DTE ELECTRIC CO, 10-Q filed on 7/28/2020
Quarterly Report
v3.20.2
Document and Entity Information
 6 Months Ended
Jun. 30, 2020
shares
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Jun. 30, 2020
Document Transition Report false
Entity File Number 1-11607
Entity Registrant Name DTE Energy Co
Entity Incorporation, State or Country Code MI
Entity Tax Identification Number 38-3217752
Entity Address, Address Line One One Energy Plaza
Entity Address, City or Town Detroit
Entity Address, State or Province MI
Entity Address, Postal Zip Code 48226-1279
City Area Code 313
Local Phone Number 235-4000
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Large Accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 192,650,741
Entity Central Index Key 0000936340
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2020
Document Fiscal Period Focus Q2
Amendment Flag false
DTE Electric  
Entity File Number 1-2198
Entity Registrant Name DTE Electric Co
Entity Incorporation, State or Country Code MI
Entity Tax Identification Number 38-0478650
Entity Current Reporting Status Yes
Entity Interactive Data Current Yes
Entity Filer Category Non-accelerated Filer
Entity Small Business false
Entity Emerging Growth Company false
Entity Shell Company false
Entity Common Stock, Shares Outstanding 138,632,324
Entity Central Index Key 0000028385
Common stock, without par value  
Title of 12(b) Security Common stock, without par value
Trading Symbol DTE
Security Exchange Name NYSE
2012 Series C 5.25% Junior Subordinated Debentures due 2062  
Title of 12(b) Security 2012 Series C 5.25% Junior Subordinated Debentures due 2062
Trading Symbol DTQ
Security Exchange Name NYSE
2016 Series B 5.375% Junior Subordinated Debentures due 2076  
Title of 12(b) Security 2016 Series B 5.375% Junior Subordinated Debentures due 2076
Trading Symbol DTJ
Security Exchange Name NYSE
2016 Series F 6.00% Junior Subordinated Debentures due 2076  
Title of 12(b) Security 2016 Series F 6.00% Junior Subordinated Debentures due 2076
Trading Symbol DTY
Security Exchange Name NYSE
2017 Series E 5.25% Junior Subordinated Debentures due 2077  
Title of 12(b) Security 2017 Series E 5.25% Junior Subordinated Debentures due 2077
Trading Symbol DTW
Security Exchange Name NYSE
2019 6.25% Corporate Units  
Title of 12(b) Security 2019 6.25% Corporate Units
Trading Symbol DTP
Security Exchange Name NYSE
v3.20.2
Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Operating Revenues        
Utility operations $ 1,542 $ 1,417 $ 3,275 $ 3,281
Non-utility operations 1,041 1,471 2,330 3,121
Operating Revenues 2,583 2,888 5,605 6,402
Operating Expenses        
Fuel, purchased power, and gas — utility 374 360 841 942
Fuel, purchased power, and gas — non-utility 789 1,258 1,757 2,643
Operation and maintenance 564 560 1,143 1,151
Depreciation and amortization 350 305 703 601
Taxes other than income 84 92 203 210
Asset (gains) losses and impairments, net 55 13 45 13
Operating Expenses 2,216 2,588 4,692 5,560
Operating Income 367 300 913 842
Other (Income) and Deductions        
Interest expense 179 154 354 306
Interest income (6) (3) (16) (7)
Non-operating retirement benefits, net 6 10 15 19
Other income (101) (73) (166) (161)
Other expenses 6 12 52 23
Other (Income) and Deductions 84 100 239 180
Income Before Income Taxes 283 200 674 662
Income Tax Expense 6 21 55 75
Net Income 277 179 619 587
Less: Net Income (Loss) Attributable to Noncontrolling Interests 0 (3) 2 4
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 277 $ 182 $ 617 $ 583
Basic Earnings per Common Share        
Net Income Attributable to DTE Energy Company (in dollars per share) $ 1.44 $ 0.99 $ 3.20 $ 3.19
Diluted Earnings per Common Share        
Net Income Attributable to DTE Energy Company (in dollars per share) $ 1.44 $ 0.99 $ 3.20 $ 3.18
Weighted Average Common Shares Outstanding        
Basic (in shares) 192 183 192 183
Diluted (in shares) 193 184 192 183
DTE Electric        
Operating Revenues        
Utility operations $ 1,309 $ 1,190 $ 2,521 $ 2,425
Operating Expenses        
Fuel, purchased power, and gas — utility 342 322 639 668
Operation and maintenance 353 334 713 692
Depreciation and amortization 252 229 510 450
Taxes other than income 58 69 141 153
Asset (gains) losses and impairments, net 41 13 41 13
Operating Expenses 1,046 967 2,044 1,976
Operating Income 263 223 477 449
Other (Income) and Deductions        
Interest expense 85 78 166 154
Interest income 0 0 (2) (1)
Other income (37) (25) (50) (58)
Other expenses 7 12 48 20
Other (Income) and Deductions 55 65 162 115
Income Before Income Taxes 208 158 315 334
Income Tax Expense 25 25 38 54
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 183 $ 133 $ 277 $ 280
v3.20.2
Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Net Income $ 277 $ 179 $ 619 $ 587
Net Income 277 182 617 583
Other comprehensive income (loss), net of tax:        
Benefit obligations, net of taxes of $1, $1, $2, and $2 respectively 2 3 5 7
Net unrealized gains (losses) on derivatives during the period, net of taxes of $1, $(2), $1, and $(3), respectively 1 (6) 2 (9)
Foreign currency translation 1 0 0 1
Other comprehensive income (loss) 4 (3) 7 (1)
Comprehensive income 281 176 626 586
Less: Comprehensive income (loss) attributable to noncontrolling interests 0 (3) 2 4
Comprehensive Income Attributable to DTE Energy Company/DTE Electric Company 281 179 624 582
Tax effect on benefit obligation 1 1 2 2
Tax effect on net unrealized losses on derivatives during the period 1 (2) 1 (3)
DTE Electric        
Net Income 183 133 277 280
Other comprehensive income (loss), net of tax:        
Other comprehensive income (loss) 0 0 0 0
Comprehensive Income Attributable to DTE Energy Company/DTE Electric Company $ 183 $ 133 $ 277 $ 280
v3.20.2
Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Statement of Comprehensive Income [Abstract]        
Tax effect on benefit obligation $ 1 $ 1 $ 2 $ 2
Tax effect on net unrealized losses on derivatives during the period $ 1 $ (2) $ 1 $ (3)
v3.20.2
Consolidated Statements of Financial Position (Unaudited) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Current Assets    
Cash and cash equivalents $ 579 $ 93
Restricted cash 42 0
Accounts receivable (less allowance for doubtful accounts)    
Customer 1,375 1,642
Other 371 245
Inventories    
Fuel and gas 349 373
Materials and supplies 436 386
Derivative assets 105 133
Regulatory assets 59 5
Other 181 209
Total Current Assets 3,497 3,086
Investments    
Nuclear decommissioning trust funds 1,603 1,661
Investments in equity method investees 1,855 1,862
Other 256 265
Total Investments 3,714 3,788
Property    
Property, plant, and equipment 36,684 35,072
Accumulated depreciation and amortization (9,960) (9,755)
Property, plant, and equipment, net 26,724 25,317
Other Assets    
Goodwill 2,465 2,464
Regulatory assets 4,239 4,171
Intangible assets 2,380 2,393
Notes receivable 228 202
Derivative assets 43 41
Prepaid postretirement costs 113 69
Operating lease right-of-use assets 161 169
Other 175 182
Total Other Assets 9,804 9,691
Total Assets 43,739 41,882
Accounts payable    
Accounts payable 1,025 1,076
Accrued interest 159 147
Dividends payable 390 195
Short-term borrowings 914 828
Current portion long-term debt, including finance leases 670 687
Derivative liabilities 52 83
Gas inventory equalization 29 0
Regulatory liabilities 25 65
Short-term borrowings    
Operating lease liabilities 32 33
Acquisition related deferred payment 384 379
Other 516 504
Total Current Liabilities 4,196 3,997
Long-Term Debt (net of current portion)    
Mortgage bonds, notes, and other 16,186 14,778
Junior subordinated debentures 1,146 1,146
Finance lease liabilities 9 11
Total Long-Term Debt (net of current portion) 17,341 15,935
Other Liabilities    
Deferred income taxes 2,650 2,315
Regulatory liabilities 3,203 3,264
Asset retirement obligations 2,754 2,672
Unamortized investment tax credit 163 166
Derivative liabilities 33 86
Accrued pension liability 779 808
Nuclear decommissioning 241 249
Operating lease liabilities 121 127
Other 366 427
Total Other Liabilities 10,310 10,114
Commitments and Contingencies (Notes 6 and 13)
Equity    
Common stock 5,247 5,233
Retained earnings 6,618 6,587
Accumulated other comprehensive loss (141) (148)
Total DTE Energy/DTE Electric Company Equity 11,724 11,672
Noncontrolling interests 168 164
Total Equity 11,892 11,836
Total Liabilities and Equity 43,739 41,882
DTE Electric    
Current Assets    
Cash and cash equivalents 336 12
Accounts receivable (less allowance for doubtful accounts)    
Customer 763 729
Affiliates 23 25
Other 71 41
Inventories    
Fuel and gas 206 187
Materials and supplies 293 280
Regulatory assets 57 5
Other 70 78
Total Current Assets 1,819 1,357
Investments    
Nuclear decommissioning trust funds 1,603 1,661
Other 37 38
Total Investments 1,640 1,699
Property    
Property, plant, and equipment 25,213 24,279
Accumulated depreciation and amortization (6,823) (6,706)
Property, plant, and equipment, net 18,390 17,573
Other Assets    
Regulatory assets 3,545 3,448
Intangible assets 15 15
Prepaid postretirement costs — affiliates 266 266
Operating lease right-of-use assets 81 87
Other 134 143
Total Other Assets 4,041 3,959
Total Assets 25,890 24,588
Accounts payable    
Affiliates 52 59
Other 438 406
Accrued interest 93 84
Current portion long-term debt, including finance leases 619 636
Regulatory liabilities 13 40
Short-term borrowings    
Affiliates 107 97
Other 200 354
Operating lease liabilities 12 12
Other 168 155
Total Current Liabilities 1,702 1,843
Long-Term Debt (net of current portion)    
Mortgage bonds, notes, and other 7,951 6,548
Finance lease liabilities 2 4
Total Long-Term Debt (net of current portion) 7,953 6,552
Other Liabilities    
Deferred income taxes 2,422 2,355
Regulatory liabilities 2,498 2,546
Asset retirement obligations 2,522 2,447
Unamortized investment tax credit 163 166
Nuclear decommissioning 241 249
Accrued pension liability — affiliates 704 717
Accrued postretirement liability — affiliates 338 367
Operating lease liabilities 62 67
Other 82 84
Total Other Liabilities 9,032 8,998
Commitments and Contingencies (Notes 6 and 13)
Equity    
Common stock 4,811 4,811
Retained earnings 2,392 2,384
Total DTE Energy/DTE Electric Company Equity 7,203 7,195
Total Liabilities and Equity $ 25,890 $ 24,588
v3.20.2
Consolidated Statements of Financial Position (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Allowance for doubtful accounts $ 84 $ 91
Shareholder’s Equity    
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 192,650,741 192,208,533
Common stock, shares outstanding (in shares) 192,650,741 192,208,533
DTE Electric    
Allowance for doubtful accounts $ 44 $ 46
Shareholder’s Equity    
Par value (in dollars per share) $ 10 $ 10
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 138,632,324 138,632,324
Common stock, shares outstanding (in shares) 138,632,324 138,632,324
v3.20.2
Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Operating Activities    
Net Income $ 619 $ 587
Net Income 617 583
Adjustments to reconcile Net Income to Net cash from operating activities:    
Depreciation and amortization 703 601
Nuclear fuel amortization 13 30
Allowance for equity funds used during construction (13) (13)
Deferred income taxes 286 80
Equity earnings of equity method investees (59) (43)
Dividends from equity method investees 81 89
Asset (gains) losses and impairments, net 49 13
Changes in assets and liabilities:    
Accounts receivable, net 156 369
Inventories (24) 46
Prepaid postretirement benefit costs (44) (38)
Accounts payable (78) (247)
Gas inventory equalization 29 45
Accrued pension liability (29) (122)
Derivative assets and liabilities (58) (20)
Regulatory assets and liabilities (67) 142
Other current and noncurrent assets and liabilities 117 (152)
Net cash from operating activities 1,681 1,367
Investing Activities    
Plant and equipment expenditures — utility (1,599) (1,294)
Plant and equipment expenditures — non-utility (424) (102)
Acquisitions related to business combinations, net of cash acquired (126) 0
Proceeds from sale of assets 4 0
Proceeds from sale of nuclear decommissioning trust fund assets 1,238 396
Investment in nuclear decommissioning trust funds (1,238) (399)
Distributions from equity method investees 6 5
Contributions to equity method investees (17) (38)
Notes receivable (24) (62)
Other (5) (20)
Net cash used for investing activities (2,185) (1,514)
Financing Activities    
Issuance of long-term debt, net of issuance costs 1,685 1,438
Redemption of long-term debt (300) 0
Short-term borrowings, net 86  
Short-term borrowings, net   (606)
Dividends paid on common stock (390) (345)
Contributions from noncontrolling interests, principally REF entities 15 17
Distributions to noncontrolling interests (13) (31)
Purchases of noncontrolling interest, principally SGG 0 (300)
Other (51) (40)
Net cash from financing activities 1,032 133
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 528 (14)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 93 76
Cash, Cash Equivalents, and Restricted Cash at End of Period 621 62
Supplemental disclosure of non-cash investing and financing activities    
Plant and equipment expenditures in accounts payable 340 270
DTE Electric    
Operating Activities    
Net Income 277 280
Adjustments to reconcile Net Income to Net cash from operating activities:    
Depreciation and amortization 510 450
Nuclear fuel amortization 13 30
Allowance for equity funds used during construction (12) (12)
Deferred income taxes 26 38
Asset (gains) losses and impairments, net 41 13
Changes in assets and liabilities:    
Accounts receivable, net (62) 53
Inventories (32) (12)
Accounts payable 42 (13)
Accrued pension liability — affiliates (13) (105)
Accrued postretirement liability — affiliates (29) (24)
Regulatory assets and liabilities (91) 137
Other current and noncurrent assets and liabilities 87 (169)
Net cash from operating activities 757 666
Investing Activities    
Plant and equipment expenditures (1,381) (1,073)
Proceeds from sale of nuclear decommissioning trust fund assets 1,238 396
Investment in nuclear decommissioning trust funds (1,238) (399)
Notes receivable (2) (5)
Other (4) (19)
Net cash used for investing activities (1,387) (1,100)
Financing Activities    
Issuance of long-term debt, net of issuance costs 1,685 643
Redemption of long-term debt (300) 0
Short-term borrowings, net — affiliate 10 194
Short-term borrowings, net — other (154) (149)
Dividends paid on common stock (269) (247)
Other (18) (16)
Net cash from financing activities 954 425
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash 324 (9)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 12 18
Cash, Cash Equivalents, and Restricted Cash at End of Period 336 9
Supplemental disclosure of non-cash investing and financing activities    
Plant and equipment expenditures in accounts payable $ 170 $ 159
v3.20.2
Consolidated Statements of Changes in Equity (Unaudited) - USD ($)
$ in Millions
Total
Implementation of ASU
Common Stock
Retained Earnings
Retained Earnings
Implementation of ASU
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss)
Implementation of ASU
Noncontrolling Interests
DTE Electric
DTE Electric
Common Stock
DTE Electric
Additional Paid-in Capital
DTE Electric
Retained Earnings
Beginning Balance (in shares) at Dec. 31, 2018     181,925,000             138,632,000    
Beginning Balance at Dec. 31, 2018 $ 10,717 $ 0 $ 4,245 $ 6,112 $ 25 $ (120) $ (25) $ 480        
Beginning Balance at Dec. 31, 2018                 $ 6,793 $ 1,386 $ 3,245 $ 2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income                 147     147
Net Income (Loss) 408     401       7        
Dividends declared on common stock (173)     (173)         (124)     (124)
Contribution of common stock to pension plan (in shares)     815,000                  
Contribution of common stock to pension plan 100   $ 100                  
Other comprehensive income (loss), net of tax 2         2            
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)     472,000                  
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other (34)   $ (21) (1)       (12)        
Ending Balance (in shares) at Mar. 31, 2019     183,212,000             138,632,000    
Ending Balance at Mar. 31, 2019 11,020   $ 4,324 6,364   (143)   475        
Ending Balance at Mar. 31, 2019                 6,816 $ 1,386 3,245 2,185
Beginning Balance (in shares) at Dec. 31, 2018     181,925,000             138,632,000    
Beginning Balance at Dec. 31, 2018 10,717 0 $ 4,245 6,112 25 (120) (25) 480        
Beginning Balance at Dec. 31, 2018                 6,793 $ 1,386 3,245 2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income 583               280      
Net Income (Loss) 587                      
Other comprehensive income (loss), net of tax (1)               0      
Ending Balance (in shares) at Jun. 30, 2019     183,302,000             138,632,000    
Ending Balance at Jun. 30, 2019 10,569   $ 4,344 6,198   (146)   173        
Ending Balance at Jun. 30, 2019                 6,826 $ 1,386 3,245 2,195
Beginning Balance (in shares) at Dec. 31, 2018     181,925,000             138,632,000    
Beginning Balance at Dec. 31, 2018 $ 10,717 $ 0 $ 4,245 6,112 $ 25 (120) $ (25) 480        
Beginning Balance at Dec. 31, 2018                 $ 6,793 $ 1,386 3,245 2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Implementation of ASU us-gaap:AccountingStandardsUpdate201802Member                      
Ending Balance (in shares) at Dec. 31, 2019 192,208,533   192,209,000           138,632,324 138,632,000    
Ending Balance at Dec. 31, 2019 $ 11,836   $ 5,233 6,587   (148)   164        
Ending Balance at Dec. 31, 2019 11,672               $ 7,195 $ 1,386 3,425 2,384
Beginning Balance (in shares) at Mar. 31, 2019     183,212,000             138,632,000    
Beginning Balance at Mar. 31, 2019 11,020   $ 4,324 6,364   (143)   475        
Beginning Balance at Mar. 31, 2019                 6,816 $ 1,386 3,245 2,185
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income 182               133     133
Net Income (Loss) 179     182       (3)        
Dividends declared on common stock (347)     (347)         (123)     (123)
Other comprehensive income (loss), net of tax (3)         (3)     0      
Purchase of noncontrolling interests, principally SGG (300)   $ (3)         (297)        
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)     90,000                  
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other 20   $ 23 (1)       (2)        
Ending Balance (in shares) at Jun. 30, 2019     183,302,000             138,632,000    
Ending Balance at Jun. 30, 2019 $ 10,569   $ 4,344 6,198   (146)   173        
Ending Balance at Jun. 30, 2019                 $ 6,826 $ 1,386 3,245 2,195
Beginning Balance (in shares) at Dec. 31, 2019 192,208,533   192,209,000           138,632,324 138,632,000    
Beginning Balance at Dec. 31, 2019 $ 11,836   $ 5,233 6,587   (148)   164        
Beginning Balance at Dec. 31, 2019 11,672               $ 7,195 $ 1,386 3,425 2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income                 94     94
Net Income (Loss) 342     340       2        
Dividends declared on common stock (195)     (195)         (135)     (135)
Other comprehensive income (loss), net of tax 3         3            
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)     403,000                  
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other 2   $ 2                  
Ending Balance (in shares) at Mar. 31, 2020     192,612,000             138,632,000    
Ending Balance at Mar. 31, 2020 $ 11,988   $ 5,235 6,732   (145)   166        
Ending Balance at Mar. 31, 2020                 $ 7,154 $ 1,386 3,425 2,343
Beginning Balance (in shares) at Dec. 31, 2019 192,208,533   192,209,000           138,632,324 138,632,000    
Beginning Balance at Dec. 31, 2019 $ 11,836   $ 5,233 6,587   (148)   164        
Beginning Balance at Dec. 31, 2019 11,672               $ 7,195 $ 1,386 3,425 2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income 617               277      
Net Income (Loss) 619                      
Other comprehensive income (loss), net of tax $ 7               $ 0      
Ending Balance (in shares) at Jun. 30, 2020 192,650,741   192,651,000           138,632,324 138,632,000    
Ending Balance at Jun. 30, 2020 $ 11,892   $ 5,247 6,618   (141)   168        
Ending Balance at Jun. 30, 2020 11,724               $ 7,203 $ 1,386 3,425 2,392
Beginning Balance (in shares) at Mar. 31, 2020     192,612,000             138,632,000    
Beginning Balance at Mar. 31, 2020 11,988   $ 5,235 6,732   (145)   166        
Beginning Balance at Mar. 31, 2020                 7,154 $ 1,386 3,425 2,343
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income 277               183     183
Net Income (Loss) 277     277       0        
Dividends declared on common stock (390)     (390)         (134)     (134)
Other comprehensive income (loss), net of tax 4         4     $ 0      
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)     39,000                  
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other $ 13   $ 12 (1)       2        
Ending Balance (in shares) at Jun. 30, 2020 192,650,741   192,651,000           138,632,324 138,632,000    
Ending Balance at Jun. 30, 2020 $ 11,892   $ 5,247 $ 6,618   $ (141)   $ 168        
Ending Balance at Jun. 30, 2020 $ 11,724               $ 7,203 $ 1,386 $ 3,425 $ 2,392
v3.20.2
Consolidated Statements of Changes in Equity (Unaudited) (Parenthetical) - $ / shares
 3 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Statement of Stockholders' Equity [Abstract]        
Dividends declared on common stock (in dollars per share) $ 2.03 $ 1.01 $ 1.89 $ 0.95
v3.20.2
Organization and Basis of Presentation
 6 Months Ended
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Organization and Basis of Presentation ORGANIZATION AND BASIS OF PRESENTATION
Corporate Structure
DTE Energy owns the following businesses:
•DTE Electric is a public utility engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.2 million customers in southeastern Michigan;
•DTE Gas is a public utility engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.3 million customers throughout Michigan and the sale of storage and transportation capacity; and
•Other businesses primarily involved in 1) services related to the gathering, transportation, and storage of natural gas; 2) power and industrial projects; and 3) energy marketing and trading operations.
DTE Electric and DTE Gas are regulated by the MPSC. Certain activities of DTE Electric and DTE Gas, as well as various other aspects of businesses under DTE Energy, are regulated by the FERC. In addition, the Registrants are regulated by other federal and state regulatory agencies including the NRC, the EPA, the EGLE, and for DTE Energy, the CFTC.
Basis of Presentation
The Consolidated Financial Statements should be read in conjunction with the Combined Notes to Consolidated Financial Statements included in the combined DTE Energy and DTE Electric 2019 Annual Report on Form 10-K.
The accompanying Consolidated Financial Statements of the Registrants are prepared using accounting principles generally accepted in the United States of America. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from the Registrants' estimates.
The Consolidated Financial Statements are unaudited but, in the Registrants' opinions, include all adjustments necessary to present a fair statement of the results for the interim periods. All adjustments are of a normal recurring nature, except as otherwise disclosed in these Consolidated Financial Statements and Combined Notes to Consolidated Financial Statements. Financial results for this interim period are not necessarily indicative of results that may be expected for any other interim period or for the fiscal year ending December 31, 2020.
The information in these combined notes relates to each of the Registrants as noted in the Index of Combined Notes to Consolidated Financial Statements. However, DTE Electric does not make any representation as to information related solely to DTE Energy or the subsidiaries of DTE Energy other than itself.
Principles of Consolidation
The Registrants consolidate all majority-owned subsidiaries and investments in entities in which they have controlling influence. Non-majority owned investments are accounted for using the equity method when the Registrants are able to significantly influence the operating policies of the investee. When the Registrants do not influence the operating policies of an investee, the cost method is used. These Consolidated Financial Statements also reflect the Registrants' proportionate interests in certain jointly-owned utility plants. The Registrants eliminate all intercompany balances and transactions.
The Registrants evaluate whether an entity is a VIE whenever reconsideration events occur. The Registrants consolidate VIEs for which they are the primary beneficiary. If a Registrant is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, a Registrant considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. The Registrants perform ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed.
Legal entities within DTE Energy's Power and Industrial Projects segment enter into long-term contractual arrangements with customers to supply energy-related products or services. The entities are generally designed to pass-through the commodity risk associated with these contracts to the customers, with DTE Energy retaining operational and customer default risk. These entities generally are VIEs and consolidated when DTE Energy is the primary beneficiary. In addition, DTE Energy has interests in certain VIEs through which control of all significant activities is shared with partners, and therefore are generally accounted for under the equity method.
DTE Energy currently owns an 85% interest in SGG, which owns and operates midstream natural gas assets. SGG has contracts through which certain construction risk is designed to pass-through to the customers, with DTE Energy retaining operational and customer default risk. SGG is a VIE with DTE Energy as the primary beneficiary.
The Registrants have variable interests in NEXUS, which include DTE Energy's 50% ownership interest and DTE Electric's transportation services contract. NEXUS is a joint venture which owns a 256-mile pipeline to transport Utica and Marcellus shale gas to Ohio, Michigan, and Ontario market centers. NEXUS also owns Generation Pipeline, LLC, a 23-mile regulated pipeline system located in northern Ohio, which was acquired in September 2019. NEXUS is a VIE as it has insufficient equity at risk to finance its activities. The Registrants are not the primary beneficiaries, as the power to direct significant activities is shared between the owners of the equity interests. DTE Energy accounts for its ownership interest in NEXUS under the equity method.
The Registrants hold ownership interests in certain limited partnerships. The limited partnerships include investment funds which support regional development and economic growth, as well as, an operational business providing energy-related products. These entities are generally VIEs as a result of certain characteristics of the limited partnership voting rights. The ownership interests are accounted for under the equity method as the Registrants are not the primary beneficiaries.
DTE Energy has variable interests in VIEs through certain of its long-term purchase and sale contracts. DTE Electric has variable interests in VIEs through certain of its long-term purchase contracts, including the transportation services contract with NEXUS. As of June 30, 2020, the carrying amount of assets and liabilities in DTE Energy's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase and sale contracts are predominantly related to working capital accounts and generally represent the amounts owed by or to DTE Energy for the deliveries associated with the current billing cycle under the contracts. As of June 30, 2020, the carrying amount of assets and liabilities in DTE Electric's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase contracts are predominantly related to working capital accounts and generally represent the amounts owed by DTE Electric for the deliveries associated with the current billing cycle under the contracts. The Registrants have not provided any significant form of financial support associated with these long-term contracts. There is no material potential exposure to loss as a result of DTE Energy's variable interests through these long-term purchase and sale contracts. In addition, there is no material potential exposure to loss as a result of DTE Electric's variable interests through these long-term purchase contracts.
The maximum risk exposure for consolidated VIEs is reflected on the Registrants' Consolidated Statements of Financial Position and, for DTE Energy, in Note 13 to the Consolidated Financial Statements, "Commitments and Contingencies," related to the REF guarantees and indemnities. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, future funding commitments, and amounts which DTE Energy has guaranteed. See Note 13 to the Consolidated Financial Statements, "Commitments and Contingencies," for further discussion of the NEXUS guarantee arrangements.
The following table summarizes the major Consolidated Statements of Financial Position items for consolidated VIEs as of June 30, 2020 and December 31, 2019. All assets and liabilities of a consolidated VIE are presented where it has been determined that a consolidated VIE has either (1) assets that can be used only to settle obligations of the VIE or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary. VIEs, in which DTE Energy holds a majority voting interest and is the primary beneficiary, that meet the definition of a business and whose assets can be used for purposes other than the settlement of the VIE's obligations have been excluded from the table below.
Amounts for DTE Energy's consolidated VIEs are as follows:
June 30, 2020December 31, 2019
SGG(a)
OtherTotal
SGG(a)
OtherTotal
(In millions)
ASSETS
Cash and cash equivalents$26  $16  $42  $16  $11  $27  
Accounts receivable8  24  32  8  19  27  
Inventories—  98  98  —  74  74  
Property, plant, and equipment, net406  28  434  410  33  443  
Goodwill25  —  25  25  —  25  
Intangible assets535  —  535  542  —  542  
Other current and long-term assets—  8  8  2  —  2  
$1,000  $174  $1,174  $1,003  $137  $1,140  
LIABILITIES
Accounts payable and accrued current liabilities$—  $13  $13  $2  $13  $15  
Short term borrowings—  14  14  —  —  —  
Other current and long-term liabilities7  7  14  7  7  14  
$7  $34  $41  $9  $20  $29  
_____________________________________
(a)Amounts shown are 100% of SGG's assets and liabilities, of which DTE Energy owns 85% at June 30, 2020 and December 31, 2019.
Amounts for DTE Energy's non-consolidated VIEs are as follows:
June 30, 2020December 31, 2019
(In millions)
Investments in equity method investees$1,500  $1,503  
Notes receivable$34  $21  
Future funding commitments$32  $63  
v3.20.2
Significant Accounting Policies
 6 Months Ended
Jun. 30, 2020
Accounting Policies [Abstract]  
Significant Accounting Policies SIGNIFICANT ACCOUNTING POLICIES
Other Income
The following is a summary of DTE Energy's Other income:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Equity earnings of equity method investees$30  $20  $59  $43  
Income from REF entities29  29  52  56  
Gains from equity and fixed income securities22  7  22  24  
Allowance for equity funds used during construction7  6  13  13  
Contract services6  6  13  14  
Other7  5  7  11  
$101  $73  $166  $161  
The following is a summary of DTE Electric's Other income:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Gains from equity and fixed income securities allocated from DTE Energy$22  $7  $22  $24  
Contract services6  8  13  16  
Allowance for equity funds used during construction6  6  12  12  
Other3  4  3  6  
$37  $25  $50  $58  
Changes in Accumulated Other Comprehensive Income (Loss)
Comprehensive income (loss) is the change in common shareholders' equity during a period from transactions and events from non-owner sources, including Net Income. The amounts recorded to Accumulated other comprehensive income (loss) for DTE Energy include changes in benefit obligations, consisting of deferred actuarial losses and prior service costs, unrealized gains and losses from derivatives accounted for as cash flow hedges, and foreign currency translation adjustments. DTE Energy releases income tax effects from accumulated other comprehensive income when the circumstances upon which they are premised cease to exist.
Changes in Accumulated other comprehensive income (loss) are presented in DTE Energy's Consolidated Statements of Changes in Equity and DTE Electric's Consolidated Statements of Changes in Shareholder's Equity. For the three and six months ended June 30, 2020, reclassifications out of Accumulated other comprehensive income (loss) were not material.
On January 1, 2019, DTE Energy reclassified $25 million of stranded tax effects resulting from the TCJA from Accumulated other comprehensive income (loss) to Retained Earnings. The reclassification was recorded upon adoption of ASU No. 2018-02, Income Statement — Reporting Comprehensive Income (Topic 220): Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income. For the three and six months ended June 30, 2019, reclassifications out of Accumulated other comprehensive income (loss) not relating to the adoption of this standard were not material.
Income Taxes
The interim effective tax rates of the Registrants are as follows:
Effective Tax Rate
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
DTE Energy2 %11 %8 %11 %
DTE Electric12 %16 %12 %16 %
These tax rates are affected by estimated annual permanent items, including AFUDC equity, production tax credits, and other flow-through items, as well as discrete items that may occur in any given period, but are not consistent from period to period.
The 9% decrease in DTE Energy's effective tax rate for the three months ended June 30, 2020 was primarily due to the carryback of the 2018 net operating loss due to the CARES Act of 12% and higher amortization of the TCJA regulatory liability of 2%, partially offset by a decrease in annual production tax credits of 4%. Refer below for additional information regarding the CARES Act and related tax impacts. The 3% decrease in DTE Energy's effective tax rate for the six months ended June 30, 2020 was primarily due to the 2018 net operating loss carryback of 5% and higher amortization of the TCJA regulatory liability of 2%, partially offset by a decrease in production tax credits of 3%.
The 4% decrease in DTE Electric's effective tax rate for the three and six months ended June 30, 2020 was primarily due to higher amortization of the TCJA regulatory liability of 3% and an increase in annual production tax credits of 1%.
