DTE ELECTRIC CO, 10-Q filed on 10/27/2020
Quarterly Report
v3.20.2
Document and Entity Information
 9 Months Ended
Sep. 30, 2020
shares
Document Type 10-Q
Document Quarterly Report true
Document Period End Date Sep. 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 193,559,593
Entity Central Index Key 0000936340
Current Fiscal Year End Date --12-31
Document Fiscal Year Focus 2020
Document Fiscal Period Focus Q3
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
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
2020 Series G 4.375% Junior Subordinated Debentures due 2080  
Title of 12(b) Security 2020 Series G 4.375% Junior Subordinated Debentures due 2080
Trading Symbol DTB
Security Exchange Name NYSE
v3.20.2
Consolidated Statements of Operations (Unaudited) - USD ($)
shares in Millions, $ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Operating Revenues        
Utility operations $ 1,844 $ 1,656 $ 5,119 $ 4,937
Non-utility operations 1,440 1,463 3,770 4,584
Operating Revenues 3,284 3,119 8,889 9,521
Operating Expenses        
Fuel, purchased power, and gas — utility 455 400 1,296 1,342
Fuel, purchased power, and gas — non-utility 1,180 1,257 2,937 3,900
Operation and maintenance 588 588 1,731 1,739
Depreciation and amortization 356 322 1,059 923
Taxes other than income 103 101 306 311
Asset (gains) losses and impairments, net (6) 1 39 14
Operating Expenses 2,676 2,669 7,368 8,229
Operating Income 608 450 1,521 1,292
Other (Income) and Deductions        
Interest expense 178 162 532 468
Interest income (15) (4) (31) (11)
Non-operating retirement benefits, net 5 9 20 28
Other income (120) (98) (286) (259)
Other expenses 20 17 72 40
Other (Income) and Deductions 68 86 307 266
Income Before Income Taxes 540 364 1,214 1,026
Income Tax Expense 63 47 118 122
Net Income 477 317 1,096 904
Less: Net Income (Loss) Attributable to Noncontrolling Interests 1 (2) 3 2
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 476 $ 319 $ 1,093 $ 902
Basic Earnings per Common Share        
Net Income Attributable to DTE Energy Company (in dollars per share) $ 2.47 $ 1.74 $ 5.67 $ 4.93
Diluted Earnings per Common Share        
Net Income Attributable to DTE Energy Company (in dollars per share) $ 2.46 $ 1.73 $ 5.66 $ 4.91
Weighted Average Common Shares Outstanding        
Basic (in shares) 193 183 192 183
Diluted (in shares) 193 184 193 184
DTE Electric        
Operating Revenues        
Utility operations $ 1,690 $ 1,519 $ 4,211 $ 3,944
Operating Expenses        
Fuel, purchased power, and gas — utility 451 399 1,090 1,067
Operation and maintenance 361 356 1,074 1,048
Depreciation and amortization 258 244 768 694
Taxes other than income 79 80 220 233
Asset (gains) losses and impairments, net 0 0 41 13
Operating Expenses 1,149 1,079 3,193 3,055
Operating Income 541 440 1,018 889
Other (Income) and Deductions        
Interest expense 83 80 249 234
Interest income 0 0 (2) (1)
Other income (18) (20) (68) (78)
Other expenses 18 14 66 34
Other (Income) and Deductions 83 74 245 189
Income Before Income Taxes 458 366 773 700
Income Tax Expense 58 59 96 113
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 400 $ 307 $ 677 $ 587
v3.20.2
Consolidated Statements of Comprehensive Income (Unaudited) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Net Income $ 477 $ 317 $ 1,096 $ 904
Net Income 476 319 1,093 902
Other comprehensive income (loss), net of tax:        
Benefit obligations, net of taxes of $1, $2, $3, and $4, respectively 2 4 7 11
Net unrealized gains (losses) on derivatives, net of taxes of $—, $(1), $1, and $(4), respectively 1 (4) 3 (13)
Foreign currency translation 0 0 0 1
Other comprehensive income (loss) 3 0 10 (1)
Comprehensive income 480 317 1,106 903
Less: Comprehensive income (loss) attributable to noncontrolling interests 1 (2) 3 2
Comprehensive Income Attributable to DTE Energy Company/DTE Electric Company 479 319 1,103 901
DTE Electric        
Net Income 400 307 677 587
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 $ 400 $ 307 $ 677 $ 587
v3.20.2
Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Statement of Comprehensive Income [Abstract]        
Tax effect on benefit obligation $ 1 $ 2 $ 3 $ 4
Tax effect on net unrealized gains (losses) on derivatives during the period $ 0 $ (1) $ 1 $ (4)
v3.20.2
Consolidated Statements of Financial Position (Unaudited) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Current Assets    
Cash and cash equivalents $ 945 $ 93
Restricted cash 17 0
Accounts receivable (less allowance for doubtful accounts)    
Customer 1,419 1,642
Other 140 245
Inventories    
Fuel and gas 412 373
Materials and supplies 403 386
Derivative assets 65 133
Regulatory assets 125 5
Other 295 209
Total Current Assets 3,821 3,086
Investments    
Nuclear decommissioning trust funds 1,664 1,661
Investments in equity method investees 1,865 1,862
Other 186 265
Total Investments 3,715 3,788
Property    
Property, plant, and equipment 37,256 35,072
Accumulated depreciation and amortization (10,097) (9,755)
Property, plant, and equipment, net 27,159 25,317
Other Assets    
Goodwill 2,465 2,464
Regulatory assets 4,187 4,171
Intangible assets 2,358 2,393
Notes receivable 255 202
Derivative assets 29 41
Prepaid postretirement costs 125 69
Operating lease right-of-use assets 157 169
Other 168 182
Total Other Assets 9,744 9,691
Total Assets 44,439 41,882
Accounts payable    
Accounts payable 964 1,076
Accrued interest 167 147
Dividends payable 196 195
Short-term borrowings 988 828
Current portion long-term debt, including finance leases 467 687
Derivative liabilities 60 83
Regulatory liabilities 34 65
Short-term borrowings    
Operating lease liabilities 32 33
Acquisition related deferred payment 0 379
Other 509 504
Total Current Liabilities 3,417 3,997
Long-Term Debt (net of current portion)    
Mortgage bonds, notes, and other 17,052 14,778
Junior subordinated debentures 1,146 1,146
Finance lease liabilities 21 11
Total Long-Term Debt (net of current portion) 18,219 15,935
Other Liabilities    
Deferred income taxes 2,736 2,315
Regulatory liabilities 3,129 3,264
Asset retirement obligations 2,794 2,672
Unamortized investment tax credit 163 166
Derivative liabilities 44 86
Accrued pension liability 682 808
Nuclear decommissioning 251 249
Operating lease liabilities 116 127
Other 400 427
Total Other Liabilities 10,315 10,114
Commitments and Contingencies (Notes 6 and 13)
Equity    
Common stock 5,369 5,233
Retained earnings 7,092 6,587
Accumulated other comprehensive income (loss) (138) (148)
Total DTE Energy/DTE Electric Company Equity 12,323 11,672
Noncontrolling interests 165 164
Total Equity 12,488 11,836
Total Liabilities and Equity 44,439 41,882
DTE Electric    
Current Assets    
Cash and cash equivalents 189 12
Accounts receivable (less allowance for doubtful accounts)    
Customer 784 729
Affiliates 1 25
Other 81 41
Inventories    
Fuel and gas 204 187
Materials and supplies 293 280
Regulatory assets 123 5
Prepaid property tax 115 52
Other 25 26
Total Current Assets 1,815 1,357
Investments    
Nuclear decommissioning trust funds 1,664 1,661
Other 38 38
Total Investments 1,702 1,699
Property    
Property, plant, and equipment 25,585 24,279
Accumulated depreciation and amortization (6,895) (6,706)
Property, plant, and equipment, net 18,690 17,573
Other Assets    
Regulatory assets 3,500 3,448
Intangible assets 11 15
Prepaid postretirement costs — affiliates 266 266
Operating lease right-of-use assets 78 87
Other 137 143
Total Other Assets 3,992 3,959
Total Assets 26,199 24,588
Accounts payable    
Affiliates 65 59
Other 392 406
Accrued interest 79 84
Current portion long-term debt, including finance leases 466 636
Regulatory liabilities 12 40
Short-term borrowings    
Affiliates 104 97
Other 200 354
Operating lease liabilities 12 12
Other 167 155
Total Current Liabilities 1,497 1,843
Long-Term Debt (net of current portion)    
Mortgage bonds, notes, and other 7,773 6,548
Finance lease liabilities 14 4
Total Long-Term Debt (net of current portion) 7,787 6,552
Other Liabilities    
Deferred income taxes 2,489 2,355
Regulatory liabilities 2,441 2,546
Asset retirement obligations 2,564 2,447
Unamortized investment tax credit 163 166
Nuclear decommissioning 251 249
Accrued pension liability — affiliates 637 717
Accrued postretirement liability — affiliates 332 367
Operating lease liabilities 59 67
Other 111 84
Total Other Liabilities 9,047 8,998
Commitments and Contingencies (Notes 6 and 13)
Equity    
Common stock 5,211 4,811
Retained earnings 2,657 2,384
Total DTE Energy/DTE Electric Company Equity 7,868 7,195
Total Liabilities and Equity $ 26,199 $ 24,588
v3.20.2
Consolidated Statements of Financial Position (Unaudited) (Parenthetical) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Allowance for doubtful accounts $ 87 $ 91
Shareholder’s Equity    
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 193,559,593 192,208,533
Common stock, shares outstanding (in shares) 193,559,593 192,208,533
DTE Electric    
Allowance for doubtful accounts $ 49 $ 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
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Operating Activities    
Net Income $ 1,096 $ 904
Net Income 1,093 902
Adjustments to reconcile Net Income to Net cash from operating activities:    
Depreciation and amortization 1,059 923
Nuclear fuel amortization 22 45
Allowance for equity funds used during construction (19) (18)
Deferred income taxes 350 285
Equity earnings of equity method investees (96) (77)
Dividends from equity method investees 122 129
Asset (gains) losses and impairments, net 44 14
Changes in assets and liabilities:    
Accounts receivable, net 343 188
Inventories (54) 5
Prepaid postretirement benefit costs (56) (29)
Accounts payable (80) (291)
Accrued pension liability (126) (179)
Derivative assets and liabilities 15 8
Regulatory assets and liabilities (30) 203
Other current and noncurrent assets and liabilities 191 (209)
Net cash from operating activities 2,781 1,901
Investing Activities    
Plant and equipment expenditures — utility (2,362) (1,982)
Plant and equipment expenditures — non-utility (526) (177)
Acquisitions related to business combinations, net of cash acquired (126) (174)
Proceeds from sale of assets 7 0
Proceeds from sale of nuclear decommissioning trust fund assets 2,054 594
Investment in nuclear decommissioning trust funds (2,051) (599)
Distributions from equity method investees 6 9
Contributions to equity method investees (32) (128)
Notes receivable (58) (81)
Other (5) (20)
Net cash used for investing activities (3,093) (2,558)
Financing Activities    
Issuance of long-term debt, net of issuance costs 2,724 1,433
Redemption of long-term debt (682) 0
Short-term borrowings, net 160 115
Dividends paid on common stock (574) (518)
Contributions from noncontrolling interests, principally REF entities 25 23
Distributions to noncontrolling interests (27) (44)
Purchases of noncontrolling interest, principally SGG 0 (300)
Acquisition related deferred payment (380) 0
Other (65) (52)
Net cash from financing activities 1,181 657
Net Increase in Cash, Cash Equivalents, and Restricted Cash 869 0
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 93 76
Cash, Cash Equivalents, and Restricted Cash at End of Period 962 76
Supplemental disclosure of non-cash investing and financing activities    
Plant and equipment expenditures in accounts payable 282 292
DTE Electric    
Operating Activities    
Net Income 677 587
Adjustments to reconcile Net Income to Net cash from operating activities:    
Depreciation and amortization 768 694
Nuclear fuel amortization 22 45
Allowance for equity funds used during construction (18) (17)
Deferred income taxes 74 66
Asset (gains) losses and impairments, net 41 13
Changes in assets and liabilities:    
Accounts receivable, net (71) (20)
Inventories (30) (14)
Accounts payable 37 (15)
Accrued pension liability — affiliates (80) (107)
Accrued postretirement liability — affiliates (35) (16)
Regulatory assets and liabilities (79) 178
Other current and noncurrent assets and liabilities (20) (237)
Net cash from operating activities 1,286 1,157
Investing Activities    
Plant and equipment expenditures (1,981) (1,611)
Proceeds from sale of nuclear decommissioning trust fund assets 2,054 594
Investment in nuclear decommissioning trust funds (2,051) (599)
Other (14) (19)
Net cash used for investing activities (1,992) (1,635)
Financing Activities    
Issuance of long-term debt, net of issuance costs 1,683 643
Redemption of long-term debt (632) 0
Capital contribution by parent company 400 0
Short-term borrowings, net — affiliate 7 (4)
Short-term borrowings, net — other (154) 233
Dividends paid on common stock (404) (370)
Other (17) (16)
Net cash from financing activities 883 486
Net Increase in Cash, Cash Equivalents, and Restricted Cash 177 8
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 12 18
Cash, Cash Equivalents, and Restricted Cash at End of Period 189 26
Supplemental disclosure of non-cash investing and financing activities    
Plant and equipment expenditures in accounts payable $ 141 $ 168
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 902               587      
Net Income (Loss) 904                      
Other comprehensive income (loss), net of tax (1)               0      
Ending Balance (in shares) at Sep. 30, 2019     183,397,000             138,632,000    
Ending Balance at Sep. 30, 2019 10,904   $ 4,370 6,516   (146)   164        
Ending Balance at Sep. 30, 2019                 7,010 $ 1,386 3,245 2,379
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                 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)            
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
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income 319               307     307
Net Income (Loss) 317     319       (2)        
Dividends declared on common stock                 (123)     (123)
Other comprehensive income (loss), net of tax 0               0      
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)     95,000                  
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other 18   $ 26 (1)       (7)        
Ending Balance (in shares) at Sep. 30, 2019     183,397,000             138,632,000    
Ending Balance at Sep. 30, 2019 $ 10,904   $ 4,370 6,516   (146)   164        
Ending Balance at Sep. 30, 2019                 $ 7,010 $ 1,386 3,245 2,379
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 1,093               677      
Net Income (Loss) 1,096                      
Other comprehensive income (loss), net of tax $ 10               $ 0      
Ending Balance (in shares) at Sep. 30, 2020 193,559,593   193,560,000           138,632,324 138,632,000    
Ending Balance at Sep. 30, 2020 $ 12,488   $ 5,369 7,092   (138)   165        
Ending Balance at Sep. 30, 2020 12,323               $ 7,868 $ 1,386 3,825 2,657
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                 183     183
Net Income (Loss) 277     277                
Dividends declared on common stock (390)     (390)         (134)     (134)
Other comprehensive income (loss), net of tax 4         4            
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     192,651,000             138,632,000    
Ending Balance at Jun. 30, 2020 11,892   $ 5,247 6,618   (141)   168        
Ending Balance at Jun. 30, 2020                 7,203 $ 1,386 3,425 2,392
Increase (Decrease) in Stockholders' Equity [Roll Forward]                        
Net Income 476               400     400
Net Income (Loss) 477     476       1        
Dividends declared on common stock                 (135)     (135)
Capital contribution by parent company                 400   400  
Issuance of common stock (in shares)     98,000                  
Issuance of common stock 11   $ 11                  
Contribution of common stock to pension plan (in shares)     694,000                  
Contribution of common stock to pension plan 82   $ 82                  
Other comprehensive income (loss), net of tax 3         3     $ 0      
Stock-based compensation, net distributions to (contributions from) noncontrolling interests, and other (in shares)     117,000                  
Stock-based compensation, net (distributions to) contributions from noncontrolling interests, and other $ 23   $ 29 (2)       (4)        
Ending Balance (in shares) at Sep. 30, 2020 193,559,593   193,560,000           138,632,324 138,632,000    
Ending Balance at Sep. 30, 2020 $ 12,488   $ 5,369 $ 7,092   $ (138)   $ 165        
Ending Balance at Sep. 30, 2020 $ 12,323               $ 7,868 $ 1,386 $ 3,825 $ 2,657
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
 9 Months Ended
Sep. 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.
Certain prior year balances for DTE Electric were reclassified to match the current year's Consolidated Financial Statements presentation.
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, and 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 September 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 September 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 September 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:
September 30, 2020December 31, 2019
SGG(a)
OtherTotal
SGG(a)
OtherTotal
(In millions)
ASSETS
Cash and cash equivalents$33 $22 $55 $16 $11 $27 
Accounts receivable7 18 25 8 19 27 
Inventories— 102 102 — 74 74 
Property, plant, and equipment, net404 25 429 410 33 443 
Goodwill25 — 25 25 — 25 
Intangible assets531 — 531 542 — 542 
Other current and long-term assets1 19 20 2 — 2 
$1,001 $186 $1,187 $1,003 $137 $1,140 
LIABILITIES
Accounts payable and accrued current liabilities$— $19 $19 $2 $13 $15 
Short-term borrowings— 21 21 — — — 
Other current and long-term liabilities6 4 10 7 7 14 
$6 $44 $50 $9 $20 $29 
_____________________________________
(a)Amounts shown are 100% of SGG's assets and liabilities, of which DTE Energy owns 85% at September 30, 2020 and December 31, 2019.
Amounts for DTE Energy's non-consolidated VIEs are as follows:
September 30, 2020December 31, 2019
(In millions)
Investments in equity method investees$1,505 $1,503 
Notes receivable$40 $21 
Future funding commitments$36 $63 
v3.20.2
Significant Accounting Policies
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Equity earnings of equity method investees$37 $34 $96 $77 
Income from REF entities43 40 95 96 
Gains from equity and fixed income securities2 3 24 27 
Contract services7 7 20 21 
Gas Storage and Pipelines post-acquisition settlement20 — 20 — 
Allowance for equity funds used during construction6 5 19 18 
Other5 9 12 20 
$120 $98 $286 $259 
The following is a summary of DTE Electric's Other income:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Gains from equity and fixed income securities allocated from DTE Energy$2 $3 $24 $27 
Contract services7 7 20 23 
Allowance for equity funds used during construction6 5 18 17 
Other3 5 6 11 
$18 $20 $68 $78 
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 nine months ended September 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 nine months ended September 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 September 30,Nine Months Ended September 30,
2020201920202019
DTE Energy12 %13 %10 %12 %
DTE Electric13 %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 1% decrease in DTE Energy's effective tax rate for the three months ended September 30, 2020 was primarily due to higher amortization of the TCJA regulatory liability of 2%, partially offset by a decrease in annual production tax credits of 1%. The 2% decrease in DTE Energy's effective tax rate for the nine months ended September 30, 2020 was primarily due to the carryback of the 2018 net operating loss due to the CARES Act of 3% and higher amortization of the TCJA regulatory liability of 2%, partially offset by a decrease in production tax credits and other of 3%. Refer below for additional information regarding the CARES Act and related tax impacts.
The 3% decrease in DTE Electric's effective tax rate for the three months ended September 30, 2020 was primarily due to higher amortization of the TCJA regulatory liability of 3%. The 4% decrease in DTE Electric's effective tax rate for the nine months ended September 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 Electric had an income tax payable with DTE Energy of $5 million and an income tax receivable with DTE Energy of $14 million at September 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.
During the third quarter 2020, DTE Energy received $220 million of refunds from the U.S. Treasury, including $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 nine months ended September 30, 2020 due primarily to the difference in rates between the two years (35% in 2013 and 21% in 2018).
During the second quarter 2020, 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 nine months ended September 30, 2020. The Registrants have also deferred employer payroll taxes of $32 million, of which $17 million was attributable to DTE Electric, increasing the amount of Other Liabilities - Other on the Registrants' Consolidated Statements of Financial Position as of September 30, 2020.
Unrecognized Compensation Costs
As of September 30, 2020, DTE Energy had $84 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 1.41 years.
Allocated Stock-Based Compensation
DTE Electric received an allocation of costs from DTE Energy associated with stock-based compensation of $12 million and $9 million for the three months ended September 30, 2020 and 2019, respectively, while such allocation was $28 million and $33 million for the nine months ended September 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 September 30, 2020.
DTE EnergyDTE Electric
Year of origination
202020192018 and priorTotal2020 and prior
(In millions)
Notes receivable
Internal grade 1$— $18 $9 $27 $18 
Internal grade 260 19 6 85 — 
Total notes receivable(a)
$60 $37 $15 $112 $18 
Net investment in leases
Net investment in leases, internal grade 1$8 $— $40 $48 $— 
Net investment in leases, internal grade 2132 — 1 133 — 
Total net investment in leases(a)
$140 $— $41 $181 $— 
_______________________________________
(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 September 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 73 2 75 47 
Write-offs charged against allowance(117)(3)(120)(68)
Recoveries of amounts previously written off41 — 41 24 
Ending reserve balance, September 30, 2020$84 $3 $87 $49 
The Registrants have been monitoring the impacts from the COVID-19 pandemic on our customers and various counterparties. For DTE Electric and DTE Gas, the allowance for doubtful accounts has been increased to account for additional risk related to the pandemic. As of September 30, 2020, the impact of these increases has not been material.
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, DTE Electric and DTE Gas deferred $5 million and $1 million of uncollectible expense as Regulatory assets, respectively, for the nine months ended September 30, 2020. For the three months ended September 30, 2020, DTE Electric and DTE Gas, both reversed $1 million of previously deferred uncollectible expense. Refer to Note 6 to the Consolidated Financial Statements, "Regulatory Matters," for further information regarding the order.
For DTE Energy, uncollectible expense was $22 million and $70 million for the three and nine months ended September 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 $28 million and $81 million for the three and nine months ended September 30, 2019, respectively.
For DTE Electric, uncollectible expense was $16 million and $42 million for the three and nine months ended September 30, 2020, respectively, which is primarily comprised of the current period provision adjusted for regulatory deferrals. DTE Electric uncollectible expense was $17 million and $47 million for the three and nine months ended September 30, 2019, respectively.
There are no material amounts of past due financing receivables for the Registrants as of September 30, 2020.
v3.20.2
New Accounting Pronouncements
 9 Months Ended
Sep. 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. The Registrants will adopt the ASU on its effective date using a modified retrospective approach. The ASU will not have a significant impact on the Registrants' 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 optional expedients are effective for the modification of existing contracts or new arrangements executed March 12, 2020 through December 31, 2022. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
In August 2020, the FASB issued ASU No. 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity. The amendments in this update simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts indexed to and potentially settled in an entity's own equity. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2021, and interim periods therein. Early adoption is permitted. The ASU will not have a significant impact on the Registrants' Consolidated Financial Statements.
v3.20.2
Acquisitions
 9 Months Ended
Sep. 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. A liability for the contingent consideration payment was recorded upon acquisition and adjusted each period for accretion. Refer to the Acquisition related deferred payment line in the Consolidated Statements of Financial Position for the liability balance for the respective reporting periods. Accretion expense of $1 million and $5 million was recorded for the three and nine months ended September 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 resolution of any indemnification claims that might be deducted from the remaining $14 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 September 30, 2020, total goodwill was approximately $172 million, including $1 million resulting from working capital adjustments recorded during the nine months ended September 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
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Electric(a)
Residential$900 $791 $2,169 $1,839 
Commercial498 515 1,313 1,358 
Industrial157 175 434 497 
Other(b)
138 39 305 251 
Total Electric operating revenues(c)
$1,693 $1,520 $4,221 $3,945 
Gas
Gas sales$92 $87 $655 $727 
End User Transportation34 35 154 157 
Intermediate Transportation15 15 57 57 
Other(b)
32 18 98 102 
Total Gas operating revenues(d)
$173 $155 $964 $1,043 
Other segment operating revenues
Gas Storage and Pipelines(e)
$204 $126 $546 $363 
Power and Industrial Projects(f)
$324 $406 $850 $1,196 
Energy Trading(g)
$1,061 $1,105 $2,714 $3,519 
_______________________________________
(a)Revenues generally represent those of DTE Electric, except $3 million and $10 million of Other revenues related to DTE Sustainable Generation for the three and nine months ended September 30, 2020, respectively.
(b)Includes revenue adjustments related to various regulatory mechanisms.
(c)Includes $8 million and $5 million of other revenues outside the scope of topic 606 for the three months ended September 30, 2020 and 2019, and $18 million and $14 million for the nine months ended September 30, 2020 and 2019, respectively.
(d)Includes $2 million under Alternative Revenue Programs for the nine months ended September 30, 2020 and $2 million and $7 million of other revenues for the three and nine months ended September 30, 2020, respectively, which are all outside the scope of Topic 606. For prior period, revenues include $2 million and $6 million of other revenues for the three and nine months ended September 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 September 30, 2020 and 2019, and $7 million for the nine months ended September 30, 2020 and 2019.
(f)Includes revenues outside the scope of Topic 606 primarily related to $26 million and $33 million of contracts accounted for as leases for the three months ended September 30, 2020 and 2019, respectively, and $74 million and $94 million for the nine months ended September 30, 2020 and 2019, respectively.
(g)Includes revenues outside the scope of Topic 606 primarily related to $731 million and $791 million of derivatives for the three months ended September 30, 2020 and 2019, respectively, and $1.8 billion and $2.6 billion of derivatives for the nine months ended September 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 period39 
Revenue recognized that was included in the deferred revenue balance at the beginning of the period(42)
Ending Balance, September 30, 2020$72 
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$7 
202136 
20227 
20233 
20247 
2025 and thereafter12 
$72 
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$72 $2 
2021350 8 
2022294 7 
2023231 7 
2024142 8 
2025 and thereafter580 — 
$1,669 $32 
v3.20.2
Regulatory Matters
 9 Months Ended
Sep. 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, and there is currently no expiration for the ability to defer these costs. 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 do not plan to make a filing in response to this order, and will 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. The disallowance was recorded during the second quarter 2020 and is included in Asset (gains) losses and impairment, net on the Consolidated Statements of Operations for the nine months ended September 30, 2020.
2020 Accounting Applications
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 2021.
On October 26, 2020, DTE Electric filed an application with the MPSC requesting accounting authority for a one-time regulatory liability. DTE Electric is proposing to accrue a $30 million voluntary refund obligation due to certain sales increases resulting from the unusual and unprecedented electricity usage patterns driven by the COVID-19 pandemic. If approved by the end of 2020, the regulatory liability will be recognized at that time. Amortization of the regulatory liability would be used to offset the cost of service related to new plant in 2022. The regulatory liability would be amortized beginning January 1, 2022 through the earlier of new base rates or December 31, 2022. The one-time accounting treatment would not impact customer rates and would allow DTE Electric to further defer its next rate case filing from March 2021 to May 2021.
Additionally, as noted in Note 2 to the Consolidated Financial Statements, "Significant Accounting Policies," DTE Electric has deferred $5 million of uncollectible expense as Regulatory assets for the nine months ended September 30, 2020 as a result of the MPSC's COVID-19 response order discussed above. If the October 26th accounting application is approved, DTE Electric would voluntarily forgo this deferral and record as expense. This action would apply only to DTE Electric in 2020 and the deferral of uncollectible expense would resume beginning in January 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. The MPSC approved the settlement agreement in August 2020 and DTE Gas implemented 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 this result, DTE Gas recorded a disallowance of $14 million during the second quarter 2020, which is included in Asset (gains) losses and impairment, net on the Consolidated Statements of Operations for the nine months ended September 30, 2020.
v3.20.2
Earnings Per Share
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company$476 $319 $1,093 $902 
Less: Allocation of earnings to net restricted stock awards1 1 2 2 
Net income available to common shareholders — basic$475 $318 $1,091 $900 
Average number of common shares outstanding — basic193 183 192 183 
Basic Earnings per Common Share$2.47 $1.74 $5.67 $4.93 
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company$476 $319 $1,093 $902 
Less: Allocation of earnings to net restricted stock awards1 1 2 2 
Net income available to common shareholders — diluted$475 $318 $1,091 $900 
Average number of common shares outstanding — basic193 183 192 183 
Incremental shares attributable to:
Average dilutive equity units, performance share awards, and stock options— 1 1 1 
Average number of common shares outstanding — diluted193 184 193 184 
Diluted Earnings per Common Share(a)
$2.46 $1.73 $5.66 $4.91 
_______________________________________
(a)Equity Units excluded from the calculation of diluted EPS were approximately 10.3 million for the three and nine months ended September 30, 2020, as the dilutive stock price threshold was not met.
v3.20.2
Fair Value
 9 Months Ended
Sep. 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 September 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):
September 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)
$567 $— $— $— $— $567 $15 $— $— $— $— $15 
Nuclear decommissioning trusts
Equity securities872 — — 141 — 1,013 1,046 — — — — 1,046 
Fixed income securities122 325 — 80 — 527 160 378 — — — 538 
Private equity and other— — — 78 — 78 — — — 43 — 43 
Cash equivalents46 — — — — 46 34 — — — — 34 
Other investments(e)
Equity securities49 — — — — 49 140 — — — — 140 
Fixed income securities6 — — — — 6 79 — — — — 79 
Cash equivalents98 — — — — 98 4 — — — — 4 
Derivative assets
Commodity contracts(f)
Natural gas126 72 42 — (194)46 205 76 74 — (266)89 
Electricity— 103 34 — (106)31 — 223 83 — (225)81 
Environmental & Other— 194 7 — (186)15 — 110 3 — (110)3 
Foreign currency exchange contracts— 2 — — — 2 — 1 — — — 1 
Total derivative assets126 371 83 — (486)94 205 410 160 — (601)174 
Total$1,886 $696 $83 $299 $(486)$2,478 $1,683 $788 $160 $43 $(601)$2,073 
Liabilities
Derivative liabilities
Commodity contracts(f)
Natural gas$(118)$(66)$(81)$— $185 $(80)$(221)$(41)$(89)$— $266 $(85)
Electricity— (97)(29)— 104 (22)— (231)(67)— 225 (73)
Environmental & Other(3)(168)— — 171 — — (121)— — 110 (11)
Foreign currency exchange contracts— (2)— — — (2)— — — — — — 
Total$(121)$(333)$(110)$— $460 $(104)$(221)$(393)$(156)$— $601 $(169)
Net Assets (Liabilities) at end of period$1,765 $363 $(27)$299 $(26)$2,374 $1,462 $395 $4 $43 $— $1,904 
Assets
Current$679 $273 $59 $— $(379)$632 $218 $320 $123 $— $(513)$148 
Noncurrent1,207 423 24 299 (107)1,846 1,465 468 37 43 (88)1,925 
Total Assets$1,886 $696 $83 $299 $(486)$2,478 $1,683 $788 $160 $43 $(601)$2,073 
Liabilities
Current$(112)$(243)$(66)$— $361 $(60)$(211)$(300)$(85)$— $513 $(83)
Noncurrent(9)(90)(44)— 99 (44)(10)(93)(71)— 88 (86)
Total Liabilities$(121)$(333)$(110)$— $460 $(104)$(221)$(393)$(156)$— $601 $(169)
Net Assets (Liabilities) at end of period$1,765 $363 $(27)$299 $(26)$2,374 $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 September 30, 2020, the $567 million consisted of $565 million and $2 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:
September 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)
$175 $— $— $— $175 $11 $— $— $— $11 
Nuclear decommissioning trusts
Equity securities872 — — 141 1,013 1,046 — — — 1,046 
Fixed income securities122 325 — 80 527 160 378 — — 538 
Private equity and other— — — 78 78 — — — 43 43 
Cash equivalents46 — — — 46 34 — — — 34 
Other investments
Equity securities14 — — — 14 13 — — — 13 
Cash equivalents11 — — — 11 — — — — — 
Derivative assets — FTRs— — 7 — 7 — — 3 — 3 
Total$1,240 $325 $7 $299 $1,871 $1,264 $378 $3 $43 $1,688 
Assets
Current$175 $— $7 $— $182 $11 $— $3 $— $14 
Noncurrent1,065 325 — 299 1,689 1,253 378 — 43 1,674 
Total Assets$1,240 $325 $7 $299 $1,871 $1,264 $378 $3 $43 $1,688 
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
(b)At September 30, 2020, the $175 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, as well as publicly-traded commingled funds, are valued using quoted market prices in actively traded markets. Non-exchange traded fixed income securities are valued based upon quotations available from brokers or pricing services.
Non-publicly traded commingled funds holding exchange-traded equity or debt securities are valued based on stated NAVs. There are no significant restrictions for these funds and investments may be redeemed with 7 to 65 days notice depending on the fund. There is no intention to sell the investment in these commingled funds.
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 $192 million and $151 million as of September 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 September 30, 2020Three Months Ended September 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of June 30$20 $16 $10 $46 $(10)$10 $9 $9 
Transfers from Level 3 into Level 2(1)— — (1)— — — — 
Total gains (losses)
Included in earnings
(80)37 1 (42)(35)37 — 2 
Recorded in Regulatory liabilities— — 9 9 — — (3)(3)
Purchases, issuances, and settlements
Settlements22 (48)(13)(39)4 (39)(1)(36)
Net Assets (Liabilities) as of September 30$(39)$5 $7 $(27)$(41)$8 $5 $(28)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019(a)
$(57)$11 $(1)$(47)$(36)$15 $(1)$(22)
_______________________________________
(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.
Nine Months Ended September 30, 2020Nine Months Ended September 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of December 31$(15)$16 $3 $4 $(49)$(2)$7 $(44)
Transfers from Level 3 into Level 2(5)— — (5)— — — — 
Total gains (losses)
Included in earnings
(44)90 (7)39 (4)47 (1)42 
Recorded in Regulatory liabilities— — 21 21 — — 3 3 
Purchases, issuances, and settlements
Settlements25 (101)(10)(86)12 (37)(4)(29)
Net Assets (Liabilities) as of September 30$(39)$5 $7 $(27)$(41)$8 $5 $(28)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019(a)
$(20)$53 $(17)$16 $(20)$32 $(6)$6 
_______________________________________
(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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Net Assets as of beginning of period$10 $9 $3 $6 
Change in fair value recorded in Regulatory liabilities9 (3)21 3 
Purchases, issuances, and settlements
Settlements(12)(1)(17)(4)
Net Assets as of September 30$7 $5 $7 $5 
The amount of total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets held at September 30, 2020 and 2019 and reflected in DTE Electric's Consolidated Statements of Financial Position$— $(1)$7 $5 
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 nine months ended September 30, 2020 and 2019.
The following tables present the unobservable inputs related to DTE Energy's Level 3 assets and liabilities:
September 30, 2020
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$42 $(81)Discounted Cash FlowForward basis price (per MMBtu)$(1.10)—$2.30 /MMBtu$(0.06)/MMBtu
Electricity$34 $(29)Discounted Cash FlowForward basis price (per MWh)$(9)—$6 /MWh$(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 weighted average price for unobservable inputs was calculated using the average of forward price curves for natural gas and electricity and the absolute value of monthly volumes.
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:
September 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a), excluding lessor finance leases
$112 $— $— $112 $184 $— $— $184 
Short-term borrowings$988 $— $988 $— $828 $— $828 $— 
Notes payable — Other(b)
$19 $— $— $19 $25 $— $— $25 
Long-term debt(c)
$18,660 $2,398 $17,213 $1,406 $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:
September 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a)
$18 $— $— $18 $9 $— $— $9 
Short-term borrowings — affiliates$104 $— $— $104 $97 $— $— $97 
Short-term borrowings — other$200 $— $200 $— $354 $— $354 $— 
Notes payable — Other(b)
$17 $— $— $17 $21 $— $— $21 
Long-term debt(c)
$8,235 $— $9,565 $194 $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:
September 30, 2020December 31, 2019
(In millions)
Fermi 2$1,652 $1,650 
Fermi 13 3 
Low-level radioactive waste9 8 
$1,664 $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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Realized gains$38 $15 $172 $43 
Realized losses$(11)$(8)$(103)$(25)
Proceeds from sale of securities$816 $198 $2,054 $594 
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:
September 30, 2020December 31, 2019
Fair
Value		Unrealized
Gains		Unrealized
Losses		Fair
Value		Unrealized
Gains		Unrealized
Losses
(In millions)
Equity securities$1,013 $325 $(28)$1,046 $396 $(39)
Fixed income securities527 16 (1)538 24 (1)
Private equity and other78 — — 43 — — 
Cash equivalents46 — — 34 — — 
$1,664 $341 $(29)$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:
September 30, 2020
(In millions)
Due within one year$92 
Due after one through five years82 
Due after five through ten years79 
Due after ten years194 
$447 
Fixed income securities held in nuclear decommissioning trust funds include $80 million of non-publicly traded commingled funds that do not have a contractual maturity date.
Other Securities
At September 30, 2020 and December 31, 2019, the Registrants' securities included in Other investments on the Consolidated Statements of Financial Position were comprised primarily of investments 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Gains (losses) related to equity securities$2 $1 $(4)$18 
Gains (losses) related to fixed income securities— 2 (3)9 
$2 $3 $(7)$27 
v3.20.2
Financial and Other Derivative Instruments
 9 Months Ended
Sep. 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 September 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:
September 30, 2020December 31, 2019
Derivative
Assets		Derivative LiabilitiesDerivative
Assets		Derivative Liabilities
(In millions)
Derivatives designated as hedging instruments
Foreign currency exchange contracts$— $(1)$— $— 
Derivatives not designated as hedging instruments
Commodity contracts
Natural gas$240 $(265)$355 $(351)
Electricity137 (126)306 (298)
Environmental & Other201 (171)113 (121)
Foreign currency exchange contracts2 (1)1 — 
Total derivatives not designated as hedging instruments$580 $(563)$775 $(770)
Current$444 $(421)$646 $(596)
Noncurrent136 (143)129 (174)
Total derivatives$580 $(564)$775 $(770)
The following table presents the fair value of derivative instruments for DTE Electric:
September 30, 2020December 31, 2019
(In millions)
FTRs — Other current assets$7 $3 
Total derivatives not designated as hedging instruments$7 $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 $5 million and $6 million outstanding at September 30, 2020 and December 31, 2019, respectively, 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 $1 million and $4 million at September 30, 2020 and December 31, 2019, respectively. Such balances of letters of credit are excluded from the tables below and are not netted with the recognized assets and liabilities in DTE Energy's Consolidated Statements of Financial Position.
For contracts with certain clearing agents, the fair value of derivative instruments is netted against realized positions with the net balance reflected as either 1) a Derivative asset or liability or 2) an Account receivable or payable. Other than certain clearing agents, Accounts receivable and Accounts payable that are subject to netting arrangements have not been offset against the fair value of Derivative assets and liabilities.
The following table presents net cash collateral offsetting arrangements for DTE Energy:
September 30, 2020December 31, 2019
(In millions)
Cash collateral netted against Derivative assets$(26)$— 
Cash collateral recorded in Accounts receivable(a)
12 13 
Cash collateral recorded in Accounts payable(a)
(2)(3)
Total net cash collateral posted (received)$(16)$10 
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
September 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$240 $(194)$46 $355 $(266)$89 
Electricity137 (106)31 306 (225)81 
Environmental & Other201 (186)15 113 (110)3 
Foreign currency exchange contracts2 — 2 1 — 1 
Total derivative assets$580 $(486)$94 $775 $(601)$174 
Derivative liabilities
Commodity contracts
Natural gas$(265)$185 $(80)$(351)$266 $(85)
Electricity(126)104 (22)(298)225 (73)
Environmental & Other(171)171 — (121)110 (11)
Foreign currency exchange contracts(2)— (2)— — — 
Total derivative liabilities$(564)$460 $(104)$(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:
September 30, 2020December 31, 2019
Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
CurrentNoncurrentCurrentNoncurrentCurrentNoncurrentCurrentNoncurrent
(In millions)
Total fair value of derivatives$444 $136 $(421)$(143)$646 $129 $(596)$(174)
Counterparty netting(361)(99)361 99 (513)(88)513 88 
Collateral adjustment(18)(8)— — — — — — 
Total derivatives as reported$65 $29 $(60)$(44)$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 September 30,Gain (Loss) Recognized in Income on Derivatives for the Nine Months Ended September 30,
2020201920202019
(In millions)
Commodity contracts
Natural gasOperating Revenues — Non-utility operations$(27)$(5)$(63)$4 
Natural gasFuel, purchased power, and gas — non-utility(51)(47)28 (7)
ElectricityOperating Revenues — Non-utility operations33 54 75 21 
Environmental & OtherOperating Revenues — Non-utility operations2 (11)(40)(11)
Foreign currency exchange contractsOperating Revenues — Non-utility operations(2)1 — (2)
Total$(45)$(8)$— $5 
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 September 30, 2020:
CommodityNumber of Units
Natural gas (MMBtu)1,739,656,507 
Electricity (MWh)28,258,929 
Foreign currency exchange (CAD)154,336,963 
Renewable Energy Certificates (MWh)7,893,076 
Carbon emissions (Metric Ton)16,451,411 
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 September 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 $377 million.
As of September 30, 2020, DTE Energy had $472 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 $445 million. The net remaining amount of $27 million is derived from the $377 million noted above.
v3.20.2
Long-Term Debt
 9 Months Ended
Sep. 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 
DTE EnergyAugust
Senior Notes(c)
1.05%2025800 
DTE GasAugust
Mortgage Bonds(d)
2.35%2030125 
DTE GasAugust
Mortgage Bonds(d)
3.20%2050125 
$2,750 
_______________________________________
(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.
(c)Proceeds used for the repayment of short-term borrowings and for general corporate purposes.
(d)Proceeds used for the repayment of $50 million of DTE Gas's 2008 Series I 6.36% Senior Notes due 2020 and for general corporate purposes, including capital expenditures.
In March 2020, DTE Energy entered into a $200 million unsecured term loan with a maturity date of March 2022 and terms consistent with DTE Energy’s unsecured revolving credit agreements. The purpose of the loan was to enhance liquidity and reduce reliance on the commercial paper market. The loan was subject to terminate if no amounts were drawn by August 27, 2020. No amounts were drawn, therefore the loan terminated per the agreement.
In October 2020, DTE Energy issued $230 million of 4.375% Junior Subordinated Debentures due October 15, 2080. Proceeds have been used for the redemption of DTE Energy's $200 million 2012 Series C 5.25% Junior Subordinated Debentures due December 1, 2062. Remaining proceeds will