired power plants. Natural gas emits about half as much CO2 as coal when burned to produce electricity. Therefore, climate change regulation could cause the conversion of coal-fired power plants to natural gas, or the construction of new natural gas plants to replace coal-fired power plants. As a result, economywide shifts to natural gas as a fuel source for electricity generation also could affect the cost of heating for our utility customers and many industrial processes that use natural gas.

In December 2009, the EPA issued its "endangerment finding" under the Clean Air Act which stated that greenhouse gas emissions, including CO2, endanger human health and welfare and that emissions of greenhouse gases from motor vehicles contribute to that endangerment. In March 2010, the EPA issued a determination that greenhouse gas emissions from stationary sources, such as power plants, would be subject to regulation under the Clean Air Act effective the beginning of 2011. As a result of these actions, we are required to consider the emissions of greenhouse gases in any air permit application.

Recognizing the difficulties presented by regulating at once virtually all emitters of greenhouse gases, the EPA finalized in May 2010 regulations, known as the "Tailoring Rule," that established new higher thresholds for regulating greenhouse gas emissions from stationary sources, such as power plants. The Tailoring Rule became effective in January 2011. The rule requires any source that already has an operating permit to have greenhouse-gas-specific provisions added to its permits upon renewal. Currently, all Ameren energy centers have operating permits that, when renewed, may be modified to address greenhouse gas emissions. The Tailoring Rule also provides that if projects performed at major sources result in an increase in emissions of greenhouse gases of at least 75,000 tons per year, measured in CO2 equivalents, such projects could trigger permitting requirements under the NSR programs and the application of best available control technology, if any, to control greenhouse gas emissions. New major sources are also required to obtain such a permit and to install the best available control technology if their greenhouse gas emissions exceed the applicable emissions threshold. Separately, in December 2010, the EPA announced a settlement agreement under which it would propose NSPS for greenhouse gas emissions at new and existing fossil fuel-fired power plants by July 26, 2011 and issue a final standard by May 2012. The EPA has not yet proposed a rule and has not specified a new estimate of when it will issue that standard. It is uncertain whether reductions to greenhouse gas emissions would be required at Ameren's, Ameren Missouri's or Genco's energy centers as a result of any of the EPA's new and future rules. Legal challenges to the EPA's greenhouse gas rules have been filed. Any federal climate change legislation that is enacted may preempt the EPA's regulation of greenhouse gas emissions, including the Tailoring Rule, particularly as it relates to power plant greenhouse gas emissions. The extent to which the Tailoring Rule could have a material impact on our energy centers depends upon how state agencies apply the EPA's guidelines as to what constitutes the best available control technology for greenhouse gas emissions from power plants and whether physical changes or changes in operations subject to the rule occur at our energy centers. Although the EPA has stated its intention to regulate greenhouse gas emissions from stationary sources, such as power plants, congressional action could block or delay that effort.

Future federal and state legislation or regulations that mandate limits on the emission of greenhouse gases would likely result in significant increases in capital expenditures and operating costs, which, in turn, could lead to increased liquidity needs and higher financing costs. Moreover, to the extent Ameren Missouri requests recovery of these costs through rates, its regulators might delay or deny timely recovery of these costs. Excessive costs to comply with future legislation or regulations might force Ameren, Ameren Missouri and Genco as well as other similarly situated electric power generators to close some coal-fired facilities earlier than planned, which could lead to possible impairment of assets and reduced revenues. As a result, mandatory limits could have a material adverse impact on Ameren's, Ameren Missouri's, and Genco's results of operations, financial position, and liquidity.

Recent federal court decisions have considered the application of common law causes of action, such as nuisance, to address damages resulting from global climate change. In June 2011, the United States Supreme Court in State of Connecticut v. American Electric Power rejected state efforts to impose liability for CO2 and greenhouse gases emissions under federal common law. That ruling, however, did not address whether private citizens could pursue causes of action based on state common law. In June 2011, a case called Comer v. Murphy Oil (Comer) was filed in the United States District Court for the Southern District of Mississippi. In this litigation, a Mississippi property owner sued several industrial companies, including Ameren Missouri and Genco, alleging that CO2 emissions created the atmospheric conditions that intensified Hurricane Katrina. Although we are unable to predict the outcome of the Comer litigation on our results of operations, financial position, and liquidity, Ameren believes that it has meritorious defenses. Numerous procedural and substantive challenges are expected in the Comer litigation.

The impact on us of future initiatives related to greenhouse gas emissions and global climate change is unknown. Compliance costs could increase as future federal legislative, federal regulatory, and state-sponsored initiatives to control greenhouse gases continue to progress, making it more likely that some form of greenhouse gas emissions control will eventually be required. Since these initiatives continue to evolve, the impact on our coal-fired energy centers and our customers' costs is unknown, but any impact would probably be negative. Our costs of complying with any mandated federal or state greenhouse gas program could have a material impact on our future results of operations, financial position, and liquidity.

NSR and Clean Air Litigation

The EPA is engaged in an enforcement initiative to determine whether coal-fired power plants failed to comply with the requirements of the NSR and NSPS provisions under the Clean Air Act when the plants implemented modifications. The EPA's inquiries focus on whether projects performed at power plants should have triggered various permitting requirements and the installation of pollution control equipment.

In April 2005, Genco received a request from the EPA for information pursuant to Section 114(a) of the Clean Air Act. The request sought detailed operating and maintenance history data with respect to Genco's Coffeen, Hutsonville, Meredosia, Newton, and Joppa energy centers and AERG's E.D. Edwards and Duck Creek energy centers. In 2006, the EPA issued a second Section 114(a) request to Genco regarding projects at the Newton energy center. All of these facilities are coal-fired energy centers. In September 2008, the EPA issued a third Section 114(a) request regarding projects at all of Ameren's coal-fired energy centers in Illinois. We completed our response to the information requests, but we are unable to predict the outcome of this matter.

Following the issuance of a Notice of Violation, in January 2011, the Department of Justice on behalf of the EPA filed a complaint against Ameren Missouri in the United States District Court for the Eastern District of Missouri. The EPA's complaint alleges that in performing projects at its Rush Island coal-fired energy center, Ameren Missouri violated provisions of the Clean Air Act and Missouri law. In January 2012, the United States District Court granted, in part, Ameren Missouri's motion to dismiss various aspects of the EPA's penalty claims. The EPA's claims for injunctive relief, including to require the installation of pollution control equipment, remain. At present, the complaint does not include Ameren Missouri's other coal-fired energy centers, but the EPA has issued Notices of Violation under its NSR enforcement initiative against the company's Labadie, Meramec, and Sioux coal-fired energy centers. Litigation of this matter could take many years to resolve. Ameren Missouri believes its defenses to the allegations described in the complaint as well as the Notices of Violation are meritorious. Ameren Missouri will defend itself vigorously. However, there can be no assurances that it will be successful in its efforts.

Ultimate resolution of these matters could have a material adverse impact on the future results of operations, financial position, and liquidity of Ameren, Ameren Missouri and Genco. A resolution could result in increased capital expenditures for the installation of pollution control equipment, increased operations and maintenance expenses, and penalties. We are unable to predict the ultimate resolution of these matters or the costs that might be incurred. However, Ameren Missouri has concluded that, while a loss may be reasonably possible, the likelihood of loss is not probable. Therefore, no reserve has been established.

Clean Water Act

In March 2011, the EPA announced a proposed rule applicable to cooling water intake structures at existing power plants that have the ability to withdraw more than 2 million gallons of water per day from a body of water and use at least 25 percent of that water exclusively for cooling. Under the proposed rule, affected facilities would be required either to meet mortality limits for aquatic life impinged on the plant's intake screens or to reduce intake velocity to 0.5 feet per second. The proposed rule also requires plants to meet site-specific entrainment standards or to reduce the cooling water intake flow commensurate with the intake flow of a closed-cycle cooling system. The final rule is scheduled to be issued in July 2012, with compliance expected within eight years thereafter. All coal-fired, nuclear, and combined cycle energy centers at Ameren, Ameren Missouri and Genco with cooling water systems are subject to this proposed rule. The proposed rule did not mandate cooling towers at existing facilities, as other technology options potentially could meet the site-specific standards. Ameren, Ameren Missouri and Genco are currently evaluating the proposed rule, and their assessment of the proposed rule's impacts is ongoing. Therefore, we cannot predict at this time the capital or operating costs associated with compliance. The proposed rule could have an adverse effect on our results of operations, financial position, and liquidity if its implementation requires the installation of cooling towers at our electric generating stations.

In September 2009, the EPA announced its plan to revise the effluent guidelines applicable to steam electric generating units under the Clean Water Act. Effluent guidelines are national standards for wastewater discharges to surface water that are based on the effectiveness of available control technology. The EPA is engaged in information collection and analysis activities in support of this rulemaking. It has indicated that it expects to issue a proposed rule in July 2012 and to finalize the rule in 2014. We are unable at this time to predict the impact of this development.

Remediation

We are involved in a number of remediation actions to clean up hazardous waste sites as required by federal and state law. Such statutes require that responsible parties fund remediation actions regardless of their degree of fault, the legality of original disposal, or the ownership of a disposal site. Ameren Missouri and Ameren Illinois have each been identified by the federal or state governments as a potentially responsible party (PRP) at several contaminated sites. Several of these sites involve facilities that were transferred by our rate-regulated utility operations in Illinois to Genco in May 2000 and to AERG in October 2003. As part of each transfer, Ameren Illinois contractually agreed to indemnify Genco and AERG for remediation costs associated with preexisting environmental contamination at the transferred sites.

As of December 31, 2011, Ameren and Ameren Illinois owned or were otherwise responsible for 44 former MGP sites in Illinois. These are in various stages of investigation, evaluation, and remediation. Based on current estimated plans, Ameren and Ameren Illinois could substantially conclude remediation efforts at most of these sites by 2015. The ICC permits Ameren Illinois to recover remediation and litigation costs associated with its former MGP sites from its electric and natural gas utility customers through environmental adjustment rate riders. To be recoverable, such costs must be prudently and properly incurred. Costs are subject to annual review by the ICC.

As of December 31, 2011, Ameren and Ameren Missouri own or are otherwise responsible for 10 MGP sites in Missouri and one site in Iowa. Ameren Missouri does not currently have a rate rider mechanism that permits recovery of remediation costs associated with MGP sites from utility customers. Ameren Missouri does not have any retail utility operations in Iowa that would provide a source of recovery of these remediation costs.

The following table presents, as of December 31, 2011, the estimated probable obligation to remediate these MGP sites.

 

      Estimate     

Recorded
Liability(a)

 
      Low      High     

Ameren

   $     107       $     183       $     107   

Ameren Missouri

     3         4         3   

Ameren Illinois

     104         179         104   

 

(a) Recorded liability represents the estimated minimum probable obligations, as no other amount within the range provided a better estimate.

Ameren Illinois is responsible for the cleanup of a former coal ash landfill in Coffeen, Illinois. As of December 31, 2011, Ameren Illinois estimated that obligation at $0.5 million to $6 million. Ameren Illinois recorded a liability of $0.5 million to represent its estimated minimum obligation for this site, as no other amount within the range was a better estimate. Ameren Illinois is also responsible for the cleanup of a landfill, underground storage tanks, and a water treatment plant in Illinois. As of December 31, 2011, Ameren Illinois recorded a liability of $0.8 million to represent its best estimate of the obligation for these sites.

Ameren Missouri has responsibility for the investigation and potential cleanup of two waste sites in Missouri as a result of federal agency mandates. One of the cleanup sites is a former coal tar distillery located in St. Louis, Missouri. In 2008, the EPA issued an administrative order to Ameren Missouri pertaining to this distillery operated by Koppers Company or its predecessor and successor companies. Ameren Missouri is the current owner of the site, but Ameren Missouri did not conduct any of the manufacturing operations involving coal tar or its byproducts. Ameren Missouri, along with two other PRPs, is currently performing a site investigation. As of December 31, 2011, Ameren Missouri estimated its obligation at $2 million to $5 million. Ameren Missouri has a liability of $2 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate. Ameren Missouri's other active federal agency-mandated cleanup site in Missouri is a site in Cape Girardeau. Ameren Missouri was a customer of an electrical equipment repair and disposal company that previously operated a facility at this site. A trust was established in the early 1990s by several businesses and governmental agencies to fund the cleanup of this site, which was completed in 2005. Ameren Missouri anticipates this trust fund will be sufficient to complete the remaining adjacent off-site cleanup and therefore has no recorded liability at December 31, 2011, related to this site.

Ameren Missouri also has a federal agency mandate to complete a site investigation for a site in Illinois. In 2000, the EPA notified Ameren Missouri and numerous other companies, including Solutia, that former landfills and lagoons in Sauget, Illinois, may contain soil and groundwater contamination. These sites are known as Sauget Area 2. From about 1926 until 1976, Ameren Missouri operated an energy center adjacent to Sauget Area 2. Ameren Missouri currently owns a parcel of property that was once used as a landfill. Under the terms of an Administrative Order on Consent, Ameren Missouri has joined with other PRPs to evaluate the extent of potential contamination with respect to Sauget Area 2.

The Sauget Area 2 investigations overseen by the EPA have been completed. The results have been submitted to the EPA, and a record of decision is expected in 2012. Once the EPA has selected a remedy, if any, it would begin negotiations with various PRPs regarding implementation. Over the last several years, numerous other parties have joined the PRP group. In addition, Pharmacia Corporation and Monsanto Company have agreed to assume the liabilities related to Solutia's former chemical waste landfill in the Sauget Area 2. As of December 31, 2011, Ameren Missouri estimated its obligation at $0.3 million to $10 million. Ameren Missouri has a liability of $0.3 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate.

In December 2004, AERG submitted a plan to the Illinois EPA to address groundwater and surface water issues associated with the recycle pond, ash ponds, and reservoir at the Duck Creek energy center. In 2010, AERG closed the recycle pond system. Remediation work on the recycle pond was completed in the first quarter of 2011, and therefore no liability exists as of December 31, 2011.

Our operations or those of our predecessor companies involve the use of, disposal of, and in appropriate circumstances, the cleanup of substances regulated under environmental protection laws. We are unable to determine whether such practices will result in future environmental commitments or affect our results of operations, financial position, or liquidity.

Ash Management

There has been activity at both state and federal levels regarding additional regulation of ash pond facilities and CCR. In May 2010, the EPA announced proposed new regulations regarding the regulatory framework for the management and disposal of CCR, which could affect future disposal and handling costs at our energy centers. Those proposed regulations include two options for managing CCRs under either solid or hazardous waste regulations, but either alternative would allow for some continued beneficial uses, such as recycling of CCR without classifying it as waste. As part of its proposal, the EPA is considering alternative regulatory approaches that require coal-fired power plants either to close surface impoundments, such as ash ponds, or to retrofit such facilities with liners. Existing impoundments and landfills used for the disposal of CCR would be subject to groundwater monitoring requirements and requirements related to closure and postclosure care under the proposed regulations. Additionally, in January 2010, EPA announced its intent to develop regulations establishing financial responsibility requirements for the electric generation industry, among other industries, and it specifically discussed CCR as a reason for developing the new requirements. Ameren, Ameren Missouri and Genco are currently evaluating all of the proposed regulations to determine whether current management of CCR, including beneficial reuse, and the use of the ash ponds should be altered. Ameren, Ameren Missouri and Genco also are evaluating the potential costs associated with compliance with the proposed regulation of CCR impoundments and landfills, which could be material, if such regulations are adopted.

In addition, the Illinois EPA requested that Ameren, Ameren Missouri and Genco establish groundwater monitoring plans for their ash impoundments in Illinois. Ameren and the Illinois EPA have established a framework for closure of ash ponds in Illinois, including the ash ponds at Venice, Hutsonville, and Duck Creek, when such facilities are ultimately taken out of service. Ameren, Ameren Missouri and Genco have recorded AROs, based on current laws, for the estimated costs of the retirement of their ash ponds.

Pumped-storage Hydroelectric Facility Breach

In December 2005, there was a breach of the upper reservoir at Ameren Missouri's Taum Sauk pumped-storage hydroelectric energy center. This resulted in significant flooding in the local area, which damaged a state park. Ameren Missouri settled with FERC and the state of Missouri all issues associated with the December 2005 Taum Sauk incident. The rebuilt Taum Sauk energy center became fully operational in April 2010.

 

Ameren Missouri included certain capitalized costs associated with enhancements, or costs that would have been incurred absent the breach, at the rebuilt Taum Sauk energy center not recovered from property insurers in its 2010 electric rate case filing. However, in the July 2011 rate order, the MoPSC disallowed all of these capitalized costs associated with the rebuilding of the Taum Sauk energy center. As a result of the order, Ameren and Ameren Missouri each recorded a pretax charge to earnings in 2011 of $89 million to reflect this disallowance. See Note 2 – Rate and Regulatory Matters for additional information about the appeal of the MoPSC's July 2011 electric rate order.

Ameren Missouri had property and liability insurance coverage for the Taum Sauk incident, subject to certain limits and deductibles. Insurance did not cover some lost electric margins or penalties paid to FERC. Ameren Missouri believes that the total cost for cleanup, damage and liabilities, excluding costs to rebuild the upper reservoir, is $209 million, which is the amount Ameren Missouri had paid as of December 31, 2011. As of December 31, 2011, Ameren Missouri had recorded expenses of $37 million, primarily in prior years (2011 – $1 million, 2010 – $1 million, 2009 – $2 million), for items not covered by insurance. Ameren Missouri recorded a $172 million receivable for amounts recoverable from insurance companies under liability coverage. As of December 31, 2011, Ameren Missouri had received $104 million from insurance companies for liability claims, which reduced the insurance receivable balance subject to liability coverage to $68 million.

In June 2010, Ameren Missouri sued an insurance company that was providing Ameren Missouri with liability coverage on the date of the Taum Sauk incident. In the litigation, filed in the United States District Court for the Eastern District of Missouri, Ameren Missouri claimed the insurance company breached its duty to indemnify Ameren Missouri for the losses experienced from the incident. In January 2011, the court ruled that the parties must first pursue alternative dispute resolution under the terms of their coverage agreement. In February 2011, Ameren Missouri filed an appeal of the January ruling with the United States Court of Appeals for the Eighth Circuit, seeking the ability to pursue resolution of this dispute outside of a dispute resolution process under the terms of its coverage agreement.

Until Ameren's remaining liability insurance claims and the related litigation are resolved, we are unable to determine the total impact the breach could have on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity beyond those amounts already recognized.

Asbestos-related Litigation

Ameren, Ameren Missouri, Ameren Illinois and EEI have been named, along with numerous other parties, in a number of lawsuits filed by plaintiffs claiming varying degrees of injury from asbestos exposure. Most have been filed in the Circuit Court of Madison County, Illinois. The total number of defendants named in each case varies, with as many as 272 parties named in some pending cases and as few as two in others. In the cases pending as of December 31, 2011, the average number of parties was 80.

The claims filed against Ameren, Ameren Missouri, Ameren Illinois and Genco allege injury from asbestos exposure during the plaintiffs' activities at our present or former electric generating plants. Former CIPS plants are now owned by Genco, and former CILCO plants are now owned by AERG. As a part of the transfer of ownership of the CIPS and CILCO generating plants, CIPS and CILCO, now Ameren Illinois, contractually agreed to indemnify Genco and AERG, for liabilities associated with asbestos-related claims arising from activities prior to the transfer. Each lawsuit seeks unspecified damages that, if awarded at trial, typically would be shared among the various defendants.

The following table presents the pending asbestos-related lawsuits filed against the Ameren Companies as of December 31, 2011:

 

Ameren  

Ameren

Missouri

 

Ameren

Illinois

  Genco   Total(a)

4

  53   77   (b)   93

 

(a) Total does not equal the sum of the subsidiary unit lawsuits because some of the lawsuits name multiple Ameren entities as defendants.
(b) As of December 31, 2011, six asbestos-related lawsuits were pending against EEI. The general liability insurance maintained by EEI provides coverage with respect to liabilities arising from asbestos-related claims.

At December 31, 2011, Ameren, Ameren Missouri, Ameren Illinois and Genco had liabilities of $18 million, $6 million, $12 million, and $- million, respectively, recorded to represent their best estimate of their obligations related to asbestos claims.

Ameren Illinois has a tariff rider to recover the costs of asbestos-related litigation claims, subject to the following terms: 90% of cash expenditures in excess of the amount included in base electric rates are to be recovered from a trust fund that was established when Ameren acquired IP. At December 31, 2011, the trust fund balance was $23 million, including accumulated interest. If cash expenditures are less than the amount in base rates, Ameren Illinois will contribute 90% of the difference to the fund. Once the trust fund is depleted, 90% of allowed cash expenditures in excess of base rates will be recovered through charges assessed to customers under the tariff rider. Following the Ameren Illinois Merger, this rider is applicable only for claims that occurred within IP's historical service territory. Similarly, the rider will permit recovery only from customers within IP's historical service territory.

Illinois Sales and Use Tax Exemptions and Credits

In Exelon Corporation v. Department of Revenue, the Illinois Supreme Court decided in 2009 that electricity is tangible personal property for purposes of the Illinois income tax investment credit. In March 2010, the United States Supreme Court refused to hear the case, and the decision became final. During the second quarter of 2010, Genco and AERG began claiming Illinois sales and use tax exemptions and credits for purchase transactions related to their generation operations. The basis for those claims is that the determination in the Exelon case that electricity is tangible personal property applies to sales and use tax manufacturing exemptions and credits. On November 2, 2011, EEI received a notice of proposed tax liability, documenting the state of Illinois' position that EEI did not qualify for the manufacturing exemption it used during 2010. Genco is challenging the State of Illinois' position. In December 2011, EEI filed a request for review by the Informal Conference Board of the Illinois Department of Revenue. Ameren and Genco do not believe that it is probable that the state of Illinois will prevail and therefore have not recorded a charge to earnings for the loss contingency. From the second quarter of 2010 through December 31, 2011, Ameren and Genco claimed manufacturing exemptions and credits of $27 million and $19 million, respectively.

NOTE 15 – COMMITMENTS AND CONTINGENCIES

We are involved in legal, tax and regulatory proceedings before various courts, regulatory commissions, and governmental agencies with respect to matters that arise in the ordinary course of business, some of which involve substantial amounts of money. We believe that the final disposition of these proceedings, except as otherwise disclosed in these notes to our financial statements, will not have a material adverse effect on our results of operations, financial position, or liquidity.

See also Note 1 – Summary of Significant Accounting Policies, Note 2 – Rate and Regulatory Matters, Note 10 – Callaway Energy Center and Note 14 – Related Party Transactions in this report.

Callaway Energy Center

The following table presents insurance coverage at Ameren Missouri's Callaway energy center at December 31, 2011. The property coverage and the nuclear liability coverage must be renewed on April 1 and January 1, respectively, of each year.

 

Type and Source of Coverage    Maximum Coverages     Maximum Assessments for Single Incidents  

Public liability and nuclear worker liability:

    

American Nuclear Insurers

   $ 375        $        -   

Pool participation

     12,219 (a)      118 (b) 
   $     12,594 (c)      $   118   

Property damage:

    

Nuclear Electric Insurance Ltd.

   $ 2,750 (d)      $     23   

Replacement power:

    

Nuclear Electric Insurance Ltd

   $ 490 (e)      $       9   

Energy Risk Assurance Company

   $ 64 (f)      $        -   

 

(a) Provided through mandatory participation in an industrywide retrospective premium assessment program.
(b) Retrospective premium under Price-Anderson. This is subject to retrospective assessment with respect to a covered loss in excess of $375 million in the event of an incident at any licensed U.S. commercial reactor, payable at $17.5 million per year.
(c) Limit of liability for each incident under the Price-Anderson liability provisions of the Atomic Energy Act of 1954, as amended. A company could be assessed up to $118 million per incident for each licensed reactor it operates with a maximum of $17.5 million per incident to be paid in a calendar year for each reactor. This limit is subject to change to account for the effects of inflation and changes in the number of licensed reactors.
(d) Provides for $500 million in property damage and decontamination, excess property insurance, and premature decommissioning coverage up to $2.25 billion for losses in excess of the $500 million primary coverage.
(e) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. Weekly indemnity up to $4.5 million for 52 weeks, which commences after the first eight weeks of an outage, plus up to $3.6 million per week for a minimum of 71 weeks thereafter for a total not exceeding the policy limit of $490 million.
(f) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. The coverage commences after the first 52 weeks of insurance coverage from Nuclear Electric Insurance Ltd. and is for a weekly indemnity of $900,000 for 71 weeks in excess of the $3.6 million per week set forth above. Energy Risk Assurance Company is an affiliate and has reinsured this coverage with third-party insurance companies. See Note 14 – Related Party Transactions for more information on this affiliate transaction.

The Price-Anderson Act is a federal law that limits the liability for claims from an incident involving any licensed United States commercial nuclear power facility. The limit is based on the number of licensed reactors. The limit of liability and the maximum potential annual payments are adjusted at least every five years for inflation to reflect changes in the Consumer Price Index. The five-year inflationary adjustment as prescribed by the most recent Price-Anderson Act renewal was effective October 29, 2008. Owners of a nuclear reactor cover this exposure through a combination of private insurance and mandatory participation in a financial protection pool, as established by Price-Anderson.

Losses resulting from terrorist attacks are covered under Nuclear Electric Insurance Ltd.'s policies, subject to an industrywide aggregate policy limit of $3.24 billion within a 12-month period for coverage for such terrorist acts.

If losses from a nuclear incident at the Callaway energy center exceed the limits of, or are not covered by, insurance, or if coverage is unavailable, Ameren Missouri is at risk for any uninsured losses. If a serious nuclear incident were to occur, it could have a material adverse effect on Ameren's and Ameren Missouri's results of operations, financial position, or liquidity.

Leases

We lease various facilities, office equipment, plant equipment, and rail cars under operating leases. The following table presents our lease obligations at December 31, 2011:

 

      Total      2012      2013      2014      2015      2016      After 5 Years  

Ameren:(a)

                    

Capital lease payments(b)

   $ 621       $ 33       $ 32       $ 32       $ 33       $ 33       $ 458   

Less amount representing interest

     312         28         27         27         27         27         176   

Present value of minimum capital lease payments

   $ 309       $ 5       $ 5       $ 5       $ 6       $ 6       $ 282   

Operating leases(c)

     307         38         32         26         26         25         160   

Total lease obligations

   $ 616       $ 43       $ 37       $ 31       $ 32       $ 31       $ 442   

Ameren Missouri:

                    

Capital lease payments(b)

   $ 621       $ 33       $ 32       $ 32       $ 33       $ 33       $ 458   

Less amount representing interest

     312         28         27         27         27         27         176   

Present value of minimum capital lease payments

   $ 309       $ 5       $ 5       $ 5       $ 6       $ 6       $ 282   

Operating leases(c)

     134         13         12         12         12         12         73   

Total lease obligations

   $ 443       $ 18       $ 17       $ 17       $ 18       $ 18       $ 355   

Ameren Illinois:

                    

Operating leases(c)

   $ 7       $ 1       $ 1       $ 1       $ 1       $ 1       $ 2   

Genco:

                    

Operating leases(c)

   $ 131       $ 11       $ 11       $ 11       $ 10       $ 11       $ 77   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) See Properties under Part I, Item 2, and Note 3 – Property and Plant, Net of this report for additional information.
(c) Amounts related to certain real estate leases and railroad licenses have indefinite payment periods. Ameren's $2 million annual obligation for these items is included in the 2012 through 2016 columns. The amounts for the indefinite payments are not included in the After 5 Years column because that period is indefinite.

The following table presents total rental expense, included in operating expenses, for the years ended December 31, 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 47       $ 52       $     50   

Ameren Missouri

     29         29         30   

Ameren Illinois

     17         19         19   

Genco

     12         13         15   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

Other Obligations

To supply a portion of the fuel requirements of our generating plants, we have entered into various long-term commitments for the procurement of coal, natural gas, nuclear fuel, and methane gas. We also have entered into various long-term commitments for purchased power and natural gas for distribution. The table below presents our estimated fuel, purchased power, and other commitments at December 31, 2011. Ameren's and Ameren Missouri's coal commitments include multiyear agreements to procure ultra-low-sulfur coal and related transportation from the Powder River Basin in Wyoming. Ameren's and Ameren Missouri's purchased power obligations include a 102-MW power purchase agreement with a wind farm operator that expires in 2024. Ameren's and Ameren Illinois' purchased power obligations include the Ameren Illinois power purchase agreements entered into as part of the IPA-administered power procurement process. Included in the Other column are minimum purchase commitments under contracts for equipment, design and construction, meter reading services, and an Ameren tax credit obligation at December 31, 2011. Ameren's tax credit obligation is a $17 million note payable issued for an investment in a commercial real estate development partnership to acquire tax credits. This note payable was netted against the related investment in "Other assets" on Ameren's balance sheet at December 31, 2011, as Ameren has a legally enforceable right to offset under authoritative accounting guidance.

 

          Coal        Natural
Gas
       Nuclear
Fuel
       Purchased
Power
       Methane
Gas
              Other      Total  

Ameren:(a)

                              

2012

     $ 1,120         $ 398         $ 36         $ 196         $ 1       $ 221       $ 1,972   

2013

       792           295           37           309           3         80         1,516   

2014

       692           220           96           125           3         75         1,211   

2015

       687           116           90           51           3         52         999   

2016

       674           39           100           52           3         62         930   

Thereafter

       968           134           298           746           94         246         2,486   

Total

     $ 4,933         $ 1,202         $ 657         $ 1,479         $ 107       $ 736       $ 9,114   

Ameren Missouri:

                              

2012

     $ 623         $ 63         $ 36         $ 19         $ 1       $ 78       $ 820   

2013

       605           48           37           19           3         50         762   

2014

       625           36           96           19           3         47         826   

2015

       614           19           90           19           3         28         773   

2016

       644           7           100           19           3         38         811   

Thereafter

       921           30           298           155           94         144         1,642   

Total

     $   4,032         $ 203         $ 657         $ 250         $ 107       $ 385       $   5,634   

Ameren Illinois:

                              

2012

     $ -         $ 324         $ -         $ 177         $ -       $ 24       $ 525   

2013

       -           243           -           290           -         22         555   

2014

       -           180           -           106           -         22         308   

2015

       -           94           -           32           -         24         150   

2016

       -           31           -           33           -         24         88   

Thereafter

       -           105           -           591           -         102         798   

Total

     $ -         $ 977         $ -         $ 1,229         $ -       $ 218       $ 2,424   

Genco:

                              

2012

     $ 355         $ 9         $ -         $ -         $ -       $ 98       $ 462   

2013

       108           4           -           -           -         5         117   

2014

       40           3           -           -           -         5         48   

2015

       45           2           -           -           -         -         47   

2016

       -           -           -           -           -         -         -   

Thereafter

       -           -           -           -           -         -         -   

Total

     $ 548         $ 18         $ -         $ -         $ -       $ 108       $ 674   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

Also, as part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company to lock in energy prices for 400 to 1,000 megawatts annually of their round-the-clock power requirements from 2008 to 2012. These commitments are not reflected in the above table. See Note 7 – Derivative Financial Instruments and Note 14 – Related Party Transactions for additional information.

In February 2012, a rate stability procurement for energy products and renewable energy credits was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Ameren Illinois contracted to purchase approximately 13 million megawatthours of energy products at an average price of approximately $31 per megawatthour. Ameren Illinois is currently reviewing the results of the renewable energy credits procurement proceeding.

Ameren Illinois has entered into an agreement to purchase approximately 15.5 billion cubic feet of synthetic natural gas annually over a 10-year period beginning in 2016 for its natural gas customers. The agreement is contingent on the counterparty reaching certain milestones during the project development and the construction of the plant that will produce the synthetic natural gas. Construction has not begun on the plant; therefore, Ameren Illinois' obligations are not yet certain at this time. The agreement was entered into pursuant to an Illinois law which became effective August 2, 2011, and provides that all contract costs for synthetic natural gas incurred by Ameren Illinois are reasonable and prudent and recoverable through the PGA and are not subject to review or disallowance by the ICC.

Environmental Matters

We are subject to various environmental laws and regulations enforced by federal, state, and local authorities. From the beginning phases of siting and development to the ongoing operation of existing or new electric generating, transmission and distribution facilities, natural gas storage, transmission and distribution facilities, our activities involve compliance with diverse environmental laws and regulations. These laws and regulations address emissions, impacts to air, land and water, noise, protected natural and cultural resources (such as wetlands, endangered species and other protected wildlife, and archeological and historical resources), and chemical and waste handling. Complex and lengthy processes are required to obtain approvals, permits, or licenses for new, existing or modified facilities. Additionally, the use and handling of various chemicals or hazardous materials (including wastes) requires release prevention plans and emergency response procedures.

In addition to existing laws and regulations, including the Illinois MPS that applies to our energy centers in Illinois, the EPA is developing numerous new environmental regulations that will have a significant impact on the electric utility industry. These regulations could be particularly burdensome for certain companies, including Ameren, Ameren Missouri and Genco, that operate coal-fired energy centers. Significant new rules proposed or promulgated since the beginning of 2010 include the regulation of greenhouse gas emissions; revised national ambient air quality standards for SO2 and NO2 emissions; the CSAPR, which requires further reductions of SO2 and NOx emissions from power plants; a regulation governing management of CCR and coal ash impoundments; the MATS, which requires reduction of emissions of mercury, toxic metals, and acid gases from power plants; revised NSPS for particulate matter, SO2, and NOx emissions from new sources; and new regulations under the Clean Water Act that could require significant capital expenditures such as new water intake structures or cooling towers at our energy centers. The EPA also plans to propose an additional rule, applicable to new and existing electric generating units, governing NSPS and emission guidelines for greenhouse gas emissions. These new regulations may be litigated, so the timing of their implementation is uncertain, as evidenced by the stay of the CSAPR by the United States Court of Appeals for the District of Columbia on December 30, 2011. Although many details of these future regulations are unknown, the combined effects of the new and proposed environmental regulations may result in significant capital expenditures and/or increased operating costs over the next five to ten years for Ameren, Ameren Missouri and Genco. Actions required to ensure that our facilities and operations are in compliance with environmental laws and regulations could be prohibitively expensive. If they are, these regulations could require us to close or to significantly alter the operation of our energy centers, which could have an adverse effect on our results of operations, financial position, and liquidity, including the impairment of plant assets. Failure to comply with environmental laws and regulations might also result in the imposition of fines, penalties, and injunctive measures.

The estimates in the table below contain all of the known capital costs to comply with existing environmental regulations and our assessment of the potential impacts of the EPA's proposed regulation for CCR, the recently finalized MATS, the stayed CSAPR as currently designed, and the revised national ambient air quality standards for SO2 and NOx emissions as of December 31, 2011. The estimates in the table below assume that CCR will continue to be regarded as nonhazardous. The estimates in the table below do not include the impacts of new regulations proposed by the EPA under the Clean Water Act in March 2011 regarding cooling water intake structures as our evaluation of those impacts is ongoing. The estimates shown in the table below could change significantly depending upon a variety of factors including:

 

Ÿ  

additional federal or state requirements;

Ÿ  

regulation of greenhouse gas emissions;

Ÿ  

new national ambient air quality standards or changes to existing standards for ozone, fine particulates, SO2, and NOx emissions;

Ÿ  

additional rules governing air pollutant transport;

Ÿ  

finalized regulations under the Clean Water Act;

Ÿ  

CCR being classified as hazardous;

Ÿ  

whether the CSAPR is implemented and whether any modifications are made to its existing requirements;

Ÿ  

new technology;

Ÿ  

expected power prices;

Ÿ  

variations in costs of material or labor; and

Ÿ  

alternative compliance strategies or investment decisions.

 

     2012     2013 - 2016     2017 - 2021     Total  

AMO(a)

  $ 55      $ 325 -      $ 400      $ 845 -      $ 1,030      $ 1,225 -      $ 1,485   

Genco

    150        100 -        125        245 -        295        495 -        570   

AERG

    5        20 -        25        80 -        100        105 -        130   

Ameren

  $  210      $  445 -     $  550      $  1,170 -      $  1,425      $  1,825 -       $  2,185   

 

(a) Ameren Missouri's expenditures are expected to be recoverable from ratepayers.

 

The decision to make pollution control equipment investments at our Merchant Generation business depends on whether the expected future market price for power reflects the increased cost for environmental compliance. In early 2012, there has been a decline in the market price for wholesale power because of factors such as declining natural gas prices and the stay of the CSAPR. As a result of this decline in the market price for power, as well as uncertain environmental regulations, Genco is decelerating the construction of two scrubbers at of its Newton energy center. These scrubbers were originally expected to be installed in late 2013 and spring 2014. The ultimate installation of these scrubbers, now estimated to occur between 2017 and 2021 in the table above, has been postponed until such time as the incremental investment necessary for completion is justified by visible market conditions. However, Genco will continue to incur capital costs related to the construction of these scrubbers. The table above includes Genco's estimated costs of approximately $150 million in 2012 and approximately $20 million annually, excluding capitalized interest, from 2013 through 2016 for the construction of the two scrubbers. In addition to Genco's reduction in estimated capital expenditures, AERG is deferring precipitator upgrades at its E.D. Edwards energy center beyond 2016.

The following sections describe the more significant environmental rules that affect our operations.

Clean Air Act

Both federal and state laws require significant reductions in SO2 and NOx emissions that result from burning fossil fuels. In March 2005, the EPA issued regulations with respect to SO2 and NOx emissions (the CAIR). The CAIR required generating facilities in 28 states, including Missouri and Illinois, and the District of Columbia to participate in cap-and-trade programs to reduce annual SO2 emissions, annual NOx emissions, and ozone season NOx emissions.

In December 2008, the United States Court of Appeals for the District of Columbia remanded the CAIR to the EPA for further action to remedy the rule's flaws, but allowed the CAIR's cap-and-trade programs to remain effective until they are replaced by the EPA. In July 2011, the EPA issued the CSAPR as the CAIR replacement. The CSAPR was to become effective on January 1, 2012, for SO2 and annual NOx reductions and on May 1, 2012, for ozone season NOx reductions. In the CSAPR, the EPA developed federal implementation plans for each state covered by this rule; however, each impacted state can develop its own implementation rule starting as early as 2013. The CSAPR establishes emission allowance budgets for each of the states subject to the regulation, including Missouri and Illinois. With the CSAPR, the EPA abandoned CAIR's regional approach to cutting emissions and instead set a pollution budget for each of the impacted states based on the EPA's analysis of each upwind state's contribution to air quality in downwind states. For Missouri and Illinois, emission reductions were required in two phases beginning in 2012, with further reductions in 2014. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, in the SO2 program, in the annual NOx, or in ozone season NOx program. Multiple legal challenges were filed requesting to have CSAPR partially or entirely vacated and to stay the implementation of the CSAPR while the court considers the challenges. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. The stay does not invalidate the rule, but only delays its implementation until a final court ruling is issued. The United States Court of Appeals for the District of Columbia has expedited its consideration of the regulation and will hear arguments on the validity of CSAPR in April 2012. The ultimate outcome of the challenges to the regulation is uncertain. The court could uphold CSAPR or remand it back to the EPA for partial or entire revision. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR.

On December 21, 2011, the EPA issued the final MATS under the Clean Air Act, which require emission reductions for mercury and other hazardous air pollutants, such as acid gases, toxic metals, and particulate matter by setting emission limits equal to the average emissions of the best performing 12% of existing coal and oil-fired electric generating units. Also, the rule requires reductions in hydrogen chloride emissions, which were not regulated previously, and it may require continuous monitoring systems that are not currently in place. The MATS do not require a specific control technology to achieve the emission reductions. The MATS will apply to each unit at a coal-fired power plant; however, emission compliance can be averaged for the entire power plant. Compliance is required by April 2015 or, with a case-by-case extension, by April 2016.

Separately, in January and June 2010, the EPA finalized new ambient air quality standards for SO2 and NO2. It also announced plans for further reductions in the annual national ambient air quality standards for ozone and fine particulates. The state of Illinois and the state of Missouri will be required to develop separate attainment plans to comply with the new ambient air quality standards. Ameren, Ameren Missouri and Genco continue to assess the impacts of these new standards. In September 2011, the EPA withdrew its draft annual national ambient air quality standard for ozone and announced that it was implementing the 2008 national ambient air quality standard for ozone. The EPA is required to revisit this standard again in 2013.

Ameren Missouri's current environmental compliance plan for air emissions from its energy centers includes burning ultra-low-sulfur coal and installing new or optimizing existing pollution control equipment. In July 2011, Ameren Missouri contracted to procure significantly higher volumes of lower-sulfur-content coal than Ameren Missouri's energy centers have historically burned, which will allow Ameren Missouri to eliminate or postpone capital expenditures for pollution control equipment while still achieving required emissions levels. In 2010, Ameren Missouri completed the installation of two scrubbers at its Sioux energy center to reduce SO2 emissions. Currently, Ameren Missouri's compliance plan assumes the installation of two scrubbers within its coal-fired fleet during the next 10 years and precipitator upgrades at multiple energy centers. However, Ameren Missouri is currently evaluating its operations and options to determine how to comply with the additional emission reductions requirements in 2014 set forth in the CSAPR, if ultimately enacted, the MATS, and other recently finalized or proposed EPA regulations.

Existing Illinois state regulations already required Ameren and Genco to reduce their emissions of mercury under the MPS. Ameren's and Genco's review of the MATS indicates that the scope of the federal standards is broader than the MPS, as no exemption exists for smaller coal-fired plants. Additionally, the MATS are more stringent than the MPS because compliance with the MATS is measured on a quarterly basis and, in some cases, a thirty-day rolling basis and not annually, as allowed under state requirements. At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers was primarily due to the expected cost of complying with CSAPR and MATS. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Genco and AERG expect to install additional, or optimize existing, pollution control equipment, or modify operations to meet new and incremental emission reduction requirements under the MPS, the MATS, or the CSAPR as they become effective. Under the MPS, as amended, Illinois generators are required to reduce mercury, SO2, and NOx emissions by 2015. To comply with the MPS and other air emissions laws and regulations, Genco and AERG are installing equipment designed to reduce their emissions of mercury, NOx, and SO2. Genco and AERG have installed a total of three scrubbers at two energy centers. Two additional scrubbers are being constructed at Genco's Newton energy center. As discussed above, the timing of the installation of these scrubbers as well as precipitator upgrades at AERG's E.D. Edwards energy center have been extended. The closure of Genco's Meredosia and Hutsonville energy centers will allow the Merchant Generation segment additional flexibility in the methods to achieve compliance with environmental standards. Merchant Generation and Genco will continue to review and adjust their compliance plans in light of evolving outlooks for power and capacity prices, delivered fuel costs, environment standards and compliance technologies, among other factors.

The completion of Ameren's, Ameren Missouri's and Genco's review of recently finalized environmental regulations and compliance measures could result in significant increases in capital expenditures and operating costs. The compliance costs could be prohibitive at some of our energy centers as the expected return from these investments, at current market prices for energy and capacity, might not justify the required capital expenditures or their continued operation, which could result in the impairment of long-lived assets.

 

Emission Allowances

The Clean Air Act created marketable commodities called allowances under the acid rain program, the NOx budget trading program, the CAIR, and the CSAPR. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, either the SO2, annual NOx, or ozone season NOx programs. As noted above, on December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR including its allowance program. See Note 1 – Summary of Significant Accounting Policies for the SO2 and NOx emission allowance book values that were classified as intangible assets as of December 31, 2011 and 2010, and Note 17 – Goodwill, Impairment and Other Charges for information regarding the emission allowance impairments recorded during 2011 and 2010.

Environmental regulations including the CAIR and the CSAPR, the timing of the installation of pollution control equipment, fuel mix, and the level of operations, will have a significant impact on the number of allowances required for ongoing operations. The CAIR uses the acid rain program's allowances for SO2 emissions and created annual and ozone season NOx allowances. The CSAPR, however, will not rely upon the acid rain program, the NOx budget trading program, or CAIR allowances for its allowance allocation program. Instead, the EPA issued a new type of emissions allowance for each program under the CSAPR. Any unused SO2 allowances, annual NOx allowances, and ozone season NOx allowances issued under CAIR cannot be used for compliance with CSAPR. Ameren, Ameren Missouri and Genco expect to have adequate CAIR allowances for 2012 to avoid needing to make external purchases.

Should the CSAPR become effective as issued, Ameren, Ameren Missouri and Genco are studying their compliance options to identify additional opportunities that may exist for compliance in an economical fashion. Ameren, Ameren Missouri and Genco may be required to purchase emission allowances, if available, to install new or optimize existing pollution control equipment, to limit generation, or take other actions to achieve compliance with the CSAPR in future phase-in years.

Global Climate Change

State and federal authorities, including the United States Congress, have considered initiatives to limit greenhouse gas emissions and to address global climate change. Potential impacts from any climate change legislation or regulation could vary, depending upon proposed CO2 emission limits, the timing of implementation of those limits, the method of distributing any allowances, the degree to which offsets are allowed and available, and provisions for cost-containment measures, such as a "safety valve" provision that provides a maximum price for emission allowances. As a result of our diverse fuel portfolio, our emissions of greenhouse gases vary among our energy centers, but coal-fired power plants are significant sources of CO2. The enactment of a climate change law could result in a significant rise in household costs and rates for electricity could rise significantly. The burden could fall particularly hard on electricity consumers and upon the economy in the Midwest because of the region's reliance on electricity generated by coal-fired power plants. Natural gas emits about half as much CO2 as coal when burned to produce electricity. Therefore, climate change regulation could cause the conversion of coal-fired power plants to natural gas, or the construction of new natural gas plants to replace coal-fired power plants. As a result, economywide shifts to natural gas as a fuel source for electricity generation also could affect the cost of heating for our utility customers and many industrial processes that use natural gas.

In December 2009, the EPA issued its "endangerment finding" under the Clean Air Act which stated that greenhouse gas emissions, including CO2, endanger human health and welfare and that emissions of greenhouse gases from motor vehicles contribute to that endangerment. In March 2010, the EPA issued a determination that greenhouse gas emissions from stationary sources, such as power plants, would be subject to regulation under the Clean Air Act effective the beginning of 2011. As a result of these actions, we are required to consider the emissions of greenhouse gases in any air permit application.

Recognizing the difficulties presented by regulating at once virtually all emitters of greenhouse gases, the EPA finalized in May 2010 regulations, known as the "Tailoring Rule," that established new higher thresholds for regulating greenhouse gas emissions from stationary sources, such as power plants. The Tailoring Rule became effective in January 2011. The rule requires any source that already has an operating permit to have greenhouse-gas-specific provisions added to its permits upon renewal. Currently, all Ameren energy centers have operating permits that, when renewed, may be modified to address greenhouse gas emissions. The Tailoring Rule also provides that if projects performed at major sources result in an increase in emissions of greenhouse gases of at least 75,000 tons per year, measured in CO2 equivalents, such projects could trigger permitting requirements under the NSR programs and the application of best available control technology, if any, to control greenhouse gas emissions. New major sources are also required to obtain such a permit and to install the best available control technology if their greenhouse gas emissions exceed the applicable emissions threshold. Separately, in December 2010, the EPA announced a settlement agreement under which it would propose NSPS for greenhouse gas emissions at new and existing fossil fuel-fired power plants by July 26, 2011 and issue a final standard by May 2012. The EPA has not yet proposed a rule and has not specified a new estimate of when it will issue that standard. It is uncertain whether reductions to greenhouse gas emissions would be required at Ameren's, Ameren Missouri's or Genco's energy centers as a result of any of the EPA's new and future rules. Legal challenges to the EPA's greenhouse gas rules have been filed. Any federal climate change legislation that is enacted may preempt the EPA's regulation of greenhouse gas emissions, including the Tailoring Rule, particularly as it relates to power plant greenhouse gas emissions. The extent to which the Tailoring Rule could have a material impact on our energy centers depends upon how state agencies apply the EPA's guidelines as to what constitutes the best available control technology for greenhouse gas emissions from power plants and whether physical changes or changes in operations subject to the rule occur at our energy centers. Although the EPA has stated its intention to regulate greenhouse gas emissions from stationary sources, such as power plants, congressional action could block or delay that effort.

Future federal and state legislation or regulations that mandate limits on the emission of greenhouse gases would likely result in significant increases in capital expenditures and operating costs, which, in turn, could lead to increased liquidity needs and higher financing costs. Moreover, to the extent Ameren Missouri requests recovery of these costs through rates, its regulators might delay or deny timely recovery of these costs. Excessive costs to comply with future legislation or regulations might force Ameren, Ameren Missouri and Genco as well as other similarly situated electric power generators to close some coal-fired facilities earlier than planned, which could lead to possible impairment of assets and reduced revenues. As a result, mandatory limits could have a material adverse impact on Ameren's, Ameren Missouri's, and Genco's results of operations, financial position, and liquidity.

Recent federal court decisions have considered the application of common law causes of action, such as nuisance, to address damages resulting from global climate change. In June 2011, the United States Supreme Court in State of Connecticut v. American Electric Power rejected state efforts to impose liability for CO2 and greenhouse gases emissions under federal common law. That ruling, however, did not address whether private citizens could pursue causes of action based on state common law. In June 2011, a case called Comer v. Murphy Oil (Comer) was filed in the United States District Court for the Southern District of Mississippi. In this litigation, a Mississippi property owner sued several industrial companies, including Ameren Missouri and Genco, alleging that CO2 emissions created the atmospheric conditions that intensified Hurricane Katrina. Although we are unable to predict the outcome of the Comer litigation on our results of operations, financial position, and liquidity, Ameren believes that it has meritorious defenses. Numerous procedural and substantive challenges are expected in the Comer litigation.

The impact on us of future initiatives related to greenhouse gas emissions and global climate change is unknown. Compliance costs could increase as future federal legislative, federal regulatory, and state-sponsored initiatives to control greenhouse gases continue to progress, making it more likely that some form of greenhouse gas emissions control will eventually be required. Since these initiatives continue to evolve, the impact on our coal-fired energy centers and our customers' costs is unknown, but any impact would probably be negative. Our costs of complying with any mandated federal or state greenhouse gas program could have a material impact on our future results of operations, financial position, and liquidity.

NSR and Clean Air Litigation

The EPA is engaged in an enforcement initiative to determine whether coal-fired power plants failed to comply with the requirements of the NSR and NSPS provisions under the Clean Air Act when the plants implemented modifications. The EPA's inquiries focus on whether projects performed at power plants should have triggered various permitting requirements and the installation of pollution control equipment.

In April 2005, Genco received a request from the EPA for information pursuant to Section 114(a) of the Clean Air Act. The request sought detailed operating and maintenance history data with respect to Genco's Coffeen, Hutsonville, Meredosia, Newton, and Joppa energy centers and AERG's E.D. Edwards and Duck Creek energy centers. In 2006, the EPA issued a second Section 114(a) request to Genco regarding projects at the Newton energy center. All of these facilities are coal-fired energy centers. In September 2008, the EPA issued a third Section 114(a) request regarding projects at all of Ameren's coal-fired energy centers in Illinois. We completed our response to the information requests, but we are unable to predict the outcome of this matter.

Following the issuance of a Notice of Violation, in January 2011, the Department of Justice on behalf of the EPA filed a complaint against Ameren Missouri in the United States District Court for the Eastern District of Missouri. The EPA's complaint alleges that in performing projects at its Rush Island coal-fired energy center, Ameren Missouri violated provisions of the Clean Air Act and Missouri law. In January 2012, the United States District Court granted, in part, Ameren Missouri's motion to dismiss various aspects of the EPA's penalty claims. The EPA's claims for injunctive relief, including to require the installation of pollution control equipment, remain. At present, the complaint does not include Ameren Missouri's other coal-fired energy centers, but the EPA has issued Notices of Violation under its NSR enforcement initiative against the company's Labadie, Meramec, and Sioux coal-fired energy centers. Litigation of this matter could take many years to resolve. Ameren Missouri believes its defenses to the allegations described in the complaint as well as the Notices of Violation are meritorious. Ameren Missouri will defend itself vigorously. However, there can be no assurances that it will be successful in its efforts.

Ultimate resolution of these matters could have a material adverse impact on the future results of operations, financial position, and liquidity of Ameren, Ameren Missouri and Genco. A resolution could result in increased capital expenditures for the installation of pollution control equipment, increased operations and maintenance expenses, and penalties. We are unable to predict the ultimate resolution of these matters or the costs that might be incurred. However, Ameren Missouri has concluded that, while a loss may be reasonably possible, the likelihood of loss is not probable. Therefore, no reserve has been established.

Clean Water Act

In March 2011, the EPA announced a proposed rule applicable to cooling water intake structures at existing power plants that have the ability to withdraw more than 2 million gallons of water per day from a body of water and use at least 25 percent of that water exclusively for cooling. Under the proposed rule, affected facilities would be required either to meet mortality limits for aquatic life impinged on the plant's intake screens or to reduce intake velocity to 0.5 feet per second. The proposed rule also requires plants to meet site-specific entrainment standards or to reduce the cooling water intake flow commensurate with the intake flow of a closed-cycle cooling system. The final rule is scheduled to be issued in July 2012, with compliance expected within eight years thereafter. All coal-fired, nuclear, and combined cycle energy centers at Ameren, Ameren Missouri and Genco with cooling water systems are subject to this proposed rule. The proposed rule did not mandate cooling towers at existing facilities, as other technology options potentially could meet the site-specific standards. Ameren, Ameren Missouri and Genco are currently evaluating the proposed rule, and their assessment of the proposed rule's impacts is ongoing. Therefore, we cannot predict at this time the capital or operating costs associated with compliance. The proposed rule could have an adverse effect on our results of operations, financial position, and liquidity if its implementation requires the installation of cooling towers at our electric generating stations.

In September 2009, the EPA announced its plan to revise the effluent guidelines applicable to steam electric generating units under the Clean Water Act. Effluent guidelines are national standards for wastewater discharges to surface water that are based on the effectiveness of available control technology. The EPA is engaged in information collection and analysis activities in support of this rulemaking. It has indicated that it expects to issue a proposed rule in July 2012 and to finalize the rule in 2014. We are unable at this time to predict the impact of this development.

Remediation

We are involved in a number of remediation actions to clean up hazardous waste sites as required by federal and state law. Such statutes require that responsible parties fund remediation actions regardless of their degree of fault, the legality of original disposal, or the ownership of a disposal site. Ameren Missouri and Ameren Illinois have each been identified by the federal or state governments as a potentially responsible party (PRP) at several contaminated sites. Several of these sites involve facilities that were transferred by our rate-regulated utility operations in Illinois to Genco in May 2000 and to AERG in October 2003. As part of each transfer, Ameren Illinois contractually agreed to indemnify Genco and AERG for remediation costs associated with preexisting environmental contamination at the transferred sites.

As of December 31, 2011, Ameren and Ameren Illinois owned or were otherwise responsible for 44 former MGP sites in Illinois. These are in various stages of investigation, evaluation, and remediation. Based on current estimated plans, Ameren and Ameren Illinois could substantially conclude remediation efforts at most of these sites by 2015. The ICC permits Ameren Illinois to recover remediation and litigation costs associated with its former MGP sites from its electric and natural gas utility customers through environmental adjustment rate riders. To be recoverable, such costs must be prudently and properly incurred. Costs are subject to annual review by the ICC.

As of December 31, 2011, Ameren and Ameren Missouri own or are otherwise responsible for 10 MGP sites in Missouri and one site in Iowa. Ameren Missouri does not currently have a rate rider mechanism that permits recovery of remediation costs associated with MGP sites from utility customers. Ameren Missouri does not have any retail utility operations in Iowa that would provide a source of recovery of these remediation costs.

The following table presents, as of December 31, 2011, the estimated probable obligation to remediate these MGP sites.

 

      Estimate     

Recorded
Liability(a)

 
      Low      High     

Ameren

   $     107       $     183       $     107   

Ameren Missouri

     3         4         3   

Ameren Illinois

     104         179         104   

 

(a) Recorded liability represents the estimated minimum probable obligations, as no other amount within the range provided a better estimate.

Ameren Illinois is responsible for the cleanup of a former coal ash landfill in Coffeen, Illinois. As of December 31, 2011, Ameren Illinois estimated that obligation at $0.5 million to $6 million. Ameren Illinois recorded a liability of $0.5 million to represent its estimated minimum obligation for this site, as no other amount within the range was a better estimate. Ameren Illinois is also responsible for the cleanup of a landfill, underground storage tanks, and a water treatment plant in Illinois. As of December 31, 2011, Ameren Illinois recorded a liability of $0.8 million to represent its best estimate of the obligation for these sites.

Ameren Missouri has responsibility for the investigation and potential cleanup of two waste sites in Missouri as a result of federal agency mandates. One of the cleanup sites is a former coal tar distillery located in St. Louis, Missouri. In 2008, the EPA issued an administrative order to Ameren Missouri pertaining to this distillery operated by Koppers Company or its predecessor and successor companies. Ameren Missouri is the current owner of the site, but Ameren Missouri did not conduct any of the manufacturing operations involving coal tar or its byproducts. Ameren Missouri, along with two other PRPs, is currently performing a site investigation. As of December 31, 2011, Ameren Missouri estimated its obligation at $2 million to $5 million. Ameren Missouri has a liability of $2 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate. Ameren Missouri's other active federal agency-mandated cleanup site in Missouri is a site in Cape Girardeau. Ameren Missouri was a customer of an electrical equipment repair and disposal company that previously operated a facility at this site. A trust was established in the early 1990s by several businesses and governmental agencies to fund the cleanup of this site, which was completed in 2005. Ameren Missouri anticipates this trust fund will be sufficient to complete the remaining adjacent off-site cleanup and therefore has no recorded liability at December 31, 2011, related to this site.

Ameren Missouri also has a federal agency mandate to complete a site investigation for a site in Illinois. In 2000, the EPA notified Ameren Missouri and numerous other companies, including Solutia, that former landfills and lagoons in Sauget, Illinois, may contain soil and groundwater contamination. These sites are known as Sauget Area 2. From about 1926 until 1976, Ameren Missouri operated an energy center adjacent to Sauget Area 2. Ameren Missouri currently owns a parcel of property that was once used as a landfill. Under the terms of an Administrative Order on Consent, Ameren Missouri has joined with other PRPs to evaluate the extent of potential contamination with respect to Sauget Area 2.

The Sauget Area 2 investigations overseen by the EPA have been completed. The results have been submitted to the EPA, and a record of decision is expected in 2012. Once the EPA has selected a remedy, if any, it would begin negotiations with various PRPs regarding implementation. Over the last several years, numerous other parties have joined the PRP group. In addition, Pharmacia Corporation and Monsanto Company have agreed to assume the liabilities related to Solutia's former chemical waste landfill in the Sauget Area 2. As of December 31, 2011, Ameren Missouri estimated its obligation at $0.3 million to $10 million. Ameren Missouri has a liability of $0.3 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate.

In December 2004, AERG submitted a plan to the Illinois EPA to address groundwater and surface water issues associated with the recycle pond, ash ponds, and reservoir at the Duck Creek energy center. In 2010, AERG closed the recycle pond system. Remediation work on the recycle pond was completed in the first quarter of 2011, and therefore no liability exists as of December 31, 2011.

Our operations or those of our predecessor companies involve the use of, disposal of, and in appropriate circumstances, the cleanup of substances regulated under environmental protection laws. We are unable to determine whether such practices will result in future environmental commitments or affect our results of operations, financial position, or liquidity.

Ash Management

There has been activity at both state and federal levels regarding additional regulation of ash pond facilities and CCR. In May 2010, the EPA announced proposed new regulations regarding the regulatory framework for the management and disposal of CCR, which could affect future disposal and handling costs at our energy centers. Those proposed regulations include two options for managing CCRs under either solid or hazardous waste regulations, but either alternative would allow for some continued beneficial uses, such as recycling of CCR without classifying it as waste. As part of its proposal, the EPA is considering alternative regulatory approaches that require coal-fired power plants either to close surface impoundments, such as ash ponds, or to retrofit such facilities with liners. Existing impoundments and landfills used for the disposal of CCR would be subject to groundwater monitoring requirements and requirements related to closure and postclosure care under the proposed regulations. Additionally, in January 2010, EPA announced its intent to develop regulations establishing financial responsibility requirements for the electric generation industry, among other industries, and it specifically discussed CCR as a reason for developing the new requirements. Ameren, Ameren Missouri and Genco are currently evaluating all of the proposed regulations to determine whether current management of CCR, including beneficial reuse, and the use of the ash ponds should be altered. Ameren, Ameren Missouri and Genco also are evaluating the potential costs associated with compliance with the proposed regulation of CCR impoundments and landfills, which could be material, if such regulations are adopted.

In addition, the Illinois EPA requested that Ameren, Ameren Missouri and Genco establish groundwater monitoring plans for their ash impoundments in Illinois. Ameren and the Illinois EPA have established a framework for closure of ash ponds in Illinois, including the ash ponds at Venice, Hutsonville, and Duck Creek, when such facilities are ultimately taken out of service. Ameren, Ameren Missouri and Genco have recorded AROs, based on current laws, for the estimated costs of the retirement of their ash ponds.

Pumped-storage Hydroelectric Facility Breach

In December 2005, there was a breach of the upper reservoir at Ameren Missouri's Taum Sauk pumped-storage hydroelectric energy center. This resulted in significant flooding in the local area, which damaged a state park. Ameren Missouri settled with FERC and the state of Missouri all issues associated with the December 2005 Taum Sauk incident. The rebuilt Taum Sauk energy center became fully operational in April 2010.

 

Ameren Missouri included certain capitalized costs associated with enhancements, or costs that would have been incurred absent the breach, at the rebuilt Taum Sauk energy center not recovered from property insurers in its 2010 electric rate case filing. However, in the July 2011 rate order, the MoPSC disallowed all of these capitalized costs associated with the rebuilding of the Taum Sauk energy center. As a result of the order, Ameren and Ameren Missouri each recorded a pretax charge to earnings in 2011 of $89 million to reflect this disallowance. See Note 2 – Rate and Regulatory Matters for additional information about the appeal of the MoPSC's July 2011 electric rate order.

Ameren Missouri had property and liability insurance coverage for the Taum Sauk incident, subject to certain limits and deductibles. Insurance did not cover some lost electric margins or penalties paid to FERC. Ameren Missouri believes that the total cost for cleanup, damage and liabilities, excluding costs to rebuild the upper reservoir, is $209 million, which is the amount Ameren Missouri had paid as of December 31, 2011. As of December 31, 2011, Ameren Missouri had recorded expenses of $37 million, primarily in prior years (2011 – $1 million, 2010 – $1 million, 2009 – $2 million), for items not covered by insurance. Ameren Missouri recorded a $172 million receivable for amounts recoverable from insurance companies under liability coverage. As of December 31, 2011, Ameren Missouri had received $104 million from insurance companies for liability claims, which reduced the insurance receivable balance subject to liability coverage to $68 million.

In June 2010, Ameren Missouri sued an insurance company that was providing Ameren Missouri with liability coverage on the date of the Taum Sauk incident. In the litigation, filed in the United States District Court for the Eastern District of Missouri, Ameren Missouri claimed the insurance company breached its duty to indemnify Ameren Missouri for the losses experienced from the incident. In January 2011, the court ruled that the parties must first pursue alternative dispute resolution under the terms of their coverage agreement. In February 2011, Ameren Missouri filed an appeal of the January ruling with the United States Court of Appeals for the Eighth Circuit, seeking the ability to pursue resolution of this dispute outside of a dispute resolution process under the terms of its coverage agreement.

Until Ameren's remaining liability insurance claims and the related litigation are resolved, we are unable to determine the total impact the breach could have on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity beyond those amounts already recognized.

Asbestos-related Litigation

Ameren, Ameren Missouri, Ameren Illinois and EEI have been named, along with numerous other parties, in a number of lawsuits filed by plaintiffs claiming varying degrees of injury from asbestos exposure. Most have been filed in the Circuit Court of Madison County, Illinois. The total number of defendants named in each case varies, with as many as 272 parties named in some pending cases and as few as two in others. In the cases pending as of December 31, 2011, the average number of parties was 80.

The claims filed against Ameren, Ameren Missouri, Ameren Illinois and Genco allege injury from asbestos exposure during the plaintiffs' activities at our present or former electric generating plants. Former CIPS plants are now owned by Genco, and former CILCO plants are now owned by AERG. As a part of the transfer of ownership of the CIPS and CILCO generating plants, CIPS and CILCO, now Ameren Illinois, contractually agreed to indemnify Genco and AERG, for liabilities associated with asbestos-related claims arising from activities prior to the transfer. Each lawsuit seeks unspecified damages that, if awarded at trial, typically would be shared among the various defendants.

The following table presents the pending asbestos-related lawsuits filed against the Ameren Companies as of December 31, 2011:

 

Ameren  

Ameren

Missouri

 

Ameren

Illinois

  Genco   Total(a)

4

  53   77   (b)   93

 

(a) Total does not equal the sum of the subsidiary unit lawsuits because some of the lawsuits name multiple Ameren entities as defendants.
(b) As of December 31, 2011, six asbestos-related lawsuits were pending against EEI. The general liability insurance maintained by EEI provides coverage with respect to liabilities arising from asbestos-related claims.

At December 31, 2011, Ameren, Ameren Missouri, Ameren Illinois and Genco had liabilities of $18 million, $6 million, $12 million, and $- million, respectively, recorded to represent their best estimate of their obligations related to asbestos claims.

Ameren Illinois has a tariff rider to recover the costs of asbestos-related litigation claims, subject to the following terms: 90% of cash expenditures in excess of the amount included in base electric rates are to be recovered from a trust fund that was established when Ameren acquired IP. At December 31, 2011, the trust fund balance was $23 million, including accumulated interest. If cash expenditures are less than the amount in base rates, Ameren Illinois will contribute 90% of the difference to the fund. Once the trust fund is depleted, 90% of allowed cash expenditures in excess of base rates will be recovered through charges assessed to customers under the tariff rider. Following the Ameren Illinois Merger, this rider is applicable only for claims that occurred within IP's historical service territory. Similarly, the rider will permit recovery only from customers within IP's historical service territory.

Illinois Sales and Use Tax Exemptions and Credits

In Exelon Corporation v. Department of Revenue, the Illinois Supreme Court decided in 2009 that electricity is tangible personal property for purposes of the Illinois income tax investment credit. In March 2010, the United States Supreme Court refused to hear the case, and the decision became final. During the second quarter of 2010, Genco and AERG began claiming Illinois sales and use tax exemptions and credits for purchase transactions related to their generation operations. The basis for those claims is that the determination in the Exelon case that electricity is tangible personal property applies to sales and use tax manufacturing exemptions and credits. On November 2, 2011, EEI received a notice of proposed tax liability, documenting the state of Illinois' position that EEI did not qualify for the manufacturing exemption it used during 2010. Genco is challenging the State of Illinois' position. In December 2011, EEI filed a request for review by the Informal Conference Board of the Illinois Department of Revenue. Ameren and Genco do not believe that it is probable that the state of Illinois will prevail and therefore have not recorded a charge to earnings for the loss contingency. From the second quarter of 2010 through December 31, 2011, Ameren and Genco claimed manufacturing exemptions and credits of $27 million and $19 million, respectively.

NOTE 15 – COMMITMENTS AND CONTINGENCIES

We are involved in legal, tax and regulatory proceedings before various courts, regulatory commissions, and governmental agencies with respect to matters that arise in the ordinary course of business, some of which involve substantial amounts of money. We believe that the final disposition of these proceedings, except as otherwise disclosed in these notes to our financial statements, will not have a material adverse effect on our results of operations, financial position, or liquidity.

See also Note 1 – Summary of Significant Accounting Policies, Note 2 – Rate and Regulatory Matters, Note 10 – Callaway Energy Center and Note 14 – Related Party Transactions in this report.

Callaway Energy Center

The following table presents insurance coverage at Ameren Missouri's Callaway energy center at December 31, 2011. The property coverage and the nuclear liability coverage must be renewed on April 1 and January 1, respectively, of each year.

 

Type and Source of Coverage    Maximum Coverages     Maximum Assessments for Single Incidents  

Public liability and nuclear worker liability:

    

American Nuclear Insurers

   $ 375        $        -   

Pool participation

     12,219 (a)      118 (b) 
   $     12,594 (c)      $   118   

Property damage:

    

Nuclear Electric Insurance Ltd.

   $ 2,750 (d)      $     23   

Replacement power:

    

Nuclear Electric Insurance Ltd

   $ 490 (e)      $       9   

Energy Risk Assurance Company

   $ 64 (f)      $        -   

 

(a) Provided through mandatory participation in an industrywide retrospective premium assessment program.
(b) Retrospective premium under Price-Anderson. This is subject to retrospective assessment with respect to a covered loss in excess of $375 million in the event of an incident at any licensed U.S. commercial reactor, payable at $17.5 million per year.
(c) Limit of liability for each incident under the Price-Anderson liability provisions of the Atomic Energy Act of 1954, as amended. A company could be assessed up to $118 million per incident for each licensed reactor it operates with a maximum of $17.5 million per incident to be paid in a calendar year for each reactor. This limit is subject to change to account for the effects of inflation and changes in the number of licensed reactors.
(d) Provides for $500 million in property damage and decontamination, excess property insurance, and premature decommissioning coverage up to $2.25 billion for losses in excess of the $500 million primary coverage.
(e) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. Weekly indemnity up to $4.5 million for 52 weeks, which commences after the first eight weeks of an outage, plus up to $3.6 million per week for a minimum of 71 weeks thereafter for a total not exceeding the policy limit of $490 million.
(f) Provides the replacement power cost insurance in the event of a prolonged accidental outage at our nuclear energy center. The coverage commences after the first 52 weeks of insurance coverage from Nuclear Electric Insurance Ltd. and is for a weekly indemnity of $900,000 for 71 weeks in excess of the $3.6 million per week set forth above. Energy Risk Assurance Company is an affiliate and has reinsured this coverage with third-party insurance companies. See Note 14 – Related Party Transactions for more information on this affiliate transaction.

The Price-Anderson Act is a federal law that limits the liability for claims from an incident involving any licensed United States commercial nuclear power facility. The limit is based on the number of licensed reactors. The limit of liability and the maximum potential annual payments are adjusted at least every five years for inflation to reflect changes in the Consumer Price Index. The five-year inflationary adjustment as prescribed by the most recent Price-Anderson Act renewal was effective October 29, 2008. Owners of a nuclear reactor cover this exposure through a combination of private insurance and mandatory participation in a financial protection pool, as established by Price-Anderson.

Losses resulting from terrorist attacks are covered under Nuclear Electric Insurance Ltd.'s policies, subject to an industrywide aggregate policy limit of $3.24 billion within a 12-month period for coverage for such terrorist acts.

If losses from a nuclear incident at the Callaway energy center exceed the limits of, or are not covered by, insurance, or if coverage is unavailable, Ameren Missouri is at risk for any uninsured losses. If a serious nuclear incident were to occur, it could have a material adverse effect on Ameren's and Ameren Missouri's results of operations, financial position, or liquidity.

Leases

We lease various facilities, office equipment, plant equipment, and rail cars under operating leases. The following table presents our lease obligations at December 31, 2011:

 

      Total      2012      2013      2014      2015      2016      After 5 Years  

Ameren:(a)

                    

Capital lease payments(b)

   $ 621       $ 33       $ 32       $ 32       $ 33       $ 33       $ 458   

Less amount representing interest

     312         28         27         27         27         27         176   

Present value of minimum capital lease payments

   $ 309       $ 5       $ 5       $ 5       $ 6       $ 6       $ 282   

Operating leases(c)

     307         38         32         26         26         25         160   

Total lease obligations

   $ 616       $ 43       $ 37       $ 31       $ 32       $ 31       $ 442   

Ameren Missouri:

                    

Capital lease payments(b)

   $ 621       $ 33       $ 32       $ 32       $ 33       $ 33       $ 458   

Less amount representing interest

     312         28         27         27         27         27         176   

Present value of minimum capital lease payments

   $ 309       $ 5       $ 5       $ 5       $ 6       $ 6       $ 282   

Operating leases(c)

     134         13         12         12         12         12         73   

Total lease obligations

   $ 443       $ 18       $ 17       $ 17       $ 18       $ 18       $ 355   

Ameren Illinois:

                    

Operating leases(c)

   $ 7       $ 1       $ 1       $ 1       $ 1       $ 1       $ 2   

Genco:

                    

Operating leases(c)

   $ 131       $ 11       $ 11       $ 11       $ 10       $ 11       $ 77   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) See Properties under Part I, Item 2, and Note 3 – Property and Plant, Net of this report for additional information.
(c) Amounts related to certain real estate leases and railroad licenses have indefinite payment periods. Ameren's $2 million annual obligation for these items is included in the 2012 through 2016 columns. The amounts for the indefinite payments are not included in the After 5 Years column because that period is indefinite.

The following table presents total rental expense, included in operating expenses, for the years ended December 31, 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren(a)

   $ 47       $ 52       $     50   

Ameren Missouri

     29         29         30   

Ameren Illinois

     17         19         19   

Genco

     12         13         15   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

Other Obligations

To supply a portion of the fuel requirements of our generating plants, we have entered into various long-term commitments for the procurement of coal, natural gas, nuclear fuel, and methane gas. We also have entered into various long-term commitments for purchased power and natural gas for distribution. The table below presents our estimated fuel, purchased power, and other commitments at December 31, 2011. Ameren's and Ameren Missouri's coal commitments include multiyear agreements to procure ultra-low-sulfur coal and related transportation from the Powder River Basin in Wyoming. Ameren's and Ameren Missouri's purchased power obligations include a 102-MW power purchase agreement with a wind farm operator that expires in 2024. Ameren's and Ameren Illinois' purchased power obligations include the Ameren Illinois power purchase agreements entered into as part of the IPA-administered power procurement process. Included in the Other column are minimum purchase commitments under contracts for equipment, design and construction, meter reading services, and an Ameren tax credit obligation at December 31, 2011. Ameren's tax credit obligation is a $17 million note payable issued for an investment in a commercial real estate development partnership to acquire tax credits. This note payable was netted against the related investment in "Other assets" on Ameren's balance sheet at December 31, 2011, as Ameren has a legally enforceable right to offset under authoritative accounting guidance.

 

          Coal        Natural
Gas
       Nuclear
Fuel
       Purchased
Power
       Methane
Gas
              Other      Total  

Ameren:(a)

                              

2012

     $ 1,120         $ 398         $ 36         $ 196         $ 1       $ 221       $ 1,972   

2013

       792           295           37           309           3         80         1,516   

2014

       692           220           96           125           3         75         1,211   

2015

       687           116           90           51           3         52         999   

2016

       674           39           100           52           3         62         930   

Thereafter

       968           134           298           746           94         246         2,486   

Total

     $ 4,933         $ 1,202         $ 657         $ 1,479         $ 107       $ 736       $ 9,114   

Ameren Missouri:

                              

2012

     $ 623         $ 63         $ 36         $ 19         $ 1       $ 78       $ 820   

2013

       605           48           37           19           3         50         762   

2014

       625           36           96           19           3         47         826   

2015

       614           19           90           19           3         28         773   

2016

       644           7           100           19           3         38         811   

Thereafter

       921           30           298           155           94         144         1,642   

Total

     $   4,032         $ 203         $ 657         $ 250         $ 107       $ 385       $   5,634   

Ameren Illinois:

                              

2012

     $ -         $ 324         $ -         $ 177         $ -       $ 24       $ 525   

2013

       -           243           -           290           -         22         555   

2014

       -           180           -           106           -         22         308   

2015

       -           94           -           32           -         24         150   

2016

       -           31           -           33           -         24         88   

Thereafter

       -           105           -           591           -         102         798   

Total

     $ -         $ 977         $ -         $ 1,229         $ -       $ 218       $ 2,424   

Genco:

                              

2012

     $ 355         $ 9         $ -         $ -         $ -       $ 98       $ 462   

2013

       108           4           -           -           -         5         117   

2014

       40           3           -           -           -         5         48   

2015

       45           2           -           -           -         -         47   

2016

       -           -           -           -           -         -         -   

Thereafter

       -           -           -           -           -         -         -   

Total

     $ 548         $ 18         $ -         $ -         $ -       $ 108       $ 674   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

Also, as part of the 2007 Illinois Electric Settlement Agreement, Ameren Illinois entered into financial contracts with Marketing Company to lock in energy prices for 400 to 1,000 megawatts annually of their round-the-clock power requirements from 2008 to 2012. These commitments are not reflected in the above table. See Note 7 – Derivative Financial Instruments and Note 14 – Related Party Transactions for additional information.

In February 2012, a rate stability procurement for energy products and renewable energy credits was administered by the IPA for the June 2013 through May 2017 period to meet certain requirements for purchased power related to the IEIMA. Ameren Illinois contracted to purchase approximately 13 million megawatthours of energy products at an average price of approximately $31 per megawatthour. Ameren Illinois is currently reviewing the results of the renewable energy credits procurement proceeding.

Ameren Illinois has entered into an agreement to purchase approximately 15.5 billion cubic feet of synthetic natural gas annually over a 10-year period beginning in 2016 for its natural gas customers. The agreement is contingent on the counterparty reaching certain milestones during the project development and the construction of the plant that will produce the synthetic natural gas. Construction has not begun on the plant; therefore, Ameren Illinois' obligations are not yet certain at this time. The agreement was entered into pursuant to an Illinois law which became effective August 2, 2011, and provides that all contract costs for synthetic natural gas incurred by Ameren Illinois are reasonable and prudent and recoverable through the PGA and are not subject to review or disallowance by the ICC.

Environmental Matters

We are subject to various environmental laws and regulations enforced by federal, state, and local authorities. From the beginning phases of siting and development to the ongoing operation of existing or new electric generating, transmission and distribution facilities, natural gas storage, transmission and distribution facilities, our activities involve compliance with diverse environmental laws and regulations. These laws and regulations address emissions, impacts to air, land and water, noise, protected natural and cultural resources (such as wetlands, endangered species and other protected wildlife, and archeological and historical resources), and chemical and waste handling. Complex and lengthy processes are required to obtain approvals, permits, or licenses for new, existing or modified facilities. Additionally, the use and handling of various chemicals or hazardous materials (including wastes) requires release prevention plans and emergency response procedures.

In addition to existing laws and regulations, including the Illinois MPS that applies to our energy centers in Illinois, the EPA is developing numerous new environmental regulations that will have a significant impact on the electric utility industry. These regulations could be particularly burdensome for certain companies, including Ameren, Ameren Missouri and Genco, that operate coal-fired energy centers. Significant new rules proposed or promulgated since the beginning of 2010 include the regulation of greenhouse gas emissions; revised national ambient air quality standards for SO2 and NO2 emissions; the CSAPR, which requires further reductions of SO2 and NOx emissions from power plants; a regulation governing management of CCR and coal ash impoundments; the MATS, which requires reduction of emissions of mercury, toxic metals, and acid gases from power plants; revised NSPS for particulate matter, SO2, and NOx emissions from new sources; and new regulations under the Clean Water Act that could require significant capital expenditures such as new water intake structures or cooling towers at our energy centers. The EPA also plans to propose an additional rule, applicable to new and existing electric generating units, governing NSPS and emission guidelines for greenhouse gas emissions. These new regulations may be litigated, so the timing of their implementation is uncertain, as evidenced by the stay of the CSAPR by the United States Court of Appeals for the District of Columbia on December 30, 2011. Although many details of these future regulations are unknown, the combined effects of the new and proposed environmental regulations may result in significant capital expenditures and/or increased operating costs over the next five to ten years for Ameren, Ameren Missouri and Genco. Actions required to ensure that our facilities and operations are in compliance with environmental laws and regulations could be prohibitively expensive. If they are, these regulations could require us to close or to significantly alter the operation of our energy centers, which could have an adverse effect on our results of operations, financial position, and liquidity, including the impairment of plant assets. Failure to comply with environmental laws and regulations might also result in the imposition of fines, penalties, and injunctive measures.

The estimates in the table below contain all of the known capital costs to comply with existing environmental regulations and our assessment of the potential impacts of the EPA's proposed regulation for CCR, the recently finalized MATS, the stayed CSAPR as currently designed, and the revised national ambient air quality standards for SO2 and NOx emissions as of December 31, 2011. The estimates in the table below assume that CCR will continue to be regarded as nonhazardous. The estimates in the table below do not include the impacts of new regulations proposed by the EPA under the Clean Water Act in March 2011 regarding cooling water intake structures as our evaluation of those impacts is ongoing. The estimates shown in the table below could change significantly depending upon a variety of factors including:

 

Ÿ  

additional federal or state requirements;

Ÿ  

regulation of greenhouse gas emissions;

Ÿ  

new national ambient air quality standards or changes to existing standards for ozone, fine particulates, SO2, and NOx emissions;

Ÿ  

additional rules governing air pollutant transport;

Ÿ  

finalized regulations under the Clean Water Act;

Ÿ  

CCR being classified as hazardous;

Ÿ  

whether the CSAPR is implemented and whether any modifications are made to its existing requirements;

Ÿ  

new technology;

Ÿ  

expected power prices;

Ÿ  

variations in costs of material or labor; and

Ÿ  

alternative compliance strategies or investment decisions.

 

     2012     2013 - 2016     2017 - 2021     Total  

AMO(a)

  $ 55      $ 325 -      $ 400      $ 845 -      $ 1,030      $ 1,225 -      $ 1,485   

Genco

    150        100 -        125        245 -        295        495 -        570   

AERG

    5        20 -        25        80 -        100        105 -        130   

Ameren

  $  210      $  445 -     $  550      $  1,170 -      $  1,425      $  1,825 -       $  2,185   

 

(a) Ameren Missouri's expenditures are expected to be recoverable from ratepayers.

 

The decision to make pollution control equipment investments at our Merchant Generation business depends on whether the expected future market price for power reflects the increased cost for environmental compliance. In early 2012, there has been a decline in the market price for wholesale power because of factors such as declining natural gas prices and the stay of the CSAPR. As a result of this decline in the market price for power, as well as uncertain environmental regulations, Genco is decelerating the construction of two scrubbers at of its Newton energy center. These scrubbers were originally expected to be installed in late 2013 and spring 2014. The ultimate installation of these scrubbers, now estimated to occur between 2017 and 2021 in the table above, has been postponed until such time as the incremental investment necessary for completion is justified by visible market conditions. However, Genco will continue to incur capital costs related to the construction of these scrubbers. The table above includes Genco's estimated costs of approximately $150 million in 2012 and approximately $20 million annually, excluding capitalized interest, from 2013 through 2016 for the construction of the two scrubbers. In addition to Genco's reduction in estimated capital expenditures, AERG is deferring precipitator upgrades at its E.D. Edwards energy center beyond 2016.

The following sections describe the more significant environmental rules that affect our operations.

Clean Air Act

Both federal and state laws require significant reductions in SO2 and NOx emissions that result from burning fossil fuels. In March 2005, the EPA issued regulations with respect to SO2 and NOx emissions (the CAIR). The CAIR required generating facilities in 28 states, including Missouri and Illinois, and the District of Columbia to participate in cap-and-trade programs to reduce annual SO2 emissions, annual NOx emissions, and ozone season NOx emissions.

In December 2008, the United States Court of Appeals for the District of Columbia remanded the CAIR to the EPA for further action to remedy the rule's flaws, but allowed the CAIR's cap-and-trade programs to remain effective until they are replaced by the EPA. In July 2011, the EPA issued the CSAPR as the CAIR replacement. The CSAPR was to become effective on January 1, 2012, for SO2 and annual NOx reductions and on May 1, 2012, for ozone season NOx reductions. In the CSAPR, the EPA developed federal implementation plans for each state covered by this rule; however, each impacted state can develop its own implementation rule starting as early as 2013. The CSAPR establishes emission allowance budgets for each of the states subject to the regulation, including Missouri and Illinois. With the CSAPR, the EPA abandoned CAIR's regional approach to cutting emissions and instead set a pollution budget for each of the impacted states based on the EPA's analysis of each upwind state's contribution to air quality in downwind states. For Missouri and Illinois, emission reductions were required in two phases beginning in 2012, with further reductions in 2014. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, in the SO2 program, in the annual NOx, or in ozone season NOx program. Multiple legal challenges were filed requesting to have CSAPR partially or entirely vacated and to stay the implementation of the CSAPR while the court considers the challenges. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. The stay does not invalidate the rule, but only delays its implementation until a final court ruling is issued. The United States Court of Appeals for the District of Columbia has expedited its consideration of the regulation and will hear arguments on the validity of CSAPR in April 2012. The ultimate outcome of the challenges to the regulation is uncertain. The court could uphold CSAPR or remand it back to the EPA for partial or entire revision. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR.

On December 21, 2011, the EPA issued the final MATS under the Clean Air Act, which require emission reductions for mercury and other hazardous air pollutants, such as acid gases, toxic metals, and particulate matter by setting emission limits equal to the average emissions of the best performing 12% of existing coal and oil-fired electric generating units. Also, the rule requires reductions in hydrogen chloride emissions, which were not regulated previously, and it may require continuous monitoring systems that are not currently in place. The MATS do not require a specific control technology to achieve the emission reductions. The MATS will apply to each unit at a coal-fired power plant; however, emission compliance can be averaged for the entire power plant. Compliance is required by April 2015 or, with a case-by-case extension, by April 2016.

Separately, in January and June 2010, the EPA finalized new ambient air quality standards for SO2 and NO2. It also announced plans for further reductions in the annual national ambient air quality standards for ozone and fine particulates. The state of Illinois and the state of Missouri will be required to develop separate attainment plans to comply with the new ambient air quality standards. Ameren, Ameren Missouri and Genco continue to assess the impacts of these new standards. In September 2011, the EPA withdrew its draft annual national ambient air quality standard for ozone and announced that it was implementing the 2008 national ambient air quality standard for ozone. The EPA is required to revisit this standard again in 2013.

Ameren Missouri's current environmental compliance plan for air emissions from its energy centers includes burning ultra-low-sulfur coal and installing new or optimizing existing pollution control equipment. In July 2011, Ameren Missouri contracted to procure significantly higher volumes of lower-sulfur-content coal than Ameren Missouri's energy centers have historically burned, which will allow Ameren Missouri to eliminate or postpone capital expenditures for pollution control equipment while still achieving required emissions levels. In 2010, Ameren Missouri completed the installation of two scrubbers at its Sioux energy center to reduce SO2 emissions. Currently, Ameren Missouri's compliance plan assumes the installation of two scrubbers within its coal-fired fleet during the next 10 years and precipitator upgrades at multiple energy centers. However, Ameren Missouri is currently evaluating its operations and options to determine how to comply with the additional emission reductions requirements in 2014 set forth in the CSAPR, if ultimately enacted, the MATS, and other recently finalized or proposed EPA regulations.

Existing Illinois state regulations already required Ameren and Genco to reduce their emissions of mercury under the MPS. Ameren's and Genco's review of the MATS indicates that the scope of the federal standards is broader than the MPS, as no exemption exists for smaller coal-fired plants. Additionally, the MATS are more stringent than the MPS because compliance with the MATS is measured on a quarterly basis and, in some cases, a thirty-day rolling basis and not annually, as allowed under state requirements. At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers was primarily due to the expected cost of complying with CSAPR and MATS. See Note 17 – Goodwill, Impairment and Other Charges for additional information.

Genco and AERG expect to install additional, or optimize existing, pollution control equipment, or modify operations to meet new and incremental emission reduction requirements under the MPS, the MATS, or the CSAPR as they become effective. Under the MPS, as amended, Illinois generators are required to reduce mercury, SO2, and NOx emissions by 2015. To comply with the MPS and other air emissions laws and regulations, Genco and AERG are installing equipment designed to reduce their emissions of mercury, NOx, and SO2. Genco and AERG have installed a total of three scrubbers at two energy centers. Two additional scrubbers are being constructed at Genco's Newton energy center. As discussed above, the timing of the installation of these scrubbers as well as precipitator upgrades at AERG's E.D. Edwards energy center have been extended. The closure of Genco's Meredosia and Hutsonville energy centers will allow the Merchant Generation segment additional flexibility in the methods to achieve compliance with environmental standards. Merchant Generation and Genco will continue to review and adjust their compliance plans in light of evolving outlooks for power and capacity prices, delivered fuel costs, environment standards and compliance technologies, among other factors.

The completion of Ameren's, Ameren Missouri's and Genco's review of recently finalized environmental regulations and compliance measures could result in significant increases in capital expenditures and operating costs. The compliance costs could be prohibitive at some of our energy centers as the expected return from these investments, at current market prices for energy and capacity, might not justify the required capital expenditures or their continued operation, which could result in the impairment of long-lived assets.

 

Emission Allowances

The Clean Air Act created marketable commodities called allowances under the acid rain program, the NOx budget trading program, the CAIR, and the CSAPR. With the CSAPR, the EPA adopted a cap-and-trade approach that allows intrastate and limited interstate trading of emission allowances with other sources within the same program, that is, either the SO2, annual NOx, or ozone season NOx programs. As noted above, on December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until the CSAPR appeal process is concluded, the EPA will continue to administer the CAIR including its allowance program. See Note 1 – Summary of Significant Accounting Policies for the SO2 and NOx emission allowance book values that were classified as intangible assets as of December 31, 2011 and 2010, and Note 17 – Goodwill, Impairment and Other Charges for information regarding the emission allowance impairments recorded during 2011 and 2010.

Environmental regulations including the CAIR and the CSAPR, the timing of the installation of pollution control equipment, fuel mix, and the level of operations, will have a significant impact on the number of allowances required for ongoing operations. The CAIR uses the acid rain program's allowances for SO2 emissions and created annual and ozone season NOx allowances. The CSAPR, however, will not rely upon the acid rain program, the NOx budget trading program, or CAIR allowances for its allowance allocation program. Instead, the EPA issued a new type of emissions allowance for each program under the CSAPR. Any unused SO2 allowances, annual NOx allowances, and ozone season NOx allowances issued under CAIR cannot be used for compliance with CSAPR. Ameren, Ameren Missouri and Genco expect to have adequate CAIR allowances for 2012 to avoid needing to make external purchases.

Should the CSAPR become effective as issued, Ameren, Ameren Missouri and Genco are studying their compliance options to identify additional opportunities that may exist for compliance in an economical fashion. Ameren, Ameren Missouri and Genco may be required to purchase emission allowances, if available, to install new or optimize existing pollution control equipment, to limit generation, or take other actions to achieve compliance with the CSAPR in future phase-in years.

Global Climate Change

State and federal authorities, including the United States Congress, have considered initiatives to limit greenhouse gas emissions and to address global climate change. Potential impacts from any climate change legislation or regulation could vary, depending upon proposed CO2 emission limits, the timing of implementation of those limits, the method of distributing any allowances, the degree to which offsets are allowed and available, and provisions for cost-containment measures, such as a "safety valve" provision that provides a maximum price for emission allowances. As a result of our diverse fuel portfolio, our emissions of greenhouse gases vary among our energy centers, but coal-fired power plants are significant sources of CO2. The enactment of a climate change law could result in a significant rise in household costs and rates for electricity could rise significantly. The burden could fall particularly hard on electricity consumers and upon the economy in the Midwest because of the region's reliance on electricity generated by coal-fired power plants. Natural gas emits about half as much CO2 as coal when burned to produce electricity. Therefore, climate change regulation could cause the conversion of coal-fired power plants to natural gas, or the construction of new natural gas plants to replace coal-fired power plants. As a result, economywide shifts to natural gas as a fuel source for electricity generation also could affect the cost of heating for our utility customers and many industrial processes that use natural gas.

In December 2009, the EPA issued its "endangerment finding" under the Clean Air Act which stated that greenhouse gas emissions, including CO2, endanger human health and welfare and that emissions of greenhouse gases from motor vehicles contribute to that endangerment. In March 2010, the EPA issued a determination that greenhouse gas emissions from stationary sources, such as power plants, would be subject to regulation under the Clean Air Act effective the beginning of 2011. As a result of these actions, we are required to consider the emissions of greenhouse gases in any air permit application.

Recognizing the difficulties presented by regulating at once virtually all emitters of greenhouse gases, the EPA finalized in May 2010 regulations, known as the "Tailoring Rule," that established new higher thresholds for regulating greenhouse gas emissions from stationary sources, such as power plants. The Tailoring Rule became effective in January 2011. The rule requires any source that already has an operating permit to have greenhouse-gas-specific provisions added to its permits upon renewal. Currently, all Ameren energy centers have operating permits that, when renewed, may be modified to address greenhouse gas emissions. The Tailoring Rule also provides that if projects performed at major sources result in an increase in emissions of greenhouse gases of at least 75,000 tons per year, measured in CO2 equivalents, such projects could trigger permitting requirements under the NSR programs and the application of best available control technology, if any, to control greenhouse gas emissions. New major sources are also required to obtain such a permit and to install the best available control technology if their greenhouse gas emissions exceed the applicable emissions threshold. Separately, in December 2010, the EPA announced a settlement agreement under which it would propose NSPS for greenhouse gas emissions at new and existing fossil fuel-fired power plants by July 26, 2011 and issue a final standard by May 2012. The EPA has not yet proposed a rule and has not specified a new estimate of when it will issue that standard. It is uncertain whether reductions to greenhouse gas emissions would be required at Ameren's, Ameren Missouri's or Genco's energy centers as a result of any of the EPA's new and future rules. Legal challenges to the EPA's greenhouse gas rules have been filed. Any federal climate change legislation that is enacted may preempt the EPA's regulation of greenhouse gas emissions, including the Tailoring Rule, particularly as it relates to power plant greenhouse gas emissions. The extent to which the Tailoring Rule could have a material impact on our energy centers depends upon how state agencies apply the EPA's guidelines as to what constitutes the best available control technology for greenhouse gas emissions from power plants and whether physical changes or changes in operations subject to the rule occur at our energy centers. Although the EPA has stated its intention to regulate greenhouse gas emissions from stationary sources, such as power plants, congressional action could block or delay that effort.

Future federal and state legislation or regulations that mandate limits on the emission of greenhouse gases would likely result in significant increases in capital expenditures and operating costs, which, in turn, could lead to increased liquidity needs and higher financing costs. Moreover, to the extent Ameren Missouri requests recovery of these costs through rates, its regulators might delay or deny timely recovery of these costs. Excessive costs to comply with future legislation or regulations might force Ameren, Ameren Missouri and Genco as well as other similarly situated electric power generators to close some coal-fired facilities earlier than planned, which could lead to possible impairment of assets and reduced revenues. As a result, mandatory limits could have a material adverse impact on Ameren's, Ameren Missouri's, and Genco's results of operations, financial position, and liquidity.

Recent federal court decisions have considered the application of common law causes of action, such as nuisance, to address damages resulting from global climate change. In June 2011, the United States Supreme Court in State of Connecticut v. American Electric Power rejected state efforts to impose liability for CO2 and greenhouse gases emissions under federal common law. That ruling, however, did not address whether private citizens could pursue causes of action based on state common law. In June 2011, a case called Comer v. Murphy Oil (Comer) was filed in the United States District Court for the Southern District of Mississippi. In this litigation, a Mississippi property owner sued several industrial companies, including Ameren Missouri and Genco, alleging that CO2 emissions created the atmospheric conditions that intensified Hurricane Katrina. Although we are unable to predict the outcome of the Comer litigation on our results of operations, financial position, and liquidity, Ameren believes that it has meritorious defenses. Numerous procedural and substantive challenges are expected in the Comer litigation.

The impact on us of future initiatives related to greenhouse gas emissions and global climate change is unknown. Compliance costs could increase as future federal legislative, federal regulatory, and state-sponsored initiatives to control greenhouse gases continue to progress, making it more likely that some form of greenhouse gas emissions control will eventually be required. Since these initiatives continue to evolve, the impact on our coal-fired energy centers and our customers' costs is unknown, but any impact would probably be negative. Our costs of complying with any mandated federal or state greenhouse gas program could have a material impact on our future results of operations, financial position, and liquidity.

NSR and Clean Air Litigation

The EPA is engaged in an enforcement initiative to determine whether coal-fired power plants failed to comply with the requirements of the NSR and NSPS provisions under the Clean Air Act when the plants implemented modifications. The EPA's inquiries focus on whether projects performed at power plants should have triggered various permitting requirements and the installation of pollution control equipment.

In April 2005, Genco received a request from the EPA for information pursuant to Section 114(a) of the Clean Air Act. The request sought detailed operating and maintenance history data with respect to Genco's Coffeen, Hutsonville, Meredosia, Newton, and Joppa energy centers and AERG's E.D. Edwards and Duck Creek energy centers. In 2006, the EPA issued a second Section 114(a) request to Genco regarding projects at the Newton energy center. All of these facilities are coal-fired energy centers. In September 2008, the EPA issued a third Section 114(a) request regarding projects at all of Ameren's coal-fired energy centers in Illinois. We completed our response to the information requests, but we are unable to predict the outcome of this matter.

Following the issuance of a Notice of Violation, in January 2011, the Department of Justice on behalf of the EPA filed a complaint against Ameren Missouri in the United States District Court for the Eastern District of Missouri. The EPA's complaint alleges that in performing projects at its Rush Island coal-fired energy center, Ameren Missouri violated provisions of the Clean Air Act and Missouri law. In January 2012, the United States District Court granted, in part, Ameren Missouri's motion to dismiss various aspects of the EPA's penalty claims. The EPA's claims for injunctive relief, including to require the installation of pollution control equipment, remain. At present, the complaint does not include Ameren Missouri's other coal-fired energy centers, but the EPA has issued Notices of Violation under its NSR enforcement initiative against the company's Labadie, Meramec, and Sioux coal-fired energy centers. Litigation of this matter could take many years to resolve. Ameren Missouri believes its defenses to the allegations described in the complaint as well as the Notices of Violation are meritorious. Ameren Missouri will defend itself vigorously. However, there can be no assurances that it will be successful in its efforts.

Ultimate resolution of these matters could have a material adverse impact on the future results of operations, financial position, and liquidity of Ameren, Ameren Missouri and Genco. A resolution could result in increased capital expenditures for the installation of pollution control equipment, increased operations and maintenance expenses, and penalties. We are unable to predict the ultimate resolution of these matters or the costs that might be incurred. However, Ameren Missouri has concluded that, while a loss may be reasonably possible, the likelihood of loss is not probable. Therefore, no reserve has been established.

Clean Water Act

In March 2011, the EPA announced a proposed rule applicable to cooling water intake structures at existing power plants that have the ability to withdraw more than 2 million gallons of water per day from a body of water and use at least 25 percent of that water exclusively for cooling. Under the proposed rule, affected facilities would be required either to meet mortality limits for aquatic life impinged on the plant's intake screens or to reduce intake velocity to 0.5 feet per second. The proposed rule also requires plants to meet site-specific entrainment standards or to reduce the cooling water intake flow commensurate with the intake flow of a closed-cycle cooling system. The final rule is scheduled to be issued in July 2012, with compliance expected within eight years thereafter. All coal-fired, nuclear, and combined cycle energy centers at Ameren, Ameren Missouri and Genco with cooling water systems are subject to this proposed rule. The proposed rule did not mandate cooling towers at existing facilities, as other technology options potentially could meet the site-specific standards. Ameren, Ameren Missouri and Genco are currently evaluating the proposed rule, and their assessment of the proposed rule's impacts is ongoing. Therefore, we cannot predict at this time the capital or operating costs associated with compliance. The proposed rule could have an adverse effect on our results of operations, financial position, and liquidity if its implementation requires the installation of cooling towers at our electric generating stations.

In September 2009, the EPA announced its plan to revise the effluent guidelines applicable to steam electric generating units under the Clean Water Act. Effluent guidelines are national standards for wastewater discharges to surface water that are based on the effectiveness of available control technology. The EPA is engaged in information collection and analysis activities in support of this rulemaking. It has indicated that it expects to issue a proposed rule in July 2012 and to finalize the rule in 2014. We are unable at this time to predict the impact of this development.

Remediation

We are involved in a number of remediation actions to clean up hazardous waste sites as required by federal and state law. Such statutes require that responsible parties fund remediation actions regardless of their degree of fault, the legality of original disposal, or the ownership of a disposal site. Ameren Missouri and Ameren Illinois have each been identified by the federal or state governments as a potentially responsible party (PRP) at several contaminated sites. Several of these sites involve facilities that were transferred by our rate-regulated utility operations in Illinois to Genco in May 2000 and to AERG in October 2003. As part of each transfer, Ameren Illinois contractually agreed to indemnify Genco and AERG for remediation costs associated with preexisting environmental contamination at the transferred sites.

As of December 31, 2011, Ameren and Ameren Illinois owned or were otherwise responsible for 44 former MGP sites in Illinois. These are in various stages of investigation, evaluation, and remediation. Based on current estimated plans, Ameren and Ameren Illinois could substantially conclude remediation efforts at most of these sites by 2015. The ICC permits Ameren Illinois to recover remediation and litigation costs associated with its former MGP sites from its electric and natural gas utility customers through environmental adjustment rate riders. To be recoverable, such costs must be prudently and properly incurred. Costs are subject to annual review by the ICC.

As of December 31, 2011, Ameren and Ameren Missouri own or are otherwise responsible for 10 MGP sites in Missouri and one site in Iowa. Ameren Missouri does not currently have a rate rider mechanism that permits recovery of remediation costs associated with MGP sites from utility customers. Ameren Missouri does not have any retail utility operations in Iowa that would provide a source of recovery of these remediation costs.

The following table presents, as of December 31, 2011, the estimated probable obligation to remediate these MGP sites.

 

      Estimate     

Recorded
Liability(a)

 
      Low      High     

Ameren

   $     107       $     183       $     107   

Ameren Missouri

     3         4         3   

Ameren Illinois

     104         179         104   

 

(a) Recorded liability represents the estimated minimum probable obligations, as no other amount within the range provided a better estimate.

Ameren Illinois is responsible for the cleanup of a former coal ash landfill in Coffeen, Illinois. As of December 31, 2011, Ameren Illinois estimated that obligation at $0.5 million to $6 million. Ameren Illinois recorded a liability of $0.5 million to represent its estimated minimum obligation for this site, as no other amount within the range was a better estimate. Ameren Illinois is also responsible for the cleanup of a landfill, underground storage tanks, and a water treatment plant in Illinois. As of December 31, 2011, Ameren Illinois recorded a liability of $0.8 million to represent its best estimate of the obligation for these sites.

Ameren Missouri has responsibility for the investigation and potential cleanup of two waste sites in Missouri as a result of federal agency mandates. One of the cleanup sites is a former coal tar distillery located in St. Louis, Missouri. In 2008, the EPA issued an administrative order to Ameren Missouri pertaining to this distillery operated by Koppers Company or its predecessor and successor companies. Ameren Missouri is the current owner of the site, but Ameren Missouri did not conduct any of the manufacturing operations involving coal tar or its byproducts. Ameren Missouri, along with two other PRPs, is currently performing a site investigation. As of December 31, 2011, Ameren Missouri estimated its obligation at $2 million to $5 million. Ameren Missouri has a liability of $2 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate. Ameren Missouri's other active federal agency-mandated cleanup site in Missouri is a site in Cape Girardeau. Ameren Missouri was a customer of an electrical equipment repair and disposal company that previously operated a facility at this site. A trust was established in the early 1990s by several businesses and governmental agencies to fund the cleanup of this site, which was completed in 2005. Ameren Missouri anticipates this trust fund will be sufficient to complete the remaining adjacent off-site cleanup and therefore has no recorded liability at December 31, 2011, related to this site.

Ameren Missouri also has a federal agency mandate to complete a site investigation for a site in Illinois. In 2000, the EPA notified Ameren Missouri and numerous other companies, including Solutia, that former landfills and lagoons in Sauget, Illinois, may contain soil and groundwater contamination. These sites are known as Sauget Area 2. From about 1926 until 1976, Ameren Missouri operated an energy center adjacent to Sauget Area 2. Ameren Missouri currently owns a parcel of property that was once used as a landfill. Under the terms of an Administrative Order on Consent, Ameren Missouri has joined with other PRPs to evaluate the extent of potential contamination with respect to Sauget Area 2.

The Sauget Area 2 investigations overseen by the EPA have been completed. The results have been submitted to the EPA, and a record of decision is expected in 2012. Once the EPA has selected a remedy, if any, it would begin negotiations with various PRPs regarding implementation. Over the last several years, numerous other parties have joined the PRP group. In addition, Pharmacia Corporation and Monsanto Company have agreed to assume the liabilities related to Solutia's former chemical waste landfill in the Sauget Area 2. As of December 31, 2011, Ameren Missouri estimated its obligation at $0.3 million to $10 million. Ameren Missouri has a liability of $0.3 million recorded to represent its estimated minimum obligation, as no other amount within the range was a better estimate.

In December 2004, AERG submitted a plan to the Illinois EPA to address groundwater and surface water issues associated with the recycle pond, ash ponds, and reservoir at the Duck Creek energy center. In 2010, AERG closed the recycle pond system. Remediation work on the recycle pond was completed in the first quarter of 2011, and therefore no liability exists as of December 31, 2011.

Our operations or those of our predecessor companies involve the use of, disposal of, and in appropriate circumstances, the cleanup of substances regulated under environmental protection laws. We are unable to determine whether such practices will result in future environmental commitments or affect our results of operations, financial position, or liquidity.

Ash Management

There has been activity at both state and federal levels regarding additional regulation of ash pond facilities and CCR. In May 2010, the EPA announced proposed new regulations regarding the regulatory framework for the management and disposal of CCR, which could affect future disposal and handling costs at our energy centers. Those proposed regulations include two options for managing CCRs under either solid or hazardous waste regulations, but either alternative would allow for some continued beneficial uses, such as recycling of CCR without classifying it as waste. As part of its proposal, the EPA is considering alternative regulatory approaches that require coal-fired power plants either to close surface impoundments, such as ash ponds, or to retrofit such facilities with liners. Existing impoundments and landfills used for the disposal of CCR would be subject to groundwater monitoring requirements and requirements related to closure and postclosure care under the proposed regulations. Additionally, in January 2010, EPA announced its intent to develop regulations establishing financial responsibility requirements for the electric generation industry, among other industries, and it specifically discussed CCR as a reason for developing the new requirements. Ameren, Ameren Missouri and Genco are currently evaluating all of the proposed regulations to determine whether current management of CCR, including beneficial reuse, and the use of the ash ponds should be altered. Ameren, Ameren Missouri and Genco also are evaluating the potential costs associated with compliance with the proposed regulation of CCR impoundments and landfills, which could be material, if such regulations are adopted.

In addition, the Illinois EPA requested that Ameren, Ameren Missouri and Genco establish groundwater monitoring plans for their ash impoundments in Illinois. Ameren and the Illinois EPA have established a framework for closure of ash ponds in Illinois, including the ash ponds at Venice, Hutsonville, and Duck Creek, when such facilities are ultimately taken out of service. Ameren, Ameren Missouri and Genco have recorded AROs, based on current laws, for the estimated costs of the retirement of their ash ponds.

Pumped-storage Hydroelectric Facility Breach

In December 2005, there was a breach of the upper reservoir at Ameren Missouri's Taum Sauk pumped-storage hydroelectric energy center. This resulted in significant flooding in the local area, which damaged a state park. Ameren Missouri settled with FERC and the state of Missouri all issues associated with the December 2005 Taum Sauk incident. The rebuilt Taum Sauk energy center became fully operational in April 2010.

 

Ameren Missouri included certain capitalized costs associated with enhancements, or costs that would have been incurred absent the breach, at the rebuilt Taum Sauk energy center not recovered from property insurers in its 2010 electric rate case filing. However, in the July 2011 rate order, the MoPSC disallowed all of these capitalized costs associated with the rebuilding of the Taum Sauk energy center. As a result of the order, Ameren and Ameren Missouri each recorded a pretax charge to earnings in 2011 of $89 million to reflect this disallowance. See Note 2 – Rate and Regulatory Matters for additional information about the appeal of the MoPSC's July 2011 electric rate order.

Ameren Missouri had property and liability insurance coverage for the Taum Sauk incident, subject to certain limits and deductibles. Insurance did not cover some lost electric margins or penalties paid to FERC. Ameren Missouri believes that the total cost for cleanup, damage and liabilities, excluding costs to rebuild the upper reservoir, is $209 million, which is the amount Ameren Missouri had paid as of December 31, 2011. As of December 31, 2011, Ameren Missouri had recorded expenses of $37 million, primarily in prior years (2011 – $1 million, 2010 – $1 million, 2009 – $2 million), for items not covered by insurance. Ameren Missouri recorded a $172 million receivable for amounts recoverable from insurance companies under liability coverage. As of December 31, 2011, Ameren Missouri had received $104 million from insurance companies for liability claims, which reduced the insurance receivable balance subject to liability coverage to $68 million.

In June 2010, Ameren Missouri sued an insurance company that was providing Ameren Missouri with liability coverage on the date of the Taum Sauk incident. In the litigation, filed in the United States District Court for the Eastern District of Missouri, Ameren Missouri claimed the insurance company breached its duty to indemnify Ameren Missouri for the losses experienced from the incident. In January 2011, the court ruled that the parties must first pursue alternative dispute resolution under the terms of their coverage agreement. In February 2011, Ameren Missouri filed an appeal of the January ruling with the United States Court of Appeals for the Eighth Circuit, seeking the ability to pursue resolution of this dispute outside of a dispute resolution process under the terms of its coverage agreement.

Until Ameren's remaining liability insurance claims and the related litigation are resolved, we are unable to determine the total impact the breach could have on Ameren's and Ameren Missouri's results of operations, financial position, and liquidity beyond those amounts already recognized.

Asbestos-related Litigation

Ameren, Ameren Missouri, Ameren Illinois and EEI have been named, along with numerous other parties, in a number of lawsuits filed by plaintiffs claiming varying degrees of injury from asbestos exposure. Most have been filed in the Circuit Court of Madison County, Illinois. The total number of defendants named in each case varies, with as many as 272 parties named in some pending cases and as few as two in others. In the cases pending as of December 31, 2011, the average number of parties was 80.

The claims filed against Ameren, Ameren Missouri, Ameren Illinois and Genco allege injury from asbestos exposure during the plaintiffs' activities at our present or former electric generating plants. Former CIPS plants are now owned by Genco, and former CILCO plants are now owned by AERG. As a part of the transfer of ownership of the CIPS and CILCO generating plants, CIPS and CILCO, now Ameren Illinois, contractually agreed to indemnify Genco and AERG, for liabilities associated with asbestos-related claims arising from activities prior to the transfer. Each lawsuit seeks unspecified damages that, if awarded at trial, typically would be shared among the various defendants.

The following table presents the pending asbestos-related lawsuits filed against the Ameren Companies as of December 31, 2011:

 

Ameren  

Ameren

Missouri

 

Ameren

Illinois

  Genco   Total(a)

4

  53   77   (b)   93

 

(a) Total does not equal the sum of the subsidiary unit lawsuits because some of the lawsuits name multiple Ameren entities as defendants.
(b) As of December 31, 2011, six asbestos-related lawsuits were pending against EEI. The general liability insurance maintained by EEI provides coverage with respect to liabilities arising from asbestos-related claims.

At December 31, 2011, Ameren, Ameren Missouri, Ameren Illinois and Genco had liabilities of $18 million, $6 million, $12 million, and $- million, respectively, recorded to represent their best estimate of their obligations related to asbestos claims.

Ameren Illinois has a tariff rider to recover the costs of asbestos-related litigation claims, subject to the following terms: 90% of cash expenditures in excess of the amount included in base electric rates are to be recovered from a trust fund that was established when Ameren acquired IP. At December 31, 2011, the trust fund balance was $23 million, including accumulated interest. If cash expenditures are less than the amount in base rates, Ameren Illinois will contribute 90% of the difference to the fund. Once the trust fund is depleted, 90% of allowed cash expenditures in excess of base rates will be recovered through charges assessed to customers under the tariff rider. Following the Ameren Illinois Merger, this rider is applicable only for claims that occurred within IP's historical service territory. Similarly, the rider will permit recovery only from customers within IP's historical service territory.

Illinois Sales and Use Tax Exemptions and Credits

In Exelon Corporation v. Department of Revenue, the Illinois Supreme Court decided in 2009 that electricity is tangible personal property for purposes of the Illinois income tax investment credit. In March 2010, the United States Supreme Court refused to hear the case, and the decision became final. During the second quarter of 2010, Genco and AERG began claiming Illinois sales and use tax exemptions and credits for purchase transactions related to their generation operations. The basis for those claims is that the determination in the Exelon case that electricity is tangible personal property applies to sales and use tax manufacturing exemptions and credits. On November 2, 2011, EEI received a notice of proposed tax liability, documenting the state of Illinois' position that EEI did not qualify for the manufacturing exemption it used during 2010. Genco is challenging the State of Illinois' position. In December 2011, EEI filed a request for review by the Informal Conference Board of the Illinois Department of Revenue. Ameren and Genco do not believe that it is probable that the state of Illinois will prevail and therefore have not recorded a charge to earnings for the loss contingency. From the second quarter of 2010 through December 31, 2011, Ameren and Genco claimed manufacturing exemptions and credits of $27 million and $19 million, respectively.

Corporate Reorganization And Discontinued Operations

NOTE 16 – CORPORATE REORGANIZATION AND DISCONTINUED OPERATIONS

On October 1, 2010, after receiving all necessary approvals, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren (the AERG distribution) and the subsequent contribution by Ameren of the AERG stock to AER.

Upon the Ameren Illinois Merger, the debt and other obligations of CILCO and IP under their mortgage indentures, senior note indentures, and pollution control bond agreements become debt and obligations of Ameren Illinois. The property owned by CILCO and IP immediately before the Ameren Illinois Merger that was subject to the lien of their respective mortgage indentures remained subject to such lien, which continued to secure the bonds outstanding under such mortgage indenture subject to the release and other provisions of such mortgage indenture. The senior secured notes of IP and CILCO remained secured by the mortgage bonds held by their respective senior note trustee, subject to the release and other provisions of the respective senior note indenture. The debt and other obligations of CIPS remained debt and obligations of Ameren Illinois. Ameren Illinois secured the senior notes issued by CIPS with the benefit of a lien under the IP mortgage indenture. Ameren Illinois has also encumbered substantially all of the real estate, fixtures and equipment owned by CIPS immediately before the Ameren Illinois Merger with the lien of the IP mortgage indenture.

At the time of the Ameren Illinois Merger, the common stock of CILCO and IP, all wholly owned by Ameren, was canceled without consideration. Then, pursuant to the merger agreement: (i) every two shares of each series of IP preferred stock outstanding immediately prior to the Ameren Illinois Merger were automatically converted into one share of a newly created series of Ameren Illinois preferred stock having the same payment and redemption terms as the existing series of IP preferred stock, except to the extent that IP preferred stockholders exercised their dissenters' rights in accordance with Illinois law; and (ii) each outstanding share of CIPS common and preferred stock remained outstanding, except to the extent that CIPS preferred stockholders exercised their dissenters' rights in accordance with Illinois law. Stockholders holding approximately 8,337 shares and 423 shares of CIPS and IP preferred stock, respectively, exercised their dissenters' rights.

In its application for the FERC orders approving the Ameren Illinois Merger and the AERG distribution, Ameren committed to maintain a minimum 30% equity capital structure at Ameren Illinois after the Ameren Illinois Merger and the AERG distribution.

 

Ameren Illinois determined that the operating results of AERG qualified for discontinued operations presentation; therefore, Ameren Illinois segregated AERG's operating results and presented them separately as discontinued operations for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operation remain classified as continuing operations. The following table summarizes the operating results of Ameren Illinois' former merchant generation subsidiary, AERG, classified as discontinued operations in Ameren Illinois' statements of income for the years ended December 31, 2010, and 2009:

 

     2010      2009  

Operating revenues

   $ 274       $ 427   

Operating expenses

     201         233   

Operating income

     73         194   

Other income

     1         —     

Interest charges

     14         16   

Income taxes

     20         64   
  

 

 

    

 

 

 

Income from discontinued operations, net of tax

   $ 40       $ 114   
  

 

 

    

 

 

 

NOTE 16 CORPORATE REORGANIZATION AND DISCONTINUED OPERATIONS

On October 1, 2010, after receiving all necessary approvals, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren (the AERG distribution) and the subsequent contribution by Ameren of the AERG stock to AER.

Upon the Ameren Illinois Merger, the debt and other obligations of CILCO and IP under their mortgage indentures, senior note indentures, and pollution control bond agreements become debt and obligations of Ameren Illinois. The property owned by CILCO and IP immediately before the Ameren Illinois Merger that was subject to the lien of their respective mortgage indentures remained subject to such lien, which continued to secure the bonds outstanding under such mortgage indenture subject to the release and other provisions of such mortgage indenture. The senior secured notes of IP and CILCO remained secured by the mortgage bonds held by their respective senior note trustee, subject to the release and other provisions of the respective senior note indenture. The debt and other obligations of CIPS remained debt and obligations of Ameren Illinois. Ameren Illinois secured the senior notes issued by CIPS with the benefit of a lien under the IP mortgage indenture. Ameren Illinois has also encumbered substantially all of the real estate, fixtures and equipment owned by CIPS immediately before the Ameren Illinois Merger with the lien of the IP mortgage indenture.

At the time of the Ameren Illinois Merger, the common stock of CILCO and IP, all wholly owned by Ameren, was canceled without consideration. Then, pursuant to the merger agreement: (i) every two shares of each series of IP preferred stock outstanding immediately prior to the Ameren Illinois Merger were automatically converted into one share of a newly created series of Ameren Illinois preferred stock having the same payment and redemption terms as the existing series of IP preferred stock, except to the extent that IP preferred stockholders exercised their dissenters' rights in accordance with Illinois law; and (ii) each outstanding share of CIPS common and preferred stock remained outstanding, except to the extent that CIPS preferred stockholders exercised their dissenters' rights in accordance with Illinois law. Stockholders holding approximately 8,337 shares and 423 shares of CIPS and IP preferred stock, respectively, exercised their dissenters' rights.

In its application for the FERC orders approving the Ameren Illinois Merger and the AERG distribution, Ameren committed to maintain a minimum 30% equity capital structure at Ameren Illinois after the Ameren Illinois Merger and the AERG distribution.

 

Ameren Illinois determined that the operating results of AERG qualified for discontinued operations presentation; therefore, Ameren Illinois segregated AERG's operating results and presented them separately as discontinued operations for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operation remain classified as continuing operations. The following table summarizes the operating results of Ameren Illinois' former merchant generation subsidiary, AERG, classified as discontinued operations in Ameren Illinois' statements of income for the years ended December 31, 2010, and 2009:

 

     2010      2009  

Operating revenues

   $ 274       $ 427   

Operating expenses

     201         233   

Operating income

     73         194   

Other income

     1              

Interest charges

     14         16   

Income taxes

     20         64   
  

 

 

    

 

 

 

Income from discontinued operations, net of tax

   $ 40       $ 114   
  

 

 

    

 

 

 
Goodwill, Impairment And Other Charges

NOTE 17 – GOODWILL, IMPAIRMENT AND OTHER CHARGES

The following table summarizes the pretax charges recognized for the years ended December 31, 2011, 2010, and 2009:

 

 

 

Each of the above charges was recorded in the statement of income as "Goodwill, impairment and other charges," with the exception of the Ameren Missouri statement of income where it was recorded as "Loss from regulatory disallowance." Each of the charges is discussed below.

The goodwill and other asset impairment charges did not result in a violation of any Ameren or Ameren subsidiary debt covenants or counterparty agreements. The charges are not expected to have a material impact on future operations.

Goodwill

Ameren has three reporting units, which also represent Ameren's reportable segments. The Ameren reporting units are Ameren Missouri, Ameren Illinois, and Merchant Generation. Genco has one reporting unit, Merchant Generation. Ameren Illinois has one reporting unit, Ameren Illinois. Ameren's reporting units have been defined and goodwill has been evaluated at the operating segment level in accordance with authoritative accounting guidance. Our reporting units represent businesses for which discrete financial information is available and reviewed regularly by management.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events and circumstances indicate that the asset might be impaired. In 2011, FASB amended its guidance to simplify the testing of goodwill for impairment. The amended guidance provides an option to perform a qualitative assessment to determine whether further impairment testing is necessary. If the qualitative evaluation yields support that it is more likely than not that the fair value of a reporting unit exceeds its carrying value, the quantitative impairment test is not required. Ameren and Ameren Illinois adopted the qualitative goodwill evaluation model for its annual goodwill impairment test conducted as of October 31, 2011. Based on the results of Ameren's and Ameren Illinois' qualitative assessment, Ameren and Ameren Illinois believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values as of October 31, 2011, indicating no impairment of Ameren's and Ameren Illinois' goodwill. The following factors, not meant to be all-inclusive, were considered by Ameren and Ameren Illinois when assessing whether it was more likely than not that the fair value of the Ameren Illinois reporting unit exceeded its carrying value for the October 31, 2011 test:

 

 

Macroeconomic conditions, including those conditions within Ameren Illinois' service territory;

 

 

Pending rate case outcomes and future rate case outcomes;

 

 

Changes in laws and potential law changes, such as the IEIMA;

 

 

Observable industry market multiples; and

 

 

Actual and forecasted financial performance.

During 2010, Ameren recorded a noncash impairment charge of $420 million, which represented all of the goodwill assigned to Ameren's Merchant Generation reporting unit. Genco recorded a noncash impairment charge of $65 million, which represented all the goodwill assigned to Genco's Merchant Generation reporting unit. The impairments recorded in 2010 in the Merchant Generation segment were caused by a sustained decline in market prices for electricity, industry market multiples becoming observable at lower levels than previously estimated, and potentially more stringent environmental regulations being enacted.

Ameren and Ameren Illinois will continue to monitor the actual and forecasted operating results, cash flows, market capitalization, and observable industry market multiples of their reporting units for signs of possible declines in estimated fair value and potential goodwill impairment.

 

The following tables provide a reconciliation of the beginning and ending carrying amounts of goodwill by reporting unit, for Ameren, Ameren Illinois and Genco for the years ended December 31, 2011 and 2010:

Ameren

 

     2011      2010  
     Ameren
Illinois
     Ameren
Illinois
     Merchant
Generation
     Total(a)  

Gross goodwill at January 1

   $ 411       $ 411       $ 420       $ 831   

Accumulated impairment losses

     —           —           —           —     

Goodwill, net of accumulated impairment losses

   $ 411       $ 411       $ 420       $ 831   

Impairment losses during year

     —           —           420         420   
  

 

 

    

 

 

    

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411       $ —         $ 411   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

Ameren Illinois

 

     2011      2010  
     Ameren Illinois      Ameren Illinois  

Gross goodwill at January 1

   $ 411       $ 411   

Accumulated impairment losses

     —           —     
  

 

 

    

 

 

 

Goodwill, net of accumulated impairment losses

   $ 411       $ 411   

Impairment losses during the year

     —           —     
  

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411   
  

 

 

    

 

 

 

Genco

 

     2010  
     Merchant Generation  

Gross goodwill at January 1

   $ 65   

Accumulated impairment losses

     —     
  

 

 

 

Goodwill, net of accumulated impairment losses

   $ 65   

Impairment losses during the year

     65   
  

 

 

 

Goodwill, net of impairment losses at December 31

   $ —     
  

 

 

 

Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value.

During 2011, the MoPSC issued an electric rate order that disallowed the recovery of all costs of enhancements, or costs that would have been incurred absent the breach, related to the rebuilding of the Taum Sauk energy center in excess of the amount recovered from property insurance. Consequently, Ameren and Ameren Missouri each reported a pretax charge to earnings of $89 million. See Note 2 – Rate and Regulatory Matters for additional information.

At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers resulted in the elimination of 90 positions. Ameren and Genco each recorded the following pretax charges to earnings during 2011 related to the closure of these energy centers:

 

 

a $26 million noncash impairment, representing the remaining net investment in both energy centers;

 

 

a $4 million noncash impairment of materials and supplies; and

 

 

a $4 million estimate for future cash severance costs, which will be substantially paid during the first quarter of 2012.

The closure of these energy centers is primarily the result of the expected cost of complying with the CSAPR and the MATS. Genco determined that environmental compliance options for these four units were uneconomical. Another factor driving the closure of these energy centers was a lack of a multiyear capacity market managed by MISO, without which Genco was not positioned to make the substantial investment for environmental controls that would be required to keep these units in service. Ameren and Genco expect to receive cash tax benefits of $22 million and $33 million, respectively, as a result of the closure of these energy centers. Previously recorded AROs for ash pond closures, river structure, and asbestos removals at these energy centers were $38 million. Ameren and Genco expect cash expenditures over the next 10 years along with associated cash tax benefits of $16 million.

 

During 2010, Ameren and Genco evaluated their long-lived assets and recorded noncash pretax asset impairment charges of $101 million and $64 million, respectively, to reduce the carrying value of the Meredosia and Medina Valley energy centers to their estimated fair value during 2010.

In 2009, Genco recorded asset impairment charges of $6 million as a result of the termination of a rail line extension project at a Genco subsidiary and an adjustment of the carrying value of an office building owned by Genco to its estimated fair value as of December 31, 2009. The charge related to the office building was based on the net proceeds from its sale in 2010. In addition, AERG recorded an asset impairment charge of $1 million to adjust the carrying value of its Indian Trails generation facility's estimated fair value as of December 31, 2009. This charge was based on the net proceeds from the sale of the facility in January 2010.

Intangible Assets

We evaluate emission allowances for impairment if events or changes in circumstances indicate that they will not or cannot be used in operations.

Prior to 2010, Ameren, Ameren Missouri and Genco expected to use their SO2 emission allowances for ongoing operations. In July 2010, the EPA issued the proposed CSAPR, which would restrict the use of existing SO2 emission allowances. As a result, Ameren, Ameren Missouri and Genco no longer expected all of their SO2 emission allowances would be used in operations. Therefore, during 2010, Ameren, Ameren Missouri and Genco recorded an impairment charge to reduce the carrying value of their SO2 emission allowances to their estimated fair value. Ameren's and Genco's noncash pretax impairment charge was $68 million and $41 million, respectively. Ameren Missouri recorded a $23 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to SO2 emission allowances. Therefore, the Ameren Missouri SO2 emission allowance impairment had no impact on earnings. The fair value of the SO2 emission allowances was based on observable and unobservable inputs.

In July 2011, the EPA issued CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of pre-existing SO2 and NOx allowances to the acid rain program and to the NOx budget trading program, respectively. As a result, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash pretax impairment charge of $2 million and $1 million, respectively. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact on earnings.

NOTE 17 – GOODWILL, IMPAIRMENT AND OTHER CHARGES

The following table summarizes the pretax charges recognized for the years ended December 31, 2011, 2010, and 2009:

 

     Goodwill      Long-Lived
Assets and  Related
Charges
     Emission
Allowances
     Total  

2011:

           

Ameren(a)

   $ —         $ 123       $ 2       $ 125   

Ameren Missouri

     —           89         —           89   

Genco

     —           34         1         35   

2010:

           

Ameren(a)

     420         101         68         589   

Genco

     65         64         41         170   

2009:

           

Ameren(a)

     —           7         —           7   

Genco

     —           6         —           6   

 

(a) Includes amounts for registrant and nonregistrant subsidiaries.

Each of the above charges was recorded in the statement of income as "Goodwill, impairment and other charges," with the exception of the Ameren Missouri statement of income where it was recorded as "Loss from regulatory disallowance." Each of the charges is discussed below.

The goodwill and other asset impairment charges did not result in a violation of any Ameren or Ameren subsidiary debt covenants or counterparty agreements. The charges are not expected to have a material impact on future operations.

Goodwill

Ameren has three reporting units, which also represent Ameren's reportable segments. The Ameren reporting units are Ameren Missouri, Ameren Illinois, and Merchant Generation. Genco has one reporting unit, Merchant Generation. Ameren Illinois has one reporting unit, Ameren Illinois. Ameren's reporting units have been defined and goodwill has been evaluated at the operating segment level in accordance with authoritative accounting guidance. Our reporting units represent businesses for which discrete financial information is available and reviewed regularly by management.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events and circumstances indicate that the asset might be impaired. In 2011, FASB amended its guidance to simplify the testing of goodwill for impairment. The amended guidance provides an option to perform a qualitative assessment to determine whether further impairment testing is necessary. If the qualitative evaluation yields support that it is more likely than not that the fair value of a reporting unit exceeds its carrying value, the quantitative impairment test is not required. Ameren and Ameren Illinois adopted the qualitative goodwill evaluation model for its annual goodwill impairment test conducted as of October 31, 2011. Based on the results of Ameren's and Ameren Illinois' qualitative assessment, Ameren and Ameren Illinois believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values as of October 31, 2011, indicating no impairment of Ameren's and Ameren Illinois' goodwill. The following factors, not meant to be all-inclusive, were considered by Ameren and Ameren Illinois when assessing whether it was more likely than not that the fair value of the Ameren Illinois reporting unit exceeded its carrying value for the October 31, 2011 test:

 

 

Macroeconomic conditions, including those conditions within Ameren Illinois' service territory;

 

 

Pending rate case outcomes and future rate case outcomes;

 

 

Changes in laws and potential law changes, such as the IEIMA;

 

 

Observable industry market multiples; and

 

 

Actual and forecasted financial performance.

During 2010, Ameren recorded a noncash impairment charge of $420 million, which represented all of the goodwill assigned to Ameren's Merchant Generation reporting unit. Genco recorded a noncash impairment charge of $65 million, which represented all the goodwill assigned to Genco's Merchant Generation reporting unit. The impairments recorded in 2010 in the Merchant Generation segment were caused by a sustained decline in market prices for electricity, industry market multiples becoming observable at lower levels than previously estimated, and potentially more stringent environmental regulations being enacted.

Ameren and Ameren Illinois will continue to monitor the actual and forecasted operating results, cash flows, market capitalization, and observable industry market multiples of their reporting units for signs of possible declines in estimated fair value and potential goodwill impairment.

 

The following tables provide a reconciliation of the beginning and ending carrying amounts of goodwill by reporting unit, for Ameren, Ameren Illinois and Genco for the years ended December 31, 2011 and 2010:

Ameren

 

     2011      2010  
     Ameren
Illinois
     Ameren
Illinois
     Merchant
Generation
     Total(a)  

Gross goodwill at January 1

   $ 411       $ 411       $ 420       $ 831   

Accumulated impairment losses

     —           —           —           —     

Goodwill, net of accumulated impairment losses

   $ 411       $ 411       $ 420       $ 831   

Impairment losses during year

     —           —           420         420   
  

 

 

    

 

 

    

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411       $ —         $ 411   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrants and nonregistrant subsidiaries.

Ameren Illinois

 

     2011      2010  
     Ameren Illinois      Ameren Illinois  

Gross goodwill at January 1

   $ 411       $ 411   

Accumulated impairment losses

     —           —     
  

 

 

    

 

 

 

Goodwill, net of accumulated impairment losses

   $ 411       $ 411   

Impairment losses during the year

     —           —     
  

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411   
  

 

 

    

 

 

 

Genco

 

     2010  
     Merchant Generation  

Gross goodwill at January 1

   $ 65   

Accumulated impairment losses

     —     
  

 

 

 

Goodwill, net of accumulated impairment losses

   $ 65   

Impairment losses during the year

     65   
  

 

 

 

Goodwill, net of impairment losses at December 31

   $ —     
  

 

 

 

Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value.

During 2011, the MoPSC issued an electric rate order that disallowed the recovery of all costs of enhancements, or costs that would have been incurred absent the breach, related to the rebuilding of the Taum Sauk energy center in excess of the amount recovered from property insurance. Consequently, Ameren and Ameren Missouri each reported a pretax charge to earnings of $89 million. See Note 2 – Rate and Regulatory Matters for additional information.

At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers resulted in the elimination of 90 positions. Ameren and Genco each recorded the following pretax charges to earnings during 2011 related to the closure of these energy centers:

 

 

a $26 million noncash impairment, representing the remaining net investment in both energy centers;

 

 

a $4 million noncash impairment of materials and supplies; and

 

 

a $4 million estimate for future cash severance costs, which will be substantially paid during the first quarter of 2012.

The closure of these energy centers is primarily the result of the expected cost of complying with the CSAPR and the MATS. Genco determined that environmental compliance options for these four units were uneconomical. Another factor driving the closure of these energy centers was a lack of a multiyear capacity market managed by MISO, without which Genco was not positioned to make the substantial investment for environmental controls that would be required to keep these units in service. Ameren and Genco expect to receive cash tax benefits of $22 million and $33 million, respectively, as a result of the closure of these energy centers. Previously recorded AROs for ash pond closures, river structure, and asbestos removals at these energy centers were $38 million. Ameren and Genco expect cash expenditures over the next 10 years along with associated cash tax benefits of $16 million.

 

During 2010, Ameren and Genco evaluated their long-lived assets and recorded noncash pretax asset impairment charges of $101 million and $64 million, respectively, to reduce the carrying value of the Meredosia and Medina Valley energy centers to their estimated fair value during 2010.

In 2009, Genco recorded asset impairment charges of $6 million as a result of the termination of a rail line extension project at a Genco subsidiary and an adjustment of the carrying value of an office building owned by Genco to its estimated fair value as of December 31, 2009. The charge related to the office building was based on the net proceeds from its sale in 2010. In addition, AERG recorded an asset impairment charge of $1 million to adjust the carrying value of its Indian Trails generation facility's estimated fair value as of December 31, 2009. This charge was based on the net proceeds from the sale of the facility in January 2010.

Intangible Assets

We evaluate emission allowances for impairment if events or changes in circumstances indicate that they will not or cannot be used in operations.

Prior to 2010, Ameren, Ameren Missouri and Genco expected to use their SO2 emission allowances for ongoing operations. In July 2010, the EPA issued the proposed CSAPR, which would restrict the use of existing SO2 emission allowances. As a result, Ameren, Ameren Missouri and Genco no longer expected all of their SO2 emission allowances would be used in operations. Therefore, during 2010, Ameren, Ameren Missouri and Genco recorded an impairment charge to reduce the carrying value of their SO2 emission allowances to their estimated fair value. Ameren's and Genco's noncash pretax impairment charge was $68 million and $41 million, respectively. Ameren Missouri recorded a $23 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to SO2 emission allowances. Therefore, the Ameren Missouri SO2 emission allowance impairment had no impact on earnings. The fair value of the SO2 emission allowances was based on observable and unobservable inputs.

In July 2011, the EPA issued CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of pre-existing SO2 and NOx allowances to the acid rain program and to the NOx budget trading program, respectively. As a result, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash pretax impairment charge of $2 million and $1 million, respectively. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact on earnings.

NOTE 17 – GOODWILL, IMPAIRMENT AND OTHER CHARGES

The following table summarizes the pretax charges recognized for the years ended December 31, 2011, 2010, and 2009:

 

     Goodwill      Long-Lived
Assets and  Related
Charges
     Emission
Allowances
     Total  

2011:

           

Ameren(a)

   $ —         $ 123       $ 2       $ 125   

Ameren Missouri

     —           89         —           89   

Genco

     —           34         1         35   

2010:

           

Ameren(a)

     420         101         68         589   

Genco

     65         64         41         170   

2009:

           

Ameren(a)

     —           7         —           7   

Genco

     —           6         —           6   

 

(a) Includes amounts for registrant and nonregistrant subsidiaries.

Each of the above charges was recorded in the statement of income as "Goodwill, impairment and other charges," with the exception of the Ameren Missouri statement of income where it was recorded as "Loss from regulatory disallowance." Each of the charges is discussed below.

The goodwill and other asset impairment charges did not result in a violation of any Ameren or Ameren subsidiary debt covenants or counterparty agreements. The charges are not expected to have a material impact on future operations.

Goodwill

Ameren has three reporting units, which also represent Ameren's reportable segments. The Ameren reporting units are Ameren Missouri, Ameren Illinois, and Merchant Generation. Genco has one reporting unit, Merchant Generation. Ameren Illinois has one reporting unit, Ameren Illinois. Ameren's reporting units have been defined and goodwill has been evaluated at the operating segment level in accordance with authoritative accounting guidance. Our reporting units represent businesses for which discrete financial information is available and reviewed regularly by management.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events and circumstances indicate that the asset might be impaired. In 2011, FASB amended its guidance to simplify the testing of goodwill for impairment. The amended guidance provides an option to perform a qualitative assessment to determine whether further impairment testing is necessary. If the qualitative evaluation yields support that it is more likely than not that the fair value of a reporting unit exceeds its carrying value, the quantitative impairment test is not required. Ameren and Ameren Illinois adopted the qualitative goodwill evaluation model for its annual goodwill impairment test conducted as of October 31, 2011. Based on the results of Ameren's and Ameren Illinois' qualitative assessment, Ameren and Ameren Illinois believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values as of October 31, 2011, indicating no impairment of Ameren's and Ameren Illinois' goodwill. The following factors, not meant to be all-inclusive, were considered by Ameren and Ameren Illinois when assessing whether it was more likely than not that the fair value of the Ameren Illinois reporting unit exceeded its carrying value for the October 31, 2011 test:

 

 

Macroeconomic conditions, including those conditions within Ameren Illinois' service territory;

 

 

Pending rate case outcomes and future rate case outcomes;

 

 

Changes in laws and potential law changes, such as the IEIMA;

 

 

Observable industry market multiples; and

 

 

Actual and forecasted financial performance.

During 2010, Ameren recorded a noncash impairment charge of $420 million, which represented all of the goodwill assigned to Ameren's Merchant Generation reporting unit. Genco recorded a noncash impairment charge of $65 million, which represented all the goodwill assigned to Genco's Merchant Generation reporting unit. The impairments recorded in 2010 in the Merchant Generation segment were caused by a sustained decline in market prices for electricity, industry market multiples becoming observable at lower levels than previously estimated, and potentially more stringent environmental regulations being enacted.

Ameren and Ameren Illinois will continue to monitor the actual and forecasted operating results, cash flows, market capitalization, and observable industry market multiples of their reporting units for signs of possible declines in estimated fair value and potential goodwill impairment.

 

The following tables provide a reconciliation of the beginning and ending carrying amounts of goodwill by reporting unit, for Ameren, Ameren Illinois and Genco for the years ended December 31, 2011 and 2010:

Ameren

 

     2011      2010  
     Ameren
Illinois
     Ameren
Illinois
     Merchant
Generation
     Total(a)  

Gross goodwill at January 1

   $ 411       $ 411       $ 420       $ 831   

Accumulated impairment losses

     —           —           —           —     

Goodwill, net of accumulated impairment losses

   $ 411       $ 411       $ 420       $ 831   

Impairment losses during year

     —           —           420         420   
  

 

 

    

 

 

    

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411       $ —         $ 411   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrants and nonregistrant subsidiaries.

Ameren Illinois

 

     2011      2010  
     Ameren Illinois      Ameren Illinois  

Gross goodwill at January 1

   $ 411       $ 411   

Accumulated impairment losses

     —           —     
  

 

 

    

 

 

 

Goodwill, net of accumulated impairment losses

   $ 411       $ 411   

Impairment losses during the year

     —           —     
  

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411   
  

 

 

    

 

 

 

Genco

 

     2010  
     Merchant Generation  

Gross goodwill at January 1

   $ 65   

Accumulated impairment losses

     —     
  

 

 

 

Goodwill, net of accumulated impairment losses

   $ 65   

Impairment losses during the year

     65   
  

 

 

 

Goodwill, net of impairment losses at December 31

   $ —     
  

 

 

 

Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value.

During 2011, the MoPSC issued an electric rate order that disallowed the recovery of all costs of enhancements, or costs that would have been incurred absent the breach, related to the rebuilding of the Taum Sauk energy center in excess of the amount recovered from property insurance. Consequently, Ameren and Ameren Missouri each reported a pretax charge to earnings of $89 million. See Note 2 – Rate and Regulatory Matters for additional information.

At the end of 2011, Genco ceased operations of its Meredosia and Hutsonville energy centers. The closure of these energy centers resulted in the elimination of 90 positions. Ameren and Genco each recorded the following pretax charges to earnings during 2011 related to the closure of these energy centers:

 

 

a $26 million noncash impairment, representing the remaining net investment in both energy centers;

 

 

a $4 million noncash impairment of materials and supplies; and

 

 

a $4 million estimate for future cash severance costs, which will be substantially paid during the first quarter of 2012.

The closure of these energy centers is primarily the result of the expected cost of complying with the CSAPR and the MATS. Genco determined that environmental compliance options for these four units were uneconomical. Another factor driving the closure of these energy centers was a lack of a multiyear capacity market managed by MISO, without which Genco was not positioned to make the substantial investment for environmental controls that would be required to keep these units in service. Ameren and Genco expect to receive cash tax benefits of $22 million and $33 million, respectively, as a result of the closure of these energy centers. Previously recorded AROs for ash pond closures, river structure, and asbestos removals at these energy centers were $38 million. Ameren and Genco expect cash expenditures over the next 10 years along with associated cash tax benefits of $16 million.

 

During 2010, Ameren and Genco evaluated their long-lived assets and recorded noncash pretax asset impairment charges of $101 million and $64 million, respectively, to reduce the carrying value of the Meredosia and Medina Valley energy centers to their estimated fair value during 2010.

In 2009, Genco recorded asset impairment charges of $6 million as a result of the termination of a rail line extension project at a Genco subsidiary and an adjustment of the carrying value of an office building owned by Genco to its estimated fair value as of December 31, 2009. The charge related to the office building was based on the net proceeds from its sale in 2010. In addition, AERG recorded an asset impairment charge of $1 million to adjust the carrying value of its Indian Trails generation facility's estimated fair value as of December 31, 2009. This charge was based on the net proceeds from the sale of the facility in January 2010.

Intangible Assets

We evaluate emission allowances for impairment if events or changes in circumstances indicate that they will not or cannot be used in operations.

Prior to 2010, Ameren, Ameren Missouri and Genco expected to use their SO2 emission allowances for ongoing operations. In July 2010, the EPA issued the proposed CSAPR, which would restrict the use of existing SO2 emission allowances. As a result, Ameren, Ameren Missouri and Genco no longer expected all of their SO2 emission allowances would be used in operations. Therefore, during 2010, Ameren, Ameren Missouri and Genco recorded an impairment charge to reduce the carrying value of their SO2 emission allowances to their estimated fair value. Ameren's and Genco's noncash pretax impairment charge was $68 million and $41 million, respectively. Ameren Missouri recorded a $23 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to SO2 emission allowances. Therefore, the Ameren Missouri SO2 emission allowance impairment had no impact on earnings. The fair value of the SO2 emission allowances was based on observable and unobservable inputs.

In July 2011, the EPA issued CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of pre-existing SO2 and NOx allowances to the acid rain program and to the NOx budget trading program, respectively. As a result, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash pretax impairment charge of $2 million and $1 million, respectively. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact on earnings.

Segment Information
Segment Information

NOTE 18 – SEGMENT INFORMATION

Ameren has three reportable segments: Ameren Missouri, Ameren Illinois, and Merchant Generation. The Ameren Missouri segment for Ameren and Ameren Missouri includes all the operations of Ameren Missouri's business as described in Note 1 – Summary of Significant Accounting Policies. The Ameren Illinois segment for Ameren and Ameren Illinois consists of all of the operations of Ameren Illinois as described in Note 1 – Summary of Significant Accounting Policies. The Merchant Generation segment for Ameren consists primarily of the operations or activities of Genco, including EEI, AERG, Medina Valley and Marketing Company. The category called Other primarily includes Ameren parent company activities, Ameren Services, and ATXI.

 

The following table presents information about the reported revenues and specified items reflected in Ameren's net income for the years ended December 31, 2011, 2010, and 2009, and total assets as of December 31, 2011, 2010, and 2009.

Ameren

 

      Ameren
Missouri
    

Ameren

Illinois

Regulated

Segment

    

Merchant

Generation

    Other    

Intersegment

Eliminations

    Consolidated  

2011

              

External revenues

   $ 3,358       $      2,774       $      1,394      $ 5      $ -      $ 7,531   

Intersegment revenues

     25         13         235        4        (277     -   

Depreciation and amortization

     408         215         143        19        -        785   

Interest and dividend income

     30         1         -        44        (43     32   

Interest charges

     209         136         105        44        (43     451   

Income taxes (benefit)

     161         127         32        (10                 -        310   

Net income (loss) attributable to Ameren Corporation(a)

     287         193         45        (6     -        519   

Capital expenditures

     550         351         153        (24 )(b)      -        1,030   

Total assets

         12,757         7,213         3,833        1,211        (1,369         23,645   

2010

              

External revenues

   $ 3,176       $ 3,002       $ 1,459      $ 1      $ -      $ 7,638   

Intersegment revenues

     21         12         234        13        (280     -   

Depreciation and amortization

     382         210         146        27        -        765   

Interest and dividend income

     31         1         1        25        (25     33   

Interest charges

     213         143         133        35        (27     497   

Income taxes (benefit)

     199         137         6        (17     -        325   

Net income (loss) attributable to Ameren Corporation(a)

     364         208         (409     (24     -        139   

Capital expenditures

     624         281         101        36        -        1,042   

Total assets

     12,504         7,406         3,934        1,354        (1,687     23,511   

2009

              

External revenues

   $ 2,847       $ 2,957       $ 1,322      $ 9      $ -      $ 7,135   

Intersegment revenues

     27         27         390        19        (463     -   

Depreciation and amortization

     357         216         126        26        -        725   

Interest and dividend income

     29         6         -        33        (38     30   

Interest charges

     229         153         119        48        (41     508   

Income taxes (benefit)

     128         79         151        (26     -        332   

Net income (loss) attributable to Ameren Corporation(a)

     259         127         247        (21     -        612   

Capital expenditures

     882         352         408        68        -        1,710   

Total assets

     12,219         7,181         4,751        1,814        (2,263     23,702   

 

Selected Quarterly Information
Selected Quarterly Information

SELECTED QUARTERLY INFORMATION (Unaudited) (In millions, except per share amounts)

 

Quarter Ended     

Operating

Revenues

      

Operating

Income

       Net Income
(Loss)
      

Net Income (Loss)
Available

to Common
Stockholder

 

Ameren Missouri

                                           

March 31, 2011

     $ 772         $ 77         $ 22         $ 21   

March 31, 2010

       682           90           28           27   

June 30, 2011

       822           176           91           90   

June 30, 2010

       761           197           115           113   

September 30, 2011

       1,115           333           191           190   

September 30, 2010

       1,060           385           224           223   

December 31, 2011

       674           23           (14        (14

December 31, 2010

       694           39           2           1   

 

Quarter Ended     

Operating

Revenues

      

Operating

Income

       Income from
Continuing
Operations
       Net Income        Net Income
Available
to Common
Stockholder
 

Ameren Illinois

                                                      

March 31, 2011

     $     808         $ 88         $ 34         $ 34         $ 33   

March 31, 2010

       911           98           36           48           47   

June 30, 2011

       623           99               38                 38               37   

June 30, 2010

       647               112           48           57           55   

September 30, 2011

       745           196           98           98           98   

September 30, 2010

       746           182           91           110           109   

December 31, 2011

       611           75           26           26           25   

December 31, 2010

       710           106           37           37           37   

 

Quarter Ended     

Operating

Revenues

      

Operating

Income (Loss)

       Net Income (Loss)        Net Income (Loss)
Attributable to
Ameren Energy
Generating Company
 

Genco

                                           

March 31, 2011

     $     241         $     54         $     22         $     21   

March 31, 2010

       266           62           24           23   

June 30, 2011

       260           37           13           13   

June 30, 2010

       275           45           14           13   

September 30, 2011

       327           10           (4        (5

September 30, 2010

       335           (99        (100        (101

December 31, 2011

       238           38           14           15   

December 31, 2010

       250           54           26           26   
Schedule I - Condensed Financial Information Of Parent
Condensed Financial Information Of Parent

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT

AMEREN CORPORATION

CONDENSED STATEMENT OF INCOME

For the Years Ended December 31, 2011, 2010 and 2009

(In millions)      2011        2010        2009  

Operating revenues

     $ -         $ -         $ -   

Goodwill, impairment and other charges

       -           372           -   

Operating expenses

       15           24           20   

Operating loss

       (15        (396        (20

Equity in earnings of subsidiaries

            527                535                625   

Interest income from affiliates

       44           28           36   

Miscellaneous expense

       4           3           4   

Interest charges

       41           56           37   

Income tax (benefit)

       (8        (31        (12

Net income

     $ 519         $ 139         $ 612   

 

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT

AMEREN CORPORATION

CONDENSED BALANCE SHEET

(In millions)    December 31, 2011      December 31, 2010  

Assets:

     

Cash and cash equivalents

   $ 3       $ 4   

Advances to money pool

     340         64   

Accounts and notes receivable – affiliates

     57         405   

Other current assets

     -         2   

Total current assets

     400         475   

Investments in subsidiaries

     7,532         7,681   

Note receivable – affiliates

     425         425   

Other non-current assets

     333         403   

Total assets

   $ 8,690       $ 8,984   

Liabilities and Stockholders' Equity:

     

Short-term debt

   $ 148       $ 269   

Accounts payable – affiliates

     13         41   

Other current liabilities

     62         75   

Total current liabilities

     223         385   

Credit facility borrowings

     -         360   

Long-term debt

     424         423   

Other deferred credits and liabilities

     74         69   

Total liabilities

     721         1,237   

Commitments and Contingencies

     

Stockholders' Equity:

     

Common stock, $.01 par value, 400.0 shares authorized shares outstanding
of 242.6 and 240.4, respectively

     2         2   

Other paid-in capital, principally premium on common stock

     5,598         5,520   

Retained earnings

     2,369         2,225   

Total stockholders' equity

     7,969         7,747   

Total liabilities and stockholders' equity

   $     8,690       $     8,984   

 

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT

AMEREN CORPORATION

CONDENSED STATEMENT OF CASH FLOWS

For the Years Ended December 31, 2011, 2010 and 2009

(In millions)    2011     Restated 2010     Restated 2009  

Net cash flows provided by operating activities

   $ 804      $ 241      $ 270   

Cash flows from investing activities:

      

Money pool advances, net

     (276     18             300   

Notes receivable – affiliates, net

            358             242        (712

Investments in subsidiaries

     (94     (13     (831

Other

     (2     1        -   

Net cash flows provided by (used in) investing activities

     (14     248        (1,243

Cash flows from financing activities:

      

Dividends on common stock

     (375     (368     (338

Short-term debt and credit facility borrowings, net

     (481     (221     275   

Issuances of:

      

Long-term debt

     -        -        423   

Common stock

     65        80        634   

Other

     -        -        (19

Net cash flows provided by (used in) financing activities

     (791     (509     975   

SCHEDULE I – CONDENSED FINANCIAL INFORMATION OF PARENT

AMEREN CORPORATION

CONDENSED STATEMENT OF CASH FLOWS

For the Years Ended December 31, 2011, 2010 and 2009

(In millions)    2011     Restated 2010     Restated 2009  

Net change in cash and equivalents

   $ (1   $ (20   $ 2   

Cash and cash equivalents at beginning of year

     4        24        22   

Cash and cash equivalents at the end of year

   $ 3      $ 4      $ 24   

Cash dividends received from consolidated subsidiaries

   $       730      $       368      $       338   

AMEREN CORPORATION (parent company only)

NOTES TO CONDENSED FINANCIAL STATEMENTS

December 31, 2011

NOTE 1 – BASIS OF PRESENTATION

Ameren Corporation (parent company only) is a public utility holding company that conducts substantially all of its business operations through its subsidiaries. As specified in Note 5 – Long-term Debt and Equity Financings under Part II, Item 8, of this report, there are restrictions on Ameren Corporation's (parent company only) ability to obtain funds from certain of its subsidiaries through dividends, loans or advances. In accordance with authoritative accounting guidance, Ameren Corporation (parent company only) has accounted for wholly owned subsidiaries using the equity method. These financial statements are presented on a condensed basis. Additional disclosures relating to the parent company financial statements are included within the combined notes under Part II, Item 8, of this report.

NOTE 2 – SHORT-TERM DEBT AND LIQUIDITY

See Note 4 – Short-term Debt and Liquidity under Part II, Item 8, of this report for a description and details of short-term debt and liquidity needs of Ameren Corporation (parent company only).

NOTE 3 – LONG-TERM OBLIGATIONS

See Note 5 – Long-term Debt and Equity Financings under Part II, Item 8, of this report for a description and details of long-term obligations of Ameren Corporation (parent company only).

NOTE 4 – COMMITMENTS AND CONTINGENCIES

See Note 15 – Commitments and Contingencies under Part II Item 8, of this report for a description of all material contingencies and guarantees outstanding of Ameren Corporation (parent company only).

NOTE 5 – GOODWILL AND OTHER ASSET IMPAIRMENTS

See Note 17 – Goodwill, Impairments and Other Charges under Part II, Item 8, of this report for a description of the impairment charges incurred by Ameren Corporation (parent company only) in 2010.

NOTE 6 – RESTATEMENTS

During 2011, Ameren Corporation (parent company only) identified an error in the cash flow statement classification of intercompany notes receivable that impacted years ended December 31, 2010, and 2009. For the year ended December 31, 2010, previously reported cash flows provided by operating activities were $522 million and cash flows used in investing activities were $33 million. As corrected herein, cash flows provided by operating activities were $241 million and cash flows provided by investing activities were $248 million. For the year ended December 31, 2009, previously reported cash flows used in operating activities were $442 million and cash flows used in investing activities were $531 million. As corrected herein, cash flows provided by operating activities were $270 million and cash flows used in investing activities were $1,243 million.

Schedule II - Valuation And Qualifying Accounts
Valuation And Qualifying Accounts

SCHEDULE II – VALUATION AND QUALIFYING ACCOUNTS

FOR THE YEARS ENDED DECEMBER 31, 2011, 2010 AND 2009

 
(in millions)                                  

Column A

   Column B      Column C      Column D     Column E  
Description    Balance at
Beginning
of Period
    

(1)

Charged to Costs
and Expenses

    

(2)

Charged to Other
Accounts

     Deductions(a)     Balance at End
of Period
 

Ameren:

             

Deducted from assets – allowance for doubtful accounts:

             

2011

   $     23       $     41       $     -       $     44      $     20   

2010

     24         33         -         34        23   

2009

     28         37         -         41        24   

Ameren Missouri:

             

Deducted from assets – allowance for doubtful accounts:

             

2011

   $ 8       $     17       $     -       $     18      $ 7   

2010

     6         14         -         12        8   

2009

     8         8         -         10        6   

Ameren Illinois:

             

Deducted from assets – allowance for doubtful accounts:

             

2011

   $     13       $ 24       $ -       $ 24      $     13   

2010

     17         18         -         22        13   

2009

     21         27         -         31        17   

 

Summary Of Significant Accounting Policies (Policy)

General

Ameren, headquartered in St. Louis, Missouri, is a public utility holding company under PUHCA 2005, administered by FERC. Ameren's primary assets are the common stock of its subsidiaries. Ameren's subsidiaries are separate, independent legal entities with separate businesses, assets, and liabilities. These subsidiaries operate, as the case may be, rate-regulated electric generation, transmission and distribution businesses, rate-regulated natural gas transmission and distribution businesses, and merchant electric generation businesses in Missouri and Illinois. Dividends on Ameren's common stock and the payment of other expenses by Ameren depend on distributions made to it by its subsidiaries. Ameren's principal subsidiaries are listed below. Also see the Glossary of Terms and Abbreviations at the front of this report.

 

Ÿ  

Union Electric Company, or Ameren Missouri, operates a rate-regulated electric generation, transmission and distribution business, and a rate-regulated natural gas transmission and distribution business in Missouri. Ameren Missouri was incorporated in Missouri in 1922 and is successor to a number of companies, the oldest of which was organized in 1881. It is the largest electric utility in the state of Missouri. It supplies electric and natural gas service to a 24,000-square-mile area in central and eastern Missouri. This area has an estimated population of 2.9 million and includes the Greater St. Louis area. Ameren Missouri supplies electric service to 1.2 million customers and natural gas service to 127,000 customers.

Ÿ  

Ameren Illinois Company, or Ameren Illinois, operates a rate-regulated electric and natural gas transmission and distribution business in Illinois. Ameren Illinois was created by the merger of CILCO and IP with and into CIPS. CIPS was incorporated in Illinois in 1923 and is successor to a number of companies, the oldest of which was organized in 1902. Ameren Illinois supplies electric and natural gas utility service to portions of central and southern Illinois having an estimated population of 3.1 million in an area of 40,000 square miles. Ameren Illinois supplies electric service to 1.2 million customers and natural gas service to 809,000 customers.

Ÿ  

AER consists of non-rate-regulated operations, including Genco, AERG, Marketing Company and Medina Valley. The Medina Valley energy center was sold in February 2012. Genco operates a merchant electric generation business in Illinois and holds an 80% ownership interest in EEI, which it consolidates for financial reporting purposes. Genco was incorporated in Illinois in March 2000. Genco's coal and natural gas electric generating facilities are expected to have capacity of 3,095 and 1,348 megawatts, respectively, at the time of the 2012 peak summer electrical demand.

Ameren has various other subsidiaries responsible for activities such as the provision of shared services.

On October 1, 2010, Ameren, CIPS, CILCO, IP, AERG and AER completed a two-step corporate internal reorganization. The first step of the reorganization was the Ameren Illinois Merger. Upon consummation of the Ameren Illinois Merger, the separate legal existence of CILCO and IP ended. The second step of the reorganization involved the distribution of AERG stock from Ameren Illinois to Ameren and the subsequent contribution by Ameren of the AERG stock to AER. The Ameren Illinois Merger and the distribution of AERG stock were accounted for as transactions between entities under common control. In accordance with authoritative accounting guidance, assets and liabilities transferred between entities under common control were accounted for at the historical cost basis of the common parent, Ameren, as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in Ameren Illinois included purchase accounting adjustments related to Ameren's acquisition of CILCORP in 2003. Ameren Illinois accounted for the AERG distribution as a spinoff. Ameren Illinois transferred AERG to Ameren based on AERG's carrying value. Ameren Illinois has segregated AERG's operating results and cash flows and presented them separately as discontinued operations in its consolidated statement of income and consolidated statement of cash flows, respectively, for all periods presented prior to October 1, 2010, in this report. For Ameren's financial statements, AERG's results of operations remain classified as continuing operations. See Note 16 – Corporate Reorganization and Discontinued Operations for additional information.

Effective January 1, 2010, as part of an internal reorganization, AER transferred its 80% stock ownership interest in EEI to Genco through a capital contribution. The

transfer of EEI to Genco was accounted for as a transaction between entities under common control, whereby Genco accounted for the transfer at the historical carrying value of the parent (Ameren) as if the transfer had occurred at the beginning of the earliest reporting period presented. Ameren's historical cost basis in EEI included purchase accounting adjustments relating to Ameren's acquisition of an additional 20% ownership interest in EEI in 2004. This transfer required Genco's prior-period financial statements to be retrospectively combined for all periods presented. Consequently, Genco's prior-period consolidated financial statements reflect EEI as if it had been a subsidiary of Genco. Ameren and Genco consolidate EEI for financial reporting purposes.

The financial statements of Ameren, Ameren Illinois and Genco are prepared on a consolidated basis. Ameren Missouri has no subsidiaries, and therefore its financial statements were not prepared on a consolidated basis. All significant intercompany transactions have been eliminated. All tabular dollar amounts are in millions, unless otherwise indicated.

Our accounting policies conform to GAAP. Our financial statements reflect all adjustments (which include normal, recurring adjustments) that are necessary, in our opinion, for a fair presentation of our results. The preparation of financial statements in conformity with GAAP requires that Ameren management make certain estimates and assumptions. Such estimates and assumptions affect reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the dates of financial statements, and the reported amounts of revenues and expenses during the reported periods. Actual results could differ from those estimates.

Regulation

Certain Ameren subsidiaries are regulated by the MoPSC, the ICC, and FERC. In accordance with authoritative accounting guidance regarding accounting for the effects of certain types of regulation, Ameren Missouri and Ameren Illinois defer certain costs as assets pursuant to actions of rate regulators or based on the expectation they will be able to recover such costs in rates charged to customers. Ameren Missouri and Ameren Illinois also defer certain amounts as liabilities pursuant to actions of rate regulators or based on the expectation that such amounts will be returned to customers in future rates. Regulatory assets and liabilities are amortized consistent with the period of expected regulatory treatment. See Note 2 – Rate and Regulatory Matters for additional information on regulatory assets and liabilities. In addition, other costs that Ameren Missouri and Ameren Illinois expect to recover from customers are recorded as construction work in progress and property and plant, net. See Note 3 – Property and Plant, Net.

Allowance for Funds Used During Construction

In our rate-regulated operations, we capitalize the allowance for funds used during construction, or the cost of borrowed funds and the cost of equity funds (preferred and common stockholders' equity) applicable to rate-regulated construction expenditures, as is the utility industry accounting practice. Allowance for funds used during construction does not represent a current source of cash funds. This accounting practice offsets the effect on earnings of the cost of financing current construction, and it treats such financing costs in the same manner as construction charges for labor and materials.

Under accepted ratemaking practice, cash recovery of allowance for funds used during construction and other construction costs occurs when completed projects are placed in service and reflected in customer rates. The following table presents the annual allowance for funds used during construction rates that were utilized during 2011, 2010 and 2009:

 

          2011              2010              2009      

Ameren

     8% - 9%          8% - 9%          6% - 9%    

Ameren Missouri

     8             8             6       

Ameren Illinois

     9             9             9       

Investments

Ameren and Ameren Missouri evaluate for impairment the investments held in Ameren Missouri's nuclear decommissioning trust fund. Losses on assets in the trust fund could result in higher funding requirements for decommissioning costs, which Ameren Missouri believes would be recovered in electric rates paid by its customers. Accordingly, Ameren and Ameren Missouri recognize a regulatory asset on their balance sheets for losses on investments held in the nuclear decommissioning trust fund. See Note 9 – Nuclear Decommissioning Trust Fund Investments for additional information.

 

Environmental Costs

Liabilities for environmental costs are recorded on an undiscounted basis when it is probable that a liability has been incurred and the amount of the liability can be reasonably estimated. Costs are expensed or deferred as a regulatory asset when it is expected that the costs will be recovered from customers in future rates. If environmental expenditures are related to facilities currently in use, such as pollution control equipment, the cost is capitalized and depreciated over the expected life of the asset.

Purchased Gas, Power and Fuel Rate-adjustment Mechanisms

Ameren's utility subsidiaries have various rate-adjustment mechanisms in place that provide for the recovery of purchased natural gas and electric fuel and purchased power costs. See Note 2 – Rate and Regulatory Matters for the regulatory assets and liabilities recorded at December 31, 2011, and 2010, related to the rate-adjustment mechanisms discussed below.

In Ameren Missouri's and Ameren Illinois' retail natural gas utility jurisdictions, changes in natural gas costs are generally reflected in billings to their natural gas utility customers through PGA clauses. The difference between actual natural gas costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to natural gas utility customers in a subsequent period.

 

In Ameren Illinois' retail electric utility jurisdictions, changes in purchased power costs are generally reflected in billings to their electric utility customers through pass-through rate-adjustment clauses. The difference between actual purchased power costs and costs billed to customers in a given period are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to electric utility customers in a subsequent period.

Ameren Missouri has a FAC that allows an adjustment of electric rates three times per year for a pass-through to customers of 95% of changes in fuel, emission allowances and purchased power costs, net of off-system revenues, including MISO costs and revenues, greater or less than the amount set in base rates, subject to MoPSC prudency review. The differences between the cost of fuel incurred and the cost of fuel recovered from Ameren Missouri's customers are deferred as regulatory assets or liabilities. The deferred amounts are either billed or refunded to Ameren Missouri's electric utility customers in a subsequent period.

Cash and Cash Equivalents

Cash and cash equivalents include cash on hand and temporary investments purchased with an original maturity of three months or less.

Allowance for Doubtful Accounts Receivable

The allowance for doubtful accounts represents our best estimate of existing accounts receivable that will ultimately be uncollectible. The allowance is calculated by applying estimated loss factors to various classes of outstanding receivables, including unbilled revenue. The loss factors used to estimate uncollectible accounts are based upon both historical collections experience and management's best estimate of future collections success given the existing and anticipated future collections environment. Ameren Illinois has a rate mechanism that adjusts rates for bad debt expense above or below those being collected in rates.

Materials and Supplies

Materials and supplies are recorded at the lower of cost or market. Cost is determined using the average-cost method. Materials and supplies are capitalized as inventory when purchased and then expensed or capitalized as plant assets when installed, as appropriate. The following table presents a breakdown of materials and supplies for each of the Ameren Companies at December 31, 2011, and 2010:

 

     Ameren(a)      Ameren Missouri      Ameren Illinois      Genco  

2011:

           

Fuel(b)

   $ 251       $ 150       $ —         $ 76   

Gas stored underground

     171         22         149         —     

Other materials and supplies

     290         176         50         46   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ 712       $ 348       $ 199       $ 122   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

     Ameren(a)      Ameren Missouri      Ameren Illinois      Genco  

2010:

           

Fuel(b)

   $ 255       $ 152       $ —         $ 81   

Gas stored underground

     175         22         152         —     

Other materials and supplies

     277         167         46         49   
  

 

 

    

 

 

    

 

 

    

 

 

 
   $ 707       $ 341       $ 198       $ 130   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
(b) Consists of coal, oil, paint, propane, and tire chips.

Property and Plant

We capitalize the cost of additions to and betterments of units of property and plant. The cost includes labor, material, applicable taxes, and overhead. An allowance for funds used during construction, as discussed specifically below, is also capitalized as a cost of our rate-regulated assets. Interest incurred during construction is capitalized as a cost of merchant generation assets. Maintenance expenditures, including nuclear refueling and maintenance outages, are expensed as incurred. When units of depreciable property are retired, the original costs, less salvage values, are charged to accumulated depreciation. Asset removal costs incurred by our merchant generation operations that do not constitute legal obligations are expensed as incurred. Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Asset Retirement Obligations below and Note 3 – Property and Plant, Net, for additional information.

Depreciation

Depreciation is provided over the estimated lives of the various classes of depreciable property by applying composite rates on a straight-line basis to the cost basis of such property. The provision for depreciation for the Ameren Companies in 2011, 2010 and 2009 ranged from 3% to 4% of the average depreciable cost.

Goodwill and Intangible Assets

Goodwill. Goodwill represents the excess of the purchase price of an acquisition over the fair value of the net assets acquired. As of December 31, 2011, Ameren's and Ameren Illinois' goodwill related to Ameren's acquisition of IP in 2004 and Ameren's acquisition of CILCORP in 2003.

We evaluate goodwill for impairment as of October 31 of each year, or more frequently if events or changes in circumstances indicate that the asset might be impaired. During the fourth quarter of 2011, Ameren and Ameren Illinois used a qualitative evaluation to assess the likelihood of a goodwill impairment based on authoritative accounting guidance issued by the FASB in 2011. That evaluation led Ameren and Ameren Illinois to believe it was more likely than not that the fair value of each of their reporting units exceeded their carrying values, resulting in no impairment in 2011. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the goodwill impairment recorded in 2010.

Intangible Assets. Ameren, Ameren Missouri and Genco classify emission allowances and renewable energy credits as intangible assets. We evaluate intangible assets for impairment if events or changes in circumstances indicate that their carrying amount might be impaired. See Note 17 – Goodwill, Impairment and Other Charges for additional information including the intangible asset impairments recorded in 2011 and 2010.

At December 31, 2011, Ameren's and Ameren Missouri's intangible assets included renewable energy credits obtained through wind and solar power purchase agreements. The book value of each of Ameren's and Ameren Missouri's renewable energy credits was $7 million and less than $1 million at December 31, 2011, and 2010, respectively.

In July 2011, the EPA issued the CSAPR, which created new allowances for SO2 and NOx emissions, and restricted the use of preexisting SO2 and NOx allowances to the acid rain program and NOx budget trading program, respectively. In anticipation of the CSAPR announcement, observable market prices for existing emission allowances declined materially. Consequently, during 2011, Ameren and Genco recorded a noncash, pretax impairment charge of $2 million and $1 million, respectively, which was reflected in "Goodwill, impairment and other charges" on their statements of income. Ameren Missouri recorded a $1 million impairment of its SO2 emission allowances by reducing a previously established regulatory liability relating to the SO2 emission allowances, which had no impact to earnings. On December 30, 2011, the United States Court of Appeals for the District of Columbia issued a stay of the CSAPR. Until that court proceeding is finalized, the EPA is expected to continue to administer the CAIR and to use CAIR's allowance program for compliance. During 2010, Ameren and Genco each recognized an impairment charge of intangible assets to reduce the carrying value of SO2 emission allowances. The charge was reflected in "Goodwill, impairment and other charges" in their statements of income. See Note 15 – Commitments and Contingencies for additional information on emission allowances and the CSAPR. The book value of each of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was less than $1 million at December 31, 2011. The book value of Ameren's, Ameren Missouri's, and Genco's CAIR emission allowances was $7 million, $2 million, and $3 million, at December 31, 2010, respectively.

Renewable energy credits and emission allowances are charged to purchased power expense and fuel expense, respectively, as they are used in operations. The following table presents amortization expense based on usage of renewable energy credits and emission allowances, net of gains from sales, for Ameren, Ameren Missouri, Ameren Illinois, and Genco during the years ended December 31, 2011, 2010, and 2009. The table below does not include the intangible asset impairment charges referenced above.

 

Impairment of Long-lived Assets

We evaluate long-lived assets classified as held and used for impairment when events or changes in circumstances indicate that the carrying value of such assets may not be recoverable. Whether impairment has occurred is determined by comparing the estimated undiscounted cash flows attributable to the assets with the carrying value of the assets. If the carrying value exceeds the undiscounted cash flows, we recognize an impairment charge equal to the carrying value of the assets in excess of estimated fair value. In the period in which we determine an asset meets the held for sale criteria, we record an impairment charge to the extent the book value exceeds its fair value less cost to sell. See Note 17 – Goodwill, Impairment and Other Charges for information about Ameren's, Ameren Missouri's and Genco's impairments.

Unamortized Debt Discount, Premium, and Expense

Discount, premium, and expense associated with long-term debt are amortized over the lives of the related issues.

Revenue

Operating Revenues

Ameren Missouri, Ameren Illinois and Genco record operating revenue for electric or natural gas service when it is delivered to customers. We accrue an estimate of electric and natural gas revenues for service rendered but unbilled at the end of each accounting period.

Trading Activities

We present the revenues and costs associated with certain energy derivative contracts designated as trading on a net basis in "Operating Revenues – Electric" and "Operating Revenues – Other."

Nuclear Fuel

Ameren Missouri's cost of nuclear fuel is capitalized and then amortized to fuel expense on a unit-of-production basis. Spent fuel disposal cost is based on net kilowatthours generated and sold, and that cost is charged to expense.

 

Accounting for MISO Transactions

MISO-related purchase and sale transactions are recorded by Ameren, Ameren Missouri and Ameren Illinois using settlement information provided by MISO. These purchase and sale transactions are accounted for on a net hourly position. We record net purchases in a single hour in "Operating Expenses – Purchased power" and net sales in a single hour in "Operating Revenues – Electric" in our statements of income. On occasion, prior-period transactions will be resettled outside the routine settlement process because of a change in MISO's tariff or a material interpretation thereof. In these cases, Ameren, Ameren Missouri and Ameren Illinois recognize expenses associated with resettlements once the resettlement is probable and the resettlement amount can be estimated.

Stock-based Compensation

Stock-based compensation cost is measured at the grant date based on the fair value of the award. Ameren recognizes as compensation expense the estimated fair value of stock-based compensation on a straight-line basis over the requisite service period. See Note 12 – Stock-based Compensation for additional information.

Excise Taxes

Excise taxes imposed on us are reflected on Ameren Missouri customer electric bills and on Ameren Missouri and Ameren Illinois customer natural gas bills. They are recorded gross in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" on the statement of income. Excise taxes reflected on Ameren Illinois electric customer bills are imposed on the consumer and are therefore not included in revenues and expenses. They are recorded as tax collections payable and included in "Taxes accrued" on the balance sheet. The following table presents excise taxes recorded in "Operating Revenues – Electric", "Operating Revenues – Gas" and "Operating Expenses – Taxes other than income taxes" for the years ended 2011, 2010 and 2009:

 

      2011      2010      2009  

Ameren Missouri

   $     137       $     130       $     112   

Ameren Illinois

     57         59         56   

Ameren

   $ 194       $ 189       $ 168   

Income Taxes

Ameren uses an asset and liability approach for its financial accounting and reporting of income taxes, in

accordance with authoritative accounting guidance. Deferred tax assets and liabilities are recognized for transactions that are treated differently for financial reporting and income tax return purposes. These deferred tax assets and liabilities are based on statutory tax rates.

We recognize that regulators will probably reduce future revenues for deferred tax liabilities that were initially recorded at rates in excess of the current statutory rate. Therefore, reductions in the deferred tax liability, which were recorded because of decreases in the statutory rate, have been credited to a regulatory liability. A regulatory asset has been established to recognize the probable recovery in rates of future income taxes, resulting principally from the reversal of allowance for funds used during construction. This refers to equity and temporary differences related to property and plant acquired before 1976 that were unrecognized temporary differences prior to the adoption of the authoritative accounting guidance for income taxes.

Investment tax credits used on tax returns for prior years have been deferred for book purposes; the credits are being amortized over the useful lives of the related investment. Deferred income taxes were recorded on the temporary difference represented by the deferred investment tax credits and a corresponding regulatory liability. This recognizes the expected reduction in rate revenue for future lower income taxes associated with the amortization of the investment tax credits. See Note 13 – Income Taxes.

Ameren Missouri, Ameren Illinois and Genco are parties to a tax sharing agreement with Ameren that provides for the allocation of consolidated tax liabilities. The tax sharing agreement specifies that each party be allocated an amount of tax similar to that which would be owed had the party been separately subject to tax. Any net benefit attributable to the parent is reallocated to other members. That allocation is treated as a contribution of capital to the party receiving the benefit.

Noncontrolling Interests

Ameren's noncontrolling interests comprised the 20% of EEI not owned by Ameren and the preferred stock not subject to mandatory redemption of Ameren's subsidiaries. These noncontrolling interests are classified as a component of equity separate from Ameren's equity in its consolidated balance sheet. Genco's noncontrolling interest comprised the 20% of EEI not owned by Genco. This noncontrolling interest is classified as a component of equity separate from Genco's equity in its consolidated balance sheet.

Earnings per Share

There were no material differences between Ameren's basic and diluted earnings per share amounts in 2011, 2010, and 2009. The number of stock options, restricted stock shares, and performance share units outstanding was immaterial. There were no assumed stock option conversions in 2009 and 2010, as the remaining stock options were not dilutive. All of Ameren's stock options expired in February 2010.

Asset Retirement Obligations

Authoritative accounting guidance requires us to record the estimated fair value of legal obligations associated with the retirement of tangible long-lived assets in the period in which the liabilities are incurred and to capitalize a corresponding amount as part of the book value of the related long-lived asset. In subsequent periods, we are required to make adjustments to AROs based on changes in the estimated fair values of the obligations. Corresponding increases in asset book values are depreciated over the remaining useful life of the related asset. Uncertainties as to the probability, timing, or amount of cash flows associated with AROs affect our estimates of fair value. Ameren, Ameren Missouri and Genco have recorded AROs for retirement costs associated with Ameren Missouri's Callaway energy center decommissioning costs, asbestos removal, ash ponds, and river structures. In addition, Ameren, Ameren Missouri and Ameren Illinois have recorded AROs for the disposal of certain transformers.

Asset removal costs accrued by our rate-regulated operations that do not constitute legal obligations are classified as a regulatory liability. See Note 2 – Rate and Regulatory Matters.

 

The following table provides a reconciliation of the beginning and ending carrying amount of AROs for the years 2011 and 2010:

 

      Ameren Missouri(a)     Ameren Illinois(b)     Genco      AERG     Ameren(a)  

Balance at December 31, 2009

   $     331      $      5      $     65       $     33      $     434   

Liabilities incurred

     5        (c     3         -        8   

Liabilities settled

     (4     (c     (c      (c     (4

Accretion in 2010(d)

     19        1        4         2        26   

Change in estimates(e)

     12        (3     2         (c     11   

Balance at December 31, 2010

   $ 363      $ 3      $ 74       $ 35      $ 475   

Liabilities incurred

     -        -        (c      -        (c

Liabilities settled

     (1     (c     (2      (c     (3

Accretion in 2011(d)

     20        (c     5         2        27   

Change in estimates(f)

     (54     (c     (6      (6     (66

Balance at December 31, 2011

   $ 328      $ 3      $ 71 (g)     $ 31      $ 433 (g) 

 

(a) The nuclear decommissioning trust fund assets of $357 million and $337 million as of December 31, 2011, and 2010, respectively, were restricted for decommissioning of the Callaway energy center.
(b) Balance included in "Other deferred credits and liabilities" on the balance sheet.
(c) Less than $1 million.
(d) Accretion expense was recorded as an increase to regulatory assets at Ameren Missouri and Ameren Illinois.
(e) Ameren Missouri and Genco changed their estimates for asbestos removal. Additionally, Genco changed the estimates related to retirement costs for its coal combustion byproduct storage areas.
(f) Ameren Missouri changed estimates related to its Callaway energy center decommissioning costs because of a cost study performed in 2011 and a decline in the cost escalation factor assumptions. Additionally, Ameren Missouri, Genco and AERG changed estimates related to retirement costs for asbestos removal, river structures and their coal combustion byproduct storage areas.
(g) Balance included $5 million in "Other current liabilities" on the balance sheet as of December 31, 2011.

Summary Of Significant Accounting Policies (Tables)
          2011              2010              2009      

Ameren

     8% - 9         8% - 9         6% - 9   

Ameren Missouri

     8             8             6       

Ameren Illinois

     9             9             9       
      2011      2010      2009  

Ameren Missouri

   $     137       $     130       $     112   

Ameren Illinois

     57         59         56   

Ameren

   $ 194       $ 189       $ 168   
      Ameren Missouri(a)     Ameren Illinois(b)     Genco      AERG     Ameren(a)  

Balance at December 31, 2009

   $     331      $      5      $     65       $     33      $     434   

Liabilities incurred

     5        (c     3         -        8   

Liabilities settled

     (4     (c     (c      (c     (4

Accretion in 2010(d)

     19        1        4         2        26   

Change in estimates(e)

     12        (3     2         (c     11   

Balance at December 31, 2010

   $ 363      $ 3      $ 74       $ 35      $ 475   

Liabilities incurred

     -        -        (c      -        (c

Liabilities settled

     (1     (c     (2      (c     (3

Accretion in 2011(d)

     20        (c     5         2        27   

Change in estimates(f)

     (54     (c     (6      (6     (66

Balance at December 31, 2011

   $ 328      $ 3      $ 71 (g)     $ 31      $ 433 (g) 

 

(a) The nuclear decommissioning trust fund assets of $357 million and $337 million as of December 31, 2011, and 2010, respectively, were restricted for decommissioning of the Callaway energy center.
(b) Balance included in "Other deferred credits and liabilities" on the balance sheet.
(c) Less than $1 million.
(d) Accretion expense was recorded as an increase to regulatory assets at Ameren Missouri and Ameren Illinois.
(e) Ameren Missouri and Genco changed their estimates for asbestos removal. Additionally, Genco changed the estimates related to retirement costs for its coal combustion byproduct storage areas.
(f) Ameren Missouri changed estimates related to its Callaway energy center decommissioning costs because of a cost study performed in 2011 and a decline in the cost escalation factor assumptions. Additionally, Ameren Missouri, Genco and AERG changed estimates related to retirement costs for asbestos removal, river structures and their coal combustion byproduct storage areas.
(g) Balance included $5 million in "Other current liabilities" on the balance sheet as of December 31, 2011.
Rate And Regulatory Matters (Tables)
Schedule Of Regulatory Assets And Liabilities
      2011           2010  
     Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

          Ameren(a)     

Ameren

Missouri

    

Ameren

Illinois

 

Current regulatory assets:

                   

Under-recovered FAC(b)(c)

   $ 83       $ 83       $ -         $ 158       $ 158       $ -   

Under-recovered Illinois electric power costs(b)(d)

     4         -         4           4         -         4   

Under-recovered PGA(b)(d)

     8         5         3           2         -         2   

MTM derivative losses(e)

     120         21         299             103         21         254   

Total current regulatory assets

   $ 215       $ 109       $ 306           $ 267       $ 179       $ 260   

Noncurrent regulatory assets:

                   

Pension and postretirement benefit costs(f)

   $ 878       $ 382       $ 496         $ 555       $ 251       $ 304   

Income taxes(g)

     239         234         5           230         225         5   

Asset retirement obligation(h)

     6         -         6           9         3         6   

Callaway costs(b)(i)

     48         48         -           51         51         -   

Unamortized loss on reacquired debt(b)(j)

     47         21         26           53         25         28   

Recoverable costs – contaminated facilities(k)

     102         -         102           127         -         127   

MTM derivative losses(e)

     100         13         87           85         14         249   

SO2 emission allowances sale tracker(l)

     6         6         -           12         12         -   

Storm costs(m)

     16         16         -           23         23         -   

Demand-side costs(n)

     70         70         -           39         39         -   

Reserve for workers' compensation liabilities(o)

     13         7         6           14         8         6   

Credit facilities fees(p)

     10         10         -           12         12         -   

Employee separation costs(q)

     6         3         3           8         6         2   

Common stock issuance costs(r)

     10         10         -           12         12         -   

Construction accounting for pollution control equipment(b)(s)

     25         25         -           4         4         -   

Other(t)

     27         10         17             29         9         20   

Total noncurrent regulatory assets

   $     1,603       $     855       $     748           $     1,263       $     694       $     747   

Current regulatory liabilities:

                   

Over-recovered FAC(u)

   $ 12       $ 12       $ -         $ -       $ -       $ -   

Over-recovered Illinois electric power costs(d)

     66         -         66           62         -         62   

Over-recovered PGA(d)

     9         -         9           12         1         11   

MTM derivative gains(v)

     46         45         1             25         22         3   

Total current regulatory liabilities

   $ 133       $ 57       $ 76           $ 99       $ 23       $ 76   

Noncurrent regulatory liabilities:

                   

Income taxes(w)

   $ 48       $ 44       $ 4         $ 54       $ 48       $ 6   

Removal costs(x)

     1,269         719         550           1,177         655         522   

Asset retirement obligation(h)

     29         29         -           -         -         -   

MTM derivative gains(v)

     82         4         78           20         13         7   

Bad debt rider(y)

     10         -         10           5         -         5   

Pension and postretirement benefit costs tracker(z)

     38         38         -           45         45         -   

Energy efficiency rider(aa)

     24         -         24           13         -         13   

Other(bb)

     2         2         -             5         5         -   

Total noncurrent regulatory liabilities

   $ 1,502       $ 836       $ 666           $ 1,319       $ 766       $ 553   

 

(a) Includes intercompany eliminations.
(b) These assets earn a return.
(c) Under-recovered fuel costs for periods from July 2009 through December 2011. Specific accumulation periods aggregate the under-recovered costs over four months, any related adjustments occur over the following four months, and then recovery from customers occurs over the next eight months.
(d) Costs under- or over-recovered from utility customers. Amounts will be recovered from, or refunded to, customers within one year of the deferral.
(e) Deferral of commodity-related derivative MTM losses, as well as the MTM losses on financial contracts entered into by Ameren Illinois with Marketing Company.
(f) These costs are being amortized in proportion to the recognition of prior service costs (credits), transition obligations (assets), and actuarial losses (gains) attributable to Ameren's pension plan and postretirement benefit plans. See Note 11 – Retirement Benefits for additional information.
(g) Offset to certain deferred tax liabilities for expected recovery of future income taxes when paid. See Note 13 – Income Taxes for amortization period.
(h) Recoverable or refundable removal costs for AROs at our rate-regulated operations, including net realized and unrealized gains and losses related to the nuclear decommissioning trust fund investments. See Note 1 – Summary of Significant Accounting Policies – Asset Retirement Obligations.
(i) Ameren Missouri's Callaway energy center operations and maintenance expenses, property taxes, and carrying costs incurred between the plant in-service date and the date the plant was reflected in rates. These costs are being amortized over the remaining life of the plant's current operating license (through 2024).
(j) Losses related to reacquired debt. These amounts are being amortized over the lives of the related new debt issuances or the remaining lives of the old debt issuances if no new debt was issued.
(k) The recoverable portion of accrued environmental site liabilities, primarily collected from electric and natural gas customers through ICC-approved cost recovery riders. The period of recovery will depend on the timing of actual expenditures. See Note 15 – Commitments and Contingencies for additional information.
(l)

A regulatory tracking mechanism for gains on sales of SO2 emission allowances, net of SO2 premiums incurred under the terms of coal procurement contracts, plus any SO2 discounts received under such contracts, as approved in a MoPSC order. The MoPSC's May 2010 electric rate order discontinued any future deferrals under this tracking mechanism. The MoPSC's July 2011 rate order approved the amortization of these costs through July 2013.

(m) Actual storm costs in a test year that exceed the MoPSC staff's normalized storm costs for rate purposes. The 2006 storm costs are being amortized until July 2013. The 2008 storm costs are being amortized over five years, beginning on March 1, 2009. In addition, the balance includes January 2007 ice storm costs that Ameren Missouri will recover over five years, beginning in March 2009, as approved by the January 2009 MoPSC electric rate order. The 2009 storm costs are being amortized over five years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order.
(n) Demand-side costs, including the costs of developing, implementing and evaluating customer energy efficiency and demand response programs. Costs incurred from May 2008 through September 2008 are being amortized over 10 years, beginning in March 2009. Costs incurred from October 2008 through December 2009 are being amortized over six years, beginning in July 2010. Costs incurred from January 2010 through February 2011 are being amortized over six years, beginning in August 2011. The amortization period for the costs incurred after February 2011 will be determined in Ameren Missouri's pending electric rate case.
(o) Reserve for workers' compensation claims.
(p) Ameren Missouri's costs incurred to enter into and maintain the 2009 multiyear and supplemental credit agreements, prior to their termination in 2010. These costs are being amortized over two years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order. These costs are being amortized to construction work in progress, which will be subsequently depreciated when assets are placed into service.
(q) Cost incurred for the voluntary and involuntary separation programs. The 2009 Ameren Missouri-related costs are being amortized over three years, beginning in July 2010, as approved by the May 2010 MoPSC electric rate order. The 2009 Ameren Illinois-related costs are being amortized over three years, beginning in May 2010, as approved by the April 2010 ICC electric and natural gas rate order.
(r) The MoPSC's May 2010 electric rate order allowed Ameren Missouri to recover its portion of Ameren's September 2009 common stock issuance costs. These costs are being amortized over five years, beginning in July 2010.
(s) The MoPSC's May 2010 electric rate order allowed Ameren Missouri to continue recording an allowance for funds used during construction for pollution control equipment at its Sioux energy center until the cost of that equipment is placed in customer rates. The amortization of these costs will be over the expected life of the Sioux energy center.
(t) Includes costs related to Ameren Illinois' delivery service rate cases that resulted in orders in 2008 and 2010 as well as the natural gas delivery service rate case that resulted in an order in January 2012. The natural gas costs associated with the 2008 rate case will be amortized until September 2013. The 2010 rate case costs are being amortized over a two-year period, beginning in May 2010. The 2012 natural gas rate case costs will be amortized over a two year period, beginning in January 2012. The Ameren Illinois total also includes a portion of the unamortized debt fair value adjustment recorded upon Ameren's acquisition of IP. This portion is being amortized over the remaining life of the related debt, beginning with the expiration of the electric rate freeze in Illinois on January 1, 2007. The Ameren Illinois total also includes Ameren Illinois Merger integration and optimization costs. These costs will be amortized over four years, beginning in January 2012. At Ameren Missouri, the balance includes cost associated with the retirement of renewable energy credits and solar rebates to fulfill Ameren Missouri's renewable energy portfolio requirement. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case. The Ameren Missouri balance also includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2011 through December 2011 were more than the amount allowed in base rates. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case.
(u) Over-recovered fuel costs from March 2009 through September 2009 as ordered by the MoPSC in April 2011. Customer refunds will conclude in May 2012.
(v) Deferral of commodity-related derivative MTM gains.
(w) Unamortized portion of investment tax credit and federal excess deferred taxes. See Note 13 – Income Taxes for amortization period.
(x) Estimated funds collected for the eventual dismantling and removal of plant from service, net of salvage value, upon retirement related to our rate-regulated operations. See discussion in Note 1 – Summary of Significant Accounting Policies – Asset Retirement Obligations.
(y) A regulatory tracking mechanism for the difference between the level of bad debt expense incurred by Ameren Illinois under GAAP and the level of such costs included in electric and natural gas rates. The over-recovery relating to 2010 is being refunded to customers from June 2011 through May 2012. The over-recovery relating to 2011 will be refunded to customers from June 2012 through May 2013.
(z)

A regulatory tracking mechanism for the difference between the level of pension and postretirement benefit costs incurred by Ameren Missouri under GAAP and the level of such costs built into electric rates. The 2008 costs are being amortized through February 2014. The 2009 costs are being amortized through June 2015. The 2010 costs assigned to the natural gas and electric businesses are being amortized through February 2016 and July 2016, respectively. The 2011 costs will be determined in Ameren Missouri's pending electric rate case.

(aa) A regulatory tracking mechanism that allows Ameren Illinois to recover its electric and natural gas costs associated with developing, implementing and evaluating customer energy efficiency and demand response programs. This over-recovery will be refunded to customers over the following 12 months after the plan year.
(bb) Balance includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2010 through February 2011 were less than the amount allowed in base rates. The over-recovery incurred during that time period is being amortized over three years beginning in August 2011. The balance also includes the deferral of gains on emission allowance vintage swaps Ameren Missouri entered into during 2005. The balance of this gain was immaterial at the end of 2011.
Property And Plant, Net (Tables)
Short-Term Debt And Liquidity (Tables)
Long-Term Debt And Equity Financings (Tables)
Other Income And Expenses (Tables)
Other Income And Expenses
Derivative Financial Instruments (Tables)
Fair Value Measurements (Tables)
Nuclear Decommissioning Trust Fund Investments (Tables)
     2011      2010      2009  

Proceeds from sales

   $ 199       $ 256       $ 380   

Gross realized gains

     5         5         5   

Gross realized losses

     4         4         10   
     Cost      Fair Value  

Less than 5 years

   $ 57       $ 59   

5 years to 10 years

     34         36   

Due after 10 years

     23         26   
  

 

 

    

 

 

 

Total

   $ 114       $ 121   
  

 

 

    

 

 

 
Retirement Benefits (Tables)
        Pension Benefits      Postretirement Benefits  
        2011      2010      2011      2010  

Discount rate at measurement date

       4.50      5.25      4.50      5.25

Increase in future compensation

       3.50         3.50         3.50         3.50   

Medical cost trend rate (initial)

       -         -         5.50         6.00   

Medical cost trend rate (ultimate)

       -         -         5.00         5.00   

Years to ultimate rate

       -         -         10 year         2 years   
             Percentage of Plan Assets at December  31,  

Asset

Category

  

Target Allocation

2012

    2011     2010  

Pension Plan:

      

Cash and cash equivalents

       0  - 5       2     1

Equity securities:

      

U.S. large capitalization

     29 - 39        33        31   

U.S. small and mid-capitalization

       2 - 12        7        11   

International and emerging markets

       9 - 19        11        15   

Total equity

     50 - 60        51        57   

Debt securities

     35 - 45        42        37   

Real estate

       0 - 9          4        4   

Private equity

       0 - 4          1        1   

Total

             100     100

Postretirement Plans:

      

Cash and cash equivalents

       0 - 10     4     4

Equity securities:

      

U.S. large capitalization

     33 - 43        38        39   

U.S. small and mid-capitalization

       3 - 13        8        10   

International

     10 - 20        13        14   

Total equity

     55 - 65        59        63   

Debt securities

     30 - 40        37        33   

Total

             100     100
    

Beginning

Balance at

January 1,

   

Actual Return on

Plan Assets Related

to Assets Still Held

at the Reporting Date

   

Actual Return on

Plan Assets Related

to Assets Sold

During the Period

   

Purchases,

Sales, and

Settlements, net

   

Net
Transfers
into (out of)

of Level 3

   

Ending Balance at

December 31,

 

2011:

           

Real estate

  $ 98      $ 10      $ -      $     -      $     -      $     108   

Private equity

    28        (10     11        (6     -        23   

2010:

           

Other debt securities

  $ 1      $     -      $     -      $ (1   $ -      $ -   

Real estate

        90        7        -        1        -        98   

Private equity

    33        (5     7        (7     -        28   
      Pension Benefits     Postretirement Benefits  
      Ameren(a)     Ameren(a)  

Regulatory assets:

    

Transition obligation

   $ -      $ 2   

Prior service cost (credit)

     (1     (4

Net actuarial loss

     87        23   

Accumulated OCI:

    

Transition obligation

     -        -   

Prior service cost (credit)

     (1     (1

Net actuarial loss

     6        3   

Total

   $     91      $     23   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
      Pension Costs      Postretirement Costs  
      2011      2010      2009      2011      2010      2009  

Ameren(a)

   $     80       $     65       $     81       $     25       $     21       $     34   

Ameren Missouri

     51         42         50         11         11         15   

Ameren Illinois

     16         10         14         11         7         16   

Genco

     8         9         11         3         2         3   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.
      Pension Benefits      Postretirement Benefits  
      Paid from
Qualified
Trust
     Paid from
Company
Funds
     Paid from
Qualified
Trust
     Paid from
Company
Funds
     Federal
Subsidy
 

2012

     223         3         68         3         5   

2013

     225         3         71         3         5   

2014

     230         3         74         3         5   

2015

     231         3         77         3         6   

2016

     232         3         80         3         6   

2017 - 2021

     1,167         12         443         14         32   
      Pension Benefits     Postretirement Benefits  
      2011     2010     2009     2011     2010     2009  

Discount rate at measurement date

     5.25     5.75     5.75     5.25     5.75     5.75

Expected return on plan assets

     8.00        8.00        8.00        7.75        8.00        8.00   

Increase in future compensation

     3.50        3.50        4.00        3.50        3.50        4.00   

Medical cost trend rate (initial)

     -        -        -        6.00        6.50        7.00   

Medical cost trend rate (ultimate)

     -        -        -        5.00        5.00        5.00   

Years to ultimate rate

     -        -        -        2 years        3 years        4 years   
      Pension Benefits      Postretirement Benefits  
      Service Cost
and Interest
Cost
    Projected
Benefit
Obligation
     Service Cost
and Interest
Cost
    Postretirement
Benefit
Obligation
 

0.25% decrease in discount rate

   $ (2   $ 110       $ -      $ 38   

0.25% increase in salary scale

     2        14         -        -   

1.00% increase in annual medical trend

     -        -         3        42   

1.00% decrease in annual medical trend

     -        -         (3     (41
      2011      2010      2009  

Ameren(a)

   $ 28       $ 27       $ 24   

Ameren Missouri

     16         16         14   

Ameren Illinois

     8         8         7   

Genco

     2         1         2   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries.

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 31       $ -       $ 31   

Equity securities:

          

U.S. large capitalization

     72        922         -         994   

U.S. small and mid-capitalization

     202        11         -         213   

International and emerging markets

     115        213         -         328   

Debt securities:

          

Corporate bonds

     -        720         -         720   

Municipal bonds

     -        176         -         176   

U.S. treasury and agency securities

     -        230         -         230   

Other

     -        121         -         121   

Real estate

     -        -         108         108   

Private equity

     -        -         23         23   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     389      $     2,424       $     131       $     2,944   

Less: Medical benefit assets at December 31(a)

             (91

Plus: Net receivables at December 31(b)

                               23   

Fair value of pension plans assets at year end

                             $ 2,876   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 20       $ -       $ 20   

Equity securities:

          

U.S. large capitalization

     70        812         -         882   

U.S. small and mid-capitalization

     299        10         -         309   

International and emerging markets

     129        284         -         413   

Debt securities:

          

Corporate bonds

     -        646         -         646   

Municipal bonds

     -        129         -         129   

U.S. treasury and agency securities

     -        154         -         154   

Other

     -        100         -         100   

Real estate

     -        -         98         98   

Private equity

     -        -         28         28   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     498      $     2,155       $     126       $     2,779   

Less: Medical benefit assets at December 31(a)

             (85

Plus: Net receivables at December 31(b)

                               28   

Fair value of pension plans assets at year end

                             $ 2,722   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.
     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 31       $ -       $ 31   

Equity securities:

          

U.S. large capitalization

     72        922         -         994   

U.S. small and mid-capitalization

     202        11         -         213   

International and emerging markets

     115        213         -         328   

Debt securities:

          

Corporate bonds

     -        720         -         720   

Municipal bonds

     -        176         -         176   

U.S. treasury and agency securities

     -        230         -         230   

Other

     -        121         -         121   

Real estate

     -        -         108         108   

Private equity

     -        -         23         23   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     389      $     2,424       $     131       $     2,944   

Less: Medical benefit assets at December 31(a)

             (91

Plus: Net receivables at December 31(b)

                               23   

Fair value of pension plans assets at year end

                             $ 2,876   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the pension plan assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

   

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -      $ 20       $ -       $ 20   

Equity securities:

          

U.S. large capitalization

     70        812         -         882   

U.S. small and mid-capitalization

     299        10         -         309   

International and emerging markets

     129        284         -         413   

Debt securities:

          

Corporate bonds

     -        646         -         646   

Municipal bonds

     -        129         -         129   

U.S. treasury and agency securities

     -        154         -         154   

Other

     -        100         -         100   

Real estate

     -        -         98         98   

Private equity

     -        -         28         28   

Derivative assets

     1        -         -         1   

Derivative liabilities

     (1     -         -         (1

Total

   $     498      $     2,155       $     126       $     2,779   

Less: Medical benefit assets at December 31(a)

             (85

Plus: Net receivables at December 31(b)

                               28   

Fair value of pension plans assets at year end

                             $ 2,722   

 

(a) Medical benefit (health and welfare) component for accounts maintained in accordance with Section 401(h) of the Internal Revenue Code (401(h) accounts) to fund a portion of the postretirement obligation.
(b) Receivables related to pending security sales, offset by payables related to pending security purchases.

 

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ 1       $ 66       $ -       $ 67   

Equity securities:

           

U.S. large capitalization

         235         78         -         313   

U.S. small and mid-capitalization

     57         -         -         57   

International

     44         56         -         100   

Debt securities:

           

Corporate bonds

     -         61         -         61   

Municipal bonds

     -         86         -         86   

U.S. treasury and agency securities

     -         82         -         82   

Asset-backed securities

     -         23         -         23   

Other

     -         49         -         49   

Total

   $ 337       $     501       $     -       $     838   

Plus: Medical benefit assets at December 31(a)

              91   

Less: Net payables at December 31(b)

                                (33

Fair value of postretirement benefit plans assets at year end

                              $ 896   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2010:

 

     

Quoted Prices in

Active Markets for

Identified Assets

(Level 1)

    

Significant Other

Observable Inputs

(Level 2)

    

Significant Other

Unobservable
Inputs

(Level 3)

     Total  

Cash and cash equivalents

   $ -       $ 35       $ -       $ 35   

Equity securities:

           

U.S. large capitalization

         215         72         -         287   

U.S. small and mid-capitalization

     66         -         -         66   

International

     43         51         -         94   

Debt securities:

           

Corporate bonds

     -         59         -         59   

Municipal bonds

     -         58         -         58   

U.S. treasury and agency securities

     -         59         -         59   

Asset-backed securities

     -         31         -         31   

Other

     -         29         -         29   

Total

   $ 324       $     394       $     -       $     718   

Plus: Medical benefit assets at December 31(a)

              85   

Less: Net payables at December 31(b)

                                (6

Fair value of postretirement benefit plans assets at year end

                              $ 797   

 

(a) Medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.
   Quoted Prices  in
Active Markets for
Identified Assets
(Level 1)
     Significant  Other
Observable Inputs
(Level 2)
     Significant  Other
Unobservable
Inputs

(Level 3)
     Total  

Cash and cash equivalents

   $ 1       $ 66       $ —         $ 67   

Equity securities:

           

U.S. large capitalization

     235         78         —           313   

U.S. small and mid-capitalization

     57         —           —           57   

International

     44         56         —           100   

Debt securities:

           

Corporate bonds

     —           61         —           61   

Municipal bonds

     —           86         —           86   

U.S. treasury and agency securities

     —           82         —           82   

Asset-backed securities

     —           23         —           23   

Other

     —           49         —           49   
  

 

 

    

 

 

    

 

 

    

 

 

 

Total

   $ 337       $ 501       $ —         $ 838 (a)(b) 
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(a) Excludes $91 million of medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Excludes $33 million of payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.

The following table sets forth, by level within the fair value hierarchy discussed in Note 8 – Fair Value Measurements, the postretirement benefit plans assets measured at fair value as of December 31, 2010:

 

     Quoted Prices  in
Active Markets for
Identified Assets
(Level 1)
     Significant  Other
Observable Inputs
(Level 2)
     Significant  Other
Unobservable
Inputs

(Level 3)
     Total  

Cash and cash equivalents

   $ —         $ 35       $ —         $ 35   

Equity securities:

           

U.S. large capitalization

     215         72         —           287   

U.S. small and mid-capitalization

     66         —           —           66   

International

     43         51         —           94   

Debt securities:

           

Corporate bonds

     —           59         —           59   

Municipal bonds

     —           58         —           58   

U.S. treasury and agency securities

     —           59         —           59   

Asset-backed securities

     —           31         —           31   

Other

     —           29         —           29   
  

 

 

    

 

 

    

 

 

    

 

 

 

Total

   $ 324       $ 394       $ —         $ 718 (a)(b) 
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(a) Excludes $85 million of medical benefit (health and welfare) component for 401(h) accounts to fund a portion of the postretirement obligation. These 401(h) assets are included in the pension plan assets shown above.
(b) Excludes $6 million of payables related to pending security purchases, offset by Medicare, interest receivables, and receivables related to pending security sales.
Stock-Based Compensation (Tables)
Summary Of Nonvested Shares Related To Long-Term Incentive Plan
Income Taxes (Tables)
     Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Current taxes:

        

Federal

   $ (27   $ 3      $ (24   $ (21

State

     (5     2        (4     (7

Deferred taxes:

        

Federal

     273        129        123        43   

State

     76        31        34        18   

Deferred investment tax credits, amortization

     (7     (4     (2     (1

Total income tax expense

   $ 310      $ 161      $ 127      $ 32   

2010:

        

Current taxes:

        

Federal

   $ 13      $ (14   $ (20   $ (5

State

     10        (15     (5     6   

Deferred taxes:

        

Federal

     274        206        132        22   

State

     36        27        32        (2

Deferred investment tax credits, amortization

     (8     (5     (2     (1

Total income tax expense

   $ 325      $ 199      $ 137      $ 20   

2009:

        

Current taxes:

        

Federal

   $ (73   $ (117   $ (8   $ 22   

State

     3        (31     14        14   

Deferred taxes:

        

Federal

     337        239        64        57   

State

     74        42        11        9   

Deferred investment tax credits, amortization

     (9     (5     (2     (1

Total income tax expense

   $ 332      $ 128      $ 79      $ 101   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.

 

      Ameren(a)     Ameren Missouri     Ameren Illinois     Genco  

2011:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,811      $ 2,134      $ 1,003      $ 457   

Deferred intercompany tax gain/basis step-up

     3        (1     55        (54

Regulatory assets, net

     73        73        -        -   

Deferred employee benefit costs

     (367     (88     (109     (67

Purchase accounting

     35        -        (27     15   

ARO

     (37     -        1        (25

Other

     (223     6        (86     (22

Total net accumulated deferred income tax liabilities(b)

   $ 3,295      $ 2,124      $ 837      $ 304   

2010:

        

Accumulated deferred income taxes, net liability (asset):

        

Plant related

   $ 3,310      $ 1,974      $ 750      $ 378   

Deferred intercompany tax gain/basis step-up

     2        (2     71        (68

Regulatory assets (liabilities), net

     67        68        (1     -   

Deferred employee benefit costs

     (360     (87     (124     (45

Purchase accounting

     106        -        41        17   

ARO

     (48     (9     1        (27

Other

     (120     7        (57     10   

Total net accumulated deferred income tax liabilities(c)

   $ 2,957      $ 1,951      $ 681      $ 265   

 

(a) Includes amounts for Ameren registrant and nonregistrant subsidiaries and intercompany eliminations.
(b) Includes $20 million, $8 million and $58 million as current assets recorded in the balance sheet for Ameren, Ameren Missouri and Ameren Illinois, respectively.
(c) Includes $43 million as current assets recorded in the balance sheet for Ameren Illinois. Includes $71 million, $43 million and $12 million as current liabilities recorded in the balance sheets for Ameren, Ameren Missouri and Genco, respectively
      Ameren     Ameren Missouri     Ameren Illinois     Genco  

Unrecognized tax benefits – January 1, 2009

   $     110      $                     20      $ -      $ 48   

Increases based on tax positions prior to 2009

     90        76        -        9   

Decreases based on tax positions prior to 2009

     (84     (19     -        (31

Increases based on tax positions related to 2009

     19        11        -        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2009

   $ 135      $ 88      $ -      $ 29   

Increases based on tax positions prior to 2010

     72        40        27        4   

Decreases based on tax positions prior to 2010

     (38     (12     (2     (16

Increases based on tax positions related to 2010

     77        48        31        3   

Changes related to settlements with taxing authorities

     -        -        -        -   

Decreases related to the lapse of statute of limitations

     -        -        -        -   

Unrecognized tax benefits – December 31, 2010

   $ 246      $ 164      $ 56      $     20   

Increases based on tax positions prior to 2011

     22        15        -        1   

Decreases based on tax positions prior to 2011

     (125     (63     (41     (12

Increases based on tax positions related to 2011

     17        13        -        1   

Changes related to settlements with taxing authorities

     (10     (5     (4     -   

Decreases related to the lapse of statute of limitations

     (2     -        -        (1

Unrecognized tax benefits – December 31, 2011

   $ 148      $ 124      $     11      $ 9   

Total unrecognized tax benefits (detriments) that, if recognized, would affect the effective tax rates as of December 31, 2009

   $ 6      $ 3      $ -      $ -   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2010

   $ -      $ 3      $ -      $ 1   

Total unrecognized tax benefits that, if recognized, would affect the effective tax rates as of December 31, 2011

   $ 1      $ 1      $ -      $ 1   
      Ameren    

Ameren

Missouri

   

Ameren

Illinois

    Genco  

Liability for interest – January 1, 2009

   $ 10      $ 2      $ -      $ 4   

Interest charges (income) for 2009

     (2     2        -        (2

Liability for interest – December 31, 2009

   $ 8      $ 4      $ -      $ 2   

Interest charges for 2010

     9        6        2        -   

Liability for interest – December 31, 2010

   $ 17      $     10      $ 2      $ 2   

Interest income for 2011

     (11     (3     (1     (1

Interest payment

     (1     (1     -        -   

Liability for interest – December 31, 2011

   $     5      $ 6      $     1      $     1   
Commitments And Contingencies (Tables)
Goodwill, Impairment And Other Charges (Tables)

Ameren

 

     2011      2010  
     Ameren
Illinois
     Ameren
Illinois
     Merchant
Generation
     Total(a)  

Gross goodwill at January 1

   $ 411       $ 411       $ 420       $ 831   

Accumulated impairment losses

     —           —           —           —     

Goodwill, net of accumulated impairment losses

   $ 411       $ 411       $ 420       $ 831   

Impairment losses during year

     —           —           420         420   
  

 

 

    

 

 

    

 

 

    

 

 

 

Goodwill, net of impairment losses at December 31

   $ 411       $ 411       $ —         $ 411   
  

 

 

    

 

 

    

 

 

    

 

 

 

 

(a) Includes amounts for Ameren registrants and nonregistrant subsidiaries.
Segment Information (Tables)
Schedule Of Segment Reporting Information, By Segment
   Ameren
Missouri
    

Ameren

Illinois

Regulated

Segment

    

Merchant

Generation

    Other    

Intersegment

Eliminations

    Consolidated  

2011

              

External revenues

   $ 3,358       $      2,774       $      1,394      $ 5      $ -      $ 7,531   

Intersegment revenues

     25         13         235        4        (277     -   

Depreciation and amortization

     408         215         143        19        -        785   

Interest and dividend income

     30         1         -        44        (43     32   

Interest charges

     209         136         105        44        (43     451   

Income taxes (benefit)

     161         127         32        (10                 -        310   

Net income (loss) attributable to Ameren Corporation(a)

     287         193         45        (6     -        519   

Capital expenditures

     550         351         153        (24 )(b)      -        1,030   

Total assets

         12,757         7,213         3,833        1,211        (1,369         23,645   

2010

              

External revenues

   $ 3,176       $ 3,002       $ 1,459      $ 1      $ -      $ 7,638   

Intersegment revenues

     21         12         234        13        (280     -   

Depreciation and amortization

     382         210         146        27        -        765   

Interest and dividend income

     31         1         1        25        (25     33   

Interest charges

     213         143         133        35        (27     497   

Income taxes (benefit)

     199         137         6        (17     -        325   

Net income (loss) attributable to Ameren Corporation(a)

     364         208         (409     (24     -        139   

Capital expenditures

     624         281         101        36        -        1,042   

Total assets

     12,504         7,406         3,934        1,354        (1,687     23,511   

2009

              

External revenues

   $ 2,847       $ 2,957       $ 1,322      $ 9      $ -      $ 7,135   

Intersegment revenues

     27         27         390        19        (463     -   

Depreciation and amortization

     357         216         126        26        -        725   

Interest and dividend income

     29         6         -        33        (38     30   

Interest charges

     229         153         119        48        (41     508   

Income taxes (benefit)

     128         79         151        (26     -        332   

Net income (loss) attributable to Ameren Corporation(a)

     259         127         247        (21     -        612   

Capital expenditures

     882         352         408        68        -        1,710   

Total assets

     12,219         7,181         4,751        1,814        (2,263     23,702   

 

(a) Represents net income (loss) available to common stockholders.
(b) Includes the elimination of intercompany transfers.
Selected Quarterly Information (Tables)
Summary Of Selected Quarterly Information
Summary Of Significant Accounting Policies (Narrative) (Details) (USD $)
12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2010
Emission Allowances [Member]
Dec. 31, 2011
Ameren Energy Generating Company [Member]
Dec. 31, 2010
Ameren Energy Generating Company [Member]
Feb. 29, 2012
Medina Valley Energy Center [Member]
Jun. 30, 2011
Columbia CT Energy Center [Member]
Jun. 30, 2010
Columbia CT Energy Center [Member]
Dec. 31, 2011
Shutdown Of Meredosia And Hutsonville Energy Centers [Member]
Dec. 31, 2010
Merchant Generation Separation Program [Member]
Dec. 31, 2009
Voluntary And Involuntary Separation Program [Member]
Dec. 31, 2011
Other Asset Sales [Member]
Ameren Energy Generating Company [Member]
Dec. 31, 2011
Voluntary Separation Offer [Member]
Dec. 31, 2011
SO2 Emission Allowances [Member]
Merchant Generation [Member]
Dec. 31, 2011
SO2 Emission Allowances [Member]
Ameren Missouri [Member]
Dec. 31, 2011
Minimum [Member]
Dec. 31, 2010
Minimum [Member]
Dec. 31, 2009
Minimum [Member]
Dec. 31, 2011
Maximum [Member]
Dec. 31, 2010
Maximum [Member]
Dec. 31, 2009
Maximum [Member]
Summary Of Significant Accounting Policies [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pretax impairment charge
$ 2,000,000 1
$ 68,000,000 1
 
 
 
 
 
 
 
 
 
 
 
 
$ 2,000,000 
$ 1,000,000 
 
 
 
 
 
 
Impairment charge on goodwill
 
420,000,000 1 2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Book value
7,000,000 
7,000,000 
 
7,000,000 
 
3,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Unrecognized tax benefits that would impact effective tax rate
1,000,000 
 
6,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage of EEI not owned by Ameren
20.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percent of property sold
 
 
 
 
 
 
 
 
25.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
Proceeds from sale
 
 
 
 
 
 
 
45,000,000 
18,000,000 
 
 
 
4,000,000 
 
 
 
 
 
 
 
 
 
Pretax gain recognized on sale
 
 
 
 
 
 
 
8,000,000 
5,000,000 
 
 
 
4,000,000 
 
 
 
 
 
 
 
 
 
Percent of average depreciable cost
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3.00% 
3.00% 
3.00% 
4.00% 
4.00% 
4.00% 
Proceeds from sales of properties
53,000,000 
27,000,000 
2,000,000 
 
49,000,000 
18,000,000 
16,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Additional contingent proceeds from sale of properties
 
 
 
 
 
 
1,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Pretax charge to earnings in connection with the retirement of two generating units at its Meredosia power plant and for related obsolete inventory
 
 
4,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number of employee positions eliminated
 
 
 
 
 
 
 
 
 
90 
 
300 
 
340 
 
 
 
 
 
 
 
 
Severance costs
 
 
 
 
 
 
 
 
 
$ 4,000,000 
$ 4,000,000 
$ 17,000,000 
 
$ 28,000,000 
 
 
 
 
 
 
 
 
Summary Of Significant Accounting Policies (Schedule Of Material And Supplies) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Summary Of Significant Accounting Policies [Abstract]
 
 
Fuel
$ 251 1 2
$ 255 1 2
Gas stored underground
171 1
175 1
Other materials and supplies
290 1
277 1
Total materials and supplies
$ 712 1
$ 707 1
Summary Of Significant Accounting Policies (Schedule Of Rates Used For Allowance For Funds Used During Construction) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Minimum [Member]
 
 
 
Allowance for funds used during construction, rate
8.00% 
8.00% 
6.00% 
Maximum [Member]
 
 
 
Allowance for funds used during construction, rate
9.00% 
9.00% 
9.00% 
Summary Of Significant Accounting Policies (Schedule Of Amortization Expense) (Details) (Emission Allowances [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Emission Allowances [Member]
 
 
 
Amortization expense
$ 6 1
$ 35 1
$ 40 1
Summary Of Significant Accounting Policies (Schedule Of Excise Taxes) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Summary Of Significant Accounting Policies [Abstract]
 
 
 
Excise tax expense
$ 194 
$ 189 
$ 168 
Summary Of Significant Accounting Policies (Schedule Of Asset Retirement Obligations) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Summary Of Significant Accounting Policies [Abstract]
 
 
Balance
$ 475 1
$ 434 1
Liabilities incurred
 
1
Liabilities settled
(3)1
(4)1
Accretion in period
27 1 2
26 1 2
Change in estimates
(66)1 3
11 1 4
Balance
433 1 5
475 1
Nuclear decommissioning trust fund
357 
337 
Asset retirement obligation included in other current liabilities
$ 5 
 
Rate And Regulatory Matters (Narrative) (Details) (USD $)
12 Months Ended 1 Months Ended 60 Months Ended 0 Months Ended 0 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Jun. 30, 2010
FERC Relicensing [Member]
Taum Sauk Energy Center [Member]
Dec. 31, 2011
Approved By FERC And MISO [Member]
Potential Transmission Project Investments 2012 Through 2016 [Member]
Dec. 31, 2011
Approved By FERC And MISO [Member]
Potential Transmission Project Investments Through 2019 [Member]
Oct. 28, 2011
MoPSC Staff Recommendation [Member]
FAC Prudence Review [Member]
Subsequent Periods After September 30, 2009 [Member]
Dec. 31, 2011
Ameren Missouri [Member]
Renewable Energy Portfolio Requirement [Member]
Apr. 30, 2011
Ameren Missouri [Member]
FAC Prudence Review [Member]
Sep. 30, 2011
Ameren Missouri [Member]
FAC Prudence Review [Member]
months
Sep. 30, 2011
Ameren Missouri [Member]
FAC Prudence Review [Member]
Subsequent Periods After September 30, 2009 [Member]
Dec. 31, 2005
Ameren Missouri [Member]
Pending FERC Case [Member]
Power Purchase Agreement With Entergy Arkansas [Member]
Dec. 31, 2011
Ameren Missouri [Member]
2009 Final Rate Order [Member]
Electric Distribution [Member]
Jul. 13, 2011
Ameren Missouri [Member]
Final Rate Order [Member]
Electric Distribution [Member]
May 31, 2010
Ameren Missouri [Member]
Final Rate Order [Member]
Electric Distribution [Member]
Feb. 3, 2012
Ameren Missouri [Member]
Pending Rate Order [Member]
Electric Distribution [Member]
Jan. 20, 2012
Ameren Missouri [Member]
Pending Rate Order [Member]
MEEIA Filing [Member]
Electric Distribution [Member]
Dec. 31, 2011
Ameren Illinois Company [Member]
Dec. 31, 2010
Ameren Illinois Company [Member]
Dec. 31, 2009
Ameren Illinois Company [Member]
Jan. 31, 2011
Ameren Illinois Company [Member]
Wholesale Distribution Rate Case [Member]
Dec. 31, 2011
Ameren Illinois Company [Member]
IEIMA [Member]
Requirements [Member]
Dec. 31, 2010
Ameren Illinois Company [Member]
Final Rate Order [Member]
Electric And Gas Distribution [Member]
Jan. 31, 2012
Ameren Illinois Company [Member]
Final Rate Order [Member]
Gas Distribution [Member]
Jan. 3, 2012
Ameren Illinois Company [Member]
Initial Filing [Member]
IEIMA [Member]
Electric Distribution [Member]
Dec. 31, 2011
Callaway Unit 2 [Member]
Rate And Regulatory Matters [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Authorized increase in revenue from utility service
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 173,000,000 
$ 230,000,000 
 
 
 
 
 
 
 
$ 40,000,000 
$ 32,000,000 
 
 
Amount held by Circuit Court based on appeal of electric rate order
 
 
 
 
 
 
 
 
 
 
 
 
20,000,000 
 
15,000,000 
 
 
 
 
 
 
 
 
 
 
 
Number of industrial customers who received a stay from Circuit Court
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Increase in normalized net fuel costs
 
 
 
 
 
 
 
 
 
 
 
 
 
52,000,000 
 
103,000,000 
 
 
 
 
 
 
 
 
 
 
Utility revenue increase requested
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
376,000,000 
81,000,000 
 
 
 
11,000,000 
 
 
 
 
 
Rate of return on common equity
 
 
 
 
 
 
 
 
 
 
 
 
 
10.20% 
 
10.75% 
 
 
 
 
 
 
 
9.06% 
 
 
Percent of capital structure composed of equity
 
 
 
 
 
 
 
 
 
 
 
 
 
52.20% 
 
52.00% 
 
 
 
 
 
 
 
53.30% 
 
 
Rate base
 
 
 
 
 
 
 
 
 
 
 
 
 
6,600,000,000 
 
6,800,000,000 
 
 
 
 
 
 
 
1,000,000,000 
 
 
Recovery and refund period
 
 
 
 
 
 
 
 
 
 
 
 
 
12 months to eight months 
 
 
 
 
 
 
 
 
 
 
 
 
Energy Efficiency program spending
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
145,000,000 
 
 
 
 
 
 
 
 
 
Number of years energy efficiency spending will occur
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Sharing level for FAC
 
 
 
 
 
 
 
 
 
 
 
 
 
95.00% 
 
 
 
 
 
 
 
 
 
 
 
 
Request to defer fixed costs not recovered from Noranda, amount
 
 
 
 
 
 
 
 
 
36,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Time required to complete FAC prudence reviews, in months
 
 
 
 
 
 
 
 
 
18 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage of electric native load sales required to be purchased or generated from renewable energy sources minimum
 
 
 
 
 
 
 
2.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage of electric native load sales required to be purchased or generated from renewable energy sources by 2021
 
 
 
 
 
 
 
15.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage limitation on customer rate increases attributed to renewable energy source requirements
 
 
 
 
 
 
 
1.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Percentage of each portfolio requirement that must be derived from solar energy
 
 
 
 
 
 
 
2.00% 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Authorized decrease in revenue from utility service
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
19,000,000 
 
Excess basis points over treasury year one
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
590 
 
 
 
 
Excess basis points over treasury after year one
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
580 
 
 
 
 
Collar basis points
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
50 
 
 
 
 
The first three years' maximum basis point penalty
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
30 
 
 
 
 
The middle four years' maximum basis point penalty
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
34 
 
 
 
 
The last four years' maximum basis point penalty
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
38 
 
 
 
 
Maximum residential rate increase allowed on an annual basis under IEIMA
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
2.50% 
 
 
 
 
Incremental capital expenditure requirement
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
625,000,000 
 
 
 
 
New jobs created requirement
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
450 
 
 
 
 
Annual contribution for customer assistance programs
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1,000,000 
 
 
 
 
One-Time contribution to a science and energy innovation trust
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
7,500,000 
 
 
 
 
Annual contribution to a science and energy innovation trust
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
1,000,000 
 
 
 
 
Purchased power
966,000,000 
1,106,000,000 
909,000,000 
 
 
 
 
 
 
 
 
25,000,000 
 
 
 
 
 
853,000,000 
965,000,000 
1,048,000,000 1
 
 
 
 
 
 
Current regulatory liabilities
133,000,000 2
99,000,000 
 
 
 
 
26,000,000 
 
18,000,000 
 
 
 
 
 
 
 
 
76,000,000 
76,000,000 
 
 
 
 
 
 
 
Interest charges
451,000,000 
497,000,000 
508,000,000 
 
 
 
 
 
1,000,000 
 
 
 
 
 
 
 
 
136,000,000 
143,000,000 
153,000,000 1
 
 
 
 
 
 
Pretax earnings recognized associated with sales contracts
215,000,000 2
267,000,000 
 
 
 
 
 
 
 
 
25,000,000 
 
 
 
 
 
 
306,000,000 
260,000,000 
 
 
 
 
 
 
 
Capital investments
 
 
 
 
750,000,000 
1,200,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Number of years an ESP is valid for
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
20 
Capitalized costs relating to construction of new nuclear unit
18,127,000,000 3 4
17,853,000,000 3 4
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4,770,000,000 
4,576,000,000 
 
 
 
 
 
 
69,000,000 
Number of years for proposed relicensing application filed with FERC
 
 
 
40 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Disallowed capitalized costs associated with rebuilt Taum Sauk energy center
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 89,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
Rate And Regulatory Matters (Schedule Of Regulatory Assets And Liabilities) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory assets
$ 215 1
$ 267 
Noncurrent regulatory assets
1,603 1
1,263 
Current regulatory liabilities
133 1
99 
Noncurrent regulatory liabilities
1,502 1
1,319 
Under-Recovered FAC [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory assets
83 1 2 3
158 2 3
Under-Recovered Illinois Electric Power Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory assets
1 2 4
2 4
Under-Recovered PGA [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory assets
1 2 4
2 4
MTM Derivative Losses [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory assets
120 1 5
103 5
Noncurrent regulatory assets
100 1 5
85 5
Pension And Postretirement Benefit Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
878 1 6
555 6
Income Taxes [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
239 1 7
230 7
Noncurrent regulatory liabilities
48 1 8
54 8
Asset Retirement Obligation [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
1 9
9
Noncurrent regulatory liabilities
29 1 9
 
Callaway Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
48 1 10 2
51 10 2
Unamortized Loss On Reacquired Debt [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
47 1 11 2
53 11 2
Recoverable Costs Contaminated Facilities [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
102 1 12
127 12
SO2 Emission Allowances Sale Tracker [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
1 13
12 13
Storm Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
16 1 14
23 14
Demand-Side Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
70 1 15
39 15
Reserve For Workers' Compensation Liabilities [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
13 1 16
14 16
Bad Debt Rider [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory liabilities
10 1 13
13
Credit Facilities Fees [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
10 1 17
12 17
Employee Separation Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
1 18
18
Common Stock Issuance Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
10 1 19
12 19
Construction Accounting For Pollution Control Equipment [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
25 1 2 20
2 20
Other [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory assets
27 1 21
29 21
Noncurrent regulatory liabilities
1 22
22
Over-Recovered FAC [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory liabilities
12 1 23
 
Over-Recovered Illinois Electric Power Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory liabilities
66 1 4
62 4
Over-Recovered PGA [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory liabilities
1 4
12 4
MTM Derivative Gains [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Current regulatory liabilities
46 1 24
25 24
Noncurrent regulatory liabilities
82 1 24
20 24
Removal Costs [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory liabilities
1,269 1 25
1,177 25
Pension And Postretirement Benefit Costs Tracker [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory liabilities
38 1 26
45 26
Energy Efficiency Rider [Member]
 
 
Rate And Regulatory Matters [Line Items]
 
 
Noncurrent regulatory liabilities
$ 24 1 27
$ 13 27
[21] Includes costs related to Ameren Illinois' delivery service rate cases that resulted in orders in 2008 and 2010 as well as the natural gas delivery service rate case that resulted in an order in January 2012. The natural gas costs associated with the 2008 rate case will be amortized until September 2013. The 2010 rate case costs are being amortized over a two-year period, beginning in May 2010. The 2012 natural gas rate case costs will be amortized over a two year period, beginning in January 2012. The Ameren Illinois total also includes a portion of the unamortized debt fair value adjustment recorded upon Ameren's acquisition of IP. This portion is being amortized over the remaining life of the related debt, beginning with the expiration of the electric rate freeze in Illinois on January 1, 2007. The Ameren Illinois total also includes Ameren Illinois Merger integration and optimization costs. These costs will be amortized over four years, beginning in January 2012. At Ameren Missouri, the balance includes cost associated with the retirement of renewable energy credits and solar rebates to fulfill Ameren Missouri's renewable energy portfolio requirement. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case. The Ameren Missouri balance also includes a regulatory tracking mechanism for the difference between the level of vegetation management and infrastructure inspection costs incurred by Ameren Missouri under GAAP and the level of such costs included in electric rates. Ameren Missouri's vegetation management and infrastructure inspection costs from July 2011 through December 2011 were more than the amount allowed in base rates. The amortization period for these costs will be determined in Ameren Missouri's pending electric rate case.
Property And Plant, Net (Schedule Of Property And Plant, Net) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Property and plant, at original cost
$ 26,468 1 2
$ 26,154 1 2
Accumulated depreciation and amortization
9,429 1 2
9,194 1 2
Property and plant, before construction work in progress
17,039 1 2
16,960 1 2
Property and Plant, Net
18,127 1 2
17,853 1 2
Capital lease agreements, gross asset value
229 
228 
Total accumulated depreciation, capital lease agreements
52 
46 
Electric [Member]
 
 
Property and plant, at original cost
24,256 1 2
24,069 1 2
Gas [Member]
 
 
Property and plant, at original cost
1,746 1 2
1,661 1 2
Other Energy [Member]
 
 
Property and plant, at original cost
466 1 2
424 1 2
Construction work in progress
833 1 2
634 1 2
Nuclear Fuel [Member]
 
 
Construction work in progress
$ 255 1 2
$ 259 1 2
Property And Plant, Net (Accrued Capital Expenditures) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Property And Plant, Net [Abstract]
 
 
 
Accrued capital expenditures
$ 107 1
$ 79 1
$ 143 1
Short-Term Debt And Liquidity (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Ameren Revolving Credit Facility [Member]
Dec. 31, 2010
Ameren Revolving Credit Facility [Member]
Jun. 2, 2010
Ameren Revolving Credit Facility [Member]
Dec. 31, 2011
Multiyear Credit Facility [Member]
Dec. 31, 2011
2010 Missouri Credit Agreement [Member]
Dec. 31, 2010
2010 Missouri Credit Agreement [Member]
Sep. 10, 2010
2010 Missouri Credit Agreement [Member]
Dec. 31, 2011
2010 Genco Credit Agreement [Member]
Dec. 31, 2010
2010 Genco Credit Agreement [Member]
Sep. 10, 2010
2010 Genco Credit Agreement [Member]
Dec. 31, 2011
2010 Illinois Credit Agreement [Member]
Sep. 10, 2010
2010 Illinois Credit Agreement [Member]
Dec. 31, 2011
Commercial Paper [Member]
Dec. 31, 2010
Commercial Paper [Member]
Dec. 31, 2011
2010 Credit Agreements [Member]
Line of Credit Facility [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Commercial paper maximum issuance
 
 
 
 
 
 
 
 
 
 
 
 
$ 500 
 
 
Line of credit facility, maximum borrowing capacity
 
 
20 
2,100 
500 
 
800 
500 
 
500 
300 
800 
 
 
1,900 
Number of lenders
 
 
 
25 
 
 
 
 
 
 
 
 
 
 
 
Line of credit facility, maximum borrowing capacity, per lender
 
 
 
125 
 
 
 
 
 
 
 
 
 
 
 
Commercial paper outstanding
 
 
 
 
 
 
 
 
 
 
 
 
148 
269 
 
Reductions of borrowing capacity of letters of credit issued
 
 
 
15 
 
 
 
 
 
 
 
 
 
 
 
Average daily commercial paper borrowings outstanding
 
 
 
 
 
 
 
 
 
 
 
 
311 
185 
 
Average daily borrowings outstanding
20 
20 
 
 
105 
195 
 
41 
90 
 
 
 
 
 
 
Weighted average interest rate
2.48% 
2.54% 
 
 
 
 
 
 
 
 
 
 
0.87% 
0.94% 
 
Optional increase to facility size, maximum amount
 
 
 
 
1,000 
 
 
625 
 
 
1,000 
 
 
 
 
Letters of credit portion of aggregate commitment
 
 
 
25.00% 
 
 
 
 
 
 
 
 
 
 
 
Debt instrument, interest rate, effective percentage
 
 
2.25% 
 
 
 
 
 
 
 
 
 
 
 
 
Peak short-term borrowings
 
 
 
 
 
 
 
 
 
 
 
 
435 
366 
 
Peak short-term borrowings interest rate
 
 
 
 
 
 
 
 
 
 
 
 
1.46% 
 
 
Maximum consolidated indebtedness as a percent of total capitalization
 
 
 
65.00% 
 
 
 
 
 
 
 
 
 
 
 
Allowable debt default amount
 
 
 
$ 25 
 
 
 
 
 
 
 
 
 
 
 
Actual debt-to-capital ratio
 
 
 
47 
 
 
 
 
 
 
 
 
 
 
 
Minimum ratio of consolidated funds from operations plus interest expense to consolidated interest expense as of balance sheet date
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Current ratio of consolidated funds from operations plus interest expense to consolidated interest expense as of balance sheet date
 
 
 
5.1 to 1.0 
 
 
 
 
 
 
 
 
 
 
 
2.0to 1.0
Short-Term Debt And Liquidity (Borrowing Activity On Credit Agreements) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Line of Credit Facility [Line Items]
 
 
Peak credit facility borrowings
$ 460 
$ 925 
2010 Missouri Credit Agreement [Member]
 
 
Line of Credit Facility [Line Items]
 
 
Average daily borrowings outstanding
105 
195 
Outstanding credit facility borrowings at period end
 
340 
Weighted-average interest rate
2.30% 
2.31% 
Peak credit facility borrowings
340 
380 
Peak interest rate
4.30% 
2.31% 
2010 Genco Credit Agreement [Member]
 
 
Line of Credit Facility [Line Items]
 
 
Average daily borrowings outstanding
41 
90 
Outstanding credit facility borrowings at period end
 
100 
Weighted-average interest rate
2.30% 
2.31% 
Peak credit facility borrowings
$ 100 
$ 385 
Peak interest rate
2.31% 
2.31% 
Short-Term Debt And Liquidity (Schedule Of Maximum Aggregate Amount Available On Credit Agreements) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Sep. 10, 2010
2010 Missouri Credit Agreement [Member]
 
 
Line of credit facility, maximum borrowing capacity
$ 500 
$ 800 
2010 Genco Credit Agreement [Member]
 
 
Line of credit facility, maximum borrowing capacity
500 
500 
2010 Illinois Credit Agreement [Member]
 
 
Line of credit facility, maximum borrowing capacity
$ 300 
$ 800 
Long-Term Debt And Equity Financings (Narrative) (Details) (USD $)
12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended 1 Months Ended 12 Months Ended 1 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Senior Unsecured Notes 8.875% Due 2014 [Member]
Sep. 30, 2010
Series 7.69% Due 2036 [Member]
Nov. 30, 2010
Senior Notes Series D 8.35% Due 2010 [Member]
Jun. 30, 2011
Senior Secured Notes 6.625% Due 2011 [Member]
Aug. 31, 2010
Series Preferred Stock $7.64 [Member]
Dec. 31, 2011
401 (K) [Member]
Dec. 31, 2010
401 (K) [Member]
Dec. 31, 2009
401 (K) [Member]
Dec. 31, 2011
DRPlus [Member]
Dec. 31, 2011
Union Electric Company [Member]
Dec. 31, 2010
Union Electric Company [Member]
Dec. 31, 2011
Union Electric Company [Member]
Senior Secured Notes 8.45% Due 2039 [Member]
Aug. 31, 2010
Union Electric Company [Member]
Series Preferred Stock $7.64 [Member]
Sep. 30, 2010
Ameren Illinois Company [Member]
Dec. 31, 2011
Ameren Illinois Company [Member]
Dec. 31, 2010
Ameren Illinois Company [Member]
Dec. 31, 2011
Ameren Illinois Company [Member]
Senior Notes Series I 6.30% Due 2020 [Member]
Dec. 31, 2011
Ameren Illinois Company [Member]
Senior Secured Notes 6.625% Due 2011 [Member]
Aug. 31, 2010
Ameren Illinois Company [Member]
Series Preferred Stock 4.50% [Member]
Aug. 31, 2010
Ameren Illinois Company [Member]
Series Preferred Stock 4.64% [Member]
Feb. 28, 2010
CILCORP [Member]
Dec. 31, 2011
Ameren Energy Generating Company [Member]
Dec. 31, 2010
Ameren Energy Generating Company [Member]
Dec. 31, 2011
Ameren Energy Generating Company [Member]
Senior Notes Series I 6.30% Due 2020 [Member]
Dec. 31, 2010
Ameren Energy Generating Company [Member]
Senior Notes Series I 6.30% Due 2020 [Member]
Long-Term Debt And Equity Financings [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Preferred stock, authorized
100,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Preferred stock, par value
$ 0.01 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 7.64 
 
 
 
 
 
 
 
 
 
 
 
 
Preferred stock, shares outstanding
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
111,264 
 
 
 
 
 
 
Common stock, shares issued
2,200,000 
3,000,000 
25,100,000 
 
 
 
 
 
2,200,000 
3,000,000 
3,200,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Common stock, value of shares issued
$ 65,000,000 
$ 80,000,000 
$ 634,000,000 
 
 
 
 
 
$ 65,000,000 
$ 80,000,000 
$ 82,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Debt instrument face amount
 
 
 
 
66,000,000 
 
 
33,000,000 
 
 
 
 
 
 
 
 
40,000,000 
 
 
 
 
 
 
 
 
 
250,000,000 
250,000,000 
Stated interest rate on debt instrument
 
 
 
8.875% 
7.69% 
8.35% 
6.625% 
 
 
 
 
 
 
 
8.45% 
 
 
 
 
6.30% 
6.625% 
 
 
 
 
 
 
 
Debt instrument maturity year
 
 
 
2014 
 
 
 
 
 
 
 
 
 
 
2039 
 
 
 
 
2020 
2011 
 
 
 
 
 
 
 
Common stock, shares authorized
400,000,000 
400,000,000 
 
 
 
 
 
 
 
 
 
6,000,000 
150,000,000 
150,000,000 
 
 
 
45,000,000 
45,000,000 
 
 
 
 
 
10,000 
10,000 
 
 
Contributed capital
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
33,000,000 
 
 
 
 
 
 
 
 
 
 
 
Repayments of senior debt
 
 
 
 
 
 
150,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Amount of senior notes matured and retired
 
 
 
 
 
200,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Principle amount outstanding
 
 
 
 
 
 
 
 
 
 
 
 
3,955,000,000 
3,960,000,000 
 
 
 
1,666,000,000 
1,816,000,000 
 
 
 
 
 
825,000,000 
825,000,000 
 
 
Fair-market value adjustments
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
5,000,000 
5,000,000 
 
 
 
 
 
 
 
 
 
Value of cash and securities deposited for covenant defeasance
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
3,000,000 
 
 
 
 
Number of preferred stock shares redeemed
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
79,940 
 
 
 
 
 
Preferred stock, redemption price per share
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 100.85 
 
 
 
 
 
$ 110 
$ 102 
 
 
 
 
 
Redemption price debt instrument
 
 
 
 
102.692% 
 
 
 
 
 
 
 
 
 
 
 
101.52% 
 
 
 
 
 
 
 
 
 
 
 
Dividend rate on preferred shares, percentage
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
4.50% 
4.64% 
 
 
 
 
 
Excess in indebtedness upon default of maturity
 
 
 
$ 25,000,000 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-Term Debt And Equity Financings (Schedule Of Long-Term Debt Outstanding) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Debt Instrument [Line Items]
 
 
 
Less: Unamortized discount and premium
$ (1,000,000)
 
 
Less: Maturities due within one year
(179,000,000)
(155,000,000)
 
Long-term debt, net
6,677,000,000 
6,853,000,000 
 
Series 7.69% Due 2036 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
 
 
66,000,000 
Parent Company [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Less: Unamortized discount and premium
(1,000,000)
(2,000,000)
 
Long-term debt, net
424,000,000 
423,000,000 
 
Parent Company [Member] |
Senior Unsecured Notes 8.875% Due 2014 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
425,000,000 
425,000,000 
 
Union Electric Company [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Long-term debt, gross
3,955,000,000 
3,960,000,000 
 
Less: Unamortized discount and premium
(5,000,000)
(6,000,000)
 
Less: Maturities due within one year
(178,000,000)
(5,000,000)
 
Long-term debt, net
3,772,000,000 
3,949,000,000 
 
Union Electric Company [Member] |
City Of Bowling Green Capital Lease Peno Creek Ct [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Capital lease obligations
69,000,000 
74,000,000 
 
Union Electric Company [Member] |
Audrain County Capital Lease Audrain County Ct [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Capital lease obligations
240,000,000 
240,000,000 
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.25% Due 2012 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
173,000,000 1
173,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 4.65% Due 2013 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
200,000,000 1
200,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.50% Due 2014 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
104,000,000 1
104,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 4.75% Due 2015 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
114,000,000 1
114,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.40% Due 2016 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
260,000,000 1
260,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.40% Due 2017 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
425,000,000 1
425,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.00% Due 2018 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
250,000,000 1 2
250,000,000 1 2
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.10% Due 2018 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
200,000,000 1
200,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.70% Due 2019 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
450,000,000 1 2
450,000,000 1 2
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.10% Due 2019 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
300,000,000 1
300,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.00% Due 2020 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
85,000,000 1
85,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.50% Due 2034 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
184,000,000 1
184,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 5.30% Due 2037 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
300,000,000 1
300,000,000 1
 
Union Electric Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 8.45% Due 2039 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
350,000,000 1 2
350,000,000 1 2
 
Union Electric Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series 1992 Due 2022 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
47,000,000 3 4
47,000,000 3 4
 
Union Electric Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series 1993 5.45% Due 2028 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
44,000,000 4
44,000,000 4
 
Union Electric Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series A 1998 Due 2033 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
60,000,000 3 5
60,000,000 3 5
 
Union Electric Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series B 1998 Due 2033 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
50,000,000 3 5
50,000,000 3 5
 
Union Electric Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series C 1998 Due 2033 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
50,000,000 3 5
50,000,000 3 5
 
Ameren Illinois Company [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
 
 
40,000,000 
Fair-market value adjustments
5,000,000 
5,000,000 
 
Long-term debt, gross
1,666,000,000 
1,816,000,000 
 
Less: Unamortized discount and premium
(8,000,000)
(9,000,000)
 
Less: Maturities due within one year
(1,000,000)
(150,000,000)
 
Long-term debt, net
1,657,000,000 
1,657,000,000 
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.625% Due 2011 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
 
150,000,000 
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 8.875% Due 2013 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
150,000,000 6 7
150,000,000 6 7
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.20% Due 2016 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
54,000,000 6
54,000,000 6
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.25% Due 2016 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
75,000,000 8
75,000,000 8
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.125% Due 2017 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
250,000,000 7 9
250,000,000 7 9
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.25% Due 2018 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
337,000,000 7 9
337,000,000 7 9
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 9.75% Due 2018 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
400,000,000 7 9
400,000,000 7 9
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.125% Due 2028 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
60,000,000 9
60,000,000 9
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.70% Due 2036 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
61,000,000 9
61,000,000 9
 
Ameren Illinois Company [Member] |
First Mortgage [Member] |
Senior Secured Notes 6.70% Due 2036 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
42,000,000 6
42,000,000 6
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series1992 B 6.20% Due 2012 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
1,000,000 6
1,000,000 6
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series A 2000 5.50% Due 2014 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
51,000,000 
51,000,000 
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series1993 5.90% Due 2023 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
32,000,000 6
32,000,000 6
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series1994A 5.70% Due 2024 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
36,000,000 10
36,000,000 10
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series C-1 1993 5.95% Due 2026 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
35,000,000 
35,000,000 
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series C-2 1993 5.70% Due 2026 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
8,000,000 
8,000,000 
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series B-1 1993 Due 2028 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
17,000,000 3
17,000,000 3
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series1998A 5.40% Due 2028 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
19,000,000 10
19,000,000 10
 
Ameren Illinois Company [Member] |
Environmental Improvement And Pollution Control Revenue Bonds [Member] |
Series1998B 5.40% Due 2028 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
33,000,000 10
33,000,000 10
 
Ameren Energy Generating Company [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Long-term debt, gross
825,000,000 
825,000,000 
 
Less: Unamortized discount and premium
(1,000,000)
(1,000,000)
 
Long-term debt, net
824,000,000 
824,000,000 
 
Ameren Energy Generating Company [Member] |
Senior Notes Series F 7.95% Due 2032 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
275,000,000 
275,000,000 
 
Ameren Energy Generating Company [Member] |
Senior Notes Series H 7.00% Due 2018 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
300,000,000 
300,000,000 
 
Ameren Energy Generating Company [Member] |
Senior Notes Series I 6.30% Due 2020 [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Debt instrument face amount
250,000,000 
250,000,000 
 
Ameren Missouri [Member]
 
 
 
Debt Instrument [Line Items]
 
 
 
Less: Unamortized discount and premium
$ (5,000,000)
 
 
[1] These notes are collaterally secured by first mortgage bonds issued by Ameren Missouri under the UE mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any first mortgage bonds issued under the UE mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Based on the Ameren Missouri first mortgage bonds and senior secured notes currently outstanding, and assuming no early retirement of any series of such securities in full, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2039.
[6] These notes are collaterally secured by first mortgage bonds issued by Ameren Illinois under the CILCO mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the CILCO mortgage indenture remain outstanding. Redemption, purchase, or maturity of all first mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the first mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Based on the CILCO first mortgage bonds and senior secured notes currently outstanding, and assuming no early retirement of any series of such securities in full, we do not expect the first mortgage bond lien protection associated with these notes to fall away until 2023.
[8] These notes are collaterally secured by mortgage bonds issued by Ameren Illinois under the Ameren Illinois mortgage indenture. The notes have a fall-away lien provision and will remain secured only as long as any series of first mortgage bonds issued under the Ameren Illinois mortgage indenture remain outstanding. Redemption, purchase, or maturity of all mortgage bonds, including first mortgage bonds currently outstanding and any that may be issued in the future, would result in a release of the mortgage bonds currently securing these notes, at which time these notes would become unsecured obligations. Based on the Ameren Illinois mortgage bonds and senior secured notes currently outstanding, and assuming no early retirement of any series of such securities in full, we do not expect the mortgage bond lien protection associated with these notes to fall away until 2028.
Long-Term Debt And Equity Financings (Schedule Of Long-Term Debt Outstanding) (Parenthetical) (Details)
12 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Senior Unsecured Notes 8.875% Due 2014 [Member]
Dec. 31, 2011
Senior Secured Notes 5.25% Due 2012 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 4.65% Due 2013 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.50% Due 2014 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 4.75% Due 2015 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.40% Due 2016 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.40% Due 2017 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.00% Due 2018 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.10% Due 2018 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.70% Due 2019 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.10% Due 2019 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.00% Due 2020 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.50% Due 2034 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 5.30% Due 2037 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Senior Secured Notes 8.45% Due 2039 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Series 1992 Due 2022 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Series 1993 5.45% Due 2028 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Series A 1998 Due 2033 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Series B 1998 Due 2033 [Member]
Union Electric Company [Member]
Dec. 31, 2011
Series C 1998 Due 2033 [Member]
Union Electric Company [Member]
Sep. 30, 2010
Series 7.69% Due 2036 [Member]
Jun. 30, 2011
Senior Secured Notes 6.625% Due 2011 [Member]
Dec. 31, 2011
Senior Secured Notes 6.625% Due 2011 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 8.875% Due 2013 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.20% Due 2016 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.25% Due 2016 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.125% Due 2017 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.25% Due 2018 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 9.75% Due 2018 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.125% Due 2028 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.70% Due 2036 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Secured Notes 6.70% Due 2036 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series1992 B 6.20% Due 2012 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series A 2000 5.50% Due 2014 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series1993 5.90% Due 2023 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series1994A 5.70% Due 2024 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series C-1 1993 5.95% Due 2026 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series C-2 1993 5.70% Due 2026 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series B-1 1993 Due 2028 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series1998A 5.40% Due 2028 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Series1998B 5.40% Due 2028 [Member]
Ameren Illinois Company [Member]
Nov. 30, 2010
Senior Notes Series D 8.35% Due 2010 [Member]
Dec. 31, 2011
Senior Notes Series F 7.95% Due 2032 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Notes Series H 7.00% Due 2018 [Member]
Ameren Illinois Company [Member]
Dec. 31, 2011
Senior Notes Series I 6.30% Due 2020 [Member]
Ameren Illinois Company [Member]
Debt Instrument [Line Items]
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Long-term debt interest rate
8.875% 
5.25% 
4.65% 
5.50% 
4.75% 
5.40% 
6.40% 
6.00% 
5.10% 
6.70% 
5.10% 
5.00% 
5.50% 
5.30% 
8.45% 
 
5.45% 
 
 
 
7.69% 
6.625% 
6.625% 
8.875% 
6.20% 
6.25% 
6.125% 
6.25% 
9.75% 
6.125% 
6.70% 
6.70% 
6.20% 
5.50% 
5.90% 
5.70% 
5.95% 
5.70% 
 
5.40% 
5.40% 
8.35% 
7.95% 
7.00% 
6.30% 
Long-term debt maturity date
2014 
2012 
2013 
2014 
2015 
2016 
2017 
2018 
2018 
2019 
2019 
2020 
2034 
2037 
2039 
2022 
2028 
2033 
2033 
2033 
 
 
2011 
2013 
2016 
2016 
2017 
2018 
2018 
2028 
2036 
2036 
2012 
2014 
2023 
2024 
2026 
2026 
2028 
2028 
2028 
 
2032 
2018 
2020 
Long-Term Debt And Equity Financings (Schedule Of Long-Term Debt Outstanding) (Footnote) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate, maximum
18.00% 
 
Series 1992 Due 2022 [Member] |
Union Electric Company [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate during period
0.34% 
0.47% 
Series A 1998 Due 2033 [Member] |
Union Electric Company [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate during period
0.69% 
0.71% 
Series B 1998 Due 2033 [Member] |
Union Electric Company [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate during period
0.68% 
0.73% 
Series C 1998 Due 2033 [Member] |
Union Electric Company [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate during period
0.69% 
0.74% 
Series B-1 1993 Due 2028 [Member] |
Ameren Illinois Company [Member]
 
 
Debt Instrument [Line Items]
 
 
Debt instrument, interest rate during period
0.28% 
0.59% 
Long-Term Debt And Equity Financings (Schedule Of Maturities Of Long-Term Debt) (Details) (USD $)
Dec. 31, 2011
Dec. 31, 2010
2012
$ 179,000,000 
 
2013
355,000,000 
 
2014
585,000,000 
 
2015
120,000,000 
 
2016
395,000,000 
 
Thereafter
5,232,000,000 
 
Total
6,866,000,000 
 
Unamortized discount and premium
1,000,000 
 
Parent Company [Member]
 
 
Unamortized discount and premium
1,000,000 
2,000,000 
Union Electric Company [Member]
 
 
Unamortized discount and premium
5,000,000 
6,000,000 
Ameren Illinois Company [Member]
 
 
Unamortized discount and premium
8,000,000 
9,000,000 
Ameren Energy Generating Company [Member]
 
 
Unamortized discount and premium
1,000,000 
1,000,000 
Ameren Missouri [Member]
 
 
Unamortized discount and premium
$ 5,000,000 
 
Long-Term Debt And Equity Financings (Schedule Of Outstanding Preferred Stock) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Long-Term Debt And Equity Financings [Line Items]
 
 
Preferred stock, par value
$ 0.01 
 
Preferred stock, authorized
100,000,000 
 
Preferred stock, shares outstanding
 
Preferred stock, voluntary liquidation
$ 106 
 
Total Ameren
$ 142 
$ 142 
Union Electric Company [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Preferred stock, issued
80 
80 
Union Electric Company [Member] |
Par Value $100 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Preferred stock, par value
$ 100 
 
Preferred stock, authorized
25,000,000 
 
Union Electric Company [Member] |
Series $3.50 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 3.50 
 
Preferred stock, shares outstanding
130,000 
 
Preferred stock, redemption price per share
$ 110.000 
 
Preferred stock, issued
13 
13 
Union Electric Company [Member] |
Series $3.70 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 3.70 
 
Preferred stock, shares outstanding
40,000 
 
Preferred stock, redemption price per share
$ 104.750 
 
Preferred stock, issued
Union Electric Company [Member] |
Series $4.00 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 4.00 
 
Preferred stock, shares outstanding
150,000 
 
Preferred stock, redemption price per share
$ 105.625 
 
Preferred stock, issued
15 
15 
Union Electric Company [Member] |
Series $4.30 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 4.30 
 
Preferred stock, shares outstanding
40,000 
 
Preferred stock, redemption price per share
$ 105.000 
 
Preferred stock, issued
Union Electric Company [Member] |
Series $4.50 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 4.50 
 
Preferred stock, shares outstanding
213,595 
 
Preferred stock, redemption price per share
$ 110.000 1
 
Preferred stock, issued
21 
21 
Union Electric Company [Member] |
Series $4.56 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 4.56 
 
Preferred stock, shares outstanding
200,000 
 
Preferred stock, redemption price per share
$ 102.470 
 
Preferred stock, issued
20 
20 
Union Electric Company [Member] |
Series $4.75 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 4.75 
 
Preferred stock, shares outstanding
20,000 
 
Preferred stock, redemption price per share
$ 102.176 
 
Preferred stock, issued
Union Electric Company [Member] |
Series $5.50 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, per-dollar amount
$ 5.50 
 
Preferred stock, shares outstanding
14,000 
 
Preferred stock, redemption price per share
$ 110.000 1
 
Preferred stock, issued
1
1
Ameren Illinois Company [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Preferred stock, issued
62 
62 
Ameren Illinois Company [Member] |
Par Value $100 [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Preferred stock, par value
$ 100 
 
Preferred stock, authorized
2,000,000 
 
Ameren Illinois Company [Member] |
Series 4.00% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.00% 
 
Preferred stock, shares outstanding
144,275 
 
Preferred stock, redemption price per share
$ 101.000 
 
Preferred stock, issued
14 
14 
Ameren Illinois Company [Member] |
Series 4.08% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.08% 
 
Preferred stock, shares outstanding
45,224 
 
Preferred stock, redemption price per share
$ 103.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.20% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.20% 
 
Preferred stock, shares outstanding
23,655 
 
Preferred stock, redemption price per share
$ 104.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.25% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.25% 
 
Preferred stock, shares outstanding
50,000 
 
Preferred stock, redemption price per share
$ 102.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.26% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.26% 
 
Preferred stock, shares outstanding
16,621 
 
Preferred stock, redemption price per share
$ 103.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.42% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.42% 
 
Preferred stock, shares outstanding
16,190 
 
Preferred stock, redemption price per share
$ 103.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.70% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.70% 
 
Preferred stock, shares outstanding
18,429 
 
Preferred stock, redemption price per share
$ 103.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.90% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.90% 
 
Preferred stock, shares outstanding
73,825 
 
Preferred stock, redemption price per share
$ 102.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 4.92% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
4.92% 
 
Preferred stock, shares outstanding
49,289 
 
Preferred stock, redemption price per share
$ 103.500 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 5.16% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
5.16% 
 
Preferred stock, shares outstanding
50,000 
 
Preferred stock, redemption price per share
$ 102.000 
 
Preferred stock, issued
Ameren Illinois Company [Member] |
Series 6.625% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
6.625% 
 
Preferred stock, shares outstanding
124,274 
 
Preferred stock, redemption price per share
$ 100.000 
 
Preferred stock, issued
12 
12 
Ameren Illinois Company [Member] |
Series 7.75% [Member]
 
 
Long-Term Debt And Equity Financings [Line Items]
 
 
Dividend rate on preferred shares, percentage
7.75% 
 
Preferred stock, shares outstanding
4,542 
 
Preferred stock, redemption price per share
$ 100.000 
 
Preferred stock, issued
$ 1 
$ 1 
Other Income And Expenses (Other Income And Expenses) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Other Income And Expenses [Abstract]
 
 
 
Interest and dividend income
$ 4 1
$ 5 1
$ 2 1
Interest income on industrial development revenue bonds
28 1
28 1
28 1
Allowance for equity funds used during construction
34 1
52 1
36 1
Other
1
1
1
Total miscellaneous income
69 1
90 1
71 1
Donations
1
19 1
12 1
Other
15 1
14 1
11 1
Total miscellaneous expense
$ 23 1
$ 33 1
$ 23 1
Derivative Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Derivative Financial Instruments [Abstract]
 
 
Cash collateral held from counterparties
$ 1 
$ 1 
Counterparty letters of credit held as collateral
$ 9 
$ 28 
Derivative Financial Instruments (Open Gross Derivative Volumes By Commodity Type) (Details)
Dec. 31, 2011
Dec. 31, 2010
Coal (In Tons) [Member]
 
 
Derivative [Line Items]
 
 
NPNS Contract
147,000,000 1
73,000,000 1
Fuel Oils (In Gallons) [Member]
 
 
Derivative [Line Items]
 
 
Other Derivatives
36,000,000 2 3
55,000,000 3
Derivatives That Qualify for Regulatory Deferral
53,000,000 4
80,000,000 4
Natural Gas (In Mmbtu) [Member]
 
 
Derivative [Line Items]
 
 
NPNS Contract
50,000,000 1
98,000,000 1
Other Derivatives
17,000,000 2 3
21,000,000 3
Derivatives That Qualify for Regulatory Deferral
193,000,000 4
194,000,000 4
Power (In Megawatt Hours) [Member]
 
 
Derivative [Line Items]
 
 
NPNS Contract
73,000,000 1
63,000,000 1
Cash Flow Hedges
17,000,000 2 3
2,000,000 2 3
Other Derivatives
31,000,000 2 3
61,000,000 3
Derivatives That Qualify for Regulatory Deferral
21,000,000 4
18,000,000 4
Uranium (In Pounds) [Member]
 
 
Derivative [Line Items]
 
 
NPNS Contract
5,553,000 1
5,810,000 1
Derivatives That Qualify for Regulatory Deferral
148,000 4
185,000 4
Derivative Financial Instruments (Derivative Instruments Carrying Value) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Designated As Hedging Instrument [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
$ 24 1
$ 5 1
Derivative liabilities used as hedging instruments
1
1
Designated As Hedging Instrument [Member] |
Power [Member] |
Mark to Market Derivative Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
1
1
Designated As Hedging Instrument [Member] |
Power [Member] |
Other Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
16 1
1
Designated As Hedging Instrument [Member] |
Power [Member] |
Mark to Market Derivative Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
 
1
Designated As Hedging Instrument [Member] |
Power [Member] |
Other Deferred Credits and Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
1
 
Not Designated As Hedging Instrument [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
214 1 2
169 1 2
Derivative liabilities used as hedging instruments
280 1 2
252 1 2
Not Designated As Hedging Instrument [Member] |
Fuel Oils [Member] |
Mark to Market Derivative Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
29 1 2
42 1 2
Not Designated As Hedging Instrument [Member] |
Fuel Oils [Member] |
Other Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
1 2
22 1 2
Not Designated As Hedging Instrument [Member] |
Fuel Oils [Member] |
Mark to Market Derivative Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
1 2
12 1 2
Not Designated As Hedging Instrument [Member] |
Fuel Oils [Member] |
Other Deferred Credits and Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
 
1 2
Not Designated As Hedging Instrument [Member] |
Natural Gas [Member] |
Mark to Market Derivative Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
1 2
1 2
Not Designated As Hedging Instrument [Member] |
Natural Gas [Member] |
Other Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
 
1 2
Not Designated As Hedging Instrument [Member] |
Natural Gas [Member] |
Mark to Market Derivative Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
106 1 2
87 1 2
Not Designated As Hedging Instrument [Member] |
Natural Gas [Member] |
Other Deferred Credits and Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
92 1 2
84 1 2
Not Designated As Hedging Instrument [Member] |
Power [Member] |
Mark to Market Derivative Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
72 1 2
78 1 2
Not Designated As Hedging Instrument [Member] |
Power [Member] |
Other Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
99 1 2
20 1 2
Not Designated As Hedging Instrument [Member] |
Power [Member] |
Mark to Market Derivative Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
53 1 2
61 1 2
Not Designated As Hedging Instrument [Member] |
Power [Member] |
Other Deferred Credits and Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
26 1 2
1 2
Not Designated As Hedging Instrument [Member] |
Uranium [Member] |
Mark to Market Derivative Assets [Member]
 
 
Derivative [Line Items]
 
 
Derivative assets used hedging instruments
 
1 2
Not Designated As Hedging Instrument [Member] |
Uranium [Member] |
Other Deferred Credits and Liabilities [Member]
 
 
Derivative [Line Items]
 
 
Derivative liabilities used as hedging instruments
$ 1 1 2
 
Derivative Financial Instruments (Cumulative Amount Of Pretax Net Gains (Losses) On All Derivative Instruments In OCI) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Derivative [Line Items]
 
 
Current gains deferred as regulatory liabilities
$ 133 1
$ 99 
Current losses deferred as regulatory assets
215 1
267 
Power [Member]
 
 
Derivative [Line Items]
 
 
Gain (loss) to be amortized in next year
5.0 
8.0 
Current gains deferred as regulatory liabilities
29 
Current losses deferred as regulatory assets
17 
13 
Fuel Oils [Member]
 
 
Derivative [Line Items]
 
 
Current gains deferred as regulatory liabilities
16 
13 
Current losses deferred as regulatory assets
Natural Gas [Member]
 
 
Derivative [Line Items]
 
 
Current gains deferred as regulatory liabilities
Current losses deferred as regulatory assets
101 
84 
Uranium [Member]
 
 
Derivative [Line Items]
 
 
Current gains deferred as regulatory liabilities
 
Current losses deferred as regulatory assets
 
Interest Rate Swap [Member]
 
 
Derivative [Line Items]
 
 
Gain (loss) to be amortized in next year
(1.4)
 
Carrying value of net gains associated with interest rate swaps
Carrying value of net losses associated with interest rate swaps
10 
Accumulated Other Comprehensive Income (Loss) [Member] |
Power [Member]
 
 
Derivative [Line Items]
 
 
Cumulative deferred pretax gains (losses)
19 2
2
Accumulated Other Comprehensive Income (Loss) [Member] |
Interest Rate Contract [Member]
 
 
Derivative [Line Items]
 
 
Cumulative deferred pretax gains (losses)
(8)3 4
(9)3 4
Regulatory Liabilities Or Assets [Member] |
Power [Member]
 
 
Derivative [Line Items]
 
 
Cumulative deferred pretax gains (losses)
81 5
5
Regulatory Liabilities Or Assets [Member] |
Fuel Oils [Member]
 
 
Derivative [Line Items]
 
 
Cumulative deferred pretax gains (losses)
19 6
19 6
Regulatory Liabilities Or Assets [Member] |
Natural Gas [Member]
 
 
Derivative [Line Items]
 
 
Cumulative deferred pretax gains (losses)
(191)7
(165)7
Regulatory Liabilities Or Assets [Member] |
Uranium [Member]
 
 
Derivative [Line Items]
 
 
Cumulative deferred pretax gains (losses)
$ (1)8
$ 2 8
[5] Represents net losses associated with power derivative contracts. These contracts are a partial hedge of power price requirements through May 2032 at Ameren and Ameren Illinois and through December 2015 at Ameren Missouri, in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $29 million and $29 million at Ameren and Ameren Missouri, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $17 million, $8 million, and $209 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $8 million, $6 million, and $2 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $13 million, $3 million, and $181 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
[6] Represents net gains on fuel oils derivative contracts at Ameren Missouri. These contracts are a partial hedge of Ameren Missouri's transportation costs for coal through October 2014 as of December 31, 2011. Current gains deferred as regulatory liabilities include $16 million and $16 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current losses deferred as regulatory assets include $1 million and $1 million at Ameren and Ameren Missouri as of December 31, 2011, respectively. Current gains deferred as regulatory liabilities include $13 million and $13 million at Ameren and Ameren Missouri as of December 31, 2010, respectively. Current losses deferred as regulatory assets include $6 million and $6 million at Ameren and Ameren Missouri as of December 31, 2010, respectively.
[7] Represents net losses associated with natural gas derivative contracts. These contracts are a partial hedge of natural gas requirements through October 2016 at Ameren, Ameren Missouri, and Ameren Illinois in each case as of December 31, 2011. Current gains deferred as regulatory liabilities include $1 million and $1 million at Ameren and Ameren Illinois, respectively, as of December 31, 2011. Current losses deferred as regulatory assets include $101 million, $11 million, and $90 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2011. Current gains deferred as regulatory liabilities include $2 million, $1 million, and $1 million at Ameren, Ameren Missouri, and Ameren Illinois, respectively, as of December 31, 2010. Current losses deferred as regulatory assets include $84 million, $11 million, and $73 million at Ameren, Ameren Missouri and Ameren Illinois, respectively, as of December 31, 2010.
Derivative Financial Instruments (Maximum Exposure If Counterparties Fail To Perform On Contracts) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
$ 790 
$ 1,182 
Affiliates [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
276 1
410 1
Coal Producers [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
37 
30 
Commodity Marketing Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
89 
16 
Electric Utilities [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
16 
22 
Financial Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
84 
72 
Municipalities/Cooperatives [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
198 
550 
Oil And Gas Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
10 
Retail Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Maximum exposure to counterparties related to derivative contracts
$ 87 
$ 72 
Derivative Financial Instruments (Potential Loss On Counterparty Exposures) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
$ 750 
$ 1,094 
Affiliates [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
274 1
404 1
Coal Producers [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
35 
10 
Commodity Marketing Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
88 
11 
Electric Utilities [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
Financial Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
65 
59 
Municipalities/Cooperatives [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
191 
523 
Oil And Gas Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
Retail Companies [Member]
 
 
Concentration Risk [Line Items]
 
 
Potential loss on counterparty exposures related to derivative contracts
$ 86 
$ 71 
Derivative Financial Instruments (Cash Flow Hedges) (Details) (Power [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Derivative [Line Items]
 
 
Amount of Gain (Loss) Recognized in OCI
$ 6 1 2
$ (2)1 2
Operating Revenues-Electric [Member]
 
 
Derivative [Line Items]
 
 
Amount of (Gain) Loss Reclassified from OCI into Income
1 3
(14)1 3
Amount of Gain (Loss) Recognized in Income on Derivatives
$ (10)1 4
$ (3)1 4
Derivative Financial Instruments (Other Derivatives) (Details) (Not Designated As Hedging Instrument [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Derivative [Line Items]
 
 
Amount of Gain (Loss) Recognized in Income on Nondesignated Derivatives
$ (1)
$ 18 
Fuel Oils [Member] |
Operating Expenses-Fuel [Member]
 
 
Derivative [Line Items]
 
 
Amount of Gain (Loss) Recognized in Income on Nondesignated Derivatives
(1)1
1
Natural Gas (Generation) [Member] |
Operating Expenses-Fuel [Member]
 
 
Derivative [Line Items]
 
 
Amount of Gain (Loss) Recognized in Income on Nondesignated Derivatives
 
Power [Member] |
Operating Revenues-Electric [Member]
 
 
Derivative [Line Items]
 
 
Amount of Gain (Loss) Recognized in Income on Nondesignated Derivatives
$ (2)
$ 9 
Derivative Financial Instruments (Derivatives That Qualify For Regulatory Deferral) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Derivative [Line Items]
 
 
Net change in market value of derivatives that qualify for regulatory deferral
$ 51 
$ (61)
Fuel Oils [Member]
 
 
Derivative [Line Items]
 
 
Net change in market value of derivatives that qualify for regulatory deferral
 
14 1
Natural Gas [Member]
 
 
Derivative [Line Items]
 
 
Net change in market value of derivatives that qualify for regulatory deferral
(26)
(91)
Power [Member]
 
 
Derivative [Line Items]
 
 
Net change in market value of derivatives that qualify for regulatory deferral
80 
12 
Uranium [Member]
 
 
Derivative [Line Items]
 
 
Net change in market value of derivatives that qualify for regulatory deferral
$ (3)
$ 4 
Fair Value Measurements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Fair Value Measurements [Abstract]
 
 
 
Gain (loss) recognized related to valuation adjustments for counterparty default risk
$ (2)
$ 1 
$ (1)
Valuation adjustments related to net derivative contracts
$ 1 
$ 2 
 
Fair Value Measurements (Schedule Of Fair Value Hierarchy Of Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Excluded receivables, payables, and accrued income, net
$ (1)
$ 1 
Cash And Cash Equivalents [Member]
 
 
Nuclear Decommissioning Trust Fund
1 2
1 2
Cash And Cash Equivalents [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
Nuclear Decommissioning Trust Fund
1 2
1 2
Commodity Contracts [Member] |
Fuel Oils [Member]
 
 
Derivative assets
37 1 3
64 1 3
Derivative liabilities
1 3
13 1 3
Commodity Contracts [Member] |
Fuel Oils [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
Derivative assets
33 1 3
 
Derivative liabilities
1 3
 
Commodity Contracts [Member] |
Fuel Oils [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
Derivative assets
1 3
64 1 3
Derivative liabilities
 
13 1 3
Commodity Contracts [Member] |
Natural Gas [Member]
 
 
Derivative assets
1 3
1 3
Derivative liabilities
198 1 3
171 1 3
Commodity Contracts [Member] |
Natural Gas [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
Derivative assets
1 3
1 3
Derivative liabilities
22 1 3
21 1 3
Commodity Contracts [Member] |
Natural Gas [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
Derivative assets
1 3
1 3
Derivative liabilities
176 1 3
150 1 3
Commodity Contracts [Member] |
Power [Member]
 
 
Derivative assets
195 1 3
103 1 3
Derivative liabilities
80 1 3
69 1 3
Commodity Contracts [Member] |
Power [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
Derivative assets
1 3
17 1 3
Derivative liabilities
1 3
19 1 3
Commodity Contracts [Member] |
Power [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
Derivative assets
193 1 3
86 1 3
Derivative liabilities
78 1 3
50 1 3
Commodity Contracts [Member] |
Uranium [Member]
 
 
Derivative assets
 
1 3
Derivative liabilities
1 3
 
Commodity Contracts [Member] |
Uranium [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
Derivative assets
 
1 3
Derivative liabilities
1 3
 
Equity Securities [Member] |
U.S. Large Capitalization [Member]
 
 
Nuclear Decommissioning Trust Fund
234 1 2
228 1
Equity Securities [Member] |
U.S. Large Capitalization [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
Nuclear Decommissioning Trust Fund
234 1 2
228 1
Debt Securities [Member] |
Corporate Bonds [Member]
 
 
Nuclear Decommissioning Trust Fund
44 1
40 1
Debt Securities [Member] |
Corporate Bonds [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
Nuclear Decommissioning Trust Fund
44 1
40 1
Debt Securities [Member] |
Municipal Bonds [Member]
 
 
Nuclear Decommissioning Trust Fund
1
1
Debt Securities [Member] |
Municipal Bonds [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
Nuclear Decommissioning Trust Fund
1
1
Debt Securities [Member] |
U.S. Treasury And Agency Securities [Member]
 
 
Nuclear Decommissioning Trust Fund
65 1
50 1
Debt Securities [Member] |
U.S. Treasury And Agency Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
Nuclear Decommissioning Trust Fund
65 1
50 1
Debt Securities [Member] |
Asset-Backed Securities [Member]
 
 
Nuclear Decommissioning Trust Fund
10 1
14 1
Debt Securities [Member] |
Asset-Backed Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
Nuclear Decommissioning Trust Fund
10 1
14 1
Debt Securities [Member] |
Other Debt Securities [Member]
 
 
Nuclear Decommissioning Trust Fund
1
1
Debt Securities [Member] |
Other Debt Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
Nuclear Decommissioning Trust Fund
$ 1 1
$ 1 1
Fair Value Measurements (Schedule Of Changes In The Fair Value Of Financial Assets And Liabilities Classified As Level 3 In The Fair Value Hierarchy) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Fuel Oils [Member]
 
 
Beginning balance
$ 51 
$ 60 
Included in earnings
16 1
1
Included in regulatory assets/liabilities
19 
Total realized and unrealized gains (losses)
35 
Purchases
33 
Sales
(1)
 
Settlements
(56)
(51)
Transfers out of Level 3
(30)
 
Ending balance
51 
Change in unrealized gains (losses) related to assets/liabilities still held
(18)
11 
Natural Gas [Member]
 
 
Beginning balance
(148)
(67)
Included in regulatory assets/liabilities
(115)
(172)
Total realized and unrealized gains (losses)
(115)
(172)
Purchases
(5)
Sales
(1)
 
Settlements
89 
96 
Ending balance
(174)
(148)
Change in unrealized gains (losses) related to assets/liabilities still held
(78)
(92)
Power [Member]
 
 
Beginning balance
36 
38 
Included in earnings
(13)1
34 1
Included in OCI
24 
Included in regulatory assets/liabilities
75 
15 
Total realized and unrealized gains (losses)
86 
57 
Purchases
65 
39 
Sales
(22)
Settlements
(49)
(65)
Transfers into Level 3
 
(2)
Transfers out of Level 3
(1)
(32)
Ending balance
115 
36 
Change in unrealized gains (losses) related to assets/liabilities still held
73 
(7)
Uranium [Member]
 
 
Beginning balance
(2)
Included in regulatory assets/liabilities
(3)
Total realized and unrealized gains (losses)
(3)
Purchases
(1)
 
Settlements
Ending balance
(1)
Change in unrealized gains (losses) related to assets/liabilities still held
    
$ 1 
Fair Value Measurements (Schedule Of Transfers Between Fair Value Hierarchy Levels) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Fair Value Measurements [Abstract]
 
 
Transfers into Level 3/Transfers out of Level 1
 
$ (1)1
Transfers out of Level 3 / Transfers into Level 1
(30)1
 
Transfers into Level 3/Transfers out of Level 2
 
(1)1
Transfers out of Level 3/Transfers into Level 2
(1)1
(32)1
Net fair value of Level 3 transfers
$ (31)1
$ (34)1
Fair Value Measurements (Schedule Of Carrying Amounts And Estimated Fair Values Of Long-Term Debt And Preferred Stock) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Noncontrolling interest
20.00% 
 
Carrying Amount [Member]
 
 
Long-term debt and capital lease obligations (including current portion)
$ 6,856 1 2
$ 7,008 1 2
Preferred stock
142 1 2
142 1 2
Fair Value [Member]
 
 
Long-term debt and capital lease obligations (including current portion)
7,800 1 2
7,661 1 2
Preferred stock
$ 92 1 2
$ 102 1 2
Nuclear Decommissioning Trust Fund Investments (Fair Values Of Investments In Debt And Equity Securities In Nuclear Decommissioning Trust Fund) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
 
Cost
$ 261 
$ 247 
Gross unrealized gains
108 
99 
Gross unrealized loss
12 
Fair value
357 
337 
Debt Securities [Member]
 
 
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
 
Cost
114 
104 
Gross unrealized gains
Gross unrealized loss
 
Fair value
121 
107 
Equity Securities [Member]
 
 
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
 
Cost
145 
141 
Gross unrealized gains
101 
95 
Gross unrealized loss
12 
Fair value
234 
228 
Cash [Member]
 
 
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
 
Cost
Fair value
Other Debt And Equity Securities [Member]
 
 
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
 
Cost
(1)1
1
Fair value
$ (1)1
$ 1 1
Nuclear Decommissioning Trust Fund Investments (Costs And Fair Values Of Investments In Debt Securities In Nuclear Decommissioning Trust Fund According To Contractual Maturities) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Nuclear Decommissioning Trust Fund Investments [Abstract]
 
Cost, Less than 5 years
$ 57 
Cost, 5 years to 10 years
34 
Cost, Due after 10 years
23 
Cost, Total
114 
Fair Value, Less than 5 years
59 
Fair Value, 5 years to 10 years
36 
Fair Value, Due after 10 years
26 
Fair Value, Total
$ 121 
Nuclear Decommissioning Trust Fund Investments (Fair Value And The Gross Unrealized Losses Of The Available-For-Sale Securities Held In Nuclear Decommissioning Trust Fund) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
Less than 12 months, fair value
$ 25 
Less than 12 months, gross unrealized losses
12 months or greater, fair value
12 months or greater, gross unrealized losses
Total, fair value
33 
Total, gross unrealized losses
12 
Debt Securities [Member]
 
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
Less than 12 months, fair value
Total, fair value
Equity Securities [Member]
 
Nuclear Decommissioning Trust Fund Investments [Line Items]
 
Less than 12 months, fair value
18 
Less than 12 months, gross unrealized losses
12 months or greater, fair value
12 months or greater, gross unrealized losses
Total, fair value
26 
Total, gross unrealized losses
$ 12 
Callaway Energy Center (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Loss Contingencies [Line Items]
 
 
 
Number of mills charged for NWF fee
 
 
Costs incurred to be recovered
$ 13 
 
 
Settlement payment
11 
 
 
Annual decommissioning costs included in costs of service
Reduction To Depreciation And Amortization [Member]
 
 
 
Loss Contingencies [Line Items]
 
 
 
Settlement payment
 
 
Reduction To Other Operations And Maintenance [Member]
 
 
 
Loss Contingencies [Line Items]
 
 
 
Settlement payment
 
 
Reduction In Property And Plant [Member]
 
 
 
Loss Contingencies [Line Items]
 
 
 
Settlement payment
$ 7 
 
 
Retirement Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Number of high-quality corporate bonds
 
500 
 
 
Defined benefit plan, high-quality bond maturity, minimum range used to determine yield curve, in years
 
 
 
Defined benefit plan, high-quality bond maturity, maximum range used to determine yield curve, in years
 
30 
 
 
Defined benefit plan, estimated future employer contributions during the next five years
 
$ 580 
 
 
Actual return in excess of (or less than) expected return, percentage
 
25.00% 
 
 
Amortization basis, straight line, in years
 
10 
 
 
Number Of Employees Who Moved To A Cash Balance Formula [Member]
 
 
 
 
Number of employees
 
430 
700 
 
Pension Benefits [Member]
 
 
 
 
Expected return on plan assets
7.75% 
8.00% 
8.00% 
8.00% 
Postretirement Benefits [Member]
 
 
 
 
Expected return on plan assets
7.50% 
7.75% 
8.00% 
8.00% 
Minimum [Member]
 
 
 
 
Defined benefit plan, estimated future employer contributions during the next five years
 
90 
 
 
Maximum [Member]
 
 
 
 
Defined benefit plan, estimated future employer contributions during the next five years
 
150 
 
 
Private Equity [Member]
 
 
 
 
Number of limited partnerships in private equity funds
 
10 
 
 
Minimum invested capital within limited partnership investments
 
0.1 
 
 
Maximum invested capital within limited partnership investments
 
$ 7 
 
 
Retirement Benefits (Summary Of Benefit Liability Recorded) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Retirement Benefits [Abstract]
 
Benefit liability recorded on the balance sheet
$ 1,350 1
Retirement Benefits (Funded Status Of Benefit Plans And Amounts Included In Regulatory Assets And OCI) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Noncurrent liability
$ 1,344,000,000 
$ 1,045,000,000 
 
Total liability
1,350,000,000 1
 
 
Pension Benefits [Member]
 
 
 
Accumulated benefit obligation at end of year
3,645,000,000 1
3,246,000,000 1
 
Net benefit obligation at beginning of year
3,451,000,000 1
3,255,000,000 1
 
Service cost
75,000,000 1
68,000,000 1
68,000,000 1
Interest cost
180,000,000 1
185,000,000 1
186,000,000 1
Plan amendments
(16,000,000)1 2 3
(40,000,000)1 2 3
 
Actuarial (gain) loss
348,000,000 1
165,000,000 1
 
Benefits paid
(173,000,000)1
(182,000,000)1
 
Net benefit obligation at end of year
3,865,000,000 1
3,451,000,000 1
3,255,000,000 1
Fair value of plan assets at beginning of year
2,722,000,000 1
2,495,000,000 1
 
Actual return on plan assets
224,000,000 1
328,000,000 1
 
Employer contributions
103,000,000 1
81,000,000 1
99,000,000 1
Fair value of plan assets at end of year
2,876,000,000 1
2,722,000,000 1
2,495,000,000 1
Funded status - deficiency
989,000,000 1
729,000,000 1
 
Accrued benefit cost at December 31
989,000,000 1
729,000,000 1
 
Current liability
3,000,000 1
4,000,000 1
 
Noncurrent liability
986,000,000 1
725,000,000 1
 
Total liability
989,000,000 1
729,000,000 1
 
Net actuarial loss
734,000,000 1
507,000,000 1
 
Prior service cost (credit)
(7,000,000)1
(11,000,000)1
 
Amounts recognized in accumulated OCI, Net actuarial loss
79,000,000 1
24,000,000 1
 
Amounts recognized in accumulated OCI, Prior service cost (credit)
(15,000,000)1
4,000,000 1
 
Defined benefit plan, accumulated other comprehensive income and regulatory assets, before tax
791,000,000 1
524,000,000 1
 
Postretirement Benefits [Member]
 
 
 
Net benefit obligation at beginning of year
1,120,000,000 1
1,143,000,000 1
 
Service cost
22,000,000 1
20,000,000 1
19,000,000 1
Interest cost
58,000,000 1
62,000,000 1
66,000,000 1
Participant contributions
18,000,000 1
17,000,000 1
 
Actuarial (gain) loss
96,000,000 1
(53,000,000)1
 
Benefits paid
(66,000,000)1
(74,000,000)1
 
Early retiree reinsurance program receipt
3,000,000 1
 
 
Federal subsidy on benefits paid
6,000,000 1
5,000,000 1
 
Net benefit obligation at end of year
1,257,000,000 1
1,120,000,000 1
1,143,000,000 1
Fair value of plan assets at beginning of year
797,000,000 1
732,000,000 1
 
Actual return on plan assets
9,000,000 1
81,000,000 1
 
Employer contributions
129,000,000 1
36,000,000 1
49,000,000 1
Fair value of plan assets at end of year
896,000,000 1
797,000,000 1
732,000,000 1
Funded status - deficiency
361,000,000 1
323,000,000 1
 
Accrued benefit cost at December 31
361,000,000 1
323,000,000 1
 
Current liability
3,000,000 1
3,000,000 1
 
Noncurrent liability
358,000,000 1
320,000,000 1
 
Total liability
361,000,000 1
323,000,000 1
 
Net actuarial loss
177,000,000 1
86,000,000 1
 
Prior service cost (credit)
(28,000,000)1
(32,000,000)1
 
Transition obligation
2,000,000 1
5,000,000 1
 
Amounts recognized in accumulated OCI, Net actuarial loss
43,000,000 1
13,000,000 1
 
Amounts recognized in accumulated OCI, Prior service cost (credit)
(7,000,000)1
(10,000,000)1
 
Defined benefit plan, accumulated other comprehensive income and regulatory assets, before tax
$ 187,000,000 1
$ 62,000,000 1
 
Retirement Benefits (Assumptions Used To Determine Benefit Obligations) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Pension Benefits [Member]
 
 
Discount rate at measurement date
4.50% 
5.25% 
Increase in future compensation
3.50% 
3.50% 
Medical cost trend rate (initial)
   
 
Medical cost trend rate (ultimate)
   
 
Years to ultimate rate
Postretirement Benefits [Member]
 
 
Discount rate at measurement date
4.50% 
5.25% 
Increase in future compensation
3.50% 
3.50% 
Medical cost trend rate (initial)
5.50% 
6.00% 
Medical cost trend rate (ultimate)
5.00% 
5.00% 
Years to ultimate rate
10 year 
2 years 
Retirement Benefits (Cash Contributions Made To Benefit Plans) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Pension Benefits [Member]
 
 
 
Cash contributions to benefit plans
$ 103,000,000 1
$ 81,000,000 1
$ 99,000,000 1
Postretirement Benefits [Member]
 
 
 
Cash contributions to benefit plans
$ 129,000,000 1
$ 36,000,000 1
$ 49,000,000 1
Retirement Benefits (Target Allocation Of The Plans' Asset Categories) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Pension Benefits [Member]
 
 
Percentage of Plan Assets, Total
100.00% 
100.00% 
Pension Benefits [Member] |
Cash And Cash Equivalents [Member]
 
 
Minimum Target Allocation
0.00% 
 
Maximum Target Allocation
5.00% 
 
Percentage of Plan Assets, Other
2.00% 
1.00% 
Pension Benefits [Member] |
Equity Securities [Member]
 
 
Minimum Target Allocation, Equity securities
50.00% 
 
Maximum Target Allocation, Equity securities
60.00% 
 
Percentage of Plan Assets, Equity securities
51.00% 
57.00% 
Pension Benefits [Member] |
U.S. Large Capitalization [Member]
 
 
Minimum Target Allocation, Equity securities
29.00% 
 
Maximum Target Allocation, Equity securities
39.00% 
 
Percentage of Plan Assets, Equity securities
33.00% 
31.00% 
Pension Benefits [Member] |
U.S. Small And Mid Capitalization [Member]
 
 
Minimum Target Allocation, Equity securities
2.00% 
 
Maximum Target Allocation, Equity securities
12.00% 
 
Percentage of Plan Assets, Equity securities
7.00% 
11.00% 
Pension Benefits [Member] |
International And Emerging Markets [Member]
 
 
Minimum Target Allocation, Equity securities
9.00% 
 
Maximum Target Allocation, Equity securities
19.00% 
 
Percentage of Plan Assets, Equity securities
11.00% 
15.00% 
Pension Benefits [Member] |
Debt Securities [Member]
 
 
Minimum Target Allocation, Debt securities
35.00% 
 
Maximum Target Allocation, Debt securities
45.00% 
 
Percentage of Plan Assets, Debt securities
42.00% 
37.00% 
Pension Benefits [Member] |
Real Estate [Member]
 
 
Minimum Target Allocation, Real estate
0.00% 
 
Maximum Target Allocation, Real estate
9.00% 
 
Percentage of Plan Assets, Real estate
4.00% 
4.00% 
Pension Benefits [Member] |
Private Equity [Member]
 
 
Maximum Target Allocation
4.00% 
 
Percentage of Plan Assets, Other
1.00% 
1.00% 
Postretirement Benefits [Member]
 
 
Percentage of Plan Assets, Total
100.00% 
100.00% 
Postretirement Benefits [Member] |
Cash And Cash Equivalents [Member]
 
 
Minimum Target Allocation
0.00% 
 
Maximum Target Allocation
10.00% 
 
Percentage of Plan Assets, Other
4.00% 
4.00% 
Postretirement Benefits [Member] |
Equity Securities [Member]
 
 
Minimum Target Allocation, Equity securities
55.00% 
 
Maximum Target Allocation, Equity securities
65.00% 
 
Percentage of Plan Assets, Equity securities
59.00% 
63.00% 
Postretirement Benefits [Member] |
U.S. Large Capitalization [Member]
 
 
Minimum Target Allocation, Equity securities
33.00% 
 
Maximum Target Allocation, Equity securities
43.00% 
 
Percentage of Plan Assets, Equity securities
38.00% 
39.00% 
Postretirement Benefits [Member] |
U.S. Small And Mid Capitalization [Member]
 
 
Minimum Target Allocation, Equity securities
3.00% 
 
Maximum Target Allocation, Equity securities
13.00% 
 
Percentage of Plan Assets, Equity securities
8.00% 
10.00% 
Postretirement Benefits [Member] |
International [Member]
 
 
Minimum Target Allocation, Equity securities
10.00% 
 
Maximum Target Allocation, Equity securities
20.00% 
 
Percentage of Plan Assets, Equity securities
13.00% 
14.00% 
Postretirement Benefits [Member] |
Debt Securities [Member]
 
 
Minimum Target Allocation, Debt securities
30.00% 
 
Maximum Target Allocation, Debt securities
40.00% 
 
Percentage of Plan Assets, Debt securities
37.00% 
33.00% 
Postretirement Benefits [Member] |
Private Equity [Member]
 
 
Minimum Target Allocation
0.00% 
 
Retirement Benefits (Fair Value Of Plan Assets Utilizing Fair Value Hierarchy) (Details) (USD $)
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Other Debt Securities [Member]
 
 
 
Fair value of plan assets
 
 
$ 1,000,000 
Real Estate [Member]
 
 
 
Fair value of plan assets
108,000,000 
98,000,000 
90,000,000 
Private Equity [Member]
 
 
 
Fair value of plan assets
23,000,000 
28,000,000 
33,000,000 
Pension Benefits [Member]
 
 
 
Fair value of plan assets
2,876,000,000 1
2,722,000,000 1
2,495,000,000 1
Pension Benefits [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
389,000,000 
 
 
Pension Benefits [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
2,424,000,000 
 
 
Pension Benefits [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
 
Fair value of plan assets
131,000,000 
 
 
Pension Benefits [Member] |
Cash And Cash Equivalents [Member]
 
 
 
Fair value of plan assets
31,000,000 
20,000,000 
 
Pension Benefits [Member] |
Cash And Cash Equivalents [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
31,000,000 
20,000,000 
 
Pension Benefits [Member] |
U.S. Large Capitalization [Member]
 
 
 
Fair value of plan assets
994,000,000 
882,000,000 
 
Pension Benefits [Member] |
U.S. Large Capitalization [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
72,000,000 
70,000,000 
 
Pension Benefits [Member] |
U.S. Large Capitalization [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
922,000,000 
812,000,000 
 
Pension Benefits [Member] |
U.S. Small And Mid Capitalization [Member]
 
 
 
Fair value of plan assets
213,000,000 
309,000,000 
 
Pension Benefits [Member] |
U.S. Small And Mid Capitalization [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
202,000,000 
299,000,000 
 
Pension Benefits [Member] |
U.S. Small And Mid Capitalization [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
11,000,000 
10,000,000 
 
Pension Benefits [Member] |
International And Emerging Markets [Member]
 
 
 
Fair value of plan assets
328,000,000 
413,000,000 
 
Pension Benefits [Member] |
International And Emerging Markets [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
115,000,000 
129,000,000 
 
Pension Benefits [Member] |
International And Emerging Markets [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
213,000,000 
284,000,000 
 
Pension Benefits [Member] |
Corporate Bonds [Member]
 
 
 
Fair value of plan assets
720,000,000 
646,000,000 
 
Pension Benefits [Member] |
Corporate Bonds [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
720,000,000 
646,000,000 
 
Pension Benefits [Member] |
Municipal Bonds [Member]
 
 
 
Fair value of plan assets
176,000,000 
129,000,000 
 
Pension Benefits [Member] |
Municipal Bonds [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
176,000,000 
129,000,000 
 
Pension Benefits [Member] |
U.S. Treasury And Agency Securities [Member]
 
 
 
Fair value of plan assets
230,000,000 
154,000,000 
 
Pension Benefits [Member] |
U.S. Treasury And Agency Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
230,000,000 
154,000,000 
 
Pension Benefits [Member] |
Other Debt Securities [Member]
 
 
 
Fair value of plan assets
121,000,000 
100,000,000 
 
Pension Benefits [Member] |
Other Debt Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
121,000,000 
100,000,000 
 
Pension Benefits [Member] |
Real Estate [Member]
 
 
 
Fair value of plan assets
108,000,000 
98,000,000 
 
Pension Benefits [Member] |
Real Estate [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
 
Fair value of plan assets
108,000,000 
98,000,000 
 
Pension Benefits [Member] |
Private Equity [Member]
 
 
 
Fair value of plan assets
23,000,000 
28,000,000 
 
Pension Benefits [Member] |
Private Equity [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
 
Fair value of plan assets
23,000,000 
28,000,000 
 
Pension Benefits [Member] |
Derivative Assets [Member]
 
 
 
Fair value of plan assets
1,000,000 
1,000,000 
 
Pension Benefits [Member] |
Derivative Assets [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
1,000,000 
1,000,000 
 
Pension Benefits [Member] |
Derivative Liabilities [Member]
 
 
 
Fair value of plan assets
(1,000,000)
(1,000,000)
 
Pension Benefits [Member] |
Derivative Liabilities [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
(1,000,000)
(1,000,000)
 
Pension Benefits [Member] |
Medical Benefit Component Excluded [Member]
 
 
 
Fair value of plan assets
(91,000,000)2
(85,000,000)2
 
Pension Benefits [Member] |
Pending Security Sales Included [Member]
 
 
 
Fair value of plan assets
23,000,000 3
28,000,000 3
 
Postretirement Benefits [Member]
 
 
 
Fair value of plan assets
896,000,000 1
797,000,000 1
732,000,000 1
Postretirement Benefits [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
337,000,000 
324,000,000 
 
Postretirement Benefits [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
501,000,000 
394,000,000 
 
Postretirement Benefits [Member] |
Cash And Cash Equivalents [Member]
 
 
 
Fair value of plan assets
67,000,000 
35,000,000 
 
Postretirement Benefits [Member] |
Cash And Cash Equivalents [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
1,000,000 
 
 
Postretirement Benefits [Member] |
Cash And Cash Equivalents [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
66,000,000 
35,000,000 
 
Postretirement Benefits [Member] |
U.S. Large Capitalization [Member]
 
 
 
Fair value of plan assets
313,000,000 
287,000,000 
 
Postretirement Benefits [Member] |
U.S. Large Capitalization [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
235,000,000 
215,000,000 
 
Postretirement Benefits [Member] |
U.S. Large Capitalization [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
78,000,000 
72,000,000 
 
Postretirement Benefits [Member] |
U.S. Small And Mid Capitalization [Member]
 
 
 
Fair value of plan assets
57,000,000 
66,000,000 
 
Postretirement Benefits [Member] |
U.S. Small And Mid Capitalization [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
57,000,000 
66,000,000 
 
Postretirement Benefits [Member] |
International [Member]
 
 
 
Fair value of plan assets
100,000,000 
94,000,000 
 
Postretirement Benefits [Member] |
International [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
44,000,000 
43,000,000 
 
Postretirement Benefits [Member] |
International [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
56,000,000 
51,000,000 
 
Postretirement Benefits [Member] |
Corporate Bonds [Member]
 
 
 
Fair value of plan assets
61,000,000 
59,000,000 
 
Postretirement Benefits [Member] |
Corporate Bonds [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
61,000,000 
59,000,000 
 
Postretirement Benefits [Member] |
Municipal Bonds [Member]
 
 
 
Fair value of plan assets
86,000,000 
58,000,000 
 
Postretirement Benefits [Member] |
Municipal Bonds [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
86,000,000 
58,000,000 
 
Postretirement Benefits [Member] |
U.S. Treasury And Agency Securities [Member]
 
 
 
Fair value of plan assets
82,000,000 
59,000,000 
 
Postretirement Benefits [Member] |
U.S. Treasury And Agency Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
82,000,000 
59,000,000 
 
Postretirement Benefits [Member] |
Asset-Backed Securities [Member]
 
 
 
Fair value of plan assets
23,000,000 
31,000,000 
 
Postretirement Benefits [Member] |
Asset-Backed Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
23,000,000 
31,000,000 
 
Postretirement Benefits [Member] |
Other Debt Securities [Member]
 
 
 
Fair value of plan assets
49,000,000 
29,000,000 
 
Postretirement Benefits [Member] |
Other Debt Securities [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
49,000,000 
29,000,000 
 
Postretirement Benefits [Member] |
Medical Benefit Component Excluded [Member]
 
 
 
Fair value of plan assets
91,000,000 2
85,000,000 2
 
Postretirement Benefits [Member] |
Pending Security Sales Excluded [Member]
 
 
 
Fair value of plan assets
(33,000,000)4
(6,000,000)4
 
Includes Medical Benefit Component Under Section 401(h) And Excludes Payables Related To Pending Security Sales [Member] |
Postretirement Benefits [Member]
 
 
 
Fair value of plan assets
896,000,000 
797,000,000 
 
Excludes Medical Benefit Component Under Section 401(h) And Includes Receivables Related To Pending Security Sales [Member] |
Pension Benefits [Member]
 
 
 
Fair value of plan assets
2,876,000,000 
 
 
Excludes Medical Benefit Component Under Section 401(h) And Includes Receivables Related To Pending Security Sales [Member] |
Pension Benefits [Member] |
Quoted Prices In Active Markets For Identical Assets Or Liabilities (Level 1) [Member]
 
 
 
Fair value of plan assets
 
498,000,000 
 
Excludes Medical Benefit Component Under Section 401(h) And Includes Receivables Related To Pending Security Sales [Member] |
Pension Benefits [Member] |
Significant Other Observable Inputs (Level 2) [Member]
 
 
 
Fair value of plan assets
 
2,155,000,000 
 
Excludes Medical Benefit Component Under Section 401(h) And Includes Receivables Related To Pending Security Sales [Member] |
Pension Benefits [Member] |
Significant Other Unobservable Inputs (Level 3) [Member]
 
 
 
Fair value of plan assets
 
126,000,000 
 
Excludes Medical Benefit Component Under Section 401(h) And Excludes Payables Related To Pending Security Sales [Member] |
Postretirement Benefits [Member]
 
 
 
Fair value of plan assets
838,000,000 
718,000,000 
 
Includes Medical Benefit Component Under Section 401(h) And Excludes Receivables Related To Pending Security Sales [Member] |
Pension Benefits [Member]
 
 
 
Fair value of plan assets
$ 2,944,000,000 
$ 2,779,000,000 
 
Retirement Benefits (Changes In The Fair Value Of Plan Assets Classified As Level 3) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Other Debt Securities [Member]
 
 
Fair value of plan assets at beginning of year
 
$ 1,000,000 
Purchases, Sales and Settlements, net
 
(1,000,000)
Real Estate [Member]
 
 
Fair value of plan assets at beginning of year
98,000,000 
90,000,000 
Actual Return on Plan Assets Related to Assets Still Held at the Reporting Date
10,000,000 
7,000,000 
Purchases, Sales and Settlements, net
 
1,000,000 
Fair value of plan assets at end of year
108,000,000 
98,000,000 
Private Equity [Member]
 
 
Fair value of plan assets at beginning of year
28,000,000 
33,000,000 
Actual Return on Plan Assets Related to Assets Still Held at the Reporting Date
(10,000,000)
(5,000,000)
Actual Return on Plan Assets Related to Assets Sold During the Period
11,000,000 
7,000,000 
Purchases, Sales and Settlements, net
(6,000,000)
(7,000,000)
Fair value of plan assets at end of year
$ 23,000,000 
$ 28,000,000 
Retirement Benefits (Components Of Net Periodic Benefit Cost) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Pension Benefits [Member]
 
 
 
 
Service cost
 
$ 75 1
$ 68 1
$ 68 1
Interest cost
 
180 1
185 1
186 1
Expected return on plan assets
 
(216)1
(212)1
(206)1
Amortization of prior service cost (benefit)
 
(1)1
1
1
Amortization of actuarial loss
 
42 1
18 1
24 1
Net periodic benefit cost
91 1
80 1
65 1
81 1
Postretirement Benefits [Member]
 
 
 
 
Service cost
 
22 1
20 1
19 1
Interest cost
 
58 1
62 1
66 1
Expected return on plan assets
 
(54)1
(56)1
(54)1
Amortization of transition obligation
 
1
1
1
Amortization of prior service cost (benefit)
 
(8)1
(8)1
(8)1
Amortization of actuarial loss
 
1
1
1
Net periodic benefit cost
$ 23 1
$ 25 1
$ 21 1
$ 34 1
Retirement Benefits (Summary Of Estimated Amortizable Amounts From Regulatory Assets and Accumulated OCI Into Net Periodic Benefit Cost) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Pension Benefits [Member]
 
 
 
 
Amounts recognized in regulatory assets, Prior service cost (credit)
$ (1)1
 
 
 
Amounts recognized in regulatory assets, Net actuarial loss
87 1
 
 
 
Amounts recognized in accumulated OCI, Prior service cost (credit)
(1)1
 
 
 
Amounts recognized in accumulated OCI, Net actuarial loss
1
 
 
 
Total
91 1
80 1
65 1
81 1
Postretirement Benefits [Member]
 
 
 
 
Amounts recognized in regulatory assets, Transition obligation
1
 
 
 
Amounts recognized in regulatory assets, Prior service cost (credit)
(4)1
 
 
 
Amounts recognized in regulatory assets, Net actuarial loss
23 1
 
 
 
Amounts recognized in accumulated OCI, Prior service cost (credit)
(1)1
 
 
 
Amounts recognized in accumulated OCI, Net actuarial loss
1
 
 
 
Total
$ 23 1
$ 25 1
$ 21 1
$ 34 1
Retirement Benefits (Summary Of Benefit Plan Costs Incurred) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Pension Benefits [Member]
 
 
 
 
Net periodic benefit cost
$ 91 1
$ 80 1
$ 65 1
$ 81 1
Postretirement Benefits [Member]
 
 
 
 
Net periodic benefit cost
$ 23 1
$ 25 1
$ 21 1
$ 34 1
Retirement Benefits (Schedule Of Expected Payments From Qualified Trust And Company Funds) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Pension Benefits [Member] |
Paid From Qualified Trust [Member]
 
2012
$ 223 
2013
225 
2014
230 
2015
231 
2016
232 
2017 - 2021
1,167 
Pension Benefits [Member] |
Paid From Company Funds [Member]
 
2012
2013
2014
2015
2016
2017 - 2021
12 
Postretirement Benefits [Member]
 
2012, Federal Subsidy
2013, Federal Subsidy
2014, Federal Subsidy
2015, Federal Subsidy
2016, Federal Subsidy
2017 - 2021, Federal Subsidy
32 
Postretirement Benefits [Member] |
Paid From Qualified Trust [Member]
 
2012
68 
2013
71 
2014
74 
2015
77 
2016
80 
2017 - 2021
443 
Postretirement Benefits [Member] |
Paid From Company Funds [Member]
 
2012
2013
2014
2015
2016
2017 - 2021
$ 14 
Retirement Benefits (Assumptions Used To Determine Net Periodic Benefit Cost) (Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Pension Benefits [Member]
 
 
 
 
Discount rate at measurement date
 
5.25% 
5.75% 
5.75% 
Expected return on plan assets
7.75% 
8.00% 
8.00% 
8.00% 
Increase in future compensation
 
3.50% 
3.50% 
4.00% 
Postretirement Benefits [Member]
 
 
 
 
Discount rate at measurement date
 
5.25% 
5.75% 
5.75% 
Expected return on plan assets
7.50% 
7.75% 
8.00% 
8.00% 
Increase in future compensation
 
3.50% 
3.50% 
4.00% 
Medical cost trend rate (initial)
 
6.00% 
6.50% 
7.00% 
Medical cost trend rate (ultimate)
 
5.00% 
5.00% 
5.00% 
Years to ultimate rate
 
Retirement Benefits (Schedule Of Potential Changes In Key Assumptions) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Pension Benefits [Member]
 
Service Cost and Interest Cost, .25% decrease in discount rate
$ (2)
Benefit Obligation, .25% decrease in discount rate
110 
Service Cost and Interest Cost, .25% increase in salary rate
Benefit Obligation, .25% increase in salary rate
14 
Postretirement Benefits [Member]
 
Benefit Obligation, .25% decrease in discount rate
38 
Service Cost and Interest Cost, 1.00% increase in annual medical trend
Benefit Obligation, 1.00% increase in annual medical trend
42 
Service Cost and Interest Cost, 1.00% decrease in annual medical trend
(3)
Benefit Obligation, 1.00% decrease in annual medical trend
$ (41)
Retirement Benefits (Schedule Of Matching Contributions) (Details) (401 (K) [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
401 (K) [Member]
 
 
 
Employer contributions
$ 28 1
$ 27 1
$ 24 1
Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
months
Dec. 31, 2010
Dec. 31, 2009
Jan. 31, 2011
Performance Share Units [Member]
Jan. 31, 2010
Performance Share Units [Member]
Dec. 31, 2011
Performance Share Units [Member]
years
Maximum shares available for grants
 
 
 
 
 
Share-based compensation expense
$ 14 
$ 13 
$ 13 
 
 
 
Employee service share-based compensation, tax benefit from compensation expense
 
 
 
Amounts paid to settle share units
 
 
 
Compensation cost not yet recognized
$ 17 
 
 
 
 
 
Expected weighted average recognition period for share-based compensation expense, in months
20 
 
 
 
 
 
Percentage of shares issued per share unit, minimum
 
 
 
 
 
0.00% 
Percentage of shares issued per share unit, maximum
 
 
 
 
 
200.00% 
Vested performance units held, year
 
 
 
 
 
Fair value of each share unit, per share
 
 
 
$ 31.41 
$ 32.01 
$ 31.41 
Closing common share price
 
 
 
$ 28.19 
$ 27.95 
 
Three-year risk-free rate
 
 
 
1.08% 
1.70% 
 
Volatility rate, minimum
 
 
 
22.00% 
23.00% 
 
Volatility rate, maximum
 
 
 
36.00% 
39.00% 
 
Stock-Based Compensation (Summary Of Nonvested Shares) (Details) (USD $)
1 Months Ended 12 Months Ended
Jan. 31, 2011
Jan. 31, 2010
Dec. 31, 2011
Performance Share Units [Member]
 
 
 
Share Units, Nonvested at January 1, 2011
1,142,768 
 
1,142,768 
Share Units, Granted
 
 
731,962 
Share Units, Unearned or forfeited
 
 
(565,538)
Share Units, Earned and vested
 
 
(152,361)
Share Units, Nonvested at December 31, 2011
 
 
1,156,831 
Weighted-average Fair Value per Unit, Nonvested at January 1, 2011
$ 23.96 
 
$ 23.96 
Weighted-average Fair Value per Unit, Granted
$ 31.41 
$ 32.01 
$ 31.41 
Weighted-average Fair Value per Unit, Unearned or forfeited
 
 
$ 16.28 
Weighted-average Fair Value per Unit, Earned and vested
 
 
$ 29.47 
Weighted-average Fair Value per Unit, Nonvested at December 31, 2011
 
 
$ 31.70 
Restricted Stock [Member]
 
 
 
Share Units, Nonvested at January 1, 2011
83,154 
 
83,154 
Share Units, Dividends
 
 
1,005 
Share Units, Unearned or forfeited
 
 
(560)
Share Units, Earned and vested
 
 
(83,599)
Weighted-average Fair Value per Unit, Nonvested at January 1, 2011
$ 49.87 
 
$ 49.87 
Weighted-average Fair Value per Unit, Dividends
 
 
$ 30.04 
Weighted-average Fair Value per Unit, Unearned or forfeited
 
 
$ 50.45 
Weighted-average Fair Value per Unit, Earned and vested
 
 
$ 49.89 
Income Taxes (Narrative) (Details) (USD $)
12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Illinois Corporate Income Tax [Member]
Jan. 31, 2011
Minimum [Member]
Illinois Corporate Income Tax [Member]
Jan. 31, 2011
Maximum [Member]
Illinois Corporate Income Tax [Member]
Dec. 31, 2025
Scenario, Plan [Member]
Minimum [Member]
Illinois Corporate Income Tax [Member]
Dec. 31, 2015
Scenario, Plan [Member]
Maximum [Member]
Illinois Corporate Income Tax [Member]
State corporate income tax rate
4.00% 
8.00% 
5.00% 
 
7.30% 
9.50% 
7.30% 
7.75% 
Increase in current state and local tax expense benefit
 
 
 
$ 6,000,000 
 
 
 
 
Decrease in deferred state and local income tax expense benefit
 
 
 
2,000,000 
 
 
 
 
Reduction of uncertain tax positions
$ 39,000,000 
 
 
 
 
 
 
 
Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details)
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Abstract]
 
 
 
Statutory federal income tax rate
35.00% 
35.00% 
35.00% 
Non-deductible impairment of goodwill
 
32.00% 
 
Depreciation differences
(1.00%)
(4.00%)
(1.00%)
Amortization of investment tax credit
(1.00%)
(2.00%)
(1.00%)
State tax rate
4.00% 
8.00% 
5.00% 
Reserve for uncertain tax positions
 
(1.00%)
(1.00%)
Permanent items
 
 
(1.00%)1
Tax credits
 
(3.00%)
(1.00%)
Change in federal tax law
 
3.00% 2
 
Effective income tax rate
37.00% 
68.00% 
35.00% 
Income Taxes (Schedule Of Components Of Income Tax Expense (Benefit)) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Income Taxes [Abstract]
 
 
 
Current Federal taxes
$ (27)1
$ 13 1
$ (73)1
Current State taxes
(5)1
10 1
1
Deferred Federal taxes
273 1
274 1
337 1
Deferred State taxes
76 1
36 1
74 1
Deferred investment tax credits, amortization
(7)1
(8)1
(9)1
Total income tax expense
$ 310 1
$ 325 1
$ 332 1
Income Taxes (Schedule Of Deferred Tax Assets And Liabilities Resulting From Temporary Differences) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Plant related
$ 3,811 1
$ 3,310 1
Deferred intercompany tax gain/basis step-up
1
1
Regulatory assets (liabilities), net
73 1
67 1
Deferred benefit costs
(367)1
(360)1
Purchase accounting
35 1
106 1
ARO
(37)1
(48)1
Other
(223)1
(120)1
Total net accumulated deferred income tax liabilities
3,295 1 2
2,957 1 3
Ameren Corporation [Member]
 
 
Current assets
20 
 
Current liabilities
 
$ 71 
Income Taxes (Schedule Of Net Operating Loss Carryforwards And Tax Credit Carryforwards) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Operating loss carryforwards
$ 153 
Tax credit carryforwards
100 
Federal [Member]
 
Operating loss carryforwards
136 1
Tax credit carryforwards
72 2
Net operating loss carryforward, expiration period start
2028 
Tax credit carryforward, expiration period start
2029 
State [Member]
 
Operating loss carryforwards
17 3
Tax credit carryforwards
$ 28 4
Net operating loss carryforward, expiration period start
2017 
Tax credit carryforward, expiration period start
2012 
Income Taxes (Reconciliation Of The Change In The Liability For Interest On Unrecognized Tax Benefits) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
Income Taxes [Abstract]
 
 
 
 
Liability for interest
$ 5 
$ 17 
$ 8 
$ 10 
Interest charges (income)
(11)
(2)
 
Interest payment
$ (1)
 
 
 
Commitments And Contingencies (Callaway Nuclear Energy Center) (Details) (USD $)
12 Months Ended
Dec. 31, 2011
weeks
years
Insurance aggregate maximum coverage
$ 12,594,000,000 1
Insurance maximum coverage per incident
118,000,000 
Threshold for which a retrospective assessment for a covered loss is necessary
375,000,000 
Annual payment in the event of an incident at any licensed commercial reactor
17,500,000 
Aggregate maximum assessment per incident under Price-Anderson liability provisions of Atomic Energy Act
118,000,000 
Maximum annual payment to be paid in a calendar year per reactor incident under liability provisions of Atomic Energy Act
17,500,000 
Amount of primary property liability coverage
500,000,000 
Amount of coverage in excess of primary property liability coverage
2,250,000,000 
Losses in excess of primary coverage
500,000,000 
Amount of weekly indemnity coverage commencing eight weeks after power outage
4,500,000 
Number of weeks of coverage after the first eight weeks of an outage
52 
Amount of additional weekly indemnity coverage commencing after initial indemnity coverage
3,600,000 
Number of additional weeks after initial indemnity coverage for power outage, minimum
71 
Amount of weekly indemnity coverage thereafter not exceeding policy limit
490,000,000 
Amount of secondary weekly indemnity coverage for prolonged nuclear plant outage in excess of primary indemnity coverage
900,000 
Inflationary adjustment prescribed by most recent Price-Anderson Act renewal, in years
Aggregate nuclear power industry insurance policy limit for losses from terrorist attacks within twelve month period
3,240,000,000 
Public Liability And Nuclear Worker Liability - American Nuclear Insurers [Member]
 
Insurance aggregate maximum coverage
375,000,000 
Public Liability And Nuclear Worker Liability - Pool Participation [Member]
 
Insurance aggregate maximum coverage
12,219,000,000 2
Insurance maximum coverage per incident
118,000,000 3
Property Damage - Nuclear Electric Insurance Ltd [Member]
 
Insurance aggregate maximum coverage
2,750,000,000 4
Insurance maximum coverage per incident
23,000,000 
Replacement Power - Nuclear Electric Insurance Ltd [Member]
 
Insurance aggregate maximum coverage
490,000,000 5
Insurance maximum coverage per incident
9,000,000 
Replacement Power - Energy Risk Assurance Company [Member]
 
Insurance aggregate maximum coverage
$ 64,000,000 6
Commitments And Contingencies (Schedule Of Lease Obligations) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Commitments And Contingencies [Abstract]
 
 
 
Capital lease payments, 2012
$ 33 1 2
 
 
Capital lease payments, 2013
32 1 2
 
 
Capital lease payments, 2014
32 1 2
 
 
Capital lease payments, 2015
33 1 2
 
 
Capital lease payments, 2016
33 1 2
 
 
Capital lease payments, After 5 Years
458 1 2
 
 
Capital lease payments, Total
621 1 2
 
 
Less Amount representing interest, 2012
28 1
 
 
Less Amount representing interest, 2013
27 1
 
 
Less Amount representing interest, 2014
27 1
 
 
Less Amount representing interest, 2015
27 1
 
 
Less Amount representing interest, 2016
27 1
 
 
Less Amount representing interest, After 5 Years
176 1
 
 
Less Amount representing interest, Total
312 1
 
 
Present value of minimum capital lease payments, 2012
1
 
 
Present value of minimum capital lease payments, 2013
1
 
 
Present value of minimum capital lease payments, 2014
1
 
 
Present value of minimum capital lease payments, 2015
1
 
 
Present value of minimum capital lease payments, 2016
1
 
 
Present value of minimum capital lease payments, After 5 Years
282 1
 
 
Present value of minimum capital lease payments, Total
309 1
 
 
Operating leases, 2012
38 1 3
 
 
Operating leases, 2013
32 1 3
 
 
Operating leases, 2014
26 1 3
 
 
Operating leases, 2015
26 1 3
 
 
Operating leases, 2016
25 1 3
 
 
Operating leases, After 5 Years
160 1 3
 
 
Operating leases, Total
307 1 3
 
 
Total lease obligations, 2012
43 1
 
 
Total lease obligations, 2013
37 1
 
 
Total lease obligations, 2014
31 1
 
 
Total lease obligations, 2015
32 1
 
 
Total lease obligations, 2016
31 1
 
 
Total lease obligations, After 5 Years
442 1
 
 
Total lease obligations, Total
616 1
 
 
Annual obligation for real estate leases and railroad licenses
 
 
Total rental expense
$ 47 1
$ 52 1
$ 50 1
Commitments And Contingencies (Schedule Of Estimated Purchased Power Commitments) (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended
Feb. 29, 2012
MWH
Dec. 31, 2011
Note payable issued for investment
 
$ 17 
2012
 
1,972 1
2013
 
1,516 1
2014
 
1,211 1
2015
 
999 1
2016
 
930 1
Thereafter
 
2,486 1
Total
 
9,114 1
Megawatthours of energy products purchased in rate stability procuement
13,000,000 
 
Price per megawatthour of energy products purchased in rate stability procurement
31 
 
Coal [Member]
 
 
2012
 
1,120 1
2013
 
792 1
2014
 
692 1
2015
 
687 1
2016
 
674 1
Thereafter
 
968 1
Total
 
4,933 1
Natural Gas [Member]
 
 
2012
 
398 1
2013
 
295 1
2014
 
220 1
2015
 
116 1
2016
 
39 1
Thereafter
 
134 1
Total
 
1,202 1
Nuclear Fuel [Member]
 
 
2012
 
36 1
2013
 
37 1
2014
 
96 1
2015
 
90 1
2016
 
100 1
Thereafter
 
298 1
Total
 
657 1
Purchased Power [Member]
 
 
2012
 
196 1
2013
 
309 1
2014
 
125 1
2015
 
51 1
2016
 
52 1
Thereafter
 
746 1
Total
 
1,479 1
Methane Gas [Member]
 
 
2012
 
1
2013
 
1
2014
 
1
2015
 
1
2016
 
1
Thereafter
 
94 1
Total
 
107 1
Other [Member]
 
 
2012
 
221 1
2013
 
80 1
2014
 
75 1
2015
 
52 1
2016
 
62 1
Thereafter
 
246 1
Total
 
$ 736 1
Commitments And Contingencies (Environmental Matters) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Number of states participating in the cap-and-trade program
28 
 
Percent of top performing facilities
12.00% 
 
Property, plant and equipment, net
$ 18,127 1 2
$ 17,853 1 2
Ameren Illinois Company [Member]
 
 
Property, plant and equipment, net
4,770 
4,576 
Ameren Energy Generating Company [Member]
 
 
Property, plant and equipment, net
2,231 
2,248 
Estimated Capital Costs 2012 [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
210 
 
Estimated Capital Costs 2012 [Member] |
Ameren Energy Generating Company [Member]
 
 
Reduction in capital expenditure estimate for environmental compliance
150 
 
Estimated Capital Costs 2013 - 2016 [Member] |
Ameren Energy Generating Company [Member]
 
 
Reduction in capital expenditure estimate for environmental compliance
20 
 
Manufactured Gas Plant [Member]
 
 
Loss contingency range of possible loss minimum
107.0 
 
Loss contingency range of possible loss maximum
183 
 
Accrual for environmental loss contingencies
107.0 3
 
Manufactured Gas Plant [Member] |
Ameren Illinois Company [Member]
 
 
Number of remediation sites
44 
 
Manufactured Gas Plant [Member] |
Ameren Missouri [Member]
 
 
Number of remediation sites
10 
 
Former Coal Ash Landfill [Member] |
Ameren Illinois Company [Member]
 
 
Loss contingency range of possible loss minimum
0.5 
 
Loss contingency range of possible loss maximum
 
Accrual for environmental loss contingencies
0.5 
 
Other Environmental [Member] |
Ameren Illinois Company [Member]
 
 
Accrual for environmental loss contingencies
0.8 
 
Former Coal Tar Distillery [Member] |
Ameren Missouri [Member]
 
 
Loss contingency range of possible loss minimum
2.0 
 
Loss contingency range of possible loss maximum
 
Accrual for environmental loss contingencies
2.0 
 
Sauget Area 2 [Member] |
Ameren Missouri [Member]
 
 
Loss contingency range of possible loss minimum
0.3 
 
Loss contingency range of possible loss maximum
10 
 
Accrual for environmental loss contingencies
0.3 
 
Minimum [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
1,825 
 
Minimum [Member] |
Estimated Capital Costs 2013 - 2016 [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
445 
 
Minimum [Member] |
Estimated Capital Costs 2017 - 2021 [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
1,170 
 
Maximum [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
2,185 
 
Maximum [Member] |
Estimated Capital Costs 2013 - 2016 [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
550 
 
Maximum [Member] |
Estimated Capital Costs 2017 - 2021 [Member]
 
 
Estimated capital costs to comply with existing and known federal and state air emissions regulations
$ 1,425 
 
Commitments And Contingencies (Pumped-Storage Hydroelectric Facility Breach) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 73 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Commitments And Contingencies [Abstract]
 
 
 
 
Payments relating to Taum Sauk incident damage and cleanup
$ 209 
 
 
 
Payments relating to Taum Sauk incident damage and cleanup recorded to expense and not covered by insurance
37 
Cumulative payments relating to Taum Sauk incident damage and cleanup covered by insurance and recorded as a receivable
172 
 
 
172 
Cumulative liability insurance reimbursements received for Taum Sauk incident
104 
 
 
 
Insurance settlements receivable
$ 68 
 
 
$ 68 
Goodwill, Impairment And Other Charges (Narrative) (Details) (USD $)
12 Months Ended 1 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2011
Ameren Energy Generating Company [Member]
Dec. 31, 2010
Ameren Energy Generating Company [Member]
Dec. 31, 2009
Ameren Energy Generating Company [Member]
Dec. 31, 2009
Rail Line Extension Project [Member]
Dec. 31, 2009
Indian Trails Facility [Member]
Dec. 31, 2011
Taum Sauk Energy Center [Member]
Dec. 31, 2011
Meredosia And Hutsonville [Member]
Dec. 31, 2011
Closure of Meredosia and Hutsonville Energy Centers [Member]
Dec. 31, 2011
SO2 Emission Allowances [Member]
Dec. 31, 2010
SO2 Emission Allowances [Member]
Jul. 31, 2011
SO2 Emission Allowances [Member]
Ameren Missouri [Member]
Jul. 31, 2010
SO2 Emission Allowances [Member]
Ameren Missouri [Member]
Dec. 31, 2011
Facility Closing [Member]
Closure of Meredosia and Hutsonville Energy Centers [Member]
Dec. 31, 2010
Merchant Generation [Member]
Dec. 31, 2010
Merchant Generation [Member]
Ameren Energy Generating Company [Member]
Impairment charge on goodwill
 
$ 420,000,000 1 2
 
 
 
 
 
 
 
 
 
 
 
 
 
 
$ 420,000,000 
 
Number of employee positions eliminated
 
 
 
 
 
 
 
 
 
90 
 
 
 
 
 
 
 
 
Noncash impairment charge
125,000,000 1
589,000,000 1
7,000,000 1
35,000,000 
170,000,000 
6,000,000 3
 
 
 
 
 
 
 
 
 
 
 
65,000,000 
Non-cash impairment of materials and supplies
 
 
4,000,000 
 
 
 
 
 
 
 
4,000,000 
 
 
 
 
 
 
 
Severance costs
 
 
 
 
 
 
 
 
 
 
4,000,000 
 
 
 
 
 
 
 
Loss from regulatory disallowance
 
 
 
 
 
 
 
 
89,000,000 
 
 
 
 
 
 
 
 
 
Impairment charge on long-lived assets and related charges
123,000,000 1
101,000,000 1
7,000,000 1
 
 
 
6,000,000 
1,000,000 
 
 
 
 
 
 
 
26,000,000 
 
 
Pretax impairment charge
2,000,000 1
68,000,000 1
 
 
 
 
 
 
 
 
 
2,000,000 
68,000,000 
1,000,000 
23,000,000 
 
 
 
Expected tax benefits related to closure of plants
 
 
 
 
 
 
 
 
 
22,000,000 
 
 
 
 
 
 
 
 
Asset retirement obligations, noncurrent
428,000,000 
475,000,000 
 
66,000,000 
74,000,000 
 
 
 
 
 
38,000,000 
 
 
 
 
 
 
 
Expected tax benefits related to asset retirement obligations
 
 
 
 
 
 
 
 
 
 
$ 16,000,000 
 
 
 
 
 
 
 
Goodwill, Impairment And Other Charges (Summary Of Goodwill And Other Asset Impairment Pretax Charges) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Goodwill, Impairment And Other Charges [Abstract]
 
 
 
Impairment charge on goodwill
 
$ 420 1 2
 
Impairment charge on long-lived assets and related charges
123 1
101 1
1
Impairment charge on emission allowances
1
68 1
 
Total impairment charge
$ 125 1
$ 589 1
$ 7 1
Goodwill, Impairment And Other Charges (Reconciliation Of Goodwill) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2010
Dec. 31, 2011
Dec. 31, 2009
Gross goodwill
 
 
$ 831 1
Accumulated impairment losses
   1
 
 
Goodwill, net of accumulated impairment losses
831 1
 
 
Impairment losses during year
420 1 2
 
 
Goodwill, net of impairment losses
411 1
411 
 
Ameren Illinois Company [Member]
 
 
 
Gross goodwill
411 
 
411 
Accumulated impairment losses
   
   
 
Goodwill, net of accumulated impairment losses
411 
411 
 
Goodwill, net of impairment losses
411 
411 
 
Merchant Generation [Member]
 
 
 
Gross goodwill
 
 
420 
Accumulated impairment losses
   
 
 
Goodwill, net of accumulated impairment losses
420 
 
 
Impairment losses during year
$ 420 
 
 
Segment Information (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Segment Reporting Information [Line Items]
 
 
 
 
 
 
 
 
 
 
 
External revenues
$ 1,578 
$ 2,268 
$ 1,781 
$ 1,904 
$ 1,706 
$ 2,267 
$ 1,725 
$ 1,940 
$ 7,531 
$ 7,638 
$ 7,135 
Depreciation and amortization
 
 
 
 
 
 
 
 
785 
765 
725 
Interest and dividend income
 
 
 
 
 
 
 
 
32 
33 
30 
Interest charges
 
 
 
 
 
 
 
 
451 
497 
508 
Income taxes (benefit)
 
 
 
 
 
 
 
 
310 1
325 1
332 1
Net income (loss) attributable to Ameren Corporation
25 
285 
138 
71 
52 
(167)
152 
102 
519 2
139 2
612 2
Capital expenditures
 
 
 
 
 
 
 
 
1,030 
1,042 
1,710 
Total assets
23,645 
 
 
 
23,511 
 
 
 
23,645 
23,511 
23,702 
Ameren Missouri [Member]
 
 
 
 
 
 
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
 
 
 
 
 
 
External revenues
 
 
 
 
 
 
 
 
3,358 
3,176 
2,847 
Intersegment revenues
 
 
 
 
 
 
 
 
25 
21 
27 
Depreciation and amortization
 
 
 
 
 
 
 
 
408 
382 
357 
Interest and dividend income
 
 
 
 
 
 
 
 
30 
31 
29 
Interest charges
 
 
 
 
 
 
 
 
209 
213 
229 
Income taxes (benefit)
 
 
 
 
 
 
 
 
161 
199 
128 
Net income (loss) attributable to Ameren Corporation
 
 
 
 
 
 
 
 
287 2
364 2
259 2
Capital expenditures
 
 
 
 
 
 
 
 
550 
624 
882 
Total assets
12,757 
 
 
 
12,504 
 
 
 
12,757 
12,504 
12,219 
Ameren Illinois Company [Member]
 
 
 
 
 
 
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
 
 
 
 
 
 
External revenues
 
 
 
 
 
 
 
 
2,774 
3,002 
2,957 
Intersegment revenues
 
 
 
 
 
 
 
 
13 
12 
27 
Depreciation and amortization
 
 
 
 
 
 
 
 
215 
210 
216 
Interest and dividend income
 
 
 
 
 
 
 
 
Interest charges
 
 
 
 
 
 
 
 
136 
143 
153 
Income taxes (benefit)
 
 
 
 
 
 
 
 
127 
137 
79 
Net income (loss) attributable to Ameren Corporation
 
 
 
 
 
 
 
 
193 2
208 2
127 2
Capital expenditures
 
 
 
 
 
 
 
 
351 
281 
352 
Total assets
7,213 
 
 
 
7,406 
 
 
 
7,213 
7,406 
7,181 
Merchant Generation [Member]
 
 
 
 
 
 
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
 
 
 
 
 
 
External revenues
 
 
 
 
 
 
 
 
1,394 
1,459 
1,322 
Intersegment revenues
 
 
 
 
 
 
 
 
235 
234 
390 
Depreciation and amortization
 
 
 
 
 
 
 
 
143 
146 
126 
Interest and dividend income
 
 
 
 
 
 
 
 
 
 
Interest charges
 
 
 
 
 
 
 
 
105 
133 
119 
Income taxes (benefit)
 
 
 
 
 
 
 
 
32 
151 
Net income (loss) attributable to Ameren Corporation
 
 
 
 
 
 
 
 
45 2
(409)2
247 2
Capital expenditures
 
 
 
 
 
 
 
 
153 
101 
408 
Total assets
3,833 
 
 
 
3,934 
 
 
 
3,833 
3,934 
4,751 
Other Segment [Member]
 
 
 
 
 
 
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
 
 
 
 
 
 
External revenues
 
 
 
 
 
 
 
 
Intersegment revenues
 
 
 
 
 
 
 
 
13 
19 
Depreciation and amortization
 
 
 
 
 
 
 
 
19 
27 
26 
Interest and dividend income
 
 
 
 
 
 
 
 
44 
25 
33 
Interest charges
 
 
 
 
 
 
 
 
44 
35 
48 
Income taxes (benefit)
 
 
 
 
 
 
 
 
(10)
(17)
(26)
Net income (loss) attributable to Ameren Corporation
 
 
 
 
 
 
 
 
(6)2
(24)2
(21)2
Capital expenditures
 
 
 
 
 
 
 
 
(24)2
36 
68 
Total assets
1,211 
 
 
 
1,354 
 
 
 
1,211 
1,354 
1,814 
Intersegment Elimination [Member]
 
 
 
 
 
 
 
 
 
 
 
Segment Reporting Information [Line Items]
 
 
 
 
 
 
 
 
 
 
 
Intersegment revenues
 
 
 
 
 
 
 
 
(277)
(280)
(463)
Interest and dividend income
 
 
 
 
 
 
 
 
(43)
(25)
(38)
Interest charges
 
 
 
 
 
 
 
 
(43)
(27)
(41)
Total assets
$ (1,369)
 
 
 
$ (1,687)
 
 
 
$ (1,369)
$ (1,687)
$ (2,263)
Selected Quarterly Information (Summary Of Selected Quarterly Information) (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Selected Quarterly Information [Abstract]
 
 
 
 
 
 
 
 
 
 
 
Operating revenue
$ 1,578 
$ 2,268 
$ 1,781 
$ 1,904 
$ 1,706 
$ 2,267 
$ 1,725 
$ 1,940 
$ 7,531 
$ 7,638 
$ 7,135 
Operating Income
148 
550 
316 
227 
198 
89 
331 
298 
1,241 
916 
1,416 
Net income (loss) attributable to Ameren Corporation
$ 25 
$ 285 
$ 138 
$ 71 
$ 52 
$ (167)
$ 152 
$ 102 
$ 519 1
$ 139 1
$ 612 1
Earnings per Common Share - Basic and Diluted
$ 0.10 
$ 1.18 
$ 0.57 
$ 0.29 
$ 0.21 
$ (0.70)
$ 0.64 
$ 0.43 
$ 2.15 
$ 0.58 
$ 2.78 
Schedule I - Condensed Financial Information Of Parent (Statement of Income) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Mar. 31, 2010
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating revenue
$ 1,578 
$ 2,268 
$ 1,781 
$ 1,904 
$ 1,706 
$ 2,267 
$ 1,725 
$ 1,940 
$ 7,531 
$ 7,638 
$ 7,135 
Goodwill and other impairment charges
 
 
 
 
 
 
 
 
125 1
589 1
1
Operating expenses
 
 
 
 
 
 
 
 
6,290 
6,722 
5,719 
Operating income (loss)
148 
550 
316 
227 
198 
89 
331 
298 
1,241 
916 
1,416 
Interest income affiliates
 
 
 
 
 
 
 
 
2
2
2
Miscellaneous income
 
 
 
 
 
 
 
 
69 2
90 2
71 2
Interest charges
 
 
 
 
 
 
 
 
451 
497 
508 
Income tax (benefit)
 
 
 
 
 
 
 
 
310 3
325 3
332 3
Net Income
25 
285 
138 
71 
52 
(167)
152 
102 
519 4
139 4
612 4
Parent Company [Member]
 
 
 
 
 
 
 
 
 
 
 
Goodwill and other impairment charges
 
 
 
 
 
 
 
 
 
372 
 
Operating expenses
 
 
 
 
 
 
 
 
15 
24 
20 
Operating income (loss)
 
 
 
 
 
 
 
 
(15)
(396)
(20)
Equity in earnings of subsidiaries
 
 
 
 
 
 
 
 
527 
535 
625 
Interest income affiliates
 
 
 
 
 
 
 
 
44 
28 
36 
Miscellaneous income
 
 
 
 
 
 
 
 
Interest charges
 
 
 
 
 
 
 
 
41 
56 
37 
Income tax (benefit)
 
 
 
 
 
 
 
 
(8)
(31)
(12)
Net Income
 
 
 
 
 
 
 
 
$ 519 
$ 139 
$ 612 
Schedule I - Condensed Financial Information Of Parent (Balance Sheet) (Details) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Dec. 31, 2008
ASSETS
 
 
 
 
Cash and equivalents
$ 255 
$ 545 
$ 622 
$ 92 
Accounts and notes receivable affiliates
473 
517 
 
 
Other current assets
132 
109 
 
 
Total current assets
2,295 
2,890 
 
 
Other
845 
750 
 
 
TOTAL ASSETS
23,645 
23,511 
23,702 
 
LIABILITIES AND EQUITY
 
 
 
 
Short-term debt
148 
269 
 
 
Other current liabilities
207 
283 
 
 
Total current liabilities
1,785 
1,888 
 
 
Credit facility borrowings
 
460 
 
 
Long-term debt
6,677 
6,853 
 
 
Other deferred credits and other noncurrent liabilities
447 
615 
 
 
Commitments and Contingencies
   
   
 
 
Retained earnings
2,369 
2,225 
 
 
Stockholders' equity
8,068 
7,884 
8,060 
 
TOTAL LIABILITIES AND EQUITY
23,645 
23,511 
 
 
Parent Company [Member]
 
 
 
 
ASSETS
 
 
 
 
Cash and equivalents
24 
22 
Advances to money pool
340 
64 
 
 
Accounts and notes receivable affiliates
57 
405 
 
 
Other current assets
 
 
 
Total current assets
400 
475 
 
 
Investments in subsidiaries
7,532 
7,681 
 
 
Intercompany note receivable
425 
425 
 
 
Other
333 
403 
 
 
TOTAL ASSETS
8,690 
8,984 
 
 
LIABILITIES AND EQUITY
 
 
 
 
Short-term debt
148 
269 
 
 
Accounts payable affiliates
13 
41 
 
 
Other current liabilities
62 
75 
 
 
Total current liabilities
223 
385 
 
 
Credit facility borrowings
 
360 
 
 
Long-term debt
424 
423 
 
 
Other deferred credits and other noncurrent liabilities
74 
69 
 
 
Total liabilities
721 
1,237 
 
 
Commitments and Contingencies
   
   
 
 
Common stock, $.01 par value, 400.0 shares authorized shares outstanding of 242.6 and 240.4, respectively
 
 
Other paid-in capital
5,598 
5,520 
 
 
Retained earnings
2,369 
2,225 
 
 
Stockholders' equity
7,969 
7,747 
 
 
TOTAL LIABILITIES AND EQUITY
$ 8,690 
$ 8,984 
 
 
Schedule I - Condensed Financial Information Of Parent (Statement of Cash Flows) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net cash provided by operating activities
$ 1,878 
$ 1,823 
$ 1,967 
Cash Flows From Investing Activities:
 
 
 
Other
12 
Net cash used in investing activities
(1,048)
(1,096)
(1,781)
Cash Flows From Financing Activities:
 
 
 
Dividends on common stock
(375)
(368)
(338)
Short-term and credit facility borrowings, net
(581)
(121)
(324)
Issuances:
 
 
 
Long-term debt
 
 
1,021 
Common stock
65 
80 
634 
Net cash provided by (used in) financing activities
(1,120)
(804)
344 
Net change in cash and equivalents
(290)
(77)
530 
Cash and cash equivalents at beginning of year
545 
622 
92 
Cash and cash equivalents at end of year
255 
545 
622 
Parent Company [Member]
 
 
 
Net cash provided by operating activities
804 
241 
270 
Cash Flows From Investing Activities:
 
 
 
Money pool advances, net
(276)
18 
300 
Intercompany notes receivable, net
358 
242 
(712)
Investments in subsidiaries
(94)
(13)
(831)
Other
(2)
 
Net cash used in investing activities
(14)
248 
(1,243)
Cash Flows From Financing Activities:
 
 
 
Dividends on common stock
(375)
(368)
(338)
Short-term and credit facility borrowings, net
(481)
(221)
275 
Issuances:
 
 
 
Long-term debt
 
 
423 
Common stock
65 
80 
634 
Other
 
 
(19)
Net cash provided by (used in) financing activities
(791)
(509)
975 
Net change in cash and equivalents
(1)
(20)
Cash and cash equivalents at beginning of year
24 
22 
Cash and cash equivalents at end of year
24 
Cash dividends received from consolidated subsidiaries
$ 730 
$ 368 
$ 338 
Schedule I - Condensed Financial Information Of Parent (Restatements) (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Net cash provided by operating activities
$ 1,878 
$ 1,823 
$ 1,967 
Net cash used in investing activities
(1,048)
(1,096)
(1,781)
Parent Company [Member]
 
 
 
Net cash provided by operating activities
804 
241 
270 
Net cash used in investing activities
(14)
248 
(1,243)
Previously Reported [Member]
 
 
 
Net cash provided by operating activities
 
522 
442 
Net cash used in investing activities
 
33 
531 
Restatement Adjustment [Member]
 
 
 
Net cash provided by operating activities
 
241 
270 
Net cash used in investing activities
 
$ 248 
$ 1,243 
Schedule II - Valuation And Qualifying Accounts (Details) (Allowance For Doubtful Accounts [Member], USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Allowance For Doubtful Accounts [Member]
 
 
 
Balance at beginning of period
$ 23 
$ 24 
$ 28 
Charged to costs and expenses
41 
33 
37 
Deductions
44 1
34 1
41 1
Balance at end of period
$ 20 
$ 23 
$ 24