DTE Energy had $8 million of unrecognized tax benefits at June 30, 2020, that if recognized, would favorably impact its effective tax rate. DTE Electric had $10 million of unrecognized tax benefits at June 30, 2020, that if recognized, would favorably impact its effective tax rate. The Registrants do not anticipate any material changes in unrecognized tax benefits in the next twelve months.
DTE Electric had income tax receivables with DTE Energy of $1 million and $14 million at June 30, 2020 and December 31, 2019, respectively.
In March 2020, the "Coronavirus Aid, Relief, and Economic Security Act" (CARES Act) was signed into law and included several significant changes to the Internal Revenue Code. The CARES Act includes certain tax relief provisions applicable to the Registrants including a) the immediate refund of the corporate AMT credit, b) the ability to carryback net operating losses five years for tax years 2018 through 2020, c) the employee retention credit, and d) delayed payment of employer payroll taxes.
As of June 30, 2020, DTE Energy had a $220 million receivable recorded in anticipation of a refund from the U.S. Treasury, which is included in Accounts receivable - Other on the Consolidated Statements of Financial Position. The receivable is comprised of $153 million for the immediate refund of the 2018 remaining AMT credit balance and $67 million as a result of carrying back the 2018 net operating loss to 2013.
In addition, the carryback of the 2018 net operating loss to 2013 resulted in a $34 million reduction in Income Tax Expense for the three and six months ended June 30, 2020 due primarily to the difference in rates between the two years (35% in 2013 and 21% in 2018).
The Registrants filed a claim for employee retention credits of $6 million, of which $3 million is attributable to DTE Electric. These amounts are included in Taxes other than income in the Consolidated Statements of Operations for the three and six months ended June 30, 2020. The Registrants also deferred employer payroll taxes of $14 million, of which $8 million is attributable to DTE Electric, increasing the amount of Current Liabilities - Other on the Registrants' Consolidated Statements of Financial Position as of June 30, 2020.
Unrecognized Compensation Costs
As of June 30, 2020, DTE Energy had $99 million of total unrecognized compensation cost related to non-vested stock incentive plan arrangements. That cost is expected to be recognized over a weighted-average period of 1.66 years.
Allocated Stock-Based Compensation
DTE Electric received an allocation of costs from DTE Energy associated with stock-based compensation of $7 million and $11 million for the three months ended June 30, 2020 and 2019, respectively, while such allocation was $16 million and $24 million for the six months ended June 30, 2020 and 2019, respectively.
Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents include cash on hand, cash in banks, and temporary investments purchased with remaining maturities of three months or less. Restricted cash consists of funds held in separate bank accounts to satisfy contractual obligations to fund certain construction projects and guarantee performance. Restricted cash designated for payments within one year is classified as a Current Asset.
Financing Receivables
The Registrants monitor the credit quality of their financing receivables on a regular basis by reviewing credit quality indicators and monitoring for trigger events, such as a credit rating downgrade or bankruptcy. Credit quality indicators include, but are not limited to, ratings by credit agencies where available, collection history, collateral, counterparty financial statements and other internal metrics. Utilizing such data, the Registrants have determined three internal grades of credit quality. Internal grade 1 includes financing receivables for counterparties where credit rating agencies have ranked the counterparty as investment grade. To the extent credit ratings are not available, the Registrants utilize other credit quality indicators to determine the level of risk associated with the financing receivable. Internal grade 1 may include financing receivables for counterparties for which credit rating agencies have ranked the counterparty as below investment grade, however, due to favorable information on other credit quality indicators, the Registrants have determined the risk level to be similar to that of an investment grade counterparty. Internal grade 2 includes financing receivables for counterparties with limited credit information and those with a higher risk profile based upon credit quality indicators. Internal grade 3 reflects financing receivables for which the counterparties have the greatest level of risk, including those in bankruptcy status.
The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through June 30, 2020.
DTE EnergyDTE Electric
Year of origination
202020192018 and priorTotal2020 and prior
(In millions)
Notes receivable
Internal grade 1$2  $9  $9  $20  $11  
Internal grade 238  13  7  58  —  
Total notes receivable(a)
$40  $22  $16  $78  $11  
Net investment in leases
Net investment in leases, internal grade 1$8  $—  $42  $50  $—  
Net investment in leases, internal grade 2132  —  1  133  —  
Total net investment in leases(a)
$140  $—  $43  $183  $—  
_______________________________________
(a)For DTE Energy, included in Current Assets — Other and Other Assets — Notes Receivable on the Consolidated Statements of Financial Position. For DTE Electric, included in Current Assets — Other and Other Assets — Other on the Consolidated Statements of Financial Position.
The allowance for doubtful accounts on accounts receivable for the utility entities is generally calculated using an aging approach that utilizes rates developed in reserve studies. DTE Electric and DTE Gas establish an allowance for uncollectible accounts based on historical losses and management's assessment of existing and future economic conditions, customer trends and other factors. Customer accounts are generally considered delinquent if the amount billed is not received by the due date, which is typically in 21 days, however, factors such as assistance programs may delay aggressive action. DTE Electric and DTE Gas generally assess late payment fees on trade receivables based on past-due terms with customers. Customer accounts are written off when collection efforts have been exhausted. The time period for write-off is 150 days after service has been terminated.
The customer allowance for doubtful accounts for non-utility businesses and other receivables for both utility and non-utility businesses is generally calculated based on specific review of probable future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, customer trends and other factors are also considered. Receivables are written off on a specific identification basis and determined based upon the specific circumstances of the associated receivable.
Notes receivable, or financing receivables, for DTE Energy are primarily comprised of finance lease receivables and loans that are included in Notes Receivable and Other current assets on DTE Energy's Consolidated Statements of Financial Position. Notes receivable, or financing receivables, for DTE Electric are primarily comprised of loans.
Notes receivable are typically considered delinquent when payment is not received for periods ranging from 60 to 120 days. The Registrants cease accruing interest (nonaccrual status), consider a note receivable impaired, and establish an allowance for credit loss when it is probable that all principal and interest amounts due will not be collected in accordance with the contractual terms of the note receivable. In determining the allowance for credit losses for notes receivable, the Registrants consider the historical payment experience and other factors that are expected to have a specific impact on the counterparty's ability to pay including existing and future economic conditions.
DTE Energy has off balance sheet exposure in the form of a revolving credit facility. Refer to Note 13, "Commitments and Contingencies," for additional information. In determining the level of credit reserve needed, DTE considers the likelihood of funding in addition to the other factors noted above. A reserve may be established when it is likely that funding will occur. Cash payments received on nonaccrual status notes receivable, that do not bring the account contractually current, are first applied to the contractually owed past due interest, with any remainder applied to principal. Accrual of interest is generally resumed when the note receivable becomes contractually current.
The following table presents a roll-forward of the activity for the Registrants' financing receivables credit loss reserves as of June 30, 2020.
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2020$87  $4  $91  $46  
Current period provision 54  2  56  32  
Write-offs charged against allowance(89) (2) (91) (51) 
Recoveries of amounts previously written off29  (1) 28  17  
Ending reserve balance, June 30, 2020$81  $3  $84  $44  
The Registrants have been monitoring the impacts from the COVID-19 pandemic on our customers and various counterparties. As of June 30, 2020, the allowance for doubtful accounts has been increased by $8 million at DTE Electric and $3 million at DTE Gas to account for additional risk related to the pandemic.
In April 2020, the MPSC issued an order in response to the COVID-19 pandemic and authorized the deferral of certain uncollectible expense that is in excess of the amount used to set current rates. As a result of the order, $6 million and $2 million of uncollectible expense was deferred as Regulatory assets for DTE Electric and DTE Gas, respectively, during the second quarter of 2020. Refer to Note 6 to the Consolidated Financial Statements, "Regulatory Matters," for further information regarding the order.
For DTE Energy, uncollectible expense was $15 million and $48 million for the three and six months ended June 30, 2020, respectively, which is primarily comprised of the current period provision for allowance for doubtful accounts adjusted for regulatory deferrals. DTE Energy uncollectible expense was $24 million and $53 million for the three and six months ended June 30, 2019, respectively.
For DTE Electric, uncollectible expense was $9 million and $26 million for the three and six months ended June 30, 2020, respectively, which is primarily comprised of the current period provision adjusted for regulatory deferrals. DTE Electric uncollectible expense was $14 million and $30 million for the three and six months ended June 30, 2019, respectively.
There are no material amounts of past due financing receivables for the Registrants as of June 30, 2020.
v3.20.2
New Accounting Pronouncements
 6 Months Ended
Jun. 30, 2020
Accounting Standards Update and Change in Accounting Principle [Abstract]  
New Accounting Pronouncements NEW ACCOUNTING PRONOUNCEMENTS
Recently Adopted Pronouncements
In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as amended. The amendments in this update have replaced the previous incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasts, to develop credit loss estimates. The ASU requires entities to use the new methodology to measure impairment of financial instruments, including accounts receivable, and may result in earlier recognition of credit losses than under previous generally accepted accounting principles. Entities must apply the new guidance as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Registrants adopted the standard effective January 1, 2020. The adoption of the ASU did not have an impact on the Registrants' financial position or results of operations. Additional required disclosures have been included in Note 2 to the Consolidated Financial Statements, “Significant Accounting Policies”.
In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurements (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this update modify the disclosure requirements on fair value measurements in Topic 820. The Registrants adopted the ASU effective January 1, 2020. The Registrants have updated Note 8 to the Consolidated Financial Statements, Fair Value, to incorporate the disclosure changes required by the ASU.
In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The Registrants adopted the standard effective January 1, 2020 using the prospective approach. The adoption of the ASU did not have an impact on the Registrants’ Consolidated Financial Statements. On a prospective basis, costs within the scope of this amendment will be accounted for consistent with any underlying service contracts. Capitalized implementation costs will be reflected in Other noncurrent assets on the Consolidated Statements of Financial Position and amortization of these costs will be reflected in Operation and maintenance within the Consolidated Statements of Operations. Cash flow activity will be reflected in the Other current and noncurrent assets and liabilities line within the Operating Activities section of the Consolidated Statements of Cash Flows.
In August 2018, the FASB issued ASU No. 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments in this update modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The Registrants adopted the ASU effective January 1, 2020. The required disclosures for this ASU will be reflected in the 2020 year-end financial statements.
In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities. The amendments in this update modify the requirements for determining whether fees paid to a decision maker or service provider are variable interests and require reporting entities to consider indirect interests held through related parties under common control on a proportional basis. The Registrants adopted the ASU effective January 1, 2020. The adoption of the ASU did not have a significant impact on the Registrants’ Consolidated Financial Statements.
Recently Issued Pronouncements
In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The amendments in this update simplify the accounting for income taxes by removing certain exceptions, and clarifying certain requirements regarding franchise taxes, goodwill, consolidated tax expenses, and annual effective tax rate calculations. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2020. Early adoption is permitted. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments in this update provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The ASU is effective for the Registrants beginning March 12, 2020 through December 31, 2022. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
v3.20.2
Acquisitions
 6 Months Ended
Jun. 30, 2020
Business Combinations [Abstract]  
Acquisitions ACQUISITIONS
Power and Industrial Projects Segment Acquisition
On February 18, 2020, DTE Energy closed on the purchase of an 8 MW combined heat and power generation facility from South Jersey Industries (“SJI”) that provides electricity and hot and chilled water to a hotel and casino in Atlantic City, New Jersey. Direct transaction costs primarily related to advisory fees were immaterial and are included in Operation and maintenance in DTE Energy's Consolidated Statements of Operations. The fair value of consideration provided for the acquisition was approximately $95 million paid in cash.
The acquisition was accounted for using the acquisition method of accounting for business combinations. Accordingly, the cost was allocated to the underlying net assets based on their respective fair values as shown below:
(In millions)
Contract intangibles$17  
Property, plant, and equipment, net76  
Working capital2  
Total$95  
The intangible assets recorded pertain to existing customer contracts and were estimated by applying the income approach, based on discounted projected cash flows attributable to the existing agreements. The contract intangible assets are amortized on a straight-line basis over a period of 13 years, which is based on the number of years the assets are expected to economically contribute to the business. The pro forma financial information has not been presented for DTE Energy because the effects of the acquisition were not material to the Consolidated Statements of Operations.
Electric Segment Acquisitions
Effective September 12, 2019, DTE Sustainable Generation closed on the purchase of an 89 MW renewable energy project located in Michigan from Heritage Sustainable Energy in support of DTE Energy's renewable energy goals. Direct transaction costs primarily related to advisory fees were immaterial and were included in Operation and maintenance in DTE Energy's Consolidated Statements of Operations for the period incurred. The fair value of consideration provided for the acquisition was approximately $175 million, paid in cash.
The acquisition was accounted for using the acquisition method of accounting for business combinations. Accordingly, the cost was allocated to the underlying net assets based on their respective fair values as shown below:
(In millions)
Contract intangibles$109  
Property, plant, and equipment, net60  
Working capital6  
Total$175  
The intangible assets recorded pertain to existing customer contracts and were estimated by applying the income approach, based on discounted projected cash flows attributable to the existing agreements. The contract intangible assets are amortized on a straight-line basis with useful lives ranging from 11 years to 13 years, which is based on the remaining number of years the assets are expected to economically contribute to the business. The pro forma financial information has not been presented for DTE Energy because the effects of the acquisition were not material to the Consolidated Statements of Operations.
In conjunction with the above acquisition, DTE Sustainable Generation closed on a purchase and sale agreement with Heritage Sustainable Energy in January 2020 to acquire an additional renewable energy project for approximately $33 million paid in cash.
Gas Storage and Pipelines Segment Acquisition
On December 4, 2019, DTE Energy closed on the purchase of midstream natural gas assets in support of its strategy to continue to grow and earn competitive returns for shareholders. DTE Energy purchased 100 percent of M5 Louisiana Gathering, LLC and its wholly owned subsidiaries from Momentum Midstream and Indigo Natural Resources. The acquisition includes the Blue Union and LEAP assets which provide natural gas gathering and other midstream services to producers located primarily in Louisiana.
The fair value of the consideration provided for the entities acquired was $2.74 billion and included $2.36 billion paid in cash and an estimated $380 million of contingent consideration to be paid upon completion of the LEAP gathering pipeline in the second half of 2020. As of June 30, 2020, a liability of $384 million for the contingent consideration payment was included in the Acquisition related deferred payment line in the Consolidated Statements of Financial Position. The liability included related accretion expense of $2 million and $4 million for the three and six months ended June 30, 2020, respectively. In July 2020, the LEAP gathering pipeline achieved the final milestone of its construction and consideration of $385 million was paid on July 27, 2020 in two equal installments.
The acquisition was financed through the issuance of Equity Units, common stock, and Senior Notes. The acquired assets are part of DTE Energy's non-utility Gas Storage and Pipelines segment. The acquisition was accounted for using the acquisition method of accounting for business combinations. The allocation of the purchase price included in the Consolidated Statements of Financial Position is preliminary and may be revised up to one year from the date of acquisition due to adjustments in the estimated fair value of the assets acquired and the liabilities assumed. The purchase price is subject to (i) final working capital settlement adjustments, and (ii) resolution of any indemnification claims that might be deducted from the remaining $99 million of cash consideration paid and held in escrow.
The excess purchase price over the fair value of net assets acquired was classified as goodwill. As of June 30, 2020, total goodwill was approximately $172 million, including $1 million resulting from working capital adjustments recorded during the six months ended June 30, 2020. DTE Energy cannot estimate the potential for any further revisions to the purchase price allocation for the remainder of 2020.
The factors contributing to the recognition of goodwill are based on various strategic benefits that are expected to be realized from the Blue Union and LEAP acquisition. The acquisition will provide DTE Energy with a platform for midstream growth and access to further investment opportunities in the Haynesville basin. The goodwill is expected to be deductible for income tax purposes.
The preliminary allocation of the purchase price is based on estimated fair values of the Blue Union and LEAP assets acquired and liabilities assumed at the date of acquisition, December 4, 2019. The components of the preliminary purchase price allocation, inclusive of purchase accounting adjustments, are as follows:
(In millions)
Assets
Cash$62  
Accounts receivable31  
Property, plant, and equipment, net1,035  
Goodwill172  
Customer relationship intangibles1,473  
Other current assets1  
$2,774  
Liabilities
Accounts payable$26  
Acquisition related deferred payment380  
Other current liabilities2  
Asset retirement obligations9  
$417  
Total cash consideration$2,357  
The intangible assets recorded as a result of the acquisition pertain to existing customer relationships, which were valued at approximately $1.47 billion as of the acquisition date. The fair value of the intangible assets acquired was estimated by applying the income approach. The income approach is based upon discounted projected future cash flows attributable to the existing contracts and agreements. The fair value measurement is based on significant unobservable inputs, including management estimates and assumptions, and thus represents a Level 3 measurement, pursuant to the applicable accounting guidance. Key estimates and inputs include revenue and expense projections and discount rates based on the risks associated with the entities. The intangible assets are amortized on a straight-line basis over a period of 40 years, which is based on the number of years the assets are expected to economically contribute to the business. The expected economic benefit incorporates existing customer contracts with a weighted-average amortization life of 13 years and expected renewal rates, based on the estimated volume and production lives of gas resources in the region.
DTE Energy incurred $18 million of direct transaction costs for the year ended December 31, 2019. These costs were primarily related to advisory fees and were included in Operation and maintenance in DTE Energy's Consolidated Statements of Operations. Additionally, DTE Energy incurred $49 million of issuance costs related to the acquisition financing, of which $10 million were included in Mortgage bonds, notes, and other, and $39 million were included in Common Stock in DTE Energy's Consolidated Statements of Financial Position.
DTE Energy's 2019 Consolidated Statements of Operations included Operating Revenues — Non-utility operations of $15 million and Net Income of $3 million associated with the acquired entities for the one-month period following the acquisition date, excluding the $18 million transaction costs described above. The pro forma financial information was not presented for DTE Energy because the effects of the acquisition were not material to the Consolidated Statements of Operations.
v3.20.2
Revenue
 6 Months Ended
Jun. 30, 2020
Revenue from Contract with Customer [Abstract]  
Revenue REVENUE
Disaggregation of Revenue
The following is a summary of revenues disaggregated by segment for DTE Energy:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Electric(a)
Residential$671  $494  $1,269  $1,047  
Commercial389  423  815  843  
Industrial120  158  276  322  
Other(b)
132  115  168  213  
Total Electric operating revenues(c)
$1,312  $1,190  $2,528  $2,425  
Gas
Gas sales$169  $163  $563  $640  
End User Transportation43  42  120  122  
Intermediate Transportation16  15  42  41  
Other(b)
23  23  66  85  
Total Gas operating revenues(d)
$251  $243  $791  $888  
Other segment operating revenues
Gas Storage and Pipelines(e)
$172  $121  $342  $237  
Power and Industrial Projects(f)
$219  $402  $526  $790  
Energy Trading(g)
$740  $1,113  $1,653  $2,414  
_______________________________________
(a)Revenues generally represent those of DTE Electric, except $3 million and $7 million of Other revenues related to DTE Sustainable Generation for the three and six months ended June 30, 2020, respectively.
(b)Includes revenue adjustments related to various regulatory mechanisms.
(c)Includes $5 million of other revenues outside the scope of topic 606 for the three months ended June 30, 2020 and 2019, and $10 million and $8 million for the six months ended June 30, 2020 and 2019, respectively.
(d)Includes $2 million under Alternative Revenue Programs for the six months ended June 30, 2020 and $3 million and $5 million of other revenues for the three and six months ended June 30, 2020, respectively, which are all outside the scope of Topic 606. For prior period, revenues include $3 million under Alternative Revenue Programs for the six months ended June 30, 2019 and $2 million and $4 million of other revenues for the three and six months ended June 30, 2019, respectively, which are all outside the scope of Topic 606.
(e)Includes revenues outside the scope of Topic 606 primarily related to $2 million of contracts accounted for as leases for the three months ended June 30, 2020 and 2019, and $4 million for the six months ended June 30, 2020 and 2019.
(f)Includes revenues outside the scope of Topic 606 primarily related to $21 million and $30 million of contracts accounted for as leases for the three months ended June 30, 2020 and 2019, respectively, and $48 million and $61 million for the six months ended June 30, 2020 and 2019, respectively.
(g)Includes revenues outside the scope of Topic 606 primarily related to $467 million and $879 million of derivatives for the three months ended June 30, 2020 and 2019, respectively, and $1.1 billion and $1.8 billion of derivatives for the six months ended June 30, 2020 and 2019, respectively.
Deferred Revenue
The following is a summary of deferred revenue activity:
DTE Energy
(In millions)
Beginning Balance, January 1, 2020$75  
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period34  
Revenue recognized that was included in the deferred revenue balance at the beginning of the period(12) 
Ending Balance, June 30, 2020$97  
The deferred revenues at DTE Energy generally represent amounts paid by or receivable from customers for which the associated performance obligation has not yet been satisfied.
Deferred revenues include amounts associated with REC performance obligations under certain wholesale full requirements power contracts. Deferred revenues associated with RECs are recognized as revenue when control of the RECs has transferred.
Other performance obligations associated with deferred revenues include providing products and services related to customer prepayments. Deferred revenues associated with these products and services are recognized when control has transferred to the customer.
The following table represents deferred revenue amounts for DTE Energy that are expected to be recognized as revenue in future periods:
DTE Energy
(In millions)
2020$53  
202116  
20227  
20233  
20247  
2025 and thereafter11  
$97  
Transaction Price Allocated to the Remaining Performance Obligations
In accordance with optional exemptions available under Topic 606, the Registrants did not disclose the value of unsatisfied performance obligations for (1) contracts with an original expected length of one year or less, (2) with the exception of fixed consideration, contracts for which revenue is recognized at the amount to which the Registrants have the right to invoice for goods provided and services performed, and (3) contracts for which variable consideration relates entirely to an unsatisfied performance obligation.
Such contracts consist of varying types of performance obligations across the segments, including the supply and delivery of energy related products and services. Contracts with variable volumes and/or variable pricing, including those with pricing provisions tied to a consumer price or other index, have also been excluded as the related consideration under the contract is variable at inception of the contract. Contract lengths vary from cancellable to multi-year.
The Registrants expect to recognize revenue for the following amounts related to fixed consideration associated with remaining performance obligations in each of the future periods noted:
DTE EnergyDTE Electric
(In millions)
2020$122  $4  
2021349  8  
2022291  7  
2023228  7  
2024143  7  
2025 and thereafter578  1  
$1,711  $34  
v3.20.2
Regulatory Matters
 6 Months Ended
Jun. 30, 2020
Public Utilities, General Disclosures [Abstract]  
Regulatory Matters REGULATORY MATTERS
2020 COVID-19 Response
In response to the COVID-19 pandemic, the MPSC issued an order on April 15, 2020 to provide guidance and direction to utilities and other stakeholders on topics including customer protections and affordability, utility accounting, regulatory activities, energy assistance, and energy waste reduction and demand response continuity.  The order authorizes the deferral of uncollectible expense that is in excess of the amount used to set current rates effective March 24, 2020, the date of Michigan's executive order to "Stay Home, Stay Safe".  The Registrants implemented the deferral in the second quarter 2020. Refer to Note 2 to the Consolidated Financial Statements, "Significant Accounting Policies" for the impact to uncollectible expense for the period. On July 23, 2020, the MPSC further ordered that utilities seeking to recover COVID-19 related expenses beyond uncollectible expense may make an informational filing no later than November 2, 2020. The Registrants will evaluate this order and continue to monitor MPSC activities involving COVID-19.
2019 Electric Rate Case Filing
DTE Electric filed a rate case with the MPSC on July 8, 2019 requesting an increase in base rates of $351 million based on a projected twelve-month period ending April 30, 2021. The requested increase in base rates is primarily due to an increase in net plant resulting from infrastructure and generation investments. The rate filing also requested an increase in return on equity from 10.0% to 10.5% and included projected changes in sales and operating and maintenance expenses. On May 8, 2020, the MPSC issued an order approving an annual revenue increase of $188 million for services rendered on or after May 15, 2020 and a return on equity of 9.9%. The order also disallowed $41 million of capital expenditures related to incentive compensation previously recorded during 2018-2020, resulting in an adjustment to Asset (gains) losses and impairment, net during the second quarter.
2020 Accounting Application
On July 9, 2020 the MPSC approved DTE Electric's request to accelerate amortization of the regulatory liability for non-plant-related accumulated deferred income tax balances that resulted from the TCJA. DTE Electric will increase amortization by $102 million beginning in May 2021, which will fully amortize this regulatory liability by the end of 2021 instead of April 2033. The accelerated amortization will not impact customer rates and will allow DTE Electric to defer its next rate case filing previously set for July 2020 to at least March 1, 2021.
2019 Gas Rate Case Filing
DTE Gas filed a rate case with the MPSC on November 25, 2019 requesting an increase in base rates of $204 million based on a projected twelve-month period ending September 30, 2021.  The requested increase in base rates is primarily due to an increase in net plant resulting from infrastructure investments and operating and maintenance expenses.  The rate filing also requests an increase in return on equity from 10.0% to 10.5% and includes projected changes in sales and working capital. 
On July 17, 2020, DTE Gas reached a settlement with all intervening parties in the case and filed a settlement agreement authorizing the company to increase base rates by $110 million, reflecting a return on equity of 9.9%. The resulting rates are a net increase to customers of $51 million as an existing Infrastructure Recovery Mechanism (IRM) surcharge will be rolled into the new base rates. The settlement agreement also approved a $20 million annual increase to amortization of the regulatory liability for non-plant accumulated deferred income tax balances resulting from the TCJA. This increased amortization will cease upon DTE Gas receiving its next rate order. Pending MPSC approval of the settlement agreement, which is expected by September 2020, DTE Gas will implement the increases to rates and amortization effective October 1, 2020. In addition, the settlement agreement disallowed capitalized expenditures related to incentive compensation, consistent with the MPSC order issued for DTE Electric on May 8, 2020. In anticipation of the disallowance, DTE Gas recorded an adjustment of $14 million to Asset (gains) losses and impairment, net on the Consolidated Statements of Operations during the second quarter 2020.
v3.20.2
Earnings Per Share
 6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE
Basic earnings per share is calculated by dividing the net income, adjusted for income allocated to participating securities, by the weighted average number of common shares outstanding during the period. Diluted earnings per share reflect the dilution that would occur if any potentially dilutive instruments were exercised or converted into common shares. DTE Energy’s participating securities are restricted shares under the stock incentive program that contain rights to receive non-forfeitable dividends. Equity units and performance shares do not receive cash dividends; as such, these awards are not considered participating securities.
The following is a reconciliation of DTE Energy's basic and diluted income per share calculation:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company$277  $182  $617  $583  
Less: Allocation of earnings to net restricted stock awards—  —  1  1  
Net income available to common shareholders — basic$277  $182  $616  $582  
Average number of common shares outstanding — basic192  183  192  183  
Basic Earnings per Common Share$1.44  $0.99  $3.20  $3.19  
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company$277  $182  $617  $583  
Less: Allocation of earnings to net restricted stock awards—  —  1  1  
Net income available to common shareholders — diluted$277  $182  $616  $582  
Average number of common shares outstanding — basic192  183  192  183  
Incremental shares attributable to:
Average dilutive equity units, performance share awards, and stock options1  1  —  —  
Average number of common shares outstanding — diluted193  184  192  183  
Diluted Earnings per Common Share(a)
$1.44  $0.99  $3.20  $3.18  
_______________________________________
(a)Equity Units excluded from the calculation of diluted EPS were approximately 10.3 million for the three and six months ended June 30, 2020, as the dilutive stock price threshold was not met.
v3.20.2
Fair Value
 6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value FAIR VALUE
Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable inputs. The Registrants make certain assumptions they believe that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. Credit risk of the Registrants and their counterparties is incorporated in the valuation of assets and liabilities through the use of credit reserves, the impact of which was immaterial at June 30, 2020 and December 31, 2019. The Registrants believe they use valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs.
A fair value hierarchy has been established that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The Registrants classify fair value balances based on the fair value hierarchy defined as follows:
•Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Registrants have the ability to access as of the reporting date.
•Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.
•Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
The following table presents assets and liabilities for DTE Energy measured and recorded at fair value on a recurring basis(a):
June 30, 2020December 31, 2019
Level
1		Level
2		Level
3
Other(b)
Netting(c)
Net BalanceLevel
1		Level
2		Level
3
Other(b)
Netting(c)
Net Balance
(In millions)
Assets
Cash equivalents(d)
$331  $—  $—  $—  $—  $331  $15  $—  $—  $—  $—  $15  
Nuclear decommissioning trusts
Equity securities973  —  —  —  —  973  1,046  —  —  —  —  1,046  
Fixed income securities137  372  —  —  —  509  160  378  —  —  —  538  
Private equity and other—  —  —  62  —  62  —  —  —  43  —  43  
Cash equivalents59  —  —  —  —  59  34  —  —  —  —  34  
Other investments(e)
Equity securities42  —  —  —  —  42  140  —  —  —  —  140  
Fixed income securities6  —  —  —  —  6  79  —  —  —  —  79  
Cash equivalents177  —  —  —  —  177  4  —  —  —  —  4  
Derivative assets
Commodity contracts(f)
Natural gas100  79  71  —  (173) 77  205  76  74  —  (266) 89  
Electricity—  155  68  —  (165) 58  —  223  83  —  (225) 81  
Environmental & Other—  217  10  —  (217) 10  —  110  3  —  (110) 3  
Foreign currency exchange contracts—  3  —  —  —  3  —  1  —  —  —  1  
Total derivative assets100  454  149  —  (555) 148  205  410  160  —  (601) 174  
Total$1,825  $826  $149  $62  $(555) $2,307  $1,683  $788  $160  $43  $(601) $2,073  
Liabilities
Derivative liabilities
Commodity contracts(f)
Natural gas$(123) $(52) $(51) $—  $173  $(53) $(221) $(41) $(89) $—  $266  $(85) 
Electricity—  (159) (52) —  165  (46) —  (231) (67) —  225  (73) 
Environmental & Other(3) (199) —  —  217  15  —  (121) —  —  110  (11) 
Foreign currency exchange contracts—  (1) —  —  —  (1) —  —  —  —  —  —  
Total$(126) $(411) $(103) $—  $555  $(85) $(221) $(393) $(156) $—  $601  $(169) 
Net Assets at end of period$1,699  $415  $46  $62  $—  $2,222  $1,462  $395  $4  $43  $—  $1,904  
Assets
Current$425  $329  $108  $—  $(426) $436  $218  $320  $123  $—  $(513) $148  
Noncurrent1,400  497  41  62  (129) 1,871  1,465  468  37  43  (88) 1,925  
Total Assets$1,825  $826  $149  $62  $(555) $2,307  $1,683  $788  $160  $43  $(601) $2,073  
Liabilities
Current$(117) $(298) $(63) $—  $426  $(52) $(211) $(300) $(85) $—  $513  $(83) 
Noncurrent(9) (113) (40) —  129  (33) (10) (93) (71) —  88  (86) 
Total Liabilities$(126) $(411) $(103) $—  $555  $(85) $(221) $(393) $(156) $—  $601  $(169) 
Net Assets at end of period$1,699  $415  $46  $62  $—  $2,222  $1,462  $395  $4  $43  $—  $1,904  
_______________________________________
(a)See footnotes on following page.
_______________________________________
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)Amounts represent the impact of master netting agreements that allow DTE Energy to net gain and loss positions and cash collateral held or placed with the same counterparties.
(d)At June 30, 2020, the $331 million consisted of $330 million and $1 million of cash equivalents included in Cash and cash equivalents and Restricted cash on DTE Energy's Consolidated Statements of Financial Position, respectively. At December 31, 2019, the $15 million consisted of $4 million and $11 million of cash equivalents included in Cash and cash equivalents and Other investments on DTE Energy's Consolidated Statements of Financial Position, respectively.
(e)Excludes cash surrender value of life insurance investments.
(f)For contracts with a clearing agent, DTE Energy nets all activity across commodities. This can result in some individual commodities having a contra balance.
The following table presents assets for DTE Electric measured and recorded at fair value on a recurring basis as of:
June 30, 2020December 31, 2019
Level 1Level 2Level 3
Other(a)
Net BalanceLevel 1Level 2Level 3
Other(a)
Net Balance
(In millions)
Assets
Cash equivalents(b)
$205  $—  $—  $—  $205  $11  $—  $—  $—  $11  
Nuclear decommissioning trusts
Equity securities973  —  —  —  973  1,046  —  —  —  1,046  
Fixed income securities137  372  —  —  509  160  378  —  —  538  
Private equity and other—  —  —  62  62  —  —  —  43  43  
Cash equivalents59  —  —  —  59  34  —  —  —  34  
Other investments
Equity securities13  —  —  —  13  13  —  —  —  13  
Cash equivalents11  —  —  —  11  —  —  —  —  —  
Derivative assets — FTRs—  —  10  —  10  —  —  3  —  3  
Total$1,398  $372  $10  $62  $1,842  $1,264  $378  $3  $43  $1,688  
Assets
Current$205  $—  $10  $—  $215  $11  $—  $3  $—  $14  
Noncurrent1,193  372  —  62  1,627  1,253  378  —  43  1,674  
Total Assets$1,398  $372  $10  $62  $1,842  $1,264  $378  $3  $43  $1,688  
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
(b)At June 30, 2020, the $205 million of cash equivalents was included in Cash and cash equivalents on DTE Electric's Consolidated Statements of Financial Position. At December 31, 2019, the $11 million of cash equivalents was included in Other investments on DTE Electric's Consolidated Statements of Financial Position.
Cash Equivalents
Cash equivalents include investments with maturities of three months or less when purchased. The cash equivalents shown in the fair value table are comprised of short-term investments and money market funds.
Nuclear Decommissioning Trusts and Other Investments
The nuclear decommissioning trusts and other investments hold debt and equity securities directly and indirectly through commingled funds. Exchange-traded debt and equity securities held directly are valued using quoted market prices in actively traded markets. Commingled funds that hold exchange-traded equity or debt securities are valued based on stated NAVs. Non-exchange traded fixed income securities are valued based upon quotations available from brokers or pricing services.
Private equity and other assets include a diversified group of funds that are classified as NAV assets. These funds primarily invest in private equity partnerships, as well as real estate and private debt. Distributions are received through the liquidation of the underlying fund assets over the life of the funds. There are generally no redemption rights. The limited partner must hold the fund for its life or find a third-party buyer, which may need to be approved by the general partner. The funds are established with varied contractual durations generally in the range of 7 years to 12 years. The fund life can often be extended by several years by the general partner, and further extended with the approval of the limited partners. Unfunded commitments related to these investments totaled $195 million and $151 million as of June 30, 2020 and December 31, 2019, respectively.
For pricing the nuclear decommissioning trusts and other investments, a primary price source is identified by asset type, class, or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary source of a given security if the trustee determines that another price source is considered preferable. The Registrants have obtained an understanding of how these prices are derived, including the nature and observability of the inputs used in deriving such prices.
Derivative Assets and Liabilities
Derivative assets and liabilities are comprised of physical and financial derivative contracts, including futures, forwards, options, and swaps that are both exchange-traded and over-the-counter traded contracts. Various inputs are used to value derivatives depending on the type of contract and availability of market data. Exchange-traded derivative contracts are valued using quoted prices in active markets. The Registrants consider the following criteria in determining whether a market is considered active: frequency in which pricing information is updated, variability in pricing between sources or over time, and the availability of public information. Other derivative contracts are valued based upon a variety of inputs including commodity market prices, broker quotes, interest rates, credit ratings, default rates, market-based seasonality, and basis differential factors. The Registrants monitor the prices that are supplied by brokers and pricing services and may use a supplemental price source or change the primary price source of an index if prices become unavailable or another price source is determined to be more representative of fair value. The Registrants have obtained an understanding of how these prices are derived. Additionally, the Registrants selectively corroborate the fair value of their transactions by comparison of market-based price sources. Mathematical valuation models are used for derivatives for which external market data is not readily observable, such as contracts which extend beyond the actively traded reporting period. The Registrants have established a Risk Management Committee whose responsibilities include directly or indirectly ensuring all valuation methods are applied in accordance with predefined policies. The development and maintenance of the Registrants' forward price curves has been assigned to DTE Energy's Risk Management Department, which is separate and distinct from the trading functions within DTE Energy.
The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Energy:
Three Months Ended June 30, 2020Three Months Ended June 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of March 31$8  $15  $1  $24  $(10) $(25) $2  $(33) 
Transfers into Level 3 from Level 22  —  —  2  1  —  —  1  
Transfers from Level 3 into Level 2(5) —  —  (5) —  —  —  —  
Total gains (losses)
Included in earnings
12  33  (8) 37  (1) 41  —  40  
Recorded in Regulatory liabilities—  —  14  14  —  —  9  9  
Purchases, issuances, and settlements
Settlements3  (32) 3  (26) —  (6) (2) (8) 
Net Assets (Liabilities) as of June 30$20  $16  $10  $46  $(10) $10  $9  $9  
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019(a)
$18  $20  $(16) $22  $(1) $38  $(4) $33  
_______________________________________
(a)Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, and gas — non-utility in DTE Energy's Consolidated Statements of Operations

Six Months Ended June 30, 2020Six Months Ended June 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of December 31$(15) $16  $3  $4  $(49) $(2) $7  $(44) 
Transfers from Level 3 into Level 2(4) —  —  (4) —  —  —  —  
Total gains (losses)
Included in earnings
36  53  (8) 81  31  10  (1) 40  
Recorded in Regulatory liabilities—  —  12  12  —  —  7  7  
Purchases, issuances, and settlements
Settlements3  (53) 3  (47) 8  2  (4) 6  
Net Assets (Liabilities) as of June 30$20  $16  $10  $46  $(10) $10  $9  $9  
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019(a)
$37  $42  $(16) $63  $16  $17  $(5) $28  
_______________________________________
(a)Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, and gas — non-utility in DTE Energy's Consolidated Statements of Operations
The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Electric:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Net Assets as of beginning of period$1  $2  $3  $6  
Change in fair value recorded in Regulatory liabilities14  9  12  7  
Purchases, issuances, and settlements
Settlements(5) (2) (5) (4) 
Net Assets as of June 30$10  $9  $10  $9  
The amount of total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets held at June 30, 2020 and 2019 and reflected in DTE Electric's Consolidated Statements of Financial Position$10  $9  $10  $9  
Derivatives are transferred between levels primarily due to changes in the source data used to construct price curves as a result of changes in market liquidity. Transfers in and transfers out are reflected as if they had occurred at the beginning of the period. There were no transfers from or into Level 3 for DTE Electric during the three and six months ended June 30, 2020 and 2019.
The following tables present the unobservable inputs related to DTE Energy's Level 3 assets and liabilities:
June 30, 2020
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$71  $(51) Discounted Cash FlowForward basis price (per MMBtu)$(0.74) —$4.18 /MMBtu$(0.06)/MMBtu
Electricity$68  $(52) Discounted Cash FlowForward basis price (per MWh)$(10) —$14 /MWh$(1)/MWh
December 31, 2019
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$74  $(89) Discounted Cash FlowForward basis price (per MMBtu)$(1.78) —$5.78 /MMBtu$(0.09)/MMBtu
Electricity$83  $(67) Discounted Cash FlowForward basis price (per MWh)$(10) —$6 /MWh$— /MWh
The unobservable inputs used in the fair value measurement of the electricity and natural gas commodity types consist of inputs that are less observable due in part to lack of available broker quotes, supported by little, if any, market activity at the measurement date or are based on internally developed models. Certain basis prices (i.e., the difference in pricing between two locations) included in the valuation of natural gas and electricity contracts were deemed unobservable.
The inputs listed above would have had a direct impact on the fair values of the above security types if they were adjusted. A significant increase (decrease) in the basis price would have resulted in a higher (lower) fair value for long positions, with offsetting impacts to short positions.
Fair Value of Financial Instruments
The following table presents the carrying amount and fair value of financial instruments for DTE Energy:
June 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a), excluding lessor finance leases
$78  $—  $—  $78  $184  $—  $—  $184  
Short-term borrowings$914  $—  $914  $—  $828  $—  $828  $—  
Notes payable — Other(b)
$15  $—  $—  $15  $25  $—  $—  $25  
Long-term debt(c)
$17,997  $2,299  $15,952  $1,845  $16,606  $2,572  $14,207  $1,252  
_______________________________________
(a)Current portion included in Current Assets — Other on DTE Energy's Consolidated Statements of Financial Position.
(b)Included in Current Liabilities — Other and Other Liabilities — Other on DTE Energy's Consolidated Statements of Financial Position.
(c)Includes debt due within one year, unamortized debt discounts, and issuance costs. Excludes finance lease obligations.
The following table presents the carrying amount and fair value of financial instruments for DTE Electric:
June 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a)
$11  $—  $—  $11  $9  $—  $—  $9  
Short-term borrowings — affiliates$107  $—  $—  $107  $97  $—  $—  $97  
Short-term borrowings — other$200  $—  $200  $—  $354  $—  $354  $—  
Notes payable — Other(b)
$11  $—  $—  $11  $21  $—  $—  $21  
Long-term debt(c)
$8,566  $—  $9,821  $193  $7,180  $—  $7,916  $173  
_______________________________________
(a)Included in Current Assets — Other and Other Assets — Other on DTE Electric's Consolidated Statements of Financial Position.
(b)Included in Current Liabilities — Other and Other Liabilities — Other on DTE Electric's Consolidated Statements of Financial Position.
(c)Includes debt due within one year, unamortized debt discounts, and issuance costs. Excludes finance lease obligations.
For further fair value information on financial and derivative instruments, see Note 9 to the Consolidated Financial Statements, "Financial and Other Derivative Instruments."
Nuclear Decommissioning Trust Funds
DTE Electric has a legal obligation to decommission its nuclear power plants following the expiration of its operating licenses. This obligation is reflected as an Asset retirement obligation on DTE Electric's Consolidated Statements of Financial Position. Rates approved by the MPSC provide for the recovery of decommissioning costs of Fermi 2 and the disposal of low-level radioactive waste.
The following table summarizes DTE Electric's fair value of the nuclear decommissioning trust fund assets:
June 30, 2020December 31, 2019
(In millions)
Fermi 2$1,592  $1,650  
Fermi 13  3  
Low-level radioactive waste8  8  
$1,603  $1,661  
The costs of securities sold are determined on the basis of specific identification. The following table sets forth DTE Electric's gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Realized gains$103  $17  $134  $28  
Realized losses$(76) $(10) $(92) $(17) 
Proceeds from sale of securities$799  $220  $1,238  $396  
Realized gains and losses from the sale of securities and unrealized gains and losses incurred by the Fermi 2 trust are recorded to the Regulatory asset and Nuclear decommissioning liability. Realized gains and losses from the sale of securities and unrealized gains and losses on the low-level radioactive waste funds are recorded to the Nuclear decommissioning liability.
The following table sets forth DTE Electric's fair value and unrealized gains and losses for the nuclear decommissioning trust funds:
June 30, 2020December 31, 2019
Fair
Value		Unrealized
Gains		Unrealized
Losses		Fair
Value		Unrealized
Gains		Unrealized
Losses
(In millions)
Equity securities$973  $262  $(25) $1,046  $396  $(39) 
Fixed income securities509  35  (2) 538  24  (1) 
Private equity and other62  —  —  43  —  —  
Cash equivalents59  —  —  34  —  —  
$1,603  $297  $(27) $1,661  $420  $(40) 
The following table summarizes the fair value of the fixed income securities held in nuclear decommissioning trust funds by contractual maturity:
June 30, 2020
(In millions)
Due within one year$5  
Due after one through five years90  
Due after five through ten years114  
Due after ten years300  
$509  
Other Securities
At June 30, 2020 and December 31, 2019, the Registrants' securities included in Other investments on the Consolidated Statements of Financial Position were comprised primarily of equity and fixed income securities within DTE Energy's rabbi trust. The rabbi trust was established to fund certain non-qualified pension benefits, and therefore changes in market value are recognized in earnings. Gains and losses are allocated from DTE Energy to DTE Electric and are included in Other Income or Other Expense, respectively, in the Registrants' Consolidated Statements of Operations. The following table summarizes DTE Energy's gains (losses) related to the trust:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Gains (losses) related to equity securities$16  $4  $(6) $17  
Gains (losses) related to fixed income securities6  3  (3) 7  
$22  $7  $(9) $24  
v3.20.2
Financial and Other Derivative Instruments
 6 Months Ended
Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Financial and Other Derivative Instruments FINANCIAL AND OTHER DERIVATIVE INSTRUMENTS
The Registrants recognize all derivatives at their fair value as Derivative assets or liabilities on their respective Consolidated Statements of Financial Position unless they qualify for certain scope exceptions, including the normal purchases and normal sales exception. Further, derivatives that qualify and are designated for hedge accounting are classified as either hedges of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge); or as hedges of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge). For cash flow hedges, the derivative gain or loss is deferred in Accumulated other comprehensive income (loss) and later reclassified into earnings when the underlying transaction occurs. For fair value hedges, changes in fair values for the derivative and hedged item are recognized in earnings each period. For derivatives that do not qualify or are not designated for hedge accounting, changes in fair value are recognized in earnings each period.
The Registrants' primary market risk exposure is associated with commodity prices, credit, and interest rates. The Registrants have risk management policies to monitor and manage market risks. The Registrants use derivative instruments to manage some of the exposure. DTE Energy uses derivative instruments for trading purposes in its Energy Trading segment. Contracts classified as derivative instruments include electricity, natural gas, oil, certain environmental contracts, forwards, futures, options, swaps, and foreign currency exchange contracts. Items not classified as derivatives include natural gas and environmental inventory, pipeline transportation contracts, certain environmental contracts, and natural gas storage assets.
DTE Electric — DTE Electric generates, purchases, distributes, and sells electricity. DTE Electric uses forward contracts to manage changes in the price of electricity and fuel. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Other derivative contracts are MTM and recoverable through the PSCR mechanism when settled. This results in the deferral of unrealized gains and losses as Regulatory assets or liabilities until realized.
DTE Gas — DTE Gas purchases, stores, transports, distributes, and sells natural gas, and buys and sells transportation and storage capacity. DTE Gas has fixed-priced contracts for portions of its expected natural gas supply requirements through March 2023. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Forward transportation and storage contracts are generally not derivatives and are therefore accounted for under the accrual method.
Gas Storage and Pipelines — This segment is primarily engaged in services related to the gathering, transportation, and storage of natural gas. Primarily fixed-priced contracts are used in the marketing and management of transportation and storage services. Generally, these contracts are not derivatives and are therefore accounted for under the accrual method.
Power and Industrial Projects — This segment manages and operates energy and pulverized coal projects, a coke battery, reduced emissions fuel projects, renewable gas recovery, and power generation assets. Primarily fixed-price contracts are used in the marketing and management of the segment assets. These contracts are generally not derivatives and are therefore accounted for under the accrual method.
Energy Trading — Commodity Price Risk — Energy Trading markets and trades electricity, natural gas physical products, and energy financial instruments, and provides energy and asset management services utilizing energy commodity derivative instruments. Forwards, futures, options, and swap agreements are used to manage exposure to the risk of market price and volume fluctuations in its operations. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met.
Energy Trading — Foreign Currency Exchange Risk — Energy Trading has foreign currency exchange forward contracts to economically hedge fixed Canadian dollar commitments existing under natural gas and power purchase and sale contracts and natural gas transportation contracts. Energy Trading enters into these contracts to mitigate price volatility with respect to fluctuations of the Canadian dollar relative to the U.S. dollar. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met.
Corporate and Other — Interest Rate Risk — DTE Energy may use interest rate swaps, treasury locks, and other derivatives to hedge the risk associated with interest rate market volatility.
Credit Risk — DTE Energy maintains credit policies that significantly minimize overall credit risk. These policies include an evaluation of potential customers’ and counterparties’ financial condition, including the viability of underlying productive assets, credit rating, collateral requirements, or other credit enhancements such as letters of credit or guarantees. DTE Energy generally uses standardized agreements that allow the netting of positive and negative transactions associated with a single counterparty. DTE Energy maintains a provision for credit losses based on factors surrounding the credit risk of its customers, historical trends, and other information. Based on DTE Energy's credit policies and its June 30, 2020 provision for credit losses, DTE Energy’s exposure to counterparty nonperformance is not expected to have a material adverse effect on DTE Energy's Consolidated Financial Statements.
Derivative Activities
DTE Energy manages its MTM risk on a portfolio basis based upon the delivery period of its contracts and the individual components of the risks within each contract. Accordingly, it records and manages the energy purchase and sale obligations under its contracts in separate components based on the commodity (e.g. electricity or natural gas), the product (e.g. electricity for delivery during peak or off-peak hours), the delivery location (e.g. by region), the risk profile (e.g. forward or option), and the delivery period (e.g. by month and year). The following describes the categories of activities represented by their operating characteristics and key risks:
•Asset Optimization — Represents derivative activity associated with assets owned and contracted by DTE Energy, including forward natural gas purchases and sales, natural gas transportation, and storage capacity. Changes in the value of derivatives in this category typically economically offset changes in the value of underlying non-derivative positions, which do not qualify for fair value accounting. The difference in accounting treatment of derivatives in this category and the underlying non-derivative positions can result in significant earnings volatility.
•Marketing and Origination — Represents derivative activity transacted by originating substantially hedged positions with wholesale energy marketers, producers, end-users, utilities, retail aggregators, and alternative energy suppliers.
•Fundamentals Based Trading — Represents derivative activity transacted with the intent of taking a view, capturing market price changes, or putting capital at risk. This activity is speculative in nature as opposed to hedging an existing exposure.
•Other — Includes derivative activity at DTE Electric related to FTRs. Changes in the value of derivative contracts at DTE Electric are recorded as Derivative assets or liabilities, with an offset to Regulatory assets or liabilities as the settlement value of these contracts will be included in the PSCR mechanism when realized.
The following table presents the fair value of derivative instruments for DTE Energy:
June 30, 2020December 31, 2019
Derivative
Assets		Derivative LiabilitiesDerivative
Assets		Derivative Liabilities
(In millions)
Derivatives not designated as hedging instruments
Commodity contracts
Natural gas$250  $(226) $355  $(351) 
Electricity223  (211) 306  (298) 
Environmental & Other227  (202) 113  (121) 
Foreign currency exchange contracts3  (1) 1  —  
Total derivatives not designated as hedging instruments$703  $(640) $775  $(770) 
Current$531  $(478) $646  $(596) 
Noncurrent172  (162) 129  (174) 
Total derivatives$703  $(640) $775  $(770) 
The following table presents the fair value of derivative instruments for DTE Electric:
June 30, 2020December 31, 2019
(In millions)
FTRs — Other current assets$10  $3  
Total derivatives not designated as hedging instruments$10  $3  
Certain of DTE Energy's derivative positions are subject to netting arrangements which provide for offsetting of asset and liability positions as well as related cash collateral. Such netting arrangements generally do not have restrictions. Under such netting arrangements, DTE Energy offsets the fair value of derivative instruments with cash collateral received or paid for those contracts executed with the same counterparty, which reduces DTE Energy's Total Assets and Liabilities. Cash collateral is allocated between the fair value of derivative instruments and customer accounts receivable and payable with the same counterparty on a pro-rata basis to the extent there is exposure. Any cash collateral remaining, after the exposure is netted to zero, is reflected in Accounts receivable and Accounts payable as collateral paid or received, respectively.
DTE Energy also provides and receives collateral in the form of letters of credit which can be offset against net Derivative assets and liabilities as well as Accounts receivable and payable. DTE Energy had issued letters of credit of $6 million outstanding at June 30, 2020 and December 31, 2019 which could be used to offset net Derivative liabilities. Letters of credit received from third parties which could be used to offset net Derivative assets were $4 million at June 30, 2020 and December 31, 2019. Such balances of letters of credit are excluded from the tables below and are not netted with the recognized assets and liabilities in DTE Energy's Consolidated Statements of Financial Position.
For contracts with certain clearing agents, the fair value of derivative instruments is netted against realized positions with the net balance reflected as either 1) a Derivative asset or liability or 2) an Account receivable or payable. Other than certain clearing agents, Accounts receivable and Accounts payable that are subject to netting arrangements have not been offset against the fair value of Derivative assets and liabilities.
The following table presents net cash collateral offsetting arrangements for DTE Energy:
June 30, 2020December 31, 2019
(In millions)
Cash collateral recorded in Accounts receivable(a)
$15  $13  
Cash collateral recorded in Accounts payable(a)
(3) (3) 
Total net cash collateral posted (received)$12  $10  
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
June 30, 2020December 31, 2019
Gross Amounts of Recognized Assets (Liabilities)Gross Amounts Offset in the Consolidated Statements of Financial PositionNet Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial PositionGross Amounts of Recognized Assets (Liabilities)Gross Amounts Offset in the Consolidated Statements of Financial PositionNet Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
(In millions)
Derivative assets
Commodity contracts
Natural gas$250  $(173) $77  $355  $(266) $89  
Electricity223  (165) 58  306  (225) 81  
Environmental & Other227  (217) 10  113  (110) 3  
Foreign currency exchange contracts3  —  3  1  —  1  
Total derivative assets$703  $(555) $148  $775  $(601) $174  
Derivative liabilities
Commodity contracts
Natural gas$(226) $173  $(53) $(351) $266  $(85) 
Electricity(211) 165  (46) (298) 225  (73) 
Environmental & Other(202) 217  15  (121) 110  (11) 
Foreign currency exchange contracts(1) —  (1) —  —  —  
Total derivative liabilities$(640) $555  $(85) $(770) $601  $(169) 
The following table presents the netting offsets of Derivative assets and liabilities showing the reconciliation of derivative instruments to DTE Energy's Consolidated Statements of Financial Position:
June 30, 2020December 31, 2019
Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
CurrentNoncurrentCurrentNoncurrentCurrentNoncurrentCurrentNoncurrent
(In millions)
Total fair value of derivatives$531  $172  $(478) $(162) $646  $129  $(596) $(174) 
Counterparty netting(426) (129) 426  129  (513) (88) 513  88  
Total derivatives as reported$105  $43  $(52) $(33) $133  $41  $(83) $(86) 
The effect of derivatives not designated as hedging instruments on DTE Energy's Consolidated Statements of Operations is as follows:
Location of Gain (Loss) Recognized in Income on DerivativesGain (Loss) Recognized in Income on Derivatives for the Three Months Ended June 30,Gain (Loss) Recognized in Income on Derivatives for the Six Months Ended June 30,
2020201920202019
(In millions)
Commodity contracts
Natural gasOperating Revenues — Non-utility operations$(25) $24  $(36) $9  
Natural gasFuel, purchased power, and gas — non-utility43  (30) 79  40  
ElectricityOperating Revenues — Non-utility operations41  16  42  (33) 
Environmental & OtherOperating Revenues — Non-utility operations(63) (1) (41) —  
Foreign currency exchange contractsOperating Revenues — Non-utility operations(3) (2) 2  (3) 
Total$(7) $7  $46  $13  
Revenues and energy costs related to trading contracts are presented on a net basis in DTE Energy's Consolidated Statements of Operations. Commodity derivatives used for trading purposes, and financial non-trading commodity derivatives, are accounted for using the MTM method with unrealized and realized gains and losses recorded in Operating Revenues — Non-utility operations. Non-trading physical commodity sale and purchase derivative contracts are generally accounted for using the MTM method with unrealized and realized gains and losses for sales recorded in Operating Revenues — Non-utility operations and purchases recorded in Fuel, purchased power, and gas — non-utility.
The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of June 30, 2020:
CommodityNumber of Units
Natural gas (MMBtu)1,653,522,670  
Electricity (MWh)33,708,087  
Foreign currency exchange (CAD)181,720,213  
Renewable Energy Certificates (MWh)9,495,615  
Carbon emissions (Metric Ton)14,170,710  
Various subsidiaries of DTE Energy have entered into contracts which contain ratings triggers and are guaranteed by DTE Energy. These contracts contain provisions which allow the counterparties to require that DTE Energy post cash or letters of credit as collateral in the event that DTE Energy’s credit rating is downgraded below investment grade. Certain of these provisions (known as "hard triggers") state specific circumstances under which DTE Energy can be required to post collateral upon the occurrence of a credit downgrade, while other provisions (known as "soft triggers") are not as specific. For contracts with soft triggers, it is difficult to estimate the amount of collateral which may be requested by counterparties and/or which DTE Energy may ultimately be required to post. The amount of such collateral which could be requested fluctuates based on commodity prices (primarily natural gas, power, environmental, and coal) and the provisions and maturities of the underlying transactions. As of June 30, 2020, DTE Energy's contractual obligation to post collateral in the form of cash or letters of credit in the event of a downgrade to below investment grade, under both hard trigger and soft trigger provisions, was $368 million.
As of June 30, 2020, DTE Energy had $577 million of derivatives in net liability positions, for which hard triggers exist. There is no collateral that has been posted against such liabilities, including cash and letters of credit. Associated derivative net asset positions for which contractual offset exists were $540 million. The net remaining amount of $37 million is derived from the $368 million noted above.
v3.20.2
Long-Term Debt
 6 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Long-Term Debt LONG-TERM DEBT
Debt Issuances
In 2020, the following debt was issued:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricFebruary
Mortgage Bonds(a)
2.25%2030$600  
DTE ElectricFebruary
Mortgage Bonds(a)
2.95%2050500  
DTE ElectricApril
Mortgage Bonds(b)
2.63%2031600  
$1,700  
_______________________________________
(a)Proceeds used for the repayment of $300 million of DTE Electric's 2010 Series A 4.89% Senior Notes due 2020, repayment of short-term borrowings, capital expenditures, and for other general corporate purposes.
(b)Proceeds used for the repayment of $300 million of DTE Electric's 2010 Series B 3.45% Senior Notes due 2020, repayment of $32 million of DTE Electric's 2008 Series KT Variable Rate Senior Notes due 2020, repayment of short-term borrowings, capital expenditures, and for other general corporate purposes.
In March 2020, DTE Energy entered into a $200 million unsecured term loan with a maturity date of March 2022. The purpose of the loan is to enhance liquidity and reduce reliance on the commercial paper market. No amounts have been drawn on the loan as of June 30, 2020. The loan will terminate if no amounts have been drawn by August 27, 2020. Other terms are consistent with DTE Energy’s unsecured revolving credit agreements. Refer to Note 11 to the Consolidated Financial Statements, "Short-Term Credit Arrangements and Borrowings," for additional information regarding the credit agreements.
In May 2020, DTE Gas agreed to issue $125 million of 2.35% First Mortgage Bonds due September 1, 2030 and $125 million of 3.20% First Mortgage Bonds due September 1, 2050 to a group of institutional investors in a private placement transaction. These bonds are expected to close and fund in August 2020. Proceeds will be used for the repayment of short-term borrowings and general corporate purposes.
Debt Redemptions
In 2020, the following debt was redeemed:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricMarchSenior Notes4.89%2020$300  
On July 1, 2020, DTE Electric redeemed at maturity $32 million of DTE Electric Series 2008 KT Variable Rate Senior Notes and optionally redeemed its $300 million 2010 Series B 3.45% Senior Notes originally due October 1, 2020.
v3.20.2
Short-Term Credit Arrangements and Borrowings
 6 Months Ended
Jun. 30, 2020
Short-term Debt [Abstract]  
Short-Term Credit Arrangements and Borrowings SHORT-TERM CREDIT ARRANGEMENTS AND BORROWINGS
DTE Energy, DTE Electric, and DTE Gas have unsecured revolving credit agreements that can be used for general corporate borrowings, but are intended to provide liquidity support for each of the companies’ commercial paper programs. Borrowings under the revolvers are available at prevailing short-term interest rates. DTE Energy also has other facilities to support letter of credit issuance.
During 2020, the Registrants have entered into a series of unsecured term loans to raise additional liquidity, including terms consistent with the unsecured revolving credit agreements. In March 2020, DTE Energy entered into a $500 million unsecured term loan expiring in March 2021, of which the full $500 million has been drawn.
In April 2020, DTE Electric entered into a $200 million unsecured term loan, of which the full $200 million has been drawn, and a $200 million unsecured term loan, of which no amount has been drawn. Additionally, in April 2020, DTE Gas entered into a $100 million unsecured term loan, of which the full $100 million has been drawn. All three loans expire in April 2021.
In May 2020, DTE Lake Erie Generation, Inc., an indirect wholly-owned subsidiary of DTE Energy, entered into a C$110 million unsecured revolving credit agreement to fund construction of on-site electric generation and related infrastructure projects at a Canadian integrated steel manufacturing facility in Ontario, Canada. The revolving credit agreement is guaranteed by DTE Energy and there was C$19 million outstanding as of June 30, 2020. The revolving credit agreement expires in May 2023 and has terms consistent with DTE Energy's unsecured revolving credit agreements.
In June 2020, DTE Energy entered into a $167 million unsecured term loan expiring in June 2021, of which no amount has been drawn. The loan will terminate if no amounts have been drawn by September 28, 2020.
The unsecured revolving credit agreements require DTE Energy, DTE Electric, and DTE Gas to maintain a total funded debt to capitalization ratio of no more than 0.65 to 1. In the agreements, "total funded debt" means all indebtedness of each respective company and their consolidated subsidiaries, including finance lease obligations, hedge agreements, and guarantees of third parties’ debt, but excluding contingent obligations, nonrecourse and junior subordinated debt, and certain equity-linked securities and, except for calculations at the end of the second quarter, certain DTE Gas short-term debt. "Capitalization" means the sum of (a) total funded debt plus (b) "consolidated net worth," which is equal to consolidated total equity of each respective company and their consolidated subsidiaries (excluding pension effects under certain FASB statements), as determined in accordance with accounting principles generally accepted in the United States of America. At June 30, 2020, the total funded debt to total capitalization ratios for DTE Energy, DTE Electric, and DTE Gas were 0.60 to 1, 0.55 to 1, and 0.47 to 1, respectively, and were in compliance with this financial covenant.
The availability under these facilities as of June 30, 2020 is shown in the following table:
DTE EnergyDTE ElectricDTE GasTotal
(In millions)
Unsecured letter of credit facility, expiring in February 2021$150  $—  $—  $150  
Unsecured letter of credit facility, expiring in August 2021110  —  —  110  
Unsecured term loan, expiring in March 2021500  —  —  500  
Unsecured term loans, expiring in April 2021—  400  100  500  
Unsecured term loan, expiring in June 2021167  —  —  167  
Unsecured Canadian revolving credit facility, expiring May 202381  —  —  81  
Unsecured revolving credit facility, expiring April 20241,500  500  300  2,300  
2,508  900  400  3,808  
Amounts outstanding at June 30, 2020
Letters of credit201  —  —  201  
Unsecured term loan500  200  100  800  
Revolver borrowings114  —  —  114  
815  200  100  1,115  
Net availability at June 30, 2020$1,693  $700  $300  $2,693  
DTE Energy has $9 million of other outstanding letters of credit which are used for various corporate purposes and are not included in the facilities described above.
In July 2020, DTE Energy entered into a $50 million uncommitted letter of credit facility, of which no amount is outstanding. The facility expires in July 2021 with an automatic renewal provision.
In conjunction with maintaining certain exchange traded risk management positions, DTE Energy may be required to post collateral with its clearing agent. DTE Energy has a demand financing agreement for up to $100 million with its clearing agent. The agreement, as amended, also allows for up to $50 million of additional margin financing provided that DTE Energy posts a letter of credit for the incremental amount and allows the right of setoff with posted collateral. At June 30, 2020, the capacity under this facility was $150 million. The amount outstanding under this agreement was $70 million and $114 million at June 30, 2020 and December 31, 2019, respectively, and was fully offset by the posted collateral.
v3.20.2
Leases
 6 Months Ended
Jun. 30, 2020
Leases [Abstract]  
Leases LEASES
Lessor
During the second quarter of 2020, DTE Energy executed a sale of membership interests in the REF business accounted for as a finance lease arrangement with a term of less than 2 years, resulting in a net investment in finances leases of $8 million and selling profit of $11 million.
During the first quarter of 2020, DTE Energy completed construction of and began operating certain energy infrastructure assets for a large industrial customer under a long-term agreement, where the assets will transfer to the customer at the end of the contract term in 2040. DTE Energy has accounted for a portion of the agreement as a finance lease arrangement, recognizing a net investment of $133 million.
The components of DTE Energy’s net investment in finance leases for remaining periods were as follows:
DTE Energy
June 30, 2020
(In millions)
2020$14  
202124  
202220  
202319  
202419  
2025 and Thereafter273  
Total minimum future lease receipts369  
Residual value of leased pipeline19  
Less unearned income205  
Net investment in finance lease183  
Less current portion11  
$172  
Interest income recognized under finance leases was $4 million and $1 million for the three months ended June 30, 2020 and 2019, respectively, and $8 million and $2 million for the six months ended June 30, 2020 and 2019, respectively.
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Fixed payments$17  $17  $33  $34  
Variable payments16  25  39  52  
$33  $42  $72  $86  
Leases LEASES
Lessor
During the second quarter of 2020, DTE Energy executed a sale of membership interests in the REF business accounted for as a finance lease arrangement with a term of less than 2 years, resulting in a net investment in finances leases of $8 million and selling profit of $11 million.
During the first quarter of 2020, DTE Energy completed construction of and began operating certain energy infrastructure assets for a large industrial customer under a long-term agreement, where the assets will transfer to the customer at the end of the contract term in 2040. DTE Energy has accounted for a portion of the agreement as a finance lease arrangement, recognizing a net investment of $133 million.
The components of DTE Energy’s net investment in finance leases for remaining periods were as follows:
DTE Energy
June 30, 2020
(In millions)
2020$14  
202124  
202220  
202319  
202419  
2025 and Thereafter273  
Total minimum future lease receipts369  
Residual value of leased pipeline19  
Less unearned income205  
Net investment in finance lease183  
Less current portion11  
$172  
Interest income recognized under finance leases was $4 million and $1 million for the three months ended June 30, 2020 and 2019, respectively, and $8 million and $2 million for the six months ended June 30, 2020 and 2019, respectively.
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Fixed payments$17  $17  $33  $34  
Variable payments16  25  39  52  
$33  $42  $72  $86  
Leases LEASES
Lessor
During the second quarter of 2020, DTE Energy executed a sale of membership interests in the REF business accounted for as a finance lease arrangement with a term of less than 2 years, resulting in a net investment in finances leases of $8 million and selling profit of $11 million.
During the first quarter of 2020, DTE Energy completed construction of and began operating certain energy infrastructure assets for a large industrial customer under a long-term agreement, where the assets will transfer to the customer at the end of the contract term in 2040. DTE Energy has accounted for a portion of the agreement as a finance lease arrangement, recognizing a net investment of $133 million.
The components of DTE Energy’s net investment in finance leases for remaining periods were as follows:
DTE Energy
June 30, 2020
(In millions)
2020$14  
202124  
202220  
202319  
202419  
2025 and Thereafter273  
Total minimum future lease receipts369  
Residual value of leased pipeline19  
Less unearned income205  
Net investment in finance lease183  
Less current portion11  
$172  
Interest income recognized under finance leases was $4 million and $1 million for the three months ended June 30, 2020 and 2019, respectively, and $8 million and $2 million for the six months ended June 30, 2020 and 2019, respectively.
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Fixed payments$17  $17  $33  $34  
Variable payments16  25  39  52  
$33  $42  $72  $86  
v3.20.2
Commitments and Contingencies
 6 Months Ended
Jun. 30, 2020
Commitments and Contingencies Disclosure [Abstract]  
Commitments and Contingencies COMMITMENTS AND CONTINGENCIES
Environmental
DTE Electric
Air — DTE Electric is subject to the EPA ozone and fine particulate transport and acid rain regulations that limit power plant emissions of SO2 and NOX. The EPA and the State of Michigan have also issued emission reduction regulations relating to ozone, fine particulate, regional haze, mercury, and other air pollution. These rules have led to controls on fossil-fueled power plants to reduce SO2, NOX, mercury, and other emissions. Additional rulemakings may occur over the next few years which could require additional controls for SO2, NOX, and other hazardous air pollutants.
The EPA proposed revised air quality standards for ground level ozone in November 2014 and specifically requested comments on the form and level of the ozone standards. The standards were finalized in October 2015. The State of Michigan recommended to the EPA in October 2016 which areas of the state are not attaining the new standard. On April 30, 2018, the EPA finalized the State of Michigan's recommended marginal non-attainment designation for southeast Michigan. The State is required to develop and implement a plan to address the southeast Michigan ozone non-attainment area by 2021. The Registrants cannot predict the scope and associated financial impact of the State's plan to address the ozone non-attainment area at this time.
In July 2009, the Registrants received a NOV/FOV from the EPA alleging, among other things, that five DTE Electric power plants violated New Source Performance standards, Prevention of Significant Deterioration requirements, and operating permit requirements under the Clean Air Act. In June 2010, the EPA issued a NOV/FOV making similar allegations related to a project and outage at Unit 2 of the Monroe Power Plant. In March 2013, DTE Energy received a supplemental NOV from the EPA relating to the July 2009 NOV/FOV. The supplemental NOV alleged additional violations relating to the New Source Review provisions under the Clean Air Act, among other things.
In August 2010, the U.S. Department of Justice, at the request of the EPA, brought a civil suit in the U.S. District Court for the Eastern District of Michigan against DTE Energy and DTE Electric, related to the June 2010 NOV/FOV and the outage work performed at Unit 2 of the Monroe Power Plant. In August 2011, the U.S. District Court judge granted DTE Energy's motion for summary judgment in the civil case, dismissing the case and entering judgment in favor of DTE Energy and DTE Electric. In October 2011, the EPA filed a Notice of Appeal to the Court of Appeals for the Sixth Circuit. In March 2013, the Court of Appeals remanded the case to the U.S. District Court for review of the procedural component of the New Source Review notification requirements. In September 2013, the EPA filed a motion seeking leave to amend their complaint regarding the June 2010 NOV/FOV adding additional claims related to outage work performed at the Trenton Channel and Belle River Power Plants as well as additional claims related to work performed at the Monroe Power Plant. In March 2014, the U.S. District Court judge again granted DTE Energy's motion for summary judgment dismissing the civil case related to Monroe Unit 2. In April 2014, the U.S. District Court judge granted motions filed by the EPA and the Sierra Club to amend their New Source Review complaint adding additional claims for Monroe Units 1, 2, and 3, Belle River Units 1 and 2, and Trenton Channel Unit 9. In October 2014, the EPA and the U.S. Department of Justice filed a notice of appeal of the U.S. District Court judge's dismissal of the Monroe Unit 2 case. The amended New Source Review claims were all stayed pending resolution of the appeal by the Court of Appeals for the Sixth Circuit. On January 10, 2017, a divided panel of the Court reversed the decision of the U.S. District Court. On May 8, 2017, DTE Energy and DTE Electric filed a motion to stay the mandate pending filing of a petition for writ of certiorari with the U.S. Supreme Court. The Sixth Circuit granted the motion on May 16, 2017, staying the claims in the U.S. District Court until the U.S. Supreme Court disposes of the case. DTE Electric and DTE Energy filed a petition for writ of certiorari on July 31, 2017. On December 11, 2017, the U.S. Supreme Court denied certiorari. As a result of the Supreme Court electing not to review the matter, the case was sent back to the U.S. District Court for further proceedings and on June 14, 2018 the case was stayed pending settlement negotiations.
In May 2020, the Registrants, the United States, and the Sierra Club reached a settlement, which was memorialized in the form of a Consent Decree and a separate settlement agreement between the Registrants and Sierra Club. The Consent Decree was submitted and received by the US District Court and the public comment period ended on June 14, 2020. The United States is currently responding to the comments that were submitted during the public comment period. As of June 30, 2020, approximately $7 million has been accrued for the settlement. A final determination regarding the settlement is expected in the third quarter of 2020. The Registrants do not expect the final settlement to have a material financial impact.
The Registrants believe that the plants and generating units identified by the EPA and the Sierra Club have complied with all applicable federal environmental regulations. Depending upon the outcome of the litigation and further discussions with the EPA regarding the two NOVs/FOVs, DTE Electric could be required to install additional pollution control equipment at some or all of the power plants in question, implement early retirement of facilities where control equipment is not economical, engage in supplemental environmental programs, and/or pay fines. The Registrants do not expect the outcome of this matter to have a material impact on their Consolidated Financial Statements.
The EPA has implemented regulatory actions under the Clean Air Act to address emissions of GHGs from the utility sector and other sectors of the economy. Among these actions, in 2015 the EPA finalized performance standards for emissions of carbon dioxide from new and existing fossil-fuel fired EGUs. The performance standards for existing EGUs, known as the EPA Clean Power Plan, were challenged by petitioners and stayed by the U.S. Supreme Court in February 2016 pending final review by the courts. On October 10, 2017, the EPA, under a new administration, proposed to rescind the Clean Power Plan, and in August 2018, the EPA proposed revised emission guidelines for GHGs from existing EGUs. On June 19, 2019, the EPA Administrator officially repealed the Clean Power Plan and finalized its replacement, named the ACE rule. The ACE Rule requires the state of Michigan to submit a plan in 2022 that includes GHG standards for existing coal-fired power plant units in Michigan. These final rules do not impact DTE Energy's commitments for its electric utility operations to reduce carbon emissions 32% by the early 2020s, 50% by 2030, and 80% by 2040 from the 2005 carbon emissions levels, or its goal of net zero emissions for its electric utility operations by 2050.
In addition to the GHG standards for existing EGUs, in December 2018, the EPA issued proposed revisions to the carbon dioxide performance standards for new, modified, or reconstructed fossil-fuel fired EGUs. The carbon standards for new sources are not expected to have a material impact on DTE Electric, since DTE Electric has no plans to build new coal-fired generation and any potential new gas generation will be able to comply with the standards.
Pending or future legislation or other regulatory actions could have a material impact on DTE Electric's operations and financial position and the rates charged to its customers. Impacts include expenditures for environmental equipment beyond what is currently planned, financing costs related to additional capital expenditures, the purchase of emission credits from market sources, higher costs of purchased power, and the retirement of facilities where control equipment is not economical. DTE Electric would seek to recover these incremental costs through increased rates charged to its utility customers, as authorized by the MPSC.
To comply with air pollution requirements, DTE Electric spent approximately $2.4 billion through 2019. DTE Electric does not anticipate additional capital expenditures for air pollution requirements through 2026, subject to the results of future rulemakings.
Water — In response to an EPA regulation, DTE Electric was required to examine alternatives for reducing the environmental impacts of the cooling water intake structures at several of its facilities. Based on the results of completed studies and expected future studies, DTE Electric may be required to install technologies to reduce the impacts of the water intake structures. A final rule became effective in October 2014. The final rule requires studies to be completed and submitted as part of the NPDES permit application process to determine the type of technology needed to reduce impacts to fish. DTE Electric has initiated the process of completing the required studies. Final compliance for the installation of any required technology will be determined by the state on a case by case, site specific basis. DTE Electric is currently evaluating the compliance options and working with the State of Michigan on evaluating whether any controls are needed. These evaluations/studies may require modifications to some existing intake structures. It is not possible to quantify the impact of this rulemaking at this time.
Contaminated and Other Sites — Prior to the construction of major interstate natural gas pipelines, gas for heating and other uses was manufactured locally from processes involving coal, coke, or oil. The facilities, which produced gas, have been designated as MGP sites. DTE Electric conducted remedial investigations at contaminated sites, including three former MGP sites. The investigations have revealed contamination related to the by-products of gas manufacturing at each MGP site. In addition to the MGP sites, DTE Electric is also in the process of cleaning up other contaminated sites, including the area surrounding an ash landfill, electrical distribution substations, electric generating power plants, and underground and above ground storage tank locations. The findings of these investigations indicated that the estimated cost to remediate these sites is expected to be incurred over the next several years. At June 30, 2020 and December 31, 2019, DTE Electric had $7 million and $8 million, respectively, accrued for remediation. Any change in assumptions, such as remediation techniques, nature and extent of contamination, and regulatory requirements, could impact the estimate of remedial action costs for the sites and affect DTE Electric’s financial position and cash flows. DTE Electric believes the likelihood of a material change to the accrued amount is remote based on current knowledge of the conditions at each site.
Coal Combustion Residuals and Effluent Limitations Guidelines — A final EPA rule for the disposal of coal combustion residuals, commonly known as coal ash, became effective in October 2015, and was revised in October 2016 and July 2018. The rule is based on the continued listing of coal ash as a non-hazardous waste and relies on various self-implementation design and performance standards. DTE Electric owns and operates three permitted engineered coal ash storage facilities to dispose of coal ash from coal-fired power plants and operates a number of smaller impoundments at its power plants subject to certain provisions in the CCR rule. At certain facilities, the rule currently requires the installation of monitoring wells, compliance with groundwater standards, and the closure of basins at the end of the useful life of the associated power plant. At other facilities, the rule requires ash laden waters be moved from earthen basins to steel and concrete tanks. DTE Electric has estimated the impact of the current rule to be $609 million of capital expenditures.
On December 2, 2019, a proposed revision to the CCR Rule was published in the Federal Register to address the D.C. Circuit's 2018 decision regarding CCR impoundments that are not lined with an engineered liner system. The rule proposes that all CCR impoundments that do not meet the engineered liner requirements must close by specific dates, and it further confirms that all clay lined impoundments are viewed as unlined. On March 3, 2020, an additional proposed revision to the CCR Rule was published in the Federal Register that provides a process to determine if certain unlined impoundments consist of an alternative liner system that may be as protective as the current liners specified in the CCR rule, and therefore may continue to operate. DTE Electric is currently evaluating options including the alternative liner system demonstration for our clay lined impoundments based on the range of outcomes of the current proposed rules to determine any changes to DTE Electric's plans in the operation and closure of coal ash impoundments.
At the State level, legislation was signed by the Governor in December 2018 and provides for further regulation of the CCR program in Michigan. Additionally, the bill provides the basis of a CCR program that EGLE has submitted to the EPA for approval to fully regulate the CCR program in Michigan in lieu of a Federal permit program.
In November 2015, the EPA finalized the ELG Rule for the steam electric power generating industry which requires additional controls to be installed between 2018 and 2023. Compliance schedules for individual facilities and individual waste streams are determined through issuance of new NPDES permits by the State of Michigan. The State of Michigan has issued a NPDES permit for the Belle River Power Plant establishing a compliance deadline of December 31, 2021. No new permits that would require ELG compliance have been issued for other facilities, consequently no compliance timelines have been established.
On April 12, 2017, the EPA granted a petition for reconsideration of the 2015 ELG Rule. The EPA also signed an administrative stay of the ELG Rule’s compliance deadlines for fly ash transport water, bottom ash transport water, and FGD wastewater, among others. On June 6, 2017, the EPA published in the Federal Register a proposed rule (Postponement Rule) to postpone certain applicable deadlines within the 2015 ELG rule. The Postponement Rule was published on September 18, 2017. The Postponement Rule nullified the administrative stay but also extended the earliest compliance deadlines for only FGD wastewater and bottom ash transport water until November 1, 2020 in order for the EPA to propose and finalize a new ruling. On November 22, 2019, the EPA issued a proposed rule to revise the technology-based effluent limitations guidelines and standards applicable to FGD wastewater and bottom ash transport water. The ELG compliance requirements and final deadlines for bottom ash transport water and FGD wastewater, and total ELG related compliance costs will not be known until the EPA completes its reconsideration of the ELG Rule expected by the end of 2020.
DTE Gas
Air — In June 2020, DTE Energy expanded its net zero goal to include its gas utility operations by committing to reduce greenhouse gas emissions to net zero by 2050 from procurement of natural gas through delivery. In addition, DTE Gas committed to partner with customers to help them reduce GHG emissions through energy efficiency and participation in a voluntary emissions offset program. Further details of the DTE Gas net zero goal will emerge as the company evaluates strategies and technologies for reducing emissions.
Contaminated and Other Sites — DTE Gas owns or previously owned, 14 former MGP sites. Investigations have revealed contamination related to the by-products of gas manufacturing at each site. Cleanup of eight of the MGP sites is complete, and the sites are closed. DTE Gas has also completed partial closure of four additional sites. Cleanup activities associated with the remaining sites will continue over the next several years. The MPSC has established a cost deferral and rate recovery mechanism for investigation and remediation costs incurred at former MGP sites. In addition to the MGP sites, DTE Gas is also in the process of cleaning up other contaminated sites, including gate stations, gas pipeline releases, and underground storage tank locations. As of June 30, 2020 and December 31, 2019, DTE Gas had $24 million and $25 million, respectively, accrued for remediation. Any change in assumptions, such as remediation techniques, nature and extent of contamination, and regulatory requirements, could impact the estimate of remedial action costs for the sites and affect DTE Gas' financial position and cash flows. DTE Gas anticipates the cost amortization methodology approved by the MPSC, which allows for amortization of the MGP costs over a ten-year period beginning with the year subsequent to the year the MGP costs were incurred, will prevent the associated investigation and remediation costs from having a material adverse impact on DTE Gas' results of operations.
Non-utility
DTE Energy's non-utility businesses are subject to a number of environmental laws and regulations dealing with the protection of the environment from various pollutants.
In March 2019, the EPA issued a finding of violation to EES Coke, the Michigan coke battery facility that is a wholly-owned subsidiary of DTE Energy, alleging that the 2008 and 2014 permits issued by EGLE did not comply with the Clean Air Act. EES Coke evaluated the EPA's alleged violations and believes that the permits approved by EGLE complied with the Clean Air Act. Discussions with the EPA are ongoing. At the present time, DTE Energy cannot predict the outcome or financial impact of this FOV.
Other
In 2010, the EPA finalized a new one-hour SO2 ambient air quality standard that requires states to submit plans and associated timelines for non-attainment areas that demonstrate attainment with the new SO2 standard in phases. Phase 1 addresses non-attainment areas designated based on ambient monitoring data. Phase 2 addresses non-attainment areas with large sources of SO2 and modeled concentrations exceeding the National Ambient Air Quality Standards for SO2. Phase 3 addresses smaller sources of SO2 with modeled or monitored exceedances of the new SO2 standard.
Michigan's Phase 1 non-attainment area includes DTE Energy facilities in southwest Detroit and areas of Wayne County. Modeling runs by EGLE suggest that emission reductions may be required by significant sources of SO2 emissions in these areas, including DTE Electric power plants and DTE Energy's Michigan coke battery facility. As part of the SIP process, DTE Energy has worked with EGLE to develop air permits reflecting significant SO2 emission reductions that, in combination with other non-DTE Energy sources' emission reduction strategies, will help the state attain the standard and sustain its attainment. Since several non-DTE Energy sources are also part of the proposed compliance plan, DTE Energy is unable to determine the full impact of the final required emissions reductions on DTE's facilities at this time.
Michigan's Phase 2 non-attainment area includes DTE Electric facilities in St. Clair County. SIP submittal and EPA approval describing the control strategy and timeline for demonstrating compliance with the new SO2 standard is the next step in the process and is expected to be completed in 2020. DTE Energy is unable to determine the full impact of the SIP strategy.
Synthetic Fuel Guarantees
DTE Energy discontinued the operations of its synthetic fuel production facilities throughout the United States as of December 31, 2007. DTE Energy provided certain guarantees and indemnities in conjunction with the sales of interests in its synfuel facilities. The guarantees cover potential commercial, environmental, oil price, and tax-related obligations that will survive until 90 days after expiration of all applicable statutes of limitations. DTE Energy estimates that its maximum potential liability under these guarantees at June 30, 2020 was approximately $400 million. Payment under these guarantees are considered remote.
REF Guarantees
DTE Energy has provided certain guarantees and indemnities in conjunction with the sales of interests in or lease of its REF facilities. The guarantees cover potential commercial, environmental, and tax-related obligations that will survive until 90 days after expiration of all applicable statutes of limitations. DTE Energy estimates that its maximum potential liability under these guarantees at June 30, 2020 was $470 million. Payments under these guarantees are considered remote.
NEXUS Guarantees
NEXUS is party to certain 15-year capacity agreements for the transportation of natural gas with DTE Gas and Texas Eastern Transmission, LP, an unrelated third party. In conjunction with these agreements, DTE Energy provided certain guarantees on behalf of NEXUS to DTE Gas and Texas Eastern Transmission, LP, with maximum potential payments totaling $226 million and $360 million at June 30, 2020, respectively; each representing 50% of all payment obligations due and payable by NEXUS. Each guarantee terminates at the earlier of (i) such time as all of the guaranteed obligations have been fully performed, or (ii) two months following the end of the primary term of the capacity agreements in 2033. The amount of each guarantee decreases annually as payments are made by NEXUS to each of the aforementioned counterparties.
NEXUS is also party to certain 15-year capacity agreements for the transportation of natural gas with Vector, an equity method investee of DTE Energy. Pursuant to the terms of those agreements, in October 2018, DTE Energy executed a guarantee agreement with Vector, with a maximum potential payment totaling $7 million at June 30, 2020, representing 50% of the first-year payment obligations due and payable by NEXUS. The guarantee terminates at the earlier of (i) such time as all of the guaranteed obligations have been fully performed or (ii) 15 years from the date DTE Energy entered into the guarantee.
Should NEXUS fail to perform under the terms of these agreements, DTE Energy is required to perform on its behalf. Payments under these guarantees are considered remote.
Other Guarantees
In certain limited circumstances, the Registrants enter into contractual guarantees. The Registrants may guarantee another entity’s obligation in the event it fails to perform and may provide guarantees in certain indemnification agreements. Finally, the Registrants may provide indirect guarantees for the indebtedness of others. DTE Energy’s guarantees are not individually material with maximum potential payments totaling $51 million at June 30, 2020. Payments under these guarantees are considered remote.
The Registrants are periodically required to obtain performance surety bonds in support of obligations to various governmental entities and other companies in connection with its operations. As of June 30, 2020, DTE Energy had $123 million of performance bonds outstanding, including $68 million for DTE Electric. In the event that such bonds are called for nonperformance, the Registrants would be obligated to reimburse the issuer of the performance bond. The Registrants are released from the performance bonds as the contractual performance is completed and does not believe that a material amount of any currently outstanding performance bonds will be called.
Vector Line of Credit
In July 2019, DTE Energy, as lender, entered into a revolving term credit facility with Vector, as borrower, in the amount of C$70 million. The credit facility was executed in response to the passage of Canadian regulations requiring oil and gas pipelines to demonstrate their financial ability to respond to a catastrophic event and exists for the sole purpose of satisfying these regulations. Vector may only draw upon the facility if the funds are required to respond to a catastrophic event. The maximum potential payments under the line of credit at June 30, 2020 is $51 million. The funding of a loan under the terms of the credit facility is considered remote.
Labor Contracts
There are several bargaining units for DTE Energy subsidiaries' approximate 5,200 represented employees, including DTE Electric's approximate 2,800 represented employees. The majority of the represented employees are under contracts that expire in 2021 and 2022.
Purchase Commitments
Utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees will be approximately $4.5 billion and $2.6 billion in 2020 for DTE Energy and DTE Electric, respectively. The Registrants have made certain commitments in connection with the estimated 2020 annual capital expenditures and contributions to equity method investees.
Bankruptcies
DTE Energy's Power and Industrial Projects segment holds ownership interests in, and operates, five generating plants that sell electric output from renewable sources under long-term power purchase agreements with PG&E. PG&E filed for Chapter 11 bankruptcy protection on January 29, 2019. PG&E emerged from Chapter 11 bankruptcy effective July 1, 2020. DTE's renewable power purchase agreements were assumed under PG&E's Reorganization Plan and payment has been received for all past due receivables related to these agreements.
COVID-19 Pandemic
DTE Energy is actively monitoring the impact of the COVID-19 pandemic on supply chains, markets, counterparties, and customers, and any related impacts on operating costs, customer demand, and recoverability of assets that could materially impact the Registrants' financial results.
The uncertainty around COVID-19 and its impact has contributed to volatility in financial markets, generally including significant losses in the first quarter 2020 and gains in the second quarter 2020. For certain non-qualified benefit plan trusts for which gains and losses affect earnings, the impacts to financial markets resulted in pre-tax investment losses of $9 million for DTE Electric and $1 million for DTE Gas for the six months ended June 30, 2020. For the three months ended June 30, 2020, DTE Electric and DTE Gas recognized pre-tax investment gains of $22 million and $2 million, respectively.
Additional impacts from the COVID-19 pandemic for the three and six months ended June 30, 2020 include a reduction in DTE Electric sales volumes from commercial and industrial customers and an increase in residential customer sales volumes given closures and change to remote operations for many businesses and other institutions. This shift contributed to a net
reduction in DTE Electric sales volumes for the three and six months ended June 30, 2020, but the impact to earnings has been largely mitigated by favorable rate mix.
Operation and maintenance expenses has also been impacted by COVID-19, primarily at DTE Electric, due to higher costs for personal protective equipment and other health and safety related costs, including shift premiums and related expenses associated with the sequestration of certain employees critical to continued operations.
For non-utility businesses, COVID-19 has primarily impacted the Power and Industrial Projects segment, contributing to lower production in the REF business and lower demand in the Steel business. These impacts were most significant in March and April 2020 when government orders to cease non-essential business activity resulted in temporary shut-down of certain operations. While these impacts have adversely affected Operating revenues and Other income from REF entities, Net income has not been significantly impacted due to related decreases in Operating expenses.
Finally, as discussed in Note 2, "Significant Accounting Policies", the allowance for doubtful accounts was increased at our utilities due to additional risk relating to COVID-19. However, as a portion of this increase has been deferred as Regulatory assets, there has not been a material impact to uncollectible expense.
In consideration of the above factors and all other current and expected impacts to the Registrants' performance and cash flows resulting from the COVID-19 pandemic, there have been no material adjustments or reserves deemed necessary to the Consolidated Financial Statements as of June 30, 2020.
The Registrants cannot predict the future impacts of the COVID-19 pandemic on the Consolidated Financial Statements, as developments involving COVID-19 and its related effects on economic and operating conditions remain highly uncertain.
Other Contingencies
The Registrants are involved in certain other legal, regulatory, administrative, and environmental proceedings before various courts, arbitration panels, and governmental agencies concerning claims arising in the ordinary course of business. These proceedings include certain contract disputes, additional environmental reviews and investigations, audits, inquiries from various regulators, and pending judicial matters. The Registrants cannot predict the final disposition of such proceedings. The Registrants regularly review legal matters and record provisions for claims that they can estimate and are considered probable of loss. The resolution of these pending proceedings is not expected to have a material effect on the Registrants' Consolidated Financial Statements in the periods they are resolved.
For a discussion of contingencies related to regulatory matters and derivatives, see Notes 6 and 9 to the Consolidated Financial Statements, "Regulatory Matters" and "Financial and Other Derivative Instruments," respectively.
v3.20.2
Retirement Benefits and Trusteed Assets
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Retirement Benefits and Trusteed Assets RETIREMENT BENEFITS AND TRUSTEED ASSETS
The following tables detail the components of net periodic benefit costs (credits) for pension benefits and other postretirement benefits for DTE Energy:
Pension BenefitsOther Postretirement Benefits
Three Months Ended June 30,
2020201920202019
(In millions)
Service cost$24  $21  $7  $6  
Interest cost47  54  14  17  
Expected return on plan assets(83) (81) (32) (31) 
Amortization of:
Net actuarial loss43  34  3  3  
Prior service credit—  —  (5) (2) 
Net periodic benefit cost (credit)$31  $28  $(13) $(7) 
Pension BenefitsOther Postretirement Benefits
Six Months Ended June 30,
2020201920202019
(In millions)
Service cost$49  $42  $13  $11  
Interest cost93  109  28  35  
Expected return on plan assets(166) (162) (64) (62) 
Amortization of:
Net actuarial loss86  66  8  6  
Prior service credit—  —  (10) (4) 
Net periodic benefit cost (credit)$62  $55  $(25) $(14) 
DTE Electric participates in various plans that provide pension and other postretirement benefits for DTE Energy and its affiliates. The plans are sponsored by DTE Energy's subsidiary, DTE Energy Corporate Services, LLC. DTE Electric accounts for its participation in DTE Energy's qualified and non-qualified pension plans by applying multiemployer accounting. DTE Electric accounts for its participation in other postretirement benefit plans by applying multiple-employer accounting. Within multiemployer and multiple-employer plans, participants pool plan assets for investment purposes and to reduce the cost of plan administration. The primary difference between plan types is assets contributed in multiemployer plans can be used to provide benefits for all participating employers, while assets contributed within a multiple-employer plan are restricted for use by the contributing employer. As a result of multiemployer accounting treatment, capitalized costs associated with these plans are reflected in Property, plant, and equipment in DTE Electric's Consolidated Statements of Financial Position. The same capitalized costs are reflected as Regulatory assets and liabilities in DTE Energy's Consolidated Statements of Financial Position. In addition, the service cost and non-service cost components are presented in Operation and maintenance in DTE Electric's Consolidated Statements of Operations. The same non-service cost components are presented in Other (Income) and Deductions — Non-operating retirement benefits, net in DTE Energy's Consolidated Statements of Operations. Plan participants of all plans are solely DTE Energy and affiliate participants.
DTE Energy's subsidiaries are responsible for their share of qualified and non-qualified pension benefit costs. DTE Electric's allocated portion of pension benefit costs included in capital expenditures and operating and maintenance expense were $25 million and $22 million for the three months ended June 30, 2020 and 2019, respectively, and $51 million and $45 million for the six months ended June 30, 2020 and 2019, respectively. These amounts include recognized contractual termination benefit charges, curtailment gains, and settlement charges.
The following tables detail the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)(In millions)
Service cost$5  $4  $10  $8  
Interest cost10  14  21  27  
Expected return on plan assets(22) (21) (44) (42) 
Amortization of:
Net actuarial loss3  1  6  2  
Prior service credit(3) (3) (7) (4) 
Net periodic benefit credit$(7) $(5) $(14) $(9) 
At the discretion of management, and depending upon economic and financial market conditions, DTE Energy anticipates making up to $185 million in contributions to the qualified pension plans during 2020, including $160 million of DTE Electric contributions. DTE Energy does not anticipate making any contributions to its other postretirement benefit plans in 2020.
v3.20.2
Segment and Related Information
 6 Months Ended
Jun. 30, 2020
Segment Reporting [Abstract]  
Segment and Related Information SEGMENT AND RELATED INFORMATION
DTE Energy sets strategic goals, allocates resources, and evaluates performance based on the following structure:
Electric segment consists principally of DTE Electric, which is engaged in the generation, purchase, distribution, and sale of electricity to approximately 2.2 million residential, commercial, and industrial customers in southeastern Michigan.
Gas segment consists principally of DTE Gas, which is engaged in the purchase, storage, transportation, distribution, and sale of natural gas to approximately 1.3 million residential, commercial, and industrial customers throughout Michigan and the sale of storage and transportation capacity.
Gas Storage and Pipelines is primarily engaged in services related to the gathering, transportation, and storage of natural gas.
Power and Industrial Projects is comprised primarily of projects that deliver energy and utility-type products and services to industrial, commercial, and institutional customers, produce reduced emissions fuel, and sell electricity and pipeline-quality gas from renewable energy projects.
Energy Trading consists of energy marketing and trading operations.
Corporate and Other includes various holding company activities, holds certain non-utility debt, and holds energy-related investments.
The federal income tax provisions or benefits of DTE Energy’s subsidiaries are determined on an individual company basis and recognize the tax benefit of tax credits and net operating losses, if applicable. The state and local income tax provisions of the utility subsidiaries are determined on an individual company basis and recognize the tax benefit of various tax credits and net operating losses, if applicable. The subsidiaries record federal, state, and local income taxes payable to or receivable from DTE Energy based on the federal, state, and local tax provisions of each company.
Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of the sale of reduced emissions fuel, power sales, and natural gas sales in the following segments:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Electric$15  $13  $30  $27  
Gas4  3  8  5  
Gas Storage and Pipelines5  3  9  6  
Power and Industrial Projects80  157  174  302  
Energy Trading8  5  14  12  
Corporate and Other—  —  1  1  
$112  $181  $236  $353  
Financial data of DTE Energy's business segments follows:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
Electric$1,309  $1,190  $2,521  $2,425  
Gas251  243  791  888  
Operating Revenues — Non-utility operations
Electric3  —  7  —  
Gas Storage and Pipelines172  121  342  237  
Power and Industrial Projects219  402  526  790  
Energy Trading740  1,113  1,653  2,414  
Corporate and Other1  —  1  1  
Reconciliation and Eliminations(112) (181) (236) (353) 
Total$2,583  $2,888  $5,605  $6,402  
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Net Income (Loss) Attributable to DTE Energy by Segment:
Electric$183  $133  $277  $280  
Gas1  8  122  159  
Gas Storage and Pipelines70  50  142  98  
Power and Industrial Projects25  29  55  55  
Energy Trading(1) (6) 33  26  
Corporate and Other(1) (32) (12) (35) 
Net Income Attributable to DTE Energy Company$277  $182  $617  $583  
v3.20.2
Related Party Transactions
 6 Months Ended
Jun. 30, 2020
Related Party Transactions [Abstract]  
Related Party Transactions RELATED PARTY TRANSACTIONS
DTE Energy enters into related party transactions with certain equity method investees, primarily NEXUS.
DTE Gas is party to a 15-year capacity lease agreement with NEXUS for the transportation of natural gas. Under the lease agreement, DTE Gas provides firm pipeline capacity in the DTE Gas system in order for NEXUS to provide service to its customers from an interconnect between NEXUS and DTE Gas. DTE Gas charges NEXUS a fixed daily pipeline reservation charge for this capacity.
DTE Electric and DTE Gas are also party to respective 20-year and 15-year service agreements with NEXUS for the transportation of natural gas. Under the service agreements, NEXUS provides firm pipeline capacity to transport natural gas to DTE Electric and to service DTE Gas customers. DTE Electric and DTE Gas incur a firm daily pipeline reservation charge, which is recovered through the respective PSCR and GCR mechanisms.
DTE Energy Trading also enters into related party transactions with NEXUS for the transportation of natural gas.
The following table summarizes the amounts resulting from these transactions included in the Consolidated Statements of Operations:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
DTE Gas$8  $8  $16  $16  
Fuel, purchased power, and gas — utility
DTE Electric$2  $2  $4  $4  
DTE Gas$6  $6  $12  $13  
Fuel, purchased power, and gas — non-utility
DTE Energy Trading$6  $1  $13  $3  
Other related party transactions with equity method investees include transactions with Vector Pipeline and Millennium Pipeline. These transactions were not material for the three and six months ended June 30, 2020 and 2019.
v3.20.2
Significant Accounting Policies (Policies)
 6 Months Ended
Jun. 30, 2020
Accounting Policies [Abstract]  
Basis of Presentation
Basis of Presentation
The Consolidated Financial Statements should be read in conjunction with the Combined Notes to Consolidated Financial Statements included in the combined DTE Energy and DTE Electric 2019 Annual Report on Form 10-K.
The accompanying Consolidated Financial Statements of the Registrants are prepared using accounting principles generally accepted in the United States of America. These accounting principles require management to use estimates and assumptions that impact reported amounts of assets, liabilities, revenues and expenses, and the disclosure of contingent assets and liabilities. Actual results may differ from the Registrants' estimates.
The Consolidated Financial Statements are unaudited but, in the Registrants' opinions, include all adjustments necessary to present a fair statement of the results for the interim periods. All adjustments are of a normal recurring nature, except as otherwise disclosed in these Consolidated Financial Statements and Combined Notes to Consolidated Financial Statements. Financial results for this interim period are not necessarily indicative of results that may be expected for any other interim period or for the fiscal year ending December 31, 2020.The information in these combined notes relates to each of the Registrants as noted in the Index of Combined Notes to Consolidated Financial Statements. However, DTE Electric does not make any representation as to information related solely to DTE Energy or the subsidiaries of DTE Energy other than itself
Reclassification .
Principles of Consolidation
Principles of Consolidation
The Registrants consolidate all majority-owned subsidiaries and investments in entities in which they have controlling influence. Non-majority owned investments are accounted for using the equity method when the Registrants are able to significantly influence the operating policies of the investee. When the Registrants do not influence the operating policies of an investee, the cost method is used. These Consolidated Financial Statements also reflect the Registrants' proportionate interests in certain jointly-owned utility plants. The Registrants eliminate all intercompany balances and transactions.
The Registrants evaluate whether an entity is a VIE whenever reconsideration events occur. The Registrants consolidate VIEs for which they are the primary beneficiary. If a Registrant is not the primary beneficiary and an ownership interest is held, the VIE is accounted for under the equity method of accounting. When assessing the determination of the primary beneficiary, a Registrant considers all relevant facts and circumstances, including: the power, through voting or similar rights, to direct the activities of the VIE that most significantly impact the VIE's economic performance and the obligation to absorb the expected losses and/or the right to receive the expected returns of the VIE. The Registrants perform ongoing reassessments of all VIEs to determine if the primary beneficiary status has changed.
Legal entities within DTE Energy's Power and Industrial Projects segment enter into long-term contractual arrangements with customers to supply energy-related products or services. The entities are generally designed to pass-through the commodity risk associated with these contracts to the customers, with DTE Energy retaining operational and customer default risk. These entities generally are VIEs and consolidated when DTE Energy is the primary beneficiary. In addition, DTE Energy has interests in certain VIEs through which control of all significant activities is shared with partners, and therefore are generally accounted for under the equity method.
DTE Energy currently owns an 85% interest in SGG, which owns and operates midstream natural gas assets. SGG has contracts through which certain construction risk is designed to pass-through to the customers, with DTE Energy retaining operational and customer default risk. SGG is a VIE with DTE Energy as the primary beneficiary.
The Registrants have variable interests in NEXUS, which include DTE Energy's 50% ownership interest and DTE Electric's transportation services contract. NEXUS is a joint venture which owns a 256-mile pipeline to transport Utica and Marcellus shale gas to Ohio, Michigan, and Ontario market centers. NEXUS also owns Generation Pipeline, LLC, a 23-mile regulated pipeline system located in northern Ohio, which was acquired in September 2019. NEXUS is a VIE as it has insufficient equity at risk to finance its activities. The Registrants are not the primary beneficiaries, as the power to direct significant activities is shared between the owners of the equity interests. DTE Energy accounts for its ownership interest in NEXUS under the equity method.
The Registrants hold ownership interests in certain limited partnerships. The limited partnerships include investment funds which support regional development and economic growth, as well as, an operational business providing energy-related products. These entities are generally VIEs as a result of certain characteristics of the limited partnership voting rights. The ownership interests are accounted for under the equity method as the Registrants are not the primary beneficiaries.
DTE Energy has variable interests in VIEs through certain of its long-term purchase and sale contracts. DTE Electric has variable interests in VIEs through certain of its long-term purchase contracts, including the transportation services contract with NEXUS. As of June 30, 2020, the carrying amount of assets and liabilities in DTE Energy's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase and sale contracts are predominantly related to working capital accounts and generally represent the amounts owed by or to DTE Energy for the deliveries associated with the current billing cycle under the contracts. As of June 30, 2020, the carrying amount of assets and liabilities in DTE Electric's Consolidated Statements of Financial Position that relate to its variable interests under long-term purchase contracts are predominantly related to working capital accounts and generally represent the amounts owed by DTE Electric for the deliveries associated with the current billing cycle under the contracts. The Registrants have not provided any significant form of financial support associated with these long-term contracts. There is no material potential exposure to loss as a result of DTE Energy's variable interests through these long-term purchase and sale contracts. In addition, there is no material potential exposure to loss as a result of DTE Electric's variable interests through these long-term purchase contracts.
The maximum risk exposure for consolidated VIEs is reflected on the Registrants' Consolidated Statements of Financial Position and, for DTE Energy, in Note 13 to the Consolidated Financial Statements, "Commitments and Contingencies," related to the REF guarantees and indemnities. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, future funding commitments, and amounts which DTE Energy has guaranteed. See Note 13 to the Consolidated Financial Statements, "Commitments and Contingencies," for further discussion of the NEXUS guarantee arrangements.
Changes in Accumulated Other Comprehensive Income (Loss)
Changes in Accumulated Other Comprehensive Income (Loss)
Comprehensive income (loss) is the change in common shareholders' equity during a period from transactions and events from non-owner sources, including Net Income. The amounts recorded to Accumulated other comprehensive income (loss) for DTE Energy include changes in benefit obligations, consisting of deferred actuarial losses and prior service costs, unrealized gains and losses from derivatives accounted for as cash flow hedges, and foreign currency translation adjustments. DTE Energy releases income tax effects from accumulated other comprehensive income when the circumstances upon which they are premised cease to exist.
Changes in Accumulated other comprehensive income (loss) are presented in DTE Energy's Consolidated Statements of Changes in Equity and DTE Electric's Consolidated Statements of Changes in Shareholder's Equity.
Cash, Cash Equivalents, and Restricted Cash
Cash, Cash Equivalents, and Restricted Cash
Cash and cash equivalents include cash on hand, cash in banks, and temporary investments purchased with remaining maturities of three months or less. Restricted cash consists of funds held in separate bank accounts to satisfy contractual obligations to fund certain construction projects and guarantee performance. Restricted cash designated for payments within one year is classified as a Current Asset.
Financing Receivables
Financing Receivables
The Registrants monitor the credit quality of their financing receivables on a regular basis by reviewing credit quality indicators and monitoring for trigger events, such as a credit rating downgrade or bankruptcy. Credit quality indicators include, but are not limited to, ratings by credit agencies where available, collection history, collateral, counterparty financial statements and other internal metrics. Utilizing such data, the Registrants have determined three internal grades of credit quality. Internal grade 1 includes financing receivables for counterparties where credit rating agencies have ranked the counterparty as investment grade. To the extent credit ratings are not available, the Registrants utilize other credit quality indicators to determine the level of risk associated with the financing receivable. Internal grade 1 may include financing receivables for counterparties for which credit rating agencies have ranked the counterparty as below investment grade, however, due to favorable information on other credit quality indicators, the Registrants have determined the risk level to be similar to that of an investment grade counterparty. Internal grade 2 includes financing receivables for counterparties with limited credit information and those with a higher risk profile based upon credit quality indicators. Internal grade 3 reflects financing receivables for which the counterparties have the greatest level of risk, including those in bankruptcy status.
The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through June 30, 2020.
DTE EnergyDTE Electric
Year of origination
202020192018 and priorTotal2020 and prior
(In millions)
Notes receivable
Internal grade 1$2  $9  $9  $20  $11  
Internal grade 238  13  7  58  —  
Total notes receivable(a)
$40  $22  $16  $78  $11  
Net investment in leases
Net investment in leases, internal grade 1$8  $—  $42  $50  $—  
Net investment in leases, internal grade 2132  —  1  133  —  
Total net investment in leases(a)
$140  $—  $43  $183  $—  
_______________________________________
(a)For DTE Energy, included in Current Assets — Other and Other Assets — Notes Receivable on the Consolidated Statements of Financial Position. For DTE Electric, included in Current Assets — Other and Other Assets — Other on the Consolidated Statements of Financial Position.
The allowance for doubtful accounts on accounts receivable for the utility entities is generally calculated using an aging approach that utilizes rates developed in reserve studies. DTE Electric and DTE Gas establish an allowance for uncollectible accounts based on historical losses and management's assessment of existing and future economic conditions, customer trends and other factors. Customer accounts are generally considered delinquent if the amount billed is not received by the due date, which is typically in 21 days, however, factors such as assistance programs may delay aggressive action. DTE Electric and DTE Gas generally assess late payment fees on trade receivables based on past-due terms with customers. Customer accounts are written off when collection efforts have been exhausted. The time period for write-off is 150 days after service has been terminated.
The customer allowance for doubtful accounts for non-utility businesses and other receivables for both utility and non-utility businesses is generally calculated based on specific review of probable future collections based on receivable balances generally in excess of 30 days. Existing and future economic conditions, customer trends and other factors are also considered. Receivables are written off on a specific identification basis and determined based upon the specific circumstances of the associated receivable.
Notes receivable, or financing receivables, for DTE Energy are primarily comprised of finance lease receivables and loans that are included in Notes Receivable and Other current assets on DTE Energy's Consolidated Statements of Financial Position. Notes receivable, or financing receivables, for DTE Electric are primarily comprised of loans.
Notes receivable are typically considered delinquent when payment is not received for periods ranging from 60 to 120 days. The Registrants cease accruing interest (nonaccrual status), consider a note receivable impaired, and establish an allowance for credit loss when it is probable that all principal and interest amounts due will not be collected in accordance with the contractual terms of the note receivable. In determining the allowance for credit losses for notes receivable, the Registrants consider the historical payment experience and other factors that are expected to have a specific impact on the counterparty's ability to pay including existing and future economic conditions.
DTE Energy has off balance sheet exposure in the form of a revolving credit facility. Refer to Note 13, "Commitments and Contingencies," for additional information. In determining the level of credit reserve needed, DTE considers the likelihood of funding in addition to the other factors noted above. A reserve may be established when it is likely that funding will occur. Cash payments received on nonaccrual status notes receivable, that do not bring the account contractually current, are first applied to the contractually owed past due interest, with any remainder applied to principal. Accrual of interest is generally resumed when the note receivable becomes contractually current.
Recently Adopted and Recently Issued Pronouncements
Recently Adopted Pronouncements
In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, as amended. The amendments in this update have replaced the previous incurred loss impairment methodology with a methodology that reflects expected credit losses and requires consideration of a broader range of reasonable and supportable information, including forecasts, to develop credit loss estimates. The ASU requires entities to use the new methodology to measure impairment of financial instruments, including accounts receivable, and may result in earlier recognition of credit losses than under previous generally accepted accounting principles. Entities must apply the new guidance as a cumulative-effect adjustment to retained earnings as of the beginning of the first reporting period in which the guidance is adopted. The Registrants adopted the standard effective January 1, 2020. The adoption of the ASU did not have an impact on the Registrants' financial position or results of operations. Additional required disclosures have been included in Note 2 to the Consolidated Financial Statements, “Significant Accounting Policies”.
In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurements (Topic 820): Disclosure Framework - Changes to the Disclosure Requirements for Fair Value Measurement. The amendments in this update modify the disclosure requirements on fair value measurements in Topic 820. The Registrants adopted the ASU effective January 1, 2020. The Registrants have updated Note 8 to the Consolidated Financial Statements, Fair Value, to incorporate the disclosure changes required by the ASU.
In August 2018, the FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That is a Service Contract. The amendments in this update align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal use software license). The Registrants adopted the standard effective January 1, 2020 using the prospective approach. The adoption of the ASU did not have an impact on the Registrants’ Consolidated Financial Statements. On a prospective basis, costs within the scope of this amendment will be accounted for consistent with any underlying service contracts. Capitalized implementation costs will be reflected in Other noncurrent assets on the Consolidated Statements of Financial Position and amortization of these costs will be reflected in Operation and maintenance within the Consolidated Statements of Operations. Cash flow activity will be reflected in the Other current and noncurrent assets and liabilities line within the Operating Activities section of the Consolidated Statements of Cash Flows.
In August 2018, the FASB issued ASU No. 2018-14, Compensation - Retirement Benefits - Defined Benefit Plans (Subtopic 715-20): Disclosure Framework - Changes to the Disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The amendments in this update modify the disclosure requirements for employers that sponsor defined benefit pension or other postretirement plans. The Registrants adopted the ASU effective January 1, 2020. The required disclosures for this ASU will be reflected in the 2020 year-end financial statements.
In October 2018, the FASB issued ASU No. 2018-17, Consolidation (Topic 810): Targeted Improvements to Related Party Guidance for Variable Interest Entities. The amendments in this update modify the requirements for determining whether fees paid to a decision maker or service provider are variable interests and require reporting entities to consider indirect interests held through related parties under common control on a proportional basis. The Registrants adopted the ASU effective January 1, 2020. The adoption of the ASU did not have a significant impact on the Registrants’ Consolidated Financial Statements.
Recently Issued Pronouncements
In December 2019, the FASB issued ASU No. 2019-12, Income Taxes (Topic 740) - Simplifying the Accounting for Income Taxes. The amendments in this update simplify the accounting for income taxes by removing certain exceptions, and clarifying certain requirements regarding franchise taxes, goodwill, consolidated tax expenses, and annual effective tax rate calculations. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2020. Early adoption is permitted. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
In March 2020, the FASB issued ASU No. 2020-04, Reference Rate Reform (Topic 848) - Facilitation of the Effects of Reference Rate Reform on Financial Reporting. The amendments in this update provide optional expedients and exceptions for applying GAAP to contracts, hedging relationships, and other transactions affected by reference rate reform if certain criteria are met. The ASU is effective for the Registrants beginning March 12, 2020 through December 31, 2022. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
Fair Value Measurement
Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date in a principal or most advantageous market. Fair value is a market-based measurement that is determined based on inputs, which refer broadly to assumptions that market participants use in pricing assets or liabilities. These inputs can be readily observable, market corroborated, or generally unobservable inputs. The Registrants make certain assumptions they believe that market participants would use in pricing assets or liabilities, including assumptions about risk, and the risks inherent in the inputs to valuation techniques. Credit risk of the Registrants and their counterparties is incorporated in the valuation of assets and liabilities through the use of credit reserves, the impact of which was immaterial at June 30, 2020 and December 31, 2019. The Registrants believe they use valuation techniques that maximize the use of observable market-based inputs and minimize the use of unobservable inputs.
A fair value hierarchy has been established that prioritizes the inputs to valuation techniques used to measure fair value in three broad levels. The fair value hierarchy gives the highest priority to quoted prices (unadjusted) in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). In some cases, the inputs used to measure fair value might fall in different levels of the fair value hierarchy. All assets and liabilities are required to be classified in their entirety based on the lowest level of input that is significant to the fair value measurement in its entirety. Assessing the significance of a particular input may require judgment considering factors specific to the asset or liability and may affect the valuation of the asset or liability and its placement within the fair value hierarchy. The Registrants classify fair value balances based on the fair value hierarchy defined as follows:
•Level 1 — Consists of unadjusted quoted prices in active markets for identical assets or liabilities that the Registrants have the ability to access as of the reporting date.
•Level 2 — Consists of inputs other than quoted prices included within Level 1 that are directly observable for the asset or liability or indirectly observable through corroboration with observable market data.
•Level 3 — Consists of unobservable inputs for assets or liabilities whose fair value is estimated based on internally developed models or methodologies using inputs that are generally less readily observable and supported by little, if any, market activity at the measurement date. Unobservable inputs are developed based on the best available information and subject to cost-benefit constraints.
Nuclear Decommissioning Trusts and Other Investments
Nuclear Decommissioning Trusts and Other Investments
The nuclear decommissioning trusts and other investments hold debt and equity securities directly and indirectly through commingled funds. Exchange-traded debt and equity securities held directly are valued using quoted market prices in actively traded markets. Commingled funds that hold exchange-traded equity or debt securities are valued based on stated NAVs. Non-exchange traded fixed income securities are valued based upon quotations available from brokers or pricing services.
Private equity and other assets include a diversified group of funds that are classified as NAV assets. These funds primarily invest in private equity partnerships, as well as real estate and private debt. Distributions are received through the liquidation of the underlying fund assets over the life of the funds. There are generally no redemption rights. The limited partner must hold the fund for its life or find a third-party buyer, which may need to be approved by the general partner. The funds are established with varied contractual durations generally in the range of 7 years to 12 years. The fund life can often be extended by several years by the general partner, and further extended with the approval of the limited partners. Unfunded commitments related to these investments totaled $195 million and $151 million as of June 30, 2020 and December 31, 2019, respectively.
For pricing the nuclear decommissioning trusts and other investments, a primary price source is identified by asset type, class, or issue for each security. The trustee monitors prices supplied by pricing services and may use a supplemental price source or change the primary source of a given security if the trustee determines that another price source is considered preferable. The Registrants have obtained an understanding of how these prices are derived, including the nature and observability of the inputs used in deriving such prices.
Derivative Assets and Liabilities
Derivative Assets and Liabilities
Derivative assets and liabilities are comprised of physical and financial derivative contracts, including futures, forwards, options, and swaps that are both exchange-traded and over-the-counter traded contracts. Various inputs are used to value derivatives depending on the type of contract and availability of market data. Exchange-traded derivative contracts are valued using quoted prices in active markets. The Registrants consider the following criteria in determining whether a market is considered active: frequency in which pricing information is updated, variability in pricing between sources or over time, and the availability of public information. Other derivative contracts are valued based upon a variety of inputs including commodity market prices, broker quotes, interest rates, credit ratings, default rates, market-based seasonality, and basis differential factors. The Registrants monitor the prices that are supplied by brokers and pricing services and may use a supplemental price source or change the primary price source of an index if prices become unavailable or another price source is determined to be more representative of fair value. The Registrants have obtained an understanding of how these prices are derived. Additionally, the Registrants selectively corroborate the fair value of their transactions by comparison of market-based price sources. Mathematical valuation models are used for derivatives for which external market data is not readily observable, such as contracts which extend beyond the actively traded reporting period. The Registrants have established a Risk Management Committee whose responsibilities include directly or indirectly ensuring all valuation methods are applied in accordance with predefined policies. The development and maintenance of the Registrants' forward price curves has been assigned to DTE Energy's Risk Management Department, which is separate and distinct from the trading functions within DTE Energy.
Fair Value Transfer Derivatives are transferred between levels primarily due to changes in the source data used to construct price curves as a result of changes in market liquidity. Transfers in and transfers out are reflected as if they had occurred at the beginning of the period.
Derivatives
The Registrants recognize all derivatives at their fair value as Derivative assets or liabilities on their respective Consolidated Statements of Financial Position unless they qualify for certain scope exceptions, including the normal purchases and normal sales exception. Further, derivatives that qualify and are designated for hedge accounting are classified as either hedges of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge); or as hedges of the fair value of a recognized asset or liability or of an unrecognized firm commitment (fair value hedge). For cash flow hedges, the derivative gain or loss is deferred in Accumulated other comprehensive income (loss) and later reclassified into earnings when the underlying transaction occurs. For fair value hedges, changes in fair values for the derivative and hedged item are recognized in earnings each period. For derivatives that do not qualify or are not designated for hedge accounting, changes in fair value are recognized in earnings each period.
The Registrants' primary market risk exposure is associated with commodity prices, credit, and interest rates. The Registrants have risk management policies to monitor and manage market risks. The Registrants use derivative instruments to manage some of the exposure. DTE Energy uses derivative instruments for trading purposes in its Energy Trading segment. Contracts classified as derivative instruments include electricity, natural gas, oil, certain environmental contracts, forwards, futures, options, swaps, and foreign currency exchange contracts. Items not classified as derivatives include natural gas and environmental inventory, pipeline transportation contracts, certain environmental contracts, and natural gas storage assets.
DTE Electric — DTE Electric generates, purchases, distributes, and sells electricity. DTE Electric uses forward contracts to manage changes in the price of electricity and fuel. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Other derivative contracts are MTM and recoverable through the PSCR mechanism when settled. This results in the deferral of unrealized gains and losses as Regulatory assets or liabilities until realized.
DTE Gas — DTE Gas purchases, stores, transports, distributes, and sells natural gas, and buys and sells transportation and storage capacity. DTE Gas has fixed-priced contracts for portions of its expected natural gas supply requirements through March 2023. Substantially all of these contracts meet the normal purchases and normal sales exception and are therefore accounted for under the accrual method. Forward transportation and storage contracts are generally not derivatives and are therefore accounted for under the accrual method.
Gas Storage and Pipelines — This segment is primarily engaged in services related to the gathering, transportation, and storage of natural gas. Primarily fixed-priced contracts are used in the marketing and management of transportation and storage services. Generally, these contracts are not derivatives and are therefore accounted for under the accrual method.
Power and Industrial Projects — This segment manages and operates energy and pulverized coal projects, a coke battery, reduced emissions fuel projects, renewable gas recovery, and power generation assets. Primarily fixed-price contracts are used in the marketing and management of the segment assets. These contracts are generally not derivatives and are therefore accounted for under the accrual method.
Energy Trading — Commodity Price Risk — Energy Trading markets and trades electricity, natural gas physical products, and energy financial instruments, and provides energy and asset management services utilizing energy commodity derivative instruments. Forwards, futures, options, and swap agreements are used to manage exposure to the risk of market price and volume fluctuations in its operations. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met.
Energy Trading — Foreign Currency Exchange Risk — Energy Trading has foreign currency exchange forward contracts to economically hedge fixed Canadian dollar commitments existing under natural gas and power purchase and sale contracts and natural gas transportation contracts. Energy Trading enters into these contracts to mitigate price volatility with respect to fluctuations of the Canadian dollar relative to the U.S. dollar. These derivatives are accounted for by recording changes in fair value to earnings unless hedge accounting criteria are met.
Corporate and Other — Interest Rate Risk — DTE Energy may use interest rate swaps, treasury locks, and other derivatives to hedge the risk associated with interest rate market volatility.
Credit Risk — DTE Energy maintains credit policies that significantly minimize overall credit risk. These policies include an evaluation of potential customers’ and counterparties’ financial condition, including the viability of underlying productive assets, credit rating, collateral requirements, or other credit enhancements such as letters of credit or guarantees. DTE Energy generally uses standardized agreements that allow the netting of positive and negative transactions associated with a single counterparty. DTE Energy maintains a provision for credit losses based on factors surrounding the credit risk of its customers, historical trends, and other information. Based on DTE Energy's credit policies and its June 30, 2020 provision for credit losses, DTE Energy’s exposure to counterparty nonperformance is not expected to have a material adverse effect on DTE Energy's Consolidated Financial Statements.
Derivatives, Offsetting Fair Value Amounts
Certain of DTE Energy's derivative positions are subject to netting arrangements which provide for offsetting of asset and liability positions as well as related cash collateral. Such netting arrangements generally do not have restrictions. Under such netting arrangements, DTE Energy offsets the fair value of derivative instruments with cash collateral received or paid for those contracts executed with the same counterparty, which reduces DTE Energy's Total Assets and Liabilities. Cash collateral is allocated between the fair value of derivative instruments and customer accounts receivable and payable with the same counterparty on a pro-rata basis to the extent there is exposure. Any cash collateral remaining, after the exposure is netted to zero, is reflected in Accounts receivable and Accounts payable as collateral paid or received, respectively.
DTE Energy also provides and receives collateral in the form of letters of credit which can be offset against net Derivative assets and liabilities as well as Accounts receivable and payable. DTE Energy had issued letters of credit of $6 million outstanding at June 30, 2020 and December 31, 2019 which could be used to offset net Derivative liabilities. Letters of credit received from third parties which could be used to offset net Derivative assets were $4 million at June 30, 2020 and December 31, 2019. Such balances of letters of credit are excluded from the tables below and are not netted with the recognized assets and liabilities in DTE Energy's Consolidated Statements of Financial Position.
For contracts with certain clearing agents, the fair value of derivative instruments is netted against realized positions with the net balance reflected as either 1) a Derivative asset or liability or 2) an Account receivable or payable. Other than certain clearing agents, Accounts receivable and Accounts payable that are subject to netting arrangements have not been offset against the fair value of Derivative assets and liabilities.
Derivatives, Methods of Accounting, Derivatives Not Designated or Qualifying as Hedges Revenues and energy costs related to trading contracts are presented on a net basis in DTE Energy's Consolidated Statements of Operations. Commodity derivatives used for trading purposes, and financial non-trading commodity derivatives, are accounted for using the MTM method with unrealized and realized gains and losses recorded in Operating Revenues — Non-utility operations. Non-trading physical commodity sale and purchase derivative contracts are generally accounted for using the MTM method with unrealized and realized gains and losses for sales recorded in Operating Revenues — Non-utility operations and purchases recorded in Fuel, purchased power, and gas — non-utility.
Income Tax The federal income tax provisions or benefits of DTE Energy’s subsidiaries are determined on an individual company basis and recognize the tax benefit of tax credits and net operating losses, if applicable. The state and local income tax provisions of the utility subsidiaries are determined on an individual company basis and recognize the tax benefit of various tax credits and net operating losses, if applicable. The subsidiaries record federal, state, and local income taxes payable to or receivable from DTE Energy based on the federal, state, and local tax provisions of each company.
v3.20.2
Organization and Basis of Presentation (Tables)
 6 Months Ended
Jun. 30, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Variable Interest Entities
The following table summarizes the major Consolidated Statements of Financial Position items for consolidated VIEs as of June 30, 2020 and December 31, 2019. All assets and liabilities of a consolidated VIE are presented where it has been determined that a consolidated VIE has either (1) assets that can be used only to settle obligations of the VIE or (2) liabilities for which creditors do not have recourse to the general credit of the primary beneficiary. VIEs, in which DTE Energy holds a majority voting interest and is the primary beneficiary, that meet the definition of a business and whose assets can be used for purposes other than the settlement of the VIE's obligations have been excluded from the table below.
Amounts for DTE Energy's consolidated VIEs are as follows:
June 30, 2020December 31, 2019
SGG(a)
OtherTotal
SGG(a)
OtherTotal
(In millions)
ASSETS
Cash and cash equivalents$26  $16  $42  $16  $11  $27  
Accounts receivable8  24  32  8  19  27  
Inventories—  98  98  —  74  74  
Property, plant, and equipment, net406  28  434  410  33  443  
Goodwill25  —  25  25  —  25  
Intangible assets535  —  535  542  —  542  
Other current and long-term assets—  8  8  2  —  2  
$1,000  $174  $1,174  $1,003  $137  $1,140  
LIABILITIES
Accounts payable and accrued current liabilities$—  $13  $13  $2  $13  $15  
Short term borrowings—  14  14  —  —  —  
Other current and long-term liabilities7  7  14  7  7  14  
$7  $34  $41  $9  $20  $29  
_____________________________________
(a)Amounts shown are 100% of SGG's assets and liabilities, of which DTE Energy owns 85% at June 30, 2020 and December 31, 2019.
Summary of Amounts for Non-Consolidated Variable Interest Entities
Amounts for DTE Energy's non-consolidated VIEs are as follows:
June 30, 2020December 31, 2019
(In millions)
Investments in equity method investees$1,500  $1,503  
Notes receivable$34  $21  
Future funding commitments$32  $63  
v3.20.2
Significant Accounting Policies (Tables)
 6 Months Ended
Jun. 30, 2020
Accounting Policies [Abstract]  
Schedule of Other Income
The following is a summary of DTE Energy's Other income:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Equity earnings of equity method investees$30  $20  $59  $43  
Income from REF entities29  29  52  56  
Gains from equity and fixed income securities22  7  22  24  
Allowance for equity funds used during construction7  6  13  13  
Contract services6  6  13  14  
Other7  5  7  11  
$101  $73  $166  $161  
The following is a summary of DTE Electric's Other income:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Gains from equity and fixed income securities allocated from DTE Energy$22  $7  $22  $24  
Contract services6  8  13  16  
Allowance for equity funds used during construction6  6  12  12  
Other3  4  3  6  
$37  $25  $50  $58  
Schedule of Effective Tax Rates
The interim effective tax rates of the Registrants are as follows:
Effective Tax Rate
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
DTE Energy2 %11 %8 %11 %
DTE Electric12 %16 %12 %16 %
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk
The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through June 30, 2020.
DTE EnergyDTE Electric
Year of origination
202020192018 and priorTotal2020 and prior
(In millions)
Notes receivable
Internal grade 1$2  $9  $9  $20  $11  
Internal grade 238  13  7  58  —  
Total notes receivable(a)
$40  $22  $16  $78  $11  
Net investment in leases
Net investment in leases, internal grade 1$8  $—  $42  $50  $—  
Net investment in leases, internal grade 2132  —  1  133  —  
Total net investment in leases(a)
$140  $—  $43  $183  $—  
_______________________________________
(a)For DTE Energy, included in Current Assets — Other and Other Assets — Notes Receivable on the Consolidated Statements of Financial Position. For DTE Electric, included in Current Assets — Other and Other Assets — Other on the Consolidated Statements of Financial Position.
Schedule of Roll-Forward of Activity for Financing Receivables Credit Loss Reserves
The following table presents a roll-forward of the activity for the Registrants' financing receivables credit loss reserves as of June 30, 2020.
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2020$87  $4  $91  $46  
Current period provision 54  2  56  32  
Write-offs charged against allowance(89) (2) (91) (51) 
Recoveries of amounts previously written off29  (1) 28  17  
Ending reserve balance, June 30, 2020$81  $3  $84  $44  
v3.20.2
Acquisitions (Tables)
 6 Months Ended
Jun. 30, 2020
Business Combinations [Abstract]  
Schedule of Final Purchase Price Allocation
The acquisition was accounted for using the acquisition method of accounting for business combinations. Accordingly, the cost was allocated to the underlying net assets based on their respective fair values as shown below:
(In millions)
Contract intangibles$17  
Property, plant, and equipment, net76  
Working capital2  
Total$95  
The acquisition was accounted for using the acquisition method of accounting for business combinations. Accordingly, the cost was allocated to the underlying net assets based on their respective fair values as shown below:
(In millions)
Contract intangibles$109  
Property, plant, and equipment, net60  
Working capital6  
Total$175  
The components of the preliminary purchase price allocation, inclusive of purchase accounting adjustments, are as follows:
(In millions)
Assets
Cash$62  
Accounts receivable31  
Property, plant, and equipment, net1,035  
Goodwill172  
Customer relationship intangibles1,473  
Other current assets1  
$2,774  
Liabilities
Accounts payable$26  
Acquisition related deferred payment380  
Other current liabilities2  
Asset retirement obligations9  
$417  
Total cash consideration$2,357  
v3.20.2
Revenue (Tables)
 6 Months Ended
Jun. 30, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following is a summary of revenues disaggregated by segment for DTE Energy:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Electric(a)
Residential$671  $494  $1,269  $1,047  
Commercial389  423  815  843  
Industrial120  158  276  322  
Other(b)
132  115  168  213  
Total Electric operating revenues(c)
$1,312  $1,190  $2,528  $2,425  
Gas
Gas sales$169  $163  $563  $640  
End User Transportation43  42  120  122  
Intermediate Transportation16  15  42  41  
Other(b)
23  23  66  85  
Total Gas operating revenues(d)
$251  $243  $791  $888  
Other segment operating revenues
Gas Storage and Pipelines(e)
$172  $121  $342  $237  
Power and Industrial Projects(f)
$219  $402  $526  $790  
Energy Trading(g)
$740  $1,113  $1,653  $2,414  
_______________________________________
(a)Revenues generally represent those of DTE Electric, except $3 million and $7 million of Other revenues related to DTE Sustainable Generation for the three and six months ended June 30, 2020, respectively.
(b)Includes revenue adjustments related to various regulatory mechanisms.
(c)Includes $5 million of other revenues outside the scope of topic 606 for the three months ended June 30, 2020 and 2019, and $10 million and $8 million for the six months ended June 30, 2020 and 2019, respectively.
(d)Includes $2 million under Alternative Revenue Programs for the six months ended June 30, 2020 and $3 million and $5 million of other revenues for the three and six months ended June 30, 2020, respectively, which are all outside the scope of Topic 606. For prior period, revenues include $3 million under Alternative Revenue Programs for the six months ended June 30, 2019 and $2 million and $4 million of other revenues for the three and six months ended June 30, 2019, respectively, which are all outside the scope of Topic 606.
(e)Includes revenues outside the scope of Topic 606 primarily related to $2 million of contracts accounted for as leases for the three months ended June 30, 2020 and 2019, and $4 million for the six months ended June 30, 2020 and 2019.
(f)Includes revenues outside the scope of Topic 606 primarily related to $21 million and $30 million of contracts accounted for as leases for the three months ended June 30, 2020 and 2019, respectively, and $48 million and $61 million for the six months ended June 30, 2020 and 2019, respectively.
(g)Includes revenues outside the scope of Topic 606 primarily related to $467 million and $879 million of derivatives for the three months ended June 30, 2020 and 2019, respectively, and $1.1 billion and $1.8 billion of derivatives for the six months ended June 30, 2020 and 2019, respectively.
Summary of Deferred Revenue Activity
The following is a summary of deferred revenue activity:
DTE Energy
(In millions)
Beginning Balance, January 1, 2020$75  
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period34  
Revenue recognized that was included in the deferred revenue balance at the beginning of the period(12) 
Ending Balance, June 30, 2020$97  
Deferred Revenue Amounts Expected to be Recognized as Revenue in Future Periods
The following table represents deferred revenue amounts for DTE Energy that are expected to be recognized as revenue in future periods:
DTE Energy
(In millions)
2020$53  
202116  
20227  
20233  
20247  
2025 and thereafter11  
$97  
The Registrants expect to recognize revenue for the following amounts related to fixed consideration associated with remaining performance obligations in each of the future periods noted:
DTE EnergyDTE Electric
(In millions)
2020$122  $4  
2021349  8  
2022291  7  
2023228  7  
2024143  7  
2025 and thereafter578  1  
$1,711  $34  
v3.20.2
Earnings Per Share (Tables)
 6 Months Ended
Jun. 30, 2020
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following is a reconciliation of DTE Energy's basic and diluted income per share calculation:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company$277  $182  $617  $583  
Less: Allocation of earnings to net restricted stock awards—  —  1  1  
Net income available to common shareholders — basic$277  $182  $616  $582  
Average number of common shares outstanding — basic192  183  192  183  
Basic Earnings per Common Share$1.44  $0.99  $3.20  $3.19  
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company$277  $182  $617  $583  
Less: Allocation of earnings to net restricted stock awards—  —  1  1  
Net income available to common shareholders — diluted$277  $182  $616  $582  
Average number of common shares outstanding — basic192  183  192  183  
Incremental shares attributable to:
Average dilutive equity units, performance share awards, and stock options1  1  —  —  
Average number of common shares outstanding — diluted193  184  192  183  
Diluted Earnings per Common Share(a)
$1.44  $0.99  $3.20  $3.18  
_______________________________________
(a)Equity Units excluded from the calculation of diluted EPS were approximately 10.3 million for the three and six months ended June 30, 2020, as the dilutive stock price threshold was not met.
v3.20.2
Fair Value (Tables)
 6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Assets and Liabilities Measured and Recorded at Fair Value on a Recurring Basis
The following table presents assets and liabilities for DTE Energy measured and recorded at fair value on a recurring basis(a):
June 30, 2020December 31, 2019
Level
1		Level
2		Level
3
Other(b)
Netting(c)
Net BalanceLevel
1		Level
2		Level
3
Other(b)
Netting(c)
Net Balance
(In millions)
Assets
Cash equivalents(d)
$331  $—  $—  $—  $—  $331  $15  $—  $—  $—  $—  $15  
Nuclear decommissioning trusts
Equity securities973  —  —  —  —  973  1,046  —  —  —  —  1,046  
Fixed income securities137  372  —  —  —  509  160  378  —  —  —  538  
Private equity and other—  —  —  62  —  62  —  —  —  43  —  43  
Cash equivalents59  —  —  —  —  59  34  —  —  —  —  34  
Other investments(e)
Equity securities42  —  —  —  —  42  140  —  —  —  —  140  
Fixed income securities6  —  —  —  —  6  79  —  —  —  —  79  
Cash equivalents177  —  —  —  —  177  4  —  —  —  —  4  
Derivative assets
Commodity contracts(f)
Natural gas100  79  71  —  (173) 77  205  76  74  —  (266) 89  
Electricity—  155  68  —  (165) 58  —  223  83  —  (225) 81  
Environmental & Other—  217  10  —  (217) 10  —  110  3  —  (110) 3  
Foreign currency exchange contracts—  3  —  —  —  3  —  1  —  —  —  1  
Total derivative assets100  454  149  —  (555) 148  205  410  160  —  (601) 174  
Total$1,825  $826  $149  $62  $(555) $2,307  $1,683  $788  $160  $43  $(601) $2,073  
Liabilities
Derivative liabilities
Commodity contracts(f)
Natural gas$(123) $(52) $(51) $—  $173  $(53) $(221) $(41) $(89) $—  $266  $(85) 
Electricity—  (159) (52) —  165  (46) —  (231) (67) —  225  (73) 
Environmental & Other(3) (199) —  —  217  15  —  (121) —  —  110  (11) 
Foreign currency exchange contracts—  (1) —  —  —  (1) —  —  —  —  —  —  
Total$(126) $(411) $(103) $—  $555  $(85) $(221) $(393) $(156) $—  $601  $(169) 
Net Assets at end of period$1,699  $415  $46  $62  $—  $2,222  $1,462  $395  $4  $43  $—  $1,904  
Assets
Current$425  $329  $108  $—  $(426) $436  $218  $320  $123  $—  $(513) $148  
Noncurrent1,400  497  41  62  (129) 1,871  1,465  468  37  43  (88) 1,925  
Total Assets$1,825  $826  $149  $62  $(555) $2,307  $1,683  $788  $160  $43  $(601) $2,073  
Liabilities
Current$(117) $(298) $(63) $—  $426  $(52) $(211) $(300) $(85) $—  $513  $(83) 
Noncurrent(9) (113) (40) —  129  (33) (10) (93) (71) —  88  (86) 
Total Liabilities$(126) $(411) $(103) $—  $555  $(85) $(221) $(393) $(156) $—  $601  $(169) 
Net Assets at end of period$1,699  $415  $46  $62  $—  $2,222  $1,462  $395  $4  $43  $—  $1,904  
_______________________________________
(a)See footnotes on following page.
_______________________________________
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)Amounts represent the impact of master netting agreements that allow DTE Energy to net gain and loss positions and cash collateral held or placed with the same counterparties.
(d)At June 30, 2020, the $331 million consisted of $330 million and $1 million of cash equivalents included in Cash and cash equivalents and Restricted cash on DTE Energy's Consolidated Statements of Financial Position, respectively. At December 31, 2019, the $15 million consisted of $4 million and $11 million of cash equivalents included in Cash and cash equivalents and Other investments on DTE Energy's Consolidated Statements of Financial Position, respectively.
(e)Excludes cash surrender value of life insurance investments.
(f)For contracts with a clearing agent, DTE Energy nets all activity across commodities. This can result in some individual commodities having a contra balance.
The following table presents assets for DTE Electric measured and recorded at fair value on a recurring basis as of:
June 30, 2020December 31, 2019
Level 1Level 2Level 3
Other(a)
Net BalanceLevel 1Level 2Level 3
Other(a)
Net Balance
(In millions)
Assets
Cash equivalents(b)
$205  $—  $—  $—  $205  $11  $—  $—  $—  $11  
Nuclear decommissioning trusts
Equity securities973  —  —  —  973  1,046  —  —  —  1,046  
Fixed income securities137  372  —  —  509  160  378  —  —  538  
Private equity and other—  —  —  62  62  —  —  —  43  43  
Cash equivalents59  —  —  —  59  34  —  —  —  34  
Other investments
Equity securities13  —  —  —  13  13  —  —  —  13  
Cash equivalents11  —  —  —  11  —  —  —  —  —  
Derivative assets — FTRs—  —  10  —  10  —  —  3  —  3  
Total$1,398  $372  $10  $62  $1,842  $1,264  $378  $3  $43  $1,688  
Assets
Current$205  $—  $10  $—  $215  $11  $—  $3  $—  $14  
Noncurrent1,193  372  —  62  1,627  1,253  378  —  43  1,674  
Total Assets$1,398  $372  $10  $62  $1,842  $1,264  $378  $3  $43  $1,688  
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
(b)At June 30, 2020, the $205 million of cash equivalents was included in Cash and cash equivalents on DTE Electric's Consolidated Statements of Financial Position. At December 31, 2019, the $11 million of cash equivalents was included in Other investments on DTE Electric's Consolidated Statements of Financial Position.
Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis
The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Energy:
Three Months Ended June 30, 2020Three Months Ended June 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of March 31$8  $15  $1  $24  $(10) $(25) $2  $(33) 
Transfers into Level 3 from Level 22  —  —  2  1  —  —  1  
Transfers from Level 3 into Level 2(5) —  —  (5) —  —  —  —  
Total gains (losses)
Included in earnings
12  33  (8) 37  (1) 41  —  40  
Recorded in Regulatory liabilities—  —  14  14  —  —  9  9  
Purchases, issuances, and settlements
Settlements3  (32) 3  (26) —  (6) (2) (8) 
Net Assets (Liabilities) as of June 30$20  $16  $10  $46  $(10) $10  $9  $9  
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019(a)
$18  $20  $(16) $22  $(1) $38  $(4) $33  
_______________________________________
(a)Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, and gas — non-utility in DTE Energy's Consolidated Statements of Operations

Six Months Ended June 30, 2020Six Months Ended June 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of December 31$(15) $16  $3  $4  $(49) $(2) $7  $(44) 
Transfers from Level 3 into Level 2(4) —  —  (4) —  —  —  —  
Total gains (losses)
Included in earnings
36  53  (8) 81  31  10  (1) 40  
Recorded in Regulatory liabilities—  —  12  12  —  —  7  7  
Purchases, issuances, and settlements
Settlements3  (53) 3  (47) 8  2  (4) 6  
Net Assets (Liabilities) as of June 30$20  $16  $10  $46  $(10) $10  $9  $9  
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019(a)
$37  $42  $(16) $63  $16  $17  $(5) $28  
_______________________________________
(a)Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, and gas — non-utility in DTE Energy's Consolidated Statements of Operations
The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Electric:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Net Assets as of beginning of period$1  $2  $3  $6  
Change in fair value recorded in Regulatory liabilities14  9  12  7  
Purchases, issuances, and settlements
Settlements(5) (2) (5) (4) 
Net Assets as of June 30$10  $9  $10  $9  
The amount of total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets held at June 30, 2020 and 2019 and reflected in DTE Electric's Consolidated Statements of Financial Position$10  $9  $10  $9  
Unobservable Inputs Related to Level 3 Assets and Liabilities
The following tables present the unobservable inputs related to DTE Energy's Level 3 assets and liabilities:
June 30, 2020
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$71  $(51) Discounted Cash FlowForward basis price (per MMBtu)$(0.74) —$4.18 /MMBtu$(0.06)/MMBtu
Electricity$68  $(52) Discounted Cash FlowForward basis price (per MWh)$(10) —$14 /MWh$(1)/MWh
December 31, 2019
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$74  $(89) Discounted Cash FlowForward basis price (per MMBtu)$(1.78) —$5.78 /MMBtu$(0.09)/MMBtu
Electricity$83  $(67) Discounted Cash FlowForward basis price (per MWh)$(10) —$6 /MWh$— /MWh
Carrying Amount of Fair Value of Financial Instruments
The following table presents the carrying amount and fair value of financial instruments for DTE Energy:
June 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a), excluding lessor finance leases
$78  $—  $—  $78  $184  $—  $—  $184  
Short-term borrowings$914  $—  $914  $—  $828  $—  $828  $—  
Notes payable — Other(b)
$15  $—  $—  $15  $25  $—  $—  $25  
Long-term debt(c)
$17,997  $2,299  $15,952  $1,845  $16,606  $2,572  $14,207  $1,252  
_______________________________________
(a)Current portion included in Current Assets — Other on DTE Energy's Consolidated Statements of Financial Position.
(b)Included in Current Liabilities — Other and Other Liabilities — Other on DTE Energy's Consolidated Statements of Financial Position.
(c)Includes debt due within one year, unamortized debt discounts, and issuance costs. Excludes finance lease obligations.
The following table presents the carrying amount and fair value of financial instruments for DTE Electric:
June 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a)
$11  $—  $—  $11  $9  $—  $—  $9  
Short-term borrowings — affiliates$107  $—  $—  $107  $97  $—  $—  $97  
Short-term borrowings — other$200  $—  $200  $—  $354  $—  $354  $—  
Notes payable — Other(b)
$11  $—  $—  $11  $21  $—  $—  $21  
Long-term debt(c)
$8,566  $—  $9,821  $193  $7,180  $—  $7,916  $173  
_______________________________________
(a)Included in Current Assets — Other and Other Assets — Other on DTE Electric's Consolidated Statements of Financial Position.
(b)Included in Current Liabilities — Other and Other Liabilities — Other on DTE Electric's Consolidated Statements of Financial Position.
(c)Includes debt due within one year, unamortized debt discounts, and issuance costs. Excludes finance lease obligations.
Fair Value of Nuclear Decommissioning Trust Fund Assets
The following table summarizes DTE Electric's fair value of the nuclear decommissioning trust fund assets:
June 30, 2020December 31, 2019
(In millions)
Fermi 2$1,592  $1,650  
Fermi 13  3  
Low-level radioactive waste8  8  
$1,603  $1,661  
Schedule of Realized Gains and Losses and Proceeds from Sale of Securities by Nuclear Decommissioning Trust Funds The following table sets forth DTE Electric's gains and losses and proceeds from the sale of securities by the nuclear decommissioning trust funds:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Realized gains$103  $17  $134  $28  
Realized losses$(76) $(10) $(92) $(17) 
Proceeds from sale of securities$799  $220  $1,238  $396  
Fair Value and Unrealized Gains and Losses for Nuclear Decommissioning Trust Funds
The following table sets forth DTE Electric's fair value and unrealized gains and losses for the nuclear decommissioning trust funds:
June 30, 2020December 31, 2019
Fair
Value		Unrealized
Gains		Unrealized
Losses		Fair
Value		Unrealized
Gains		Unrealized
Losses
(In millions)
Equity securities$973  $262  $(25) $1,046  $396  $(39) 
Fixed income securities509  35  (2) 538  24  (1) 
Private equity and other62  —  —  43  —  —  
Cash equivalents59  —  —  34  —  —  
$1,603  $297  $(27) $1,661  $420  $(40) 
Fair Value of the Fixed Income Securities Held in Nuclear Decommissioning Trust Funds
The following table summarizes the fair value of the fixed income securities held in nuclear decommissioning trust funds by contractual maturity:
June 30, 2020
(In millions)
Due within one year$5  
Due after one through five years90  
Due after five through ten years114  
Due after ten years300  
$509  
Summary of Gains (Losses) Related to the Trust The following table summarizes DTE Energy's gains (losses) related to the trust:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Gains (losses) related to equity securities$16  $4  $(6) $17  
Gains (losses) related to fixed income securities6  3  (3) 7  
$22  $7  $(9) $24  
v3.20.2
Financial and Other Derivative Instruments (Tables)
 6 Months Ended
Jun. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair Value of Derivative Instruments
The following table presents the fair value of derivative instruments for DTE Energy:
June 30, 2020December 31, 2019
Derivative
Assets		Derivative LiabilitiesDerivative
Assets		Derivative Liabilities
(In millions)
Derivatives not designated as hedging instruments
Commodity contracts
Natural gas$250  $(226) $355  $(351) 
Electricity223  (211) 306  (298) 
Environmental & Other227  (202) 113  (121) 
Foreign currency exchange contracts3  (1) 1  —  
Total derivatives not designated as hedging instruments$703  $(640) $775  $(770) 
Current$531  $(478) $646  $(596) 
Noncurrent172  (162) 129  (174) 
Total derivatives$703  $(640) $775  $(770) 
The following table presents the fair value of derivative instruments for DTE Electric:
June 30, 2020December 31, 2019
(In millions)
FTRs — Other current assets$10  $3  
Total derivatives not designated as hedging instruments$10  $3  
Netting Offsets of Derivative Assets
The following table presents net cash collateral offsetting arrangements for DTE Energy:
June 30, 2020December 31, 2019
(In millions)
Cash collateral recorded in Accounts receivable(a)
$15  $13  
Cash collateral recorded in Accounts payable(a)
(3) (3) 
Total net cash collateral posted (received)$12  $10  
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
June 30, 2020December 31, 2019
Gross Amounts of Recognized Assets (Liabilities)Gross Amounts Offset in the Consolidated Statements of Financial PositionNet Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial PositionGross Amounts of Recognized Assets (Liabilities)Gross Amounts Offset in the Consolidated Statements of Financial PositionNet Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
(In millions)
Derivative assets
Commodity contracts
Natural gas$250  $(173) $77  $355  $(266) $89  
Electricity223  (165) 58  306  (225) 81  
Environmental & Other227  (217) 10  113  (110) 3  
Foreign currency exchange contracts3  —  3  1  —  1  
Total derivative assets$703  $(555) $148  $775  $(601) $174  
Derivative liabilities
Commodity contracts
Natural gas$(226) $173  $(53) $(351) $266  $(85) 
Electricity(211) 165  (46) (298) 225  (73) 
Environmental & Other(202) 217  15  (121) 110  (11) 
Foreign currency exchange contracts(1) —  (1) —  —  —  
Total derivative liabilities$(640) $555  $(85) $(770) $601  $(169) 
Netting Offsets of Derivative Liabilities
The following table presents net cash collateral offsetting arrangements for DTE Energy:
June 30, 2020December 31, 2019
(In millions)
Cash collateral recorded in Accounts receivable(a)
$15  $13  
Cash collateral recorded in Accounts payable(a)
(3) (3) 
Total net cash collateral posted (received)$12  $10  
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
June 30, 2020December 31, 2019
Gross Amounts of Recognized Assets (Liabilities)Gross Amounts Offset in the Consolidated Statements of Financial PositionNet Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial PositionGross Amounts of Recognized Assets (Liabilities)Gross Amounts Offset in the Consolidated Statements of Financial PositionNet Amounts of Assets (Liabilities) Presented in the Consolidated Statements of Financial Position
(In millions)
Derivative assets
Commodity contracts
Natural gas$250  $(173) $77  $355  $(266) $89  
Electricity223  (165) 58  306  (225) 81  
Environmental & Other227  (217) 10  113  (110) 3  
Foreign currency exchange contracts3  —  3  1  —  1  
Total derivative assets$703  $(555) $148  $775  $(601) $174  
Derivative liabilities
Commodity contracts
Natural gas$(226) $173  $(53) $(351) $266  $(85) 
Electricity(211) 165  (46) (298) 225  (73) 
Environmental & Other(202) 217  15  (121) 110  (11) 
Foreign currency exchange contracts(1) —  (1) —  —  —  
Total derivative liabilities$(640) $555  $(85) $(770) $601  $(169) 
Netting Offsets of Derivative Assets and Liabilities Reconciliation to the Statements of Financial Position
The following table presents the netting offsets of Derivative assets and liabilities showing the reconciliation of derivative instruments to DTE Energy's Consolidated Statements of Financial Position:
June 30, 2020December 31, 2019
Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
CurrentNoncurrentCurrentNoncurrentCurrentNoncurrentCurrentNoncurrent
(In millions)
Total fair value of derivatives$531  $172  $(478) $(162) $646  $129  $(596) $(174) 
Counterparty netting(426) (129) 426  129  (513) (88) 513  88  
Total derivatives as reported$105  $43  $(52) $(33) $133  $41  $(83) $(86) 
Gain (Loss) Recognized in Income on Derivatives
The effect of derivatives not designated as hedging instruments on DTE Energy's Consolidated Statements of Operations is as follows:
Location of Gain (Loss) Recognized in Income on DerivativesGain (Loss) Recognized in Income on Derivatives for the Three Months Ended June 30,Gain (Loss) Recognized in Income on Derivatives for the Six Months Ended June 30,
2020201920202019
(In millions)
Commodity contracts
Natural gasOperating Revenues — Non-utility operations$(25) $24  $(36) $9  
Natural gasFuel, purchased power, and gas — non-utility43  (30) 79  40  
ElectricityOperating Revenues — Non-utility operations41  16  42  (33) 
Environmental & OtherOperating Revenues — Non-utility operations(63) (1) (41) —  
Foreign currency exchange contractsOperating Revenues — Non-utility operations(3) (2) 2  (3) 
Total$(7) $7  $46  $13  
Volume of Commodity Contracts
The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of June 30, 2020:
CommodityNumber of Units
Natural gas (MMBtu)1,653,522,670  
Electricity (MWh)33,708,087  
Foreign currency exchange (CAD)181,720,213  
Renewable Energy Certificates (MWh)9,495,615  
Carbon emissions (Metric Ton)14,170,710  
v3.20.2
Long-Term Debt (Tables)
 6 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Schedule of Issued Debt
In 2020, the following debt was issued:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricFebruary
Mortgage Bonds(a)
2.25%2030$600  
DTE ElectricFebruary
Mortgage Bonds(a)
2.95%2050500  
DTE ElectricApril
Mortgage Bonds(b)
2.63%2031600  
$1,700  
_______________________________________
(a)Proceeds used for the repayment of $300 million of DTE Electric's 2010 Series A 4.89% Senior Notes due 2020, repayment of short-term borrowings, capital expenditures, and for other general corporate purposes.
(b)Proceeds used for the repayment of $300 million of DTE Electric's 2010 Series B 3.45% Senior Notes due 2020, repayment of $32 million of DTE Electric's 2008 Series KT Variable Rate Senior Notes due 2020, repayment of short-term borrowings, capital expenditures, and for other general corporate purposes.
Schedule of Debt Redeemed
In 2020, the following debt was redeemed:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricMarchSenior Notes4.89%2020$300  
v3.20.2
Short-Term Credit Arrangements and Borrowings (Tables)
 6 Months Ended
Jun. 30, 2020
Short-term Debt [Abstract]  
Schedule of Line of Credit Facilities
The availability under these facilities as of June 30, 2020 is shown in the following table:
DTE EnergyDTE ElectricDTE GasTotal
(In millions)
Unsecured letter of credit facility, expiring in February 2021$150  $—  $—  $150  
Unsecured letter of credit facility, expiring in August 2021110  —  —  110  
Unsecured term loan, expiring in March 2021500  —  —  500  
Unsecured term loans, expiring in April 2021—  400  100  500  
Unsecured term loan, expiring in June 2021167  —  —  167  
Unsecured Canadian revolving credit facility, expiring May 202381  —  —  81  
Unsecured revolving credit facility, expiring April 20241,500  500  300  2,300  
2,508  900  400  3,808  
Amounts outstanding at June 30, 2020
Letters of credit201  —  —  201  
Unsecured term loan500  200  100  800  
Revolver borrowings114  —  —  114  
815  200  100  1,115  
Net availability at June 30, 2020$1,693  $700  $300  $2,693  
v3.20.2
Leases (Tables)
 6 Months Ended
Jun. 30, 2020
Leases [Abstract]  
Components of Net Investment in Finance Leases
The components of DTE Energy’s net investment in finance leases for remaining periods were as follows:
DTE Energy
June 30, 2020
(In millions)
2020$14  
202124  
202220  
202319  
202419  
2025 and Thereafter273  
Total minimum future lease receipts369  
Residual value of leased pipeline19  
Less unearned income205  
Net investment in finance lease183  
Less current portion11  
$172  
Schedule of Lease Income Associated with Operating Leases
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Fixed payments$17  $17  $33  $34  
Variable payments16  25  39  52  
$33  $42  $72  $86  
v3.20.2
Retirement Benefits and Trusteed Assets (Tables)
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Schedule of Net Periodic Benefit Costs (Credits)
The following tables detail the components of net periodic benefit costs (credits) for pension benefits and other postretirement benefits for DTE Energy:
Pension BenefitsOther Postretirement Benefits
Three Months Ended June 30,
2020201920202019
(In millions)
Service cost$24  $21  $7  $6  
Interest cost47  54  14  17  
Expected return on plan assets(83) (81) (32) (31) 
Amortization of:
Net actuarial loss43  34  3  3  
Prior service credit—  —  (5) (2) 
Net periodic benefit cost (credit)$31  $28  $(13) $(7) 
Pension BenefitsOther Postretirement Benefits
Six Months Ended June 30,
2020201920202019
(In millions)
Service cost$49  $42  $13  $11  
Interest cost93  109  28  35  
Expected return on plan assets(166) (162) (64) (62) 
Amortization of:
Net actuarial loss86  66  8  6  
Prior service credit—  —  (10) (4) 
Net periodic benefit cost (credit)$62  $55  $(25) $(14) 
The following tables detail the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)(In millions)
Service cost$5  $4  $10  $8  
Interest cost10  14  21  27  
Expected return on plan assets(22) (21) (44) (42) 
Amortization of:
Net actuarial loss3  1  6  2  
Prior service credit(3) (3) (7) (4) 
Net periodic benefit credit$(7) $(5) $(14) $(9) 
v3.20.2
Segment and Related Information (Tables)
 6 Months Ended
Jun. 30, 2020
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
Inter-segment billing for goods and services exchanged between segments is based upon tariffed or market-based prices of the provider and primarily consists of the sale of reduced emissions fuel, power sales, and natural gas sales in the following segments:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Electric$15  $13  $30  $27  
Gas4  3  8  5  
Gas Storage and Pipelines5  3  9  6  
Power and Industrial Projects80  157  174  302  
Energy Trading8  5  14  12  
Corporate and Other—  —  1  1  
$112  $181  $236  $353  
Financial data of DTE Energy's business segments follows:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
Electric$1,309  $1,190  $2,521  $2,425  
Gas251  243  791  888  
Operating Revenues — Non-utility operations
Electric3  —  7  —  
Gas Storage and Pipelines172  121  342  237  
Power and Industrial Projects219  402  526  790  
Energy Trading740  1,113  1,653  2,414  
Corporate and Other1  —  1  1  
Reconciliation and Eliminations(112) (181) (236) (353) 
Total$2,583  $2,888  $5,605  $6,402  
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Net Income (Loss) Attributable to DTE Energy by Segment:
Electric$183  $133  $277  $280  
Gas1  8  122  159  
Gas Storage and Pipelines70  50  142  98  
Power and Industrial Projects25  29  55  55  
Energy Trading(1) (6) 33  26  
Corporate and Other(1) (32) (12) (35) 
Net Income Attributable to DTE Energy Company$277  $182  $617  $583  
v3.20.2
Related Party Transactions (Tables)
 6 Months Ended
Jun. 30, 2020
Related Party Transactions [Abstract]  
Schedule of Related Party Transactions
The following table summarizes the amounts resulting from these transactions included in the Consolidated Statements of Operations:
Three Months Ended June 30,Six Months Ended June 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
DTE Gas$8  $8  $16  $16  
Fuel, purchased power, and gas — utility
DTE Electric$2  $2  $4  $4  
DTE Gas$6  $6  $12  $13  
Fuel, purchased power, and gas — non-utility
DTE Energy Trading$6  $1  $13  $3  
v3.20.2
Organization and Basis of Presentation (Details Textuals)
customer in Millions
Jun. 30, 2020
USD ($)
customer
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Number of electric utility customers | customer 2.2
Number of gas utility customers | customer 1.3
Significant potential exposure | $ $ 0
DTE Electric  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Significant potential exposure | $ $ 0
NEXUS pipeline  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Ownership interest 50.00%
SGG | Midstream Natural Gas Assets  
Error Corrections and Prior Period Adjustments Restatement [Line Items]  
Percent of assets acquired 85.00%
v3.20.2
Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($)
$ in Millions
 6 Months Ended 8 Months Ended
Jun. 30, 2020
Dec. 31, 2019
ASSETS    
Cash and cash equivalents $ 579 $ 93
Accounts receivable 1,375 1,642
Property, plant, and equipment, net 26,724 25,317
Goodwill 2,465 2,464
Total Assets 43,739 41,882
LIABILITIES    
Short term borrowings 914 828
Total    
ASSETS    
Cash and cash equivalents 42 27
Accounts receivable 32 27
Inventories 98 74
Property, plant, and equipment, net 434 443
Goodwill 25 25
Intangible assets 535 542
Other current and long-term assets 8 2
Total Assets 1,174 1,140
LIABILITIES    
Accounts payable and accrued current liabilities 13 15
Short term borrowings 14 0
Other current and long-term liabilities 14 14
Total liabilities 41 29
SGG    
ASSETS    
Cash and cash equivalents 26 16
Accounts receivable 8 8
Inventories 0 0
Property, plant, and equipment, net 406 410
Goodwill 25 25
Intangible assets 535 542
Other current and long-term assets 0 2
Total Assets 1,000 1,003
LIABILITIES    
Accounts payable and accrued current liabilities 0 2
Short term borrowings 0 0
Other current and long-term liabilities 7 7
Total liabilities $ 7 $ 9
VIE ownership and non-ownership percentage 100.00%  
VIE ownership percentage 85.00% 85.00%
Other    
ASSETS    
Cash and cash equivalents $ 16 $ 11
Accounts receivable 24 19
Inventories 98 74
Property, plant, and equipment, net 28 33
Goodwill 0 0
Intangible assets 0 0
Other current and long-term assets 8 0
Total Assets 174 137
LIABILITIES    
Accounts payable and accrued current liabilities 13 13
Short term borrowings 14 0
Other current and long-term liabilities 7 7
Total liabilities $ 34 $ 20
v3.20.2
Organization and Basis of Presentation (Non-Consolidated Variable Interest Entities) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Variable Interest Entity [Line Items]    
Investments in equity method investees $ 1,855 $ 1,862
Notes receivable 228 202
Variable interest entity, non-consolidated    
Variable Interest Entity [Line Items]    
Investments in equity method investees 1,500 1,503
Notes receivable 34 21
Future funding commitments $ 32 $ 63
v3.20.2
Significant Accounting Policies (Other Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Schedule of Other Nonoperating Income, by Component [Line Items]        
Equity earnings of equity method investees $ 30 $ 20 $ 59 $ 43
Income from REF entities 29 29 52 56
Gains from equity and fixed income securities 22 7 22 24
Allowance for equity funds used during construction 7 6 13 13
Contract services 6 6 13 14
Other 7 5 7 11
Total other income 101 73 166 161
DTE Electric        
Schedule of Other Nonoperating Income, by Component [Line Items]        
Gains from equity and fixed income securities 22 7 22 24
Allowance for equity funds used during construction 6 6 12 12
Contract services 6 8 13 16
Other 3 4 3 6
Total other income $ 37 $ 25 $ 50 $ 58
v3.20.2
Significant Accounting Policies (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 4 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Mar. 31, 2020
Mar. 31, 2019
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects $ 11,892 $ 10,569 $ 11,892 $ 11,892 $ 10,569 $ 11,836 $ 10,717 $ 11,988 $ 11,020
Implementation of ASU           us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccountingStandardsUpdate201802Member    
Effective tax rate increase (decrease) (9.00%)     (3.00%)          
Carryback of 2018 net operating loss due to the CARES Act 12.00%     5.00%          
Amortization of TCJA regulatory liability 2.00%     2.00%          
Annual production tax credits 4.00%     3.00%          
Unrecognized tax benefits $ 8   8 $ 8          
Unrecognized compensation cost 99   99 $ 99          
Recognition period (in years)       1 year 7 months 28 days          
Uncollectible expense 15 24   $ 48 53        
CARES Act                  
Significant Accounting Policies [Line Items]                  
Reduction in Income Tax Expense due to carryback of 2018 net operating loss to 2013 34     34          
Claim for employee retention credits     6            
Deferral of employer payroll taxes     14            
CARES Act, AMT Credit Refund                  
Significant Accounting Policies [Line Items]                  
AMT credit receivable recorded in anticipation of refund from U.S. Treasury 220   220 220          
Immediate Refund of 2018 Remaining AMT Credit Balance                  
Significant Accounting Policies [Line Items]                  
AMT credit receivable recorded in anticipation of refund from U.S. Treasury 153   153 153          
Immediate Refund of AMT Credit Generated by Carrying Back 2018 Net Operating Loss to 2013                  
Significant Accounting Policies [Line Items]                  
AMT credit receivable recorded in anticipation of refund from U.S. Treasury $ 67   67 $ 67          
Minimum                  
Significant Accounting Policies [Line Items]                  
Notes receivable considered delinquent period       60 days          
Maximum                  
Significant Accounting Policies [Line Items]                  
Notes receivable considered delinquent period       120 days          
Unbilled Revenues                  
Significant Accounting Policies [Line Items]                  
Specific review of probable future collections based on receivable balances in excess of 90 days       30 days          
DTE Electric and DTE Gas                  
Significant Accounting Policies [Line Items]                  
Receivables due date       21 days          
Threshold period past due for write-off of trade accounts receivable       150 days          
DTE Electric                  
Significant Accounting Policies [Line Items]                  
Effective tax rate increase (decrease) (4.00%)     (4.00%)          
Amortization of TCJA regulatory liability 3.00%     3.00%          
Annual production tax credits 1.00%     1.00%          
Unrecognized tax benefits $ 10   10 $ 10          
Uncollectible expense 9 14   26 30        
DTE Electric | COVID-19 Pandemic                  
Significant Accounting Policies [Line Items]                  
Increase to allowance for doubtful accounts       8          
Amount deferred as a Regulatory Asset 6   6 6          
DTE Electric | CARES Act                  
Significant Accounting Policies [Line Items]                  
Claim for employee retention credits     3            
Deferral of employer payroll taxes     8            
DTE Electric | DTE Energy                  
Significant Accounting Policies [Line Items]                  
Income tax receivable 1   1 1   $ 14      
Allocated costs 7 11   16 24        
DTE Gas | COVID-19 Pandemic                  
Significant Accounting Policies [Line Items]                  
Increase to allowance for doubtful accounts       3          
Amount deferred as a Regulatory Asset 2   2 2          
Accumulated Other Comprehensive Income (Loss)                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects (141) (146) (141) (141) (146) (148) $ (120) (145) (143)
Retained Earnings                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects $ 6,618 $ 6,198 $ 6,618 $ 6,618 $ 6,198 $ 6,587 6,112 $ 6,732 $ 6,364
Implementation of ASU                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects             0    
Implementation of ASU | Accumulated Other Comprehensive Income (Loss)                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects             (25)    
Implementation of ASU | Retained Earnings                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects             25    
ASU No. 2018-02 | Implementation of ASU | Accumulated Other Comprehensive Income (Loss)                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects             (25)    
ASU No. 2018-02 | Implementation of ASU | Retained Earnings                  
Significant Accounting Policies [Line Items]                  
Reclassification of income tax effects             $ 25    
v3.20.2
Significant Accounting Policies (Income Taxes) (Details)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Schedule of Income Taxes [Line Items]        
Effective Tax Rate 2.00% 11.00% 8.00% 11.00%
DTE Electric        
Schedule of Income Taxes [Line Items]        
Effective Tax Rate 12.00% 16.00% 12.00% 16.00%
v3.20.2
Significant Accounting Policies (Financing Receivables Classified by Internal Grade of Credit Risk) (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Notes receivable  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 $ 40
2019 22
2018 and prior 16
Total 78
Notes receivable | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 2
2019 9
2018 and prior 9
Total 20
Notes receivable | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 38
2019 13
2018 and prior 7
Total 58
Net investment in leases  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 140
2019 0
2018 and prior 43
Total 183
Net investment in leases | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 8
2019 0
2018 and prior 42
Total 50
Net investment in leases | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 132
2019 0
2018 and prior 1
Total 133
DTE Electric | Notes receivable  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 11
DTE Electric | Notes receivable | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 11
DTE Electric | Notes receivable | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 0
DTE Electric | Net investment in leases  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 0
DTE Electric | Net investment in leases | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 0
DTE Electric | Net investment in leases | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total $ 0
v3.20.2
Significant Accounting Policies (Roll-Forward of Activity for Financing Receivables Credit Loss Reserves) (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance $ 91
Current period provision 56
Write-offs charged against allowance (91)
Recoveries of amounts previously written off 28
Ending balance 84
Trade accounts receivable  
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 87
Current period provision 54
Write-offs charged against allowance (89)
Recoveries of amounts previously written off 29
Ending balance 81
Other receivables  
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 4
Current period provision 2
Write-offs charged against allowance (2)
Recoveries of amounts previously written off (1)
Ending balance 3
DTE Electric  
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 46
Current period provision 32
Write-offs charged against allowance (51)
Recoveries of amounts previously written off 17
Ending balance $ 44
v3.20.2
Acquisitions (Details Textuals)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended
Jul. 27, 2020
USD ($)
installment
Feb. 18, 2020
USD ($)
MW
Dec. 04, 2019
USD ($)
Sep. 12, 2019
USD ($)
MW
Jan. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Jun. 30, 2020
USD ($)
Jun. 30, 2019
USD ($)
Business Acquisition [Line Items]                        
Consideration paid for entity acquired, paid in cash                     $ 126 $ 0
Liability for contingent consideration payment           $ 379 $ 384       384  
Goodwill           2,464 2,465       2,465  
Operating Revenues — Non-utility operations             1,041   $ 1,471   2,330 3,121
Net Income             277 $ 342 $ 179 $ 408 619 $ 587
Power and Industrial Projects | South Jersey Industries, Combined Heat and Power Generation Facility                        
Business Acquisition [Line Items]                        
Amount of power associated with purchase of renewable energy project | MW   8                    
Consideration paid for entity acquired, paid in cash   $ 95                    
Power and Industrial Projects | South Jersey Industries, Combined Heat and Power Generation Facility | Contract intangibles                        
Business Acquisition [Line Items]                        
Intangible assets, amortization period   13 years                    
Intangible assets recorded as a result of acquisition   $ 17                    
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation                        
Business Acquisition [Line Items]                        
Amount of power associated with purchase of renewable energy project | MW       89                
Total consideration provided for acquired entity       $ 175                
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation | Contract intangibles                        
Business Acquisition [Line Items]                        
Intangible assets recorded as a result of acquisition       $ 109                
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation | Contract intangibles | Minimum                        
Business Acquisition [Line Items]                        
Intangible assets, amortization period       11 years                
Electric | Heritage Sustainable Energy, Renewable Energy Project | DTE Sustainable Generation | Contract intangibles | Maximum                        
Business Acquisition [Line Items]                        
Intangible assets, amortization period       13 years                
Electric | Heritage Sustainable Energy, Additional Renewable Energy Project | DTE Sustainable Generation                        
Business Acquisition [Line Items]                        
Consideration paid for entity acquired, paid in cash         $ 33              
Gas Storage and Pipelines | Blue Union and LEAP                        
Business Acquisition [Line Items]                        
Consideration paid for entity acquired, paid in cash     $ 2,360                  
Total consideration provided for acquired entity     $ 2,740                  
Percent of assets acquired     100.00%                  
Contingent consideration to be paid upon completion     $ 380                  
Liability for contingent consideration payment             384       384  
Accretion expense related to liability for contingent consideration payment             2       4  
Remaining cash consideration paid and held in escrow     99                  
Goodwill     $ 172       $ 172       172  
Goodwill, working capital adjustments                     $ 1  
Direct transaction costs incurred           18            
Issuance costs related to acquisition financing           49            
Operating Revenues — Non-utility operations           15            
Net Income           3            
Gas Storage and Pipelines | Blue Union and LEAP | Subsequent Event                        
Business Acquisition [Line Items]                        
Payment of consideration upon achievement of final milestone $ 385                      
Number of equal payment installments made upon achievement of final milestone | installment 2                      
Gas Storage and Pipelines | Blue Union and LEAP | Mortgage bonds, notes, and other                        
Business Acquisition [Line Items]                        
Issuance costs related to acquisition financing           10            
Gas Storage and Pipelines | Blue Union and LEAP | Common Stock                        
Business Acquisition [Line Items]                        
Issuance costs related to acquisition financing           $ 39            
Gas Storage and Pipelines | Blue Union and LEAP | Customer relationships                        
Business Acquisition [Line Items]                        
Intangible assets, amortization period     40 years                  
Intangible assets recorded as a result of acquisition     $ 1,473                  
Existing intangible asset weighted-average amortization life     13 years                  
v3.20.2
Acquisitions (Purchase Price Allocation - Power and Industrial Segment Acquisition) (Details) - Power and Industrial Projects - South Jersey Industries, Combined Heat and Power Generation Facility
$ in Millions
Feb. 18, 2020
USD ($)
Business Acquisition [Line Items]  
Property, plant, and equipment, net $ 76
Working capital 2
Total 95
Contract intangibles  
Business Acquisition [Line Items]  
Contract intangibles $ 17
v3.20.2
Acquisitions (Purchase Price Allocation - Electric Segment Acquisition) (Details) - DTE Sustainable Generation - Electric - Heritage Sustainable Energy, Renewable Energy Project
$ in Millions
Sep. 12, 2019
USD ($)
Business Acquisition [Line Items]  
Property, plant, and equipment, net $ 60
Working capital 6
Total 175
Contract intangibles  
Business Acquisition [Line Items]  
Contract intangibles $ 109
v3.20.2
Acquisitions (Purchase Price Allocation - Gas Storage and Pipelines Segment Acquisition) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Dec. 04, 2019
Assets      
Goodwill $ 2,465 $ 2,464  
Gas Storage and Pipelines | Blue Union and LEAP      
Assets      
Cash     $ 62
Accounts receivable     31
Property, plant, and equipment, net     1,035
Goodwill $ 172   172
Other current assets     1
Total assets     2,774
Liabilities      
Accounts payable     26
Acquisition related deferred payment     380
Other current liabilities     2
Asset retirement obligations     9
Total liabilities     417
Total cash consideration     2,357
Gas Storage and Pipelines | Customer relationships | Blue Union and LEAP      
Assets      
Customer relationship intangibles     $ 1,473
v3.20.2
Revenue (Disaggregation of Revenue) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Disaggregation of Revenue [Line Items]        
Revenues $ 2,583 $ 2,888 $ 5,605 $ 6,402
Lease revenue outside scope of Topic 606 33 42 72 86
Electric        
Disaggregation of Revenue [Line Items]        
Revenues 1,312 1,190 2,528 2,425
Other revenues outside scope of topic 606 5 5 10 8
Electric | Residential        
Disaggregation of Revenue [Line Items]        
Revenues 671 494 1,269 1,047
Electric | Commercial        
Disaggregation of Revenue [Line Items]        
Revenues 389 423 815 843
Electric | Industrial        
Disaggregation of Revenue [Line Items]        
Revenues 120 158 276 322
Electric | Other        
Disaggregation of Revenue [Line Items]        
Revenues 132 115 168 213
Electric | Other | DTE Sustainable Generation        
Disaggregation of Revenue [Line Items]        
Revenues 3   7  
Gas        
Disaggregation of Revenue [Line Items]        
Revenues 251 243 791 888
Other revenues outside scope of topic 606 3 2 5 4
Alternative Revenue Program revenues outside scope of Topic 606     2 3
Gas | Other        
Disaggregation of Revenue [Line Items]        
Revenues 23 23 66 85
Gas | Gas sales        
Disaggregation of Revenue [Line Items]        
Revenues 169 163 563 640
Gas | End User Transportation        
Disaggregation of Revenue [Line Items]        
Revenues 43 42 120 122
Gas | Intermediate Transportation        
Disaggregation of Revenue [Line Items]        
Revenues 16 15 42 41
Gas Storage and Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues 172 121 342 237
Lease revenue outside scope of Topic 606 2 2 4 4
Power and Industrial Projects        
Disaggregation of Revenue [Line Items]        
Revenues 219 402 526 790
Lease revenue outside scope of Topic 606 21 30 48 61
Energy Trading        
Disaggregation of Revenue [Line Items]        
Revenues 740 1,113 1,653 2,414
Gain (loss) on derivative outside scope of Topic 606 $ 467 $ 879 $ 1,100 $ 1,800
v3.20.2
Revenue (Deferred Revenue) (Details)
$ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
Contract Liability [Roll Forward]  
Beginning Balance $ 75
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period 34
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (12)
Ending Balance $ 97
v3.20.2
Revenue (Expected Recognition of Deferred Revenue) (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 97
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 53
Remaining performance obligation, expected timing of satisfaction 6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 16
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 3
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 11
Remaining performance obligation, expected timing of satisfaction
v3.20.2
Revenue (Expected Timing of Performance Obligation Satisfaction) (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 97
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 53
Remaining performance obligation, expected timing of satisfaction 6 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 16
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 3
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 11
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 1,711
Fixed-price Contract | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation 34
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 122
Remaining performance obligation, expected timing of satisfaction 6 months
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 4
Remaining performance obligation, expected timing of satisfaction 6 months
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 349
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 8
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 291
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 228
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 143
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 1 year
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 578
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 1
Remaining performance obligation, expected timing of satisfaction
v3.20.2
Regulatory Matters (Details Textuals) - MPSC - USD ($)
$ in Millions
Jul. 17, 2020
May 08, 2020
Nov. 25, 2019
Jul. 08, 2019
Jul. 09, 2020
DTE Electric | 2019 Electric Rate Case Filing          
Public Utilities, General Disclosures [Line Items]          
Requested rate increase       $ 351  
Return on equity percent   9.90%   10.00%  
Return on equity requested percent       10.50%  
Approved rate increase   $ 188      
Disallowed cost, capital expenditures related to incentive compensation   41      
DTE Electric | 2019 Electric Rate Case Filing | Subsequent Event          
Public Utilities, General Disclosures [Line Items]          
Regulatory liability for non-plant-related accumulated deferred income tax balances that resulted from the TCJA, accelerated amortization approved         $ 102
DTE Gas | 2019 Gas Rate Case Filing          
Public Utilities, General Disclosures [Line Items]          
Requested rate increase     $ 204    
Return on equity percent     10.00%    
Return on equity requested percent     10.50%    
Disallowed cost, capital expenditures related to incentive compensation   $ 14      
DTE Gas | 2019 Gas Rate Case Filing | Subsequent Event          
Public Utilities, General Disclosures [Line Items]          
Return on equity percent 9.90%        
Approved rate increase $ 110        
Regulatory liability for non-plant-related accumulated deferred income tax balances that resulted from the TCJA, accelerated amortization approved 20        
Net increase to customers due to rate increase $ 51        
v3.20.2
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Basic Earnings per Share        
Net Income Attributable to DTE Energy Company $ 277 $ 182 $ 617 $ 583
Less: Allocation of earnings to net restricted stock awards 0 0 1 1
Net income available to common shareholders — basic $ 277 $ 182 $ 616 $ 582
Average number of common shares outstanding — basic (in shares) 192.0 183.0 192.0 183.0
Basic Earnings per Common Share (in dollars per share) $ 1.44 $ 0.99 $ 3.20 $ 3.19
Diluted Earnings per Share        
Net Income Attributable to DTE Energy Company $ 277 $ 182 $ 617 $ 583
Less: Allocation of earnings to net restricted stock awards 0 0 1 1
Net income available to common shareholders — diluted $ 277 $ 182 $ 616 $ 582
Average number of common shares outstanding — basic (in shares) 192.0 183.0 192.0 183.0
Incremental shares attributable to:        
Average dilutive equity units, performance share awards, and stock options (in shares) 1.0 1.0 0.0 0.0
Average number of common shares outstanding — diluted (in shares) 193.0 184.0 192.0 183.0
Diluted Earnings per Common Share (in dollars per share) $ 1.44 $ 0.99 $ 3.20 $ 3.18
Antidilutive securities excluded from computation of earnings per share (in shares) 10.3   10.3  
v3.20.2
Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Derivative assets    
Derivative assets, gross $ 703 $ 775
Derivative asset, netting (555) (601)
Derivative assets, net 148 174
Derivative liabilities    
Derivative liabilities, gross (640) (770)
Derivative liability, netting 555 601
Derivative liabilities, net (85) (169)
Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (478) (596)
Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (162) (174)
Natural gas    
Derivative assets    
Derivative assets, gross 250 355
Derivative asset, netting (173) (266)
Derivative assets, net 77 89
Derivative liabilities    
Derivative liabilities, gross (226) (351)
Derivative liability, netting 173 266
Derivative liabilities, net (53) (85)
Electricity    
Derivative assets    
Derivative assets, gross 223 306
Derivative asset, netting (165) (225)
Derivative assets, net 58 81
Derivative liabilities    
Derivative liabilities, gross (211) (298)
Derivative liability, netting 165 225
Derivative liabilities, net (46) (73)
Environmental & Other    
Derivative assets    
Derivative assets, gross 227 113
Derivative asset, netting (217) (110)
Derivative assets, net 10 3
Derivative liabilities    
Derivative liabilities, gross (202) (121)
Derivative liability, netting 217 110
Derivative liabilities, net 15 (11)
Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 3 1
Derivative asset, netting 0 0
Derivative assets, net 3 1
Derivative liabilities    
Derivative liabilities, gross (1) 0
Derivative liability, netting 0 0
Derivative liabilities, net (1) 0
Recurring    
Assets    
Cash equivalents 331 15
Derivative assets    
Derivative asset, netting (555) (601)
Derivative assets, net 148 174
Total assets 2,307 2,073
Derivative liabilities    
Derivative liability, netting 555 601
Derivative liabilities, net (85) (169)
Net Assets at end of period 2,222 1,904
Net Assets at end of period, netting 0 0
Recurring | DTE Electric    
Assets    
Cash equivalents 205 11
Derivative assets    
Total assets 1,842 1,688
Recurring | Current assets    
Derivative assets    
Derivative asset, netting (426) (513)
Total assets 436 148
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 215 14
Recurring | Noncurrent assets    
Derivative assets    
Derivative asset, netting (129) (88)
Total assets 1,871 1,925
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,627 1,674
Recurring | Current liabilities    
Derivative liabilities    
Derivative liability, netting 426 513
Derivative liabilities, net (52) (83)
Recurring | Noncurrent liabilities    
Derivative liabilities    
Derivative liability, netting 129 88
Derivative liabilities, net (33) (86)
Recurring | Cash and cash equivalents    
Assets    
Cash equivalents 330 4
Recurring | Cash and cash equivalents | DTE Electric    
Assets    
Cash equivalents 205  
Recurring | Restricted cash    
Assets    
Cash equivalents 1  
Recurring | Other    
Assets    
Cash equivalents   11
Recurring | Other | DTE Electric    
Assets    
Cash equivalents   11
Recurring | Natural gas    
Derivative assets    
Derivative asset, netting (173) (266)
Derivative assets, net 77 89
Derivative liabilities    
Derivative liability, netting 173 266
Derivative liabilities, net (53) (85)
Recurring | Electricity    
Derivative assets    
Derivative asset, netting (165) (225)
Derivative assets, net 58 81
Derivative liabilities    
Derivative liability, netting 165 225
Derivative liabilities, net (46) (73)
Recurring | Environmental & Other    
Derivative assets    
Derivative asset, netting (217) (110)
Derivative assets, net 10 3
Derivative liabilities    
Derivative liability, netting 217 110
Derivative liabilities, net 15 (11)
Recurring | Foreign currency exchange contracts    
Derivative assets    
Derivative asset, netting 0 0
Derivative assets, net 3 1
Derivative liabilities    
Derivative liability, netting 0 0
Derivative liabilities, net (1) 0
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 10 3
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 59 34
Other investments 177 4
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 59 34
Other investments 11 0
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 62 43
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 62 43
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 973 1,046
Other investments 42 140
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 973 1,046
Other investments 13 13
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 509 538
Other investments 6 79
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 509 538
Recurring | Level 1    
Assets    
Cash equivalents 331 15
Derivative assets    
Derivative assets, gross 100 205
Total assets 1,825 1,683
Derivative liabilities    
Derivative liabilities, gross (126) (221)
Net Assets at end of period 1,699 1,462
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 205 11
Derivative assets    
Total assets 1,398 1,264
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 425 218
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 205 11
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,400 1,465
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,193 1,253
Recurring | Level 1 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (117) (211)
Recurring | Level 1 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (9) (10)
Recurring | Level 1 | Natural gas    
Derivative assets    
Derivative assets, gross 100 205
Derivative liabilities    
Derivative liabilities, gross (123) (221)
Recurring | Level 1 | Electricity    
Derivative assets    
Derivative assets, gross 0 0
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Environmental & Other    
Derivative assets    
Derivative assets, gross 0 0
Derivative liabilities    
Derivative liabilities, gross (3) 0
Recurring | Level 1 | Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 0 0
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 0 0
Recurring | Level 1 | Cash equivalents    
Assets    
Nuclear decommissioning trusts 59 34
Other investments 177 4
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 59 34
Other investments 11 0
Recurring | Level 1 | Private equity and other    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 1 | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 973 1,046
Other investments 42 140
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 973 1,046
Other investments 13 13
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 137 160
Other investments 6 79
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 137 160
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 454 410
Total assets 826 788
Derivative liabilities    
Derivative liabilities, gross (411) (393)
Net Assets at end of period 415 395
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 372 378
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 329 320
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 497 468
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 372 378
Recurring | Level 2 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (298) (300)
Recurring | Level 2 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (113) (93)
Recurring | Level 2 | Natural gas    
Derivative assets    
Derivative assets, gross 79 76
Derivative liabilities    
Derivative liabilities, gross (52) (41)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 155 223
Derivative liabilities    
Derivative liabilities, gross (159) (231)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 217 110
Derivative liabilities    
Derivative liabilities, gross (199) (121)
Recurring | Level 2 | Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 3 1
Derivative liabilities    
Derivative liabilities, gross (1) 0
Recurring | Level 2 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 0 0
Recurring | Level 2 | Cash equivalents    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 2 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 2 | Private equity and other    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 2 | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 2 | Equity securities    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 2 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 2 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 372 378
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 372 378
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 149 160
Total assets 149 160
Derivative liabilities    
Derivative liabilities, gross (103) (156)
Net Assets at end of period 46 4
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 10 3
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 108 123
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 10 3
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 41 37
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (63) (85)
Recurring | Level 3 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (40) (71)
Recurring | Level 3 | Natural gas    
Derivative assets    
Derivative assets, gross 71 74
Derivative liabilities    
Derivative liabilities, gross (51) (89)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 68 83
Derivative liabilities    
Derivative liabilities, gross (52) (67)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 10 3
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 0 0
Derivative liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 10 3
Recurring | Level 3 | Cash equivalents    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 3 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 3 | Private equity and other    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 3 | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 3 | Equity securities    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 3 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 3 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 0 0
Other investments 0 0
Recurring | Level 3 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Other    
Derivative assets    
Total assets 62 43
Derivative liabilities    
Net Assets at end of period 62 43
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 62 43
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 62 43
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 62 43
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 62 43
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 62 $ 43
v3.20.2
Fair Value (Details Textuals) - Private equity and other - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Unfunded commitments related to investments classified as NAV assets $ 195 $ 151
Minimum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments classified as NAV assets, general contractual durations 7 years  
Maximum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments classified as NAV assets, general contractual durations 12 years  
v3.20.2
Fair Value (Reconciliation of Level 3 Assets and Liabilities at Fair Value on a Recurring Basis) (Details) - Recurring - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period $ 24 $ (33) $ 4 $ (44)
Transfers into Level 3 from Level 2 2 1    
Transfers from Level 3 into Level 2 (5) 0 (4) 0
Total gains (losses)        
Included in earnings 37 40 81 40
Recorded in/Change in fair value recorded in Regulatory liabilities 14 9 12 7
Purchases, issuances, and settlements        
Settlements (26) (8) (47) 6
Net Assets (Liabilities) as of end of period 46 9 46 9
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019 22 33 63 28
DTE Electric        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period 1 2 3 6
Total gains (losses)        
Recorded in/Change in fair value recorded in Regulatory liabilities 14 9 12 7
Purchases, issuances, and settlements        
Settlements (5) (2) (5) (4)
Net Assets (Liabilities) as of end of period 10 9 10 9
The amount of total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets held at June 30, 2020 and 2019 and reflected in DTE Electric's Consolidated Statements of Financial Position 10 9 10 9
Natural gas        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period 8 (10) (15) (49)
Transfers into Level 3 from Level 2 2 1    
Transfers from Level 3 into Level 2 (5) 0 (4) 0
Total gains (losses)        
Included in earnings 12 (1) 36 31
Recorded in/Change in fair value recorded in Regulatory liabilities 0 0 0 0
Purchases, issuances, and settlements        
Settlements 3 0 3 8
Net Assets (Liabilities) as of end of period 20 (10) 20 (10)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019 18 (1) 37 16
Electricity        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period 15 (25) 16 (2)
Transfers into Level 3 from Level 2 0 0    
Transfers from Level 3 into Level 2 0 0 0 0
Total gains (losses)        
Included in earnings 33 41 53 10
Recorded in/Change in fair value recorded in Regulatory liabilities 0 0 0 0
Purchases, issuances, and settlements        
Settlements (32) (6) (53) 2
Net Assets (Liabilities) as of end of period 16 10 16 10
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019 20 38 42 17
Other        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period 1 2 3 7
Transfers into Level 3 from Level 2 0 0    
Transfers from Level 3 into Level 2 0 0 0 0
Total gains (losses)        
Included in earnings (8) 0 (8) (1)
Recorded in/Change in fair value recorded in Regulatory liabilities 14 9 12 7
Purchases, issuances, and settlements        
Settlements 3 (2) 3 (4)
Net Assets (Liabilities) as of end of period 10 9 10 9
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at June 30, 2020 and 2019 $ (16) $ (4) $ (16) $ (5)
v3.20.2
Fair Value (Unobservable Inputs related to Level 3 Assets and Liabilities) (Details)
$ in Millions
Jun. 30, 2020
USD ($)
MMBTU
MWh
Dec. 31, 2019
USD ($)
MWh
MMBTU
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets $ 703 $ 775
Derivative Liabilities (640) (770)
Recurring | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 149 160
Derivative Liabilities (103) (156)
Natural gas    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 250 355
Derivative Liabilities (226) (351)
Natural gas | Recurring | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 71 74
Derivative Liabilities (51) (89)
Electricity    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 223 306
Derivative Liabilities (211) (298)
Electricity | Recurring | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 68 83
Derivative Liabilities $ (52) $ (67)
Forward basis price | Natural gas | Minimum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MMBTU (0.74) (1.78)
Forward basis price | Natural gas | Maximum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MMBTU 4.18 5.78
Forward basis price | Natural gas | Weighted Average | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MMBTU (0.06) (0.09)
Forward basis price | Electricity | Minimum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MWh (10) (10)
Forward basis price | Electricity | Maximum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MWh 14 6
Forward basis price | Electricity | Weighted Average | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MWh (1) 0
v3.20.2
Fair Value (Fair Value of Financial Instruments) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Carrying amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases $ 78 $ 184
Short-term borrowings 914 828
Notes payable — Other 15 25
Long-term debt 17,997 16,606
Carrying amount | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 11 9
Short-term borrowings 200 354
Notes payable — Other 11 21
Long-term debt 8,566 7,180
Carrying amount | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings 107 97
Fair value | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 0 0
Short-term borrowings 0 0
Notes payable — Other 0 0
Long-term debt 2,299 2,572
Fair value | Level 1 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 0 0
Short-term borrowings 0 0
Notes payable — Other 0 0
Long-term debt 0 0
Fair value | Level 1 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings 0 0
Fair value | Level 2    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 0 0
Short-term borrowings 914 828
Notes payable — Other 0 0
Long-term debt 15,952 14,207
Fair value | Level 2 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 0 0
Short-term borrowings 200 354
Notes payable — Other 0 0
Long-term debt 9,821 7,916
Fair value | Level 2 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings 0 0
Fair value | Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 78 184
Short-term borrowings 0 0
Notes payable — Other 15 25
Long-term debt 1,845 1,252
Fair value | Level 3 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other, excluding lessor finance leases 11 9
Short-term borrowings 0 0
Notes payable — Other 11 21
Long-term debt 193 173
Fair value | Level 3 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings $ 107 $ 97
v3.20.2
Fair Value (Fair Value of Nuclear Decommissioning Trust Fund Assets) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds $ 1,603 $ 1,661
DTE Electric    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 1,603 1,661
DTE Electric | Nuclear decommissioning trust fund    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 1,603 1,661
DTE Electric | Nuclear decommissioning trust fund | Fermi 2    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 1,592 1,650
DTE Electric | Nuclear decommissioning trust fund | Fermi 1    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 3 3
DTE Electric | Nuclear decommissioning trust fund | Low-level radioactive waste    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds $ 8 $ 8
v3.20.2
Fair Value (Gains and Losses and Proceeds from the Sale of Securities by the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - Nuclear decommissioning trust fund - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Debt Securities, Available-for-sale [Line Items]        
Realized gains $ 103 $ 17 $ 134 $ 28
Realized losses (76) (10) (92) (17)
Proceeds from sale of securities $ 799 $ 220 $ 1,238 $ 396
v3.20.2
Fair Value (Fair Value and Unrealized Gains and Losses for the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - Nuclear decommissioning trust fund - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Fair Value $ 1,603 $ 1,661
Fixed income securities, fair value 509 538
Private equity and other, fair value 62 43
Cash equivalents, fair value 59 34
Unrealized Gains 297 420
Fixed income securities, unrealized gains 35 24
Unrealized Losses (27) (40)
Fixed income securities, unrealized losses (2) (1)
Equity securities    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 973 1,046
Unrealized Gains 262 396
Unrealized Losses $ (25) $ (39)
v3.20.2
Fair Value (Fair Value of Fixed Income Securities Held in Nuclear Decommissioning Trust Funds (Details) - Fixed income securities - Nuclear decommissioning trust fund
$ in Millions
Jun. 30, 2020
USD ($)
Debt Securities, Available-for-sale [Line Items]  
Due within one year $ 5
Due after one through five years 90
Due after five through ten years 114
Due after ten years 300
Available-for-sale securities total $ 509
v3.20.2
Fair Value (Gains (Losses) Related to the Trust) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Rabbi Trust        
Schedule of Investments [Line Items]        
Gains (losses) related to the Trust $ 22 $ 7 $ (9) $ 24
Equity securities        
Schedule of Investments [Line Items]        
Gains (losses) related to the Trust 16 4 (6) 17
Fixed income securities        
Schedule of Investments [Line Items]        
Gains (losses) related to the Trust $ 6 $ 3 $ (3) $ 7
v3.20.2
Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 703 $ 775
Derivative Liabilities (640) (770)
Current derivative assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 531 646
Current derivative liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (478) (596)
Noncurrent derivative assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 172 129
Noncurrent derivative liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (162) (174)
Natural gas    
Derivatives, Fair Value [Line Items]    
Derivative Assets 250 355
Derivative Liabilities (226) (351)
Electricity    
Derivatives, Fair Value [Line Items]    
Derivative Assets 223 306
Derivative Liabilities (211) (298)
Environmental & Other    
Derivatives, Fair Value [Line Items]    
Derivative Assets 227 113
Derivative Liabilities (202) (121)
Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 3 1
Derivative Liabilities (1) 0
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative Assets 703 775
Derivative Liabilities (640) (770)
Derivatives not designated as hedging instruments | DTE Electric    
Derivatives, Fair Value [Line Items]    
Derivative Assets 10 3
Derivatives not designated as hedging instruments | Natural gas    
Derivatives, Fair Value [Line Items]    
Derivative Assets 250 355
Derivative Liabilities (226) (351)
Derivatives not designated as hedging instruments | Electricity    
Derivatives, Fair Value [Line Items]    
Derivative Assets 223 306
Derivative Liabilities (211) (298)
Derivatives not designated as hedging instruments | Environmental & Other    
Derivatives, Fair Value [Line Items]    
Derivative Assets 227 113
Derivative Liabilities (202) (121)
Derivatives not designated as hedging instruments | Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 3 1
Derivative Liabilities (1) 0
Derivatives not designated as hedging instruments | FTRs — Other current assets | DTE Electric    
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 10 $ 3
v3.20.2
Financial and Other Derivative Instruments (Details Textuals) - USD ($)
Jun. 30, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Letters of credit that could be used to offset net derivative liabilities $ 6,000,000 $ 6,000,000
Letters of credit received that could be used to offset net derivative assets 4,000,000 $ 4,000,000
Contractual obligation to post collateral in event of downgrade to below investment grade 368,000,000  
Derivative net liability position aggregate fair value 577,000,000  
Collateral already posted fair value 0  
Derivative net asset position, fair value 540,000,000  
Remaining amount of offsets to derivative net liability positions for hard and soft trigger provisions $ 37,000,000  
v3.20.2
Financial and Other Derivative Instruments (Net Cash Collateral Offsetting Arrangements) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Cash collateral recorded in Accounts receivable $ 15 $ 13
Cash collateral recorded in Accounts payable (3) (3)
Total net cash collateral posted (received) $ 12 $ 10
v3.20.2
Financial and Other Derivative Instruments (Netting Offsets of Derivative Assets and Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) $ 703 $ 775
Gross Amounts Offset in the Consolidated Statements of Financial Position (555) (601)
Derivative assets, net 148 174
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (640) (770)
Gross Amounts Offset in the Consolidated Statements of Financial Position 555 601
Derivative liabilities, net (85) (169)
Natural gas    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 250 355
Gross Amounts Offset in the Consolidated Statements of Financial Position (173) (266)
Derivative assets, net 77 89
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (226) (351)
Gross Amounts Offset in the Consolidated Statements of Financial Position 173 266
Derivative liabilities, net (53) (85)
Electricity    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 223 306
Gross Amounts Offset in the Consolidated Statements of Financial Position (165) (225)
Derivative assets, net 58 81
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (211) (298)
Gross Amounts Offset in the Consolidated Statements of Financial Position 165 225
Derivative liabilities, net (46) (73)
Environmental & Other    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 227 113
Gross Amounts Offset in the Consolidated Statements of Financial Position (217) (110)
Derivative assets, net 10 3
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (202) (121)
Gross Amounts Offset in the Consolidated Statements of Financial Position 217 110
Derivative liabilities, net 15 (11)
Foreign currency exchange contracts    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 3 1
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Derivative assets, net 3 1
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (1) 0
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Derivative liabilities, net $ (1) $ 0
v3.20.2
Financial and Other Derivative Instruments (Netting Offsets Reconciliation to Balance Sheet) (Details) - USD ($)
$ in Millions
Jun. 30, 2020
Dec. 31, 2019
Derivative Assets    
Derivative Assets $ 703 $ 775
Derivative assets, current 105 133
Derivative assets, noncurrent 43 41
Derivative Liabilities    
Derivative Liabilities (640) (770)
Derivative liabilities, current (52) (83)
Derivative liabilities, noncurrent (33) (86)
Current derivative assets    
Derivative Assets    
Derivative Assets 531 646
Counterparty netting (426) (513)
Derivative assets, current 105 133
Noncurrent derivative assets    
Derivative Assets    
Derivative Assets 172 129
Counterparty netting (129) (88)
Derivative assets, noncurrent 43 41
Current derivative liabilities    
Derivative Liabilities    
Derivative Liabilities (478) (596)
Counterparty netting 426 513
Derivative liabilities, current (52) (83)
Noncurrent derivative liabilities    
Derivative Liabilities    
Derivative Liabilities (162) (174)
Counterparty netting 129 88
Derivative liabilities, noncurrent $ (33) $ (86)
v3.20.2
Financial and Other Derivative Instruments (Effect of Derivatives not Designated as Hedging Instruments on the Consolidated Statement of Operations) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives $ (7) $ 7 $ 46 $ 13
Natural gas | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives (25) 24 (36) 9
Natural gas | Fuel, purchased power, and gas — non-utility        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives 43 (30) 79 40
Electricity | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives 41 16 42 (33)
Environmental & Other | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives (63) (1) (41) 0
Foreign currency exchange contracts | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives $ (3) $ (2) $ 2 $ (3)
v3.20.2
Financial and Other Derivative Instruments (Cumulative Gross Volume of Derivative Contracts Outstanding) (Details)
 6 Months Ended
Jun. 30, 2020
CAD ($)
MMBTU
MWh
T
Natural gas (MMBtu)  
Derivative [Line Items]  
Commodity, energy measures | MMBTU 1,653,522,670
Electricity (MWh)  
Derivative [Line Items]  
Commodity, energy measures 33,708,087
Foreign currency exchange (CAD)  
Derivative [Line Items]  
Commodity, monetary measure | $ $ 181,720,213
Renewable Energy Certificates (MWh)  
Derivative [Line Items]  
Commodity, energy measures 9,495,615
Carbon emissions (Metric Ton)  
Derivative [Line Items]  
Commodity, mass measure | T 14,170,710
v3.20.2
Long-Term Debt (Schedule of Issued Debt) (Details)
 6 Months Ended
Jun. 30, 2020
USD ($)
Debt Instrument [Line Items]  
Debt issued $ 1,700,000,000
DTE Electric | Mortgage Bonds | February 2020 2.25% Mortgage Bonds Maturing 2030  
Debt Instrument [Line Items]  
Interest rate 2.25%
Debt issued $ 600,000,000
DTE Electric | Mortgage Bonds | February 2020 2.95% Mortgage Bonds Maturing 2050  
Debt Instrument [Line Items]  
Interest rate 2.95%
Debt issued $ 500,000,000
DTE Electric | Mortgage Bonds | April 2020 2.63% Mortgage Bonds Maturing 2031  
Debt Instrument [Line Items]  
Interest rate 2.63%
Debt issued $ 600,000,000
DTE Electric | Senior Notes | 4.89% Senior Notes Maturing 2020  
Debt Instrument [Line Items]  
Interest rate 4.89%
Repayment of debt $ 300,000,000
DTE Electric | Senior Notes | 2010 Series B 3.45% Senior Notes Due 2020  
Debt Instrument [Line Items]  
Interest rate 3.45%
Repayment of debt $ 300,000,000
DTE Electric | Senior Notes | 2008 Series KT Variable Rate Senior Notes Due 2020  
Debt Instrument [Line Items]  
Repayment of debt $ 32,000,000
v3.20.2
Long-Term Debt (Details Textuals) - USD ($)
 4 Months Ended 6 Months Ended
Jul. 01, 2020
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2019
Aug. 31, 2020
Mar. 31, 2020
Debt Instrument [Line Items]            
Face amount of loan   $ 1,700,000,000 $ 1,700,000,000      
Amount drawn down on loan     1,685,000,000 $ 1,438,000,000    
DTE Electric            
Debt Instrument [Line Items]            
Amount drawn down on loan     1,685,000,000 $ 643,000,000    
First Mortgage Bonds due September 1, 2030 | DTE Gas | Forecast | Mortgage Bonds            
Debt Instrument [Line Items]            
Face amount of loan         $ 125,000,000  
Interest rate         2.35%  
First Mortgage Bonds due September 1, 2050 | DTE Gas | Forecast | Mortgage Bonds            
Debt Instrument [Line Items]            
Face amount of loan         $ 125,000,000  
Interest rate         3.20%  
2008 Series KT Variable Rate Senior Notes Due 2020 | DTE Electric | Senior Notes            
Debt Instrument [Line Items]            
Debt redeemed     $ 32,000,000      
2008 Series KT Variable Rate Senior Notes Due 2020 | DTE Electric | Subsequent Event | Senior Notes            
Debt Instrument [Line Items]            
Debt redeemed $ 32,000,000          
2010 Series B 3.45% Senior Notes Due 2020 | DTE Electric | Senior Notes            
Debt Instrument [Line Items]            
Interest rate   3.45% 3.45%      
Debt redeemed     $ 300,000,000      
2010 Series B 3.45% Senior Notes Due 2020 | DTE Electric | Subsequent Event | Senior Notes            
Debt Instrument [Line Items]            
Interest rate 3.45%          
Debt redeemed $ 300,000,000          
Unsecured term loan | Unsecured Term Loan Maturing in March 2022            
Debt Instrument [Line Items]            
Face amount of loan           $ 200,000,000
Amount drawn down on loan   $ 0        
v3.20.2
Long-Term Debt (Schedule of Debt Redeemed) (Details) - DTE Electric - Senior Notes - 4.89% Senior Notes Maturing 2020
$ in Millions
 6 Months Ended
Jun. 30, 2020
USD ($)
Debt Instrument, Redemption [Line Items]  
Interest rate 4.89%
Debt redeemed $ 300
v3.20.2
Short-Term Credit Arrangements and Borrowings (Details Textuals)
Jul. 28, 2020
USD ($)
Jun. 30, 2020
USD ($)
May 31, 2020
CAD ($)
Apr. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Short-term Debt [Line Items]            
Face amount of loan   $ 1,700,000,000        
Maximum borrowing capacity   3,808,000,000        
Amounts outstanding   1,115,000,000        
Unsecured term loan            
Short-term Debt [Line Items]            
Amounts outstanding   800,000,000        
Revolving credit facility            
Short-term Debt [Line Items]            
Amounts outstanding   114,000,000        
Letters of credit            
Short-term Debt [Line Items]            
Amounts outstanding   201,000,000        
Unsecured Term Loan, Expiring March 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Face amount of loan         $ 500,000,000  
Amount drawn   500,000,000        
Maximum borrowing capacity   500,000,000        
Unsecured Term Loan, Expiring April 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   500,000,000        
Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility            
Short-term Debt [Line Items]            
Maximum borrowing capacity   81,000,000        
Unsecured Term Loan, Expiring June 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Face amount of loan   167,000,000        
Amount drawn   0        
Maximum borrowing capacity   167,000,000        
DTE Energy            
Short-term Debt [Line Items]            
Maximum borrowing capacity   2,508,000,000        
Amounts outstanding   $ 815,000,000        
Ratio of indebtedness to net capital   0.60        
DTE Energy | Unsecured term loan            
Short-term Debt [Line Items]            
Amounts outstanding   $ 500,000,000        
DTE Energy | Revolving credit facility            
Short-term Debt [Line Items]            
Amounts outstanding   114,000,000        
DTE Energy | Letters of credit            
Short-term Debt [Line Items]            
Amounts outstanding   201,000,000        
DTE Energy | Demand financing agreement            
Short-term Debt [Line Items]            
Maximum borrowing capacity, financing agreement   100,000,000        
Maximum additional margin financing   50,000,000        
Amount outstanding   70,000,000       $ 114,000,000
DTE Energy | Demand financing agreement plus letter of credit            
Short-term Debt [Line Items]            
Maximum borrowing capacity, financing agreement   150,000,000        
DTE Energy | Unsecured Term Loan, Expiring March 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   500,000,000        
DTE Energy | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   0        
DTE Energy | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility            
Short-term Debt [Line Items]            
Maximum borrowing capacity   81,000,000        
DTE Energy | Unsecured Term Loan, Expiring June 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   167,000,000        
DTE Energy | Other outstanding letters of credit | Letters of credit            
Short-term Debt [Line Items]            
Amounts outstanding   $ 9,000,000        
DTE Energy | Uncommitted letter of credit facility, Expiring July 2021 | Letters of credit | Subsequent Event            
Short-term Debt [Line Items]            
Maximum borrowing capacity $ 50,000,000          
Amounts outstanding $ 0          
Maximum            
Short-term Debt [Line Items]            
Ratio of indebtedness to net capital   0.65        
DTE Electric            
Short-term Debt [Line Items]            
Maximum borrowing capacity   $ 900,000,000        
Amounts outstanding   $ 200,000,000        
Ratio of indebtedness to net capital   0.55        
DTE Electric | Unsecured term loan            
Short-term Debt [Line Items]            
Amounts outstanding   $ 200,000,000        
DTE Electric | Revolving credit facility            
Short-term Debt [Line Items]            
Amounts outstanding   0        
DTE Electric | Letters of credit            
Short-term Debt [Line Items]            
Amounts outstanding   0        
DTE Electric | Unsecured Term Loan, Expiring March 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   0        
DTE Electric | Unsecured Term Loan, Expiring April 2021, Funded | Unsecured term loan            
Short-term Debt [Line Items]            
Face amount of loan       $ 200,000,000    
Amount drawn   200,000,000        
DTE Electric | Unsecured Term Loan, Expiring April 2021, Unfunded | Unsecured term loan            
Short-term Debt [Line Items]            
Face amount of loan       200,000,000    
Amount drawn   0        
DTE Electric | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   400,000,000        
DTE Electric | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility            
Short-term Debt [Line Items]            
Maximum borrowing capacity   0        
DTE Electric | Unsecured Term Loan, Expiring June 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   0        
DTE Gas            
Short-term Debt [Line Items]            
Maximum borrowing capacity   400,000,000        
Amounts outstanding   $ 100,000,000        
Ratio of indebtedness to net capital   0.47        
DTE Gas | Unsecured term loan            
Short-term Debt [Line Items]            
Amounts outstanding   $ 100,000,000        
DTE Gas | Revolving credit facility            
Short-term Debt [Line Items]            
Amounts outstanding   0        
DTE Gas | Letters of credit            
Short-term Debt [Line Items]            
Amounts outstanding   0        
DTE Gas | Unsecured Term Loan, Expiring March 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   0        
DTE Gas | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Face amount of loan       100,000,000    
Amount drawn       $ 100,000,000    
Maximum borrowing capacity   100,000,000        
DTE Gas | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility            
Short-term Debt [Line Items]            
Maximum borrowing capacity   0        
DTE Gas | Unsecured Term Loan, Expiring June 2021 | Unsecured term loan            
Short-term Debt [Line Items]            
Maximum borrowing capacity   $ 0        
DTE Lake Erie Generation, Inc | Unsecured Canadian Revolving Credit Facility, Expiring May 2023 | Revolving credit facility            
Short-term Debt [Line Items]            
Maximum borrowing capacity     $ 110,000,000      
Amounts outstanding     $ 19,000,000      
v3.20.2
Short-Term Credit Arrangements and Borrowings (Details)
Jun. 30, 2020
USD ($)
Availability under combined facilities  
Maximum borrowing capacity $ 3,808,000,000
Amounts outstanding 1,115,000,000
Net availability 2,693,000,000
DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 900,000,000
Amounts outstanding 200,000,000
Net availability 700,000,000
DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 400,000,000
Amounts outstanding 100,000,000
Net availability 300,000,000
DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 2,508,000,000
Amounts outstanding 815,000,000
Net availability 1,693,000,000
Letters of credit  
Availability under combined facilities  
Amounts outstanding 201,000,000
Letters of credit | DTE Electric  
Availability under combined facilities  
Amounts outstanding 0
Letters of credit | DTE Gas  
Availability under combined facilities  
Amounts outstanding 0
Letters of credit | DTE Energy  
Availability under combined facilities  
Amounts outstanding 201,000,000
Letters of credit | Unsecured letter of credit facility, expiring in February 2021  
Availability under combined facilities  
Maximum borrowing capacity 150,000,000
Letters of credit | Unsecured letter of credit facility, expiring in February 2021 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring in February 2021 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring in February 2021 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 150,000,000
Letters of credit | Unsecured letter of credit facility, expiring in August 2021  
Availability under combined facilities  
Maximum borrowing capacity 110,000,000
Letters of credit | Unsecured letter of credit facility, expiring in August 2021 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring in August 2021 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring in August 2021 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 110,000,000
Unsecured term loan  
Availability under combined facilities  
Amounts outstanding 800,000,000
Unsecured term loan | DTE Electric  
Availability under combined facilities  
Amounts outstanding 200,000,000
Unsecured term loan | DTE Gas  
Availability under combined facilities  
Amounts outstanding 100,000,000
Unsecured term loan | DTE Energy  
Availability under combined facilities  
Amounts outstanding 500,000,000
Unsecured term loan | Unsecured term loan, expiring in March 2021  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured term loan | Unsecured term loan, expiring in March 2021 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring in March 2021 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring in March 2021 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured term loan | Unsecured term loans, expiring in April 2021  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured term loan | Unsecured term loans, expiring in April 2021 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 400,000,000
Unsecured term loan | Unsecured term loans, expiring in April 2021 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 100,000,000
Unsecured term loan | Unsecured term loans, expiring in April 2021 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring in June 2021  
Availability under combined facilities  
Maximum borrowing capacity 167,000,000
Unsecured term loan | Unsecured term loan, expiring in June 2021 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring in June 2021 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring in June 2021 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 167,000,000
Revolving credit facility  
Availability under combined facilities  
Amounts outstanding 114,000,000
Revolving credit facility | DTE Electric  
Availability under combined facilities  
Amounts outstanding 0
Revolving credit facility | DTE Gas  
Availability under combined facilities  
Amounts outstanding 0
Revolving credit facility | DTE Energy  
Availability under combined facilities  
Amounts outstanding 114,000,000
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023  
Availability under combined facilities  
Maximum borrowing capacity 81,000,000
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 81,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2024  
Availability under combined facilities  
Maximum borrowing capacity 2,300,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2024 | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2024 | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 300,000,000
Revolving credit facility | Unsecured revolving credit facility, expiring April 2024 | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity $ 1,500,000,000
v3.20.2
Leases (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Mar. 31, 2020
Leases [Abstract]          
Finance lease agreement, term (less than) 2 years   2 years    
Net investment in finance lease arrangement $ 8   $ 8    
Selling profit recognized 11        
Net investment in finance lease arrangement         $ 133
Interest income recognized under finance leases $ 4 $ 1 $ 8 $ 2  
v3.20.2
Leases (Components of Net Investment in Finance Leases) (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Leases [Abstract]  
2020 $ 14
2021 24
2022 20
2023 19
2024 19
2025 and Thereafter 273
Total minimum future lease receipts 369
Residual value of leased pipeline 19
Less unearned income 205
Net investment in finance lease 183
Less current portion 11
Net investment in finance lease, noncurrent $ 172
v3.20.2
Leases (Lease Income Associated with Operating Leases) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Leases [Abstract]        
Fixed payments $ 17 $ 17 $ 33 $ 34
Variable payments 16 25 39 52
Total lease income under operating leases $ 33 $ 42 $ 72 $ 86
v3.20.2
Commitments and Contingencies (Details Textuals)
$ in Millions
 1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2020
USD ($)
employee
NOV
Jun. 30, 2020
USD ($)
employee
NOV
Jun. 30, 2019
USD ($)
Jun. 30, 2020
USD ($)
employee
site
facility
plant
NOV
Jun. 30, 2019
USD ($)
Dec. 31, 2019
USD ($)
Jul. 31, 2019
CAD ($)
Jul. 31, 2009
plant
Loss Contingencies [Line Items]                
Estimated utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees $ 4,500 $ 4,500   $ 4,500        
Certain non-qualified benefit plan trusts                
Loss Contingencies [Line Items]                
Pre-tax investment gains (losses)   $ 22 $ 7 $ (9) $ 24      
Power and Industrial Projects                
Loss Contingencies [Line Items]                
Number of generating plants operated with ownership interest held | plant       5        
Workforce subject to collective bargaining arrangements | Labor force concentration risk                
Loss Contingencies [Line Items]                
Number of employees | employee 5,200 5,200   5,200        
Synthetic fuel                
Loss Contingencies [Line Items]                
Number of days after expiration of statutes of limitations       90 days        
Maximum potential liability $ 400 $ 400   $ 400        
Reduced emissions fuel guarantees                
Loss Contingencies [Line Items]                
Number of days after expiration of statutes of limitations       90 days        
Maximum potential liability 470 470   $ 470        
Other guarantees                
Loss Contingencies [Line Items]                
Maximum potential liability 51 51   51        
Performance surety bonds                
Loss Contingencies [Line Items]                
Performance bonds outstanding 123 123   $ 123        
Reduction of Carbon Emissions by Early 2020s                
Loss Contingencies [Line Items]                
Commitment to reduce carbon emissions, percentage       32.00%        
Reduction of Carbon Emissions by 2030                
Loss Contingencies [Line Items]                
Commitment to reduce carbon emissions, percentage       50.00%        
Reduction of Carbon Emissions by 2040                
Loss Contingencies [Line Items]                
Commitment to reduce carbon emissions, percentage       80.00%        
The Sierra Club                
Loss Contingencies [Line Items]                
Amount accrued for settlement 7 7   $ 7        
DTE Gas | NEXUS pipeline                
Loss Contingencies [Line Items]                
Maximum potential liability 226 226   $ 226        
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements       2 months        
Texas Eastern Transmission, LP | NEXUS pipeline                
Loss Contingencies [Line Items]                
Maximum potential liability 360 360   $ 360        
Percentage of payment obligations due       50.00%        
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements       2 months        
Vector | Revolving Term Credit Facility                
Loss Contingencies [Line Items]                
Revolving term credit facility amount             $ 70,000,000  
Maximum potential payments under line of credit 51 51   $ 51        
Vector | NEXUS pipeline                
Loss Contingencies [Line Items]                
Maximum potential liability $ 7 $ 7   $ 7        
Percentage of payment obligations due       50.00%        
Guarantee termination, minimum threshold, period following end of primary term of capacity lease agreements       15 years        
DTE Electric                
Loss Contingencies [Line Items]                
Number of power plants in violation | plant               5
Number of NOVs/FOVs | NOV 2 2   2        
Environmental capital expenditures through prior year end           $ 2,400    
Number of former MGP sites | site       3        
Accrued for remediation $ 7 $ 7   $ 7   8    
Number of permitted engineered ash storage facilities owned | facility       3        
Estimated utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees $ 2,600 2,600   $ 2,600        
DTE Electric | COVID-19 Pandemic | Certain non-qualified benefit plan trusts                
Loss Contingencies [Line Items]                
Pre-tax investment gains (losses)   $ 22   $ (9)        
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk                
Loss Contingencies [Line Items]                
Number of employees | employee 2,800 2,800   2,800        
DTE Electric | Performance surety bonds                
Loss Contingencies [Line Items]                
Performance bonds outstanding $ 68 $ 68   $ 68        
DTE Electric | Reduction of Carbon Emissions by 2050                
Loss Contingencies [Line Items]                
Goal of net carbon emissions, percentage       0.00%        
DTE Electric | Coal Combustion Residual Rule                
Loss Contingencies [Line Items]                
Estimated impact of the current rule 609 609   $ 609        
DTE Gas                
Loss Contingencies [Line Items]                
Number of former MGP sites | site       14        
Accrued for remediation $ 24 24   $ 24   $ 25    
Amortization period (in years)       10 years        
DTE Gas | COVID-19 Pandemic | Certain non-qualified benefit plan trusts                
Loss Contingencies [Line Items]                
Pre-tax investment gains (losses)   $ 2   $ (1)        
DTE Gas | Clean up completed and site closed                
Loss Contingencies [Line Items]                
Number of former MGP sites | site       8        
DTE Gas | Partial closure complete                
Loss Contingencies [Line Items]                
Number of former MGP sites | site       4        
DTE Gas | Reduction of Greenhouse Gas Emissions by 2050                
Loss Contingencies [Line Items]                
Goal of net greenhouse gas emissions, percentage 0.00%              
DTE Gas | DTE Gas | NEXUS pipeline                
Loss Contingencies [Line Items]                
Percentage of payment obligations due       50.00%        
NEXUS | DTE Gas | NEXUS pipeline                
Loss Contingencies [Line Items]                
Agreement term       15 years        
NEXUS | Texas Eastern Transmission, LP | NEXUS pipeline                
Loss Contingencies [Line Items]                
Agreement term       15 years        
NEXUS | Vector | NEXUS pipeline                
Loss Contingencies [Line Items]                
Agreement term       15 years        
v3.20.2
Retirement Benefits and Trusteed Assets (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 24 $ 21 $ 49 $ 42
Interest cost 47 54 93 109
Expected return on plan assets (83) (81) (166) (162)
Amortization of net actuarial loss 43 34 86 66
Amortization of prior service credit 0 0 0 0
Net periodic benefit cost (credit) 31 28 62 55
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 7 6 13 11
Interest cost 14 17 28 35
Expected return on plan assets (32) (31) (64) (62)
Amortization of net actuarial loss 3 3 8 6
Amortization of prior service credit (5) (2) (10) (4)
Net periodic benefit cost (credit) (13) (7) (25) (14)
Other Postretirement Benefits | DTE Electric        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 5 4 10 8
Interest cost 10 14 21 27
Expected return on plan assets (22) (21) (44) (42)
Amortization of net actuarial loss 3 1 6 2
Amortization of prior service credit (3) (3) (7) (4)
Net periodic benefit cost (credit) $ (7) $ (5) $ (14) $ (9)
v3.20.2
Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Anticipated contributions, remainder of fiscal year (up to) $ 185,000,000   $ 185,000,000  
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Anticipated contributions, remainder of fiscal year (up to) 0   0  
DTE Electric | Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Pension cost 25,000,000 $ 22,000,000 51,000,000 $ 45,000,000
Anticipated contributions, remainder of fiscal year (up to) $ 160,000,000   $ 160,000,000  
v3.20.2
Segment and Related Information (Details Textuals)
customer in Millions
Jun. 30, 2020
customer
Segment Reporting [Abstract]  
Number of electric utility customers 2.2
Number of gas utility customers 1.3
v3.20.2
Segment and Related Information (Financial Data - Inter-segment Billing) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting Information [Line Items]        
Revenues $ (2,583) $ (2,888) $ (5,605) $ (6,402)
Electric        
Segment Reporting Information [Line Items]        
Revenues (1,312) (1,190) (2,528) (2,425)
Gas        
Segment Reporting Information [Line Items]        
Revenues (251) (243) (791) (888)
Gas Storage and Pipelines        
Segment Reporting Information [Line Items]        
Revenues (172) (121) (342) (237)
Power and Industrial Projects        
Segment Reporting Information [Line Items]        
Revenues (219) (402) (526) (790)
Energy Trading        
Segment Reporting Information [Line Items]        
Revenues (740) (1,113) (1,653) (2,414)
Reconciliation and Eliminations        
Segment Reporting Information [Line Items]        
Revenues 112 181 236 353
Reconciliation and Eliminations | Electric        
Segment Reporting Information [Line Items]        
Revenues 15 13 30 27
Reconciliation and Eliminations | Gas        
Segment Reporting Information [Line Items]        
Revenues 4 3 8 5
Reconciliation and Eliminations | Gas Storage and Pipelines        
Segment Reporting Information [Line Items]        
Revenues 5 3 9 6
Reconciliation and Eliminations | Power and Industrial Projects        
Segment Reporting Information [Line Items]        
Revenues 80 157 174 302
Reconciliation and Eliminations | Energy Trading        
Segment Reporting Information [Line Items]        
Revenues 8 5 14 12
Reconciliation and Eliminations | Corporate and Other        
Segment Reporting Information [Line Items]        
Revenues $ 0 $ 0 $ 1 $ 1
v3.20.2
Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Utility operations $ 1,542 $ 1,417 $ 3,275 $ 3,281
Operating Revenues — Non-utility operations 1,041 1,471 2,330 3,121
Operating Revenues 2,583 2,888 5,605 6,402
Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations (112) (181) (236) (353)
Operating Revenues (112) (181) (236) (353)
Electric        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 1,312 1,190 2,528 2,425
Electric | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Utility operations 1,309 1,190 2,521 2,425
Operating Revenues — Non-utility operations 3 0 7 0
Electric | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (15) (13) (30) (27)
Gas        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 251 243 791 888
Gas | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Utility operations 251 243 791 888
Gas | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (4) (3) (8) (5)
Gas Storage and Pipelines        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 172 121 342 237
Gas Storage and Pipelines | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 172 121 342 237
Gas Storage and Pipelines | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (5) (3) (9) (6)
Power and Industrial Projects        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 219 402 526 790
Power and Industrial Projects | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 219 402 526 790
Power and Industrial Projects | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (80) (157) (174) (302)
Energy Trading        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 740 1,113 1,653 2,414
Energy Trading | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 740 1,113 1,653 2,414
Energy Trading | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (8) (5) (14) (12)
Corporate and Other | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 1 0 1 1
Corporate and Other | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues $ 0 $ 0 $ (1) $ (1)
v3.20.2
Segment and Related Information (Financial Data - Net Income (Loss) Attributable to DTE Energy by Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company $ 277 $ 182 $ 617 $ 583
Electric        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company 183 133 277 280
Gas        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company 1 8 122 159
Gas Storage and Pipelines        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company 70 50 142 98
Power and Industrial Projects        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company 25 29 55 55
Energy Trading        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company (1) (6) 33 26
Corporate and Other        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company $ (1) $ (32) $ (12) $ (35)
v3.20.2
Related Party Transactions (Details) - NEXUS - Equity Method Investee
 6 Months Ended
Jun. 30, 2020
DTE Gas | Capacity Lease Agreement  
Related Party Transaction [Line Items]  
Term of related party agreeement 15 years
DTE Gas | Service Agreement  
Related Party Transaction [Line Items]  
Term of related party agreeement 15 years
DTE Electric | Service Agreement  
Related Party Transaction [Line Items]  
Term of related party agreeement 20 years
v3.20.2
Related Party Transactions (Schedule of Related Party Transactions) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Related Party Transaction [Line Items]        
Operating Revenues — Utility operations $ 1,542 $ 1,417 $ 3,275 $ 3,281
Fuel, purchased power, and gas — utility 374 360 841 942
Fuel, purchased power, and gas — non-utility 789 1,258 1,757 2,643
DTE Electric        
Related Party Transaction [Line Items]        
Operating Revenues — Utility operations 1,309 1,190 2,521 2,425
Fuel, purchased power, and gas — utility 342 322 639 668
NEXUS | DTE Gas | Equity Method Investee        
Related Party Transaction [Line Items]        
Operating Revenues — Utility operations 8 8 16 16
Fuel, purchased power, and gas — utility 6 6 12 13
NEXUS | DTE Electric | Equity Method Investee        
Related Party Transaction [Line Items]        
Fuel, purchased power, and gas — utility 2 2 4 4
NEXUS | DTE Energy Trading | Equity Method Investee        
Related Party Transaction [Line Items]        
Fuel, purchased power, and gas — non-utility $ 6 $ 1 $ 13 $ 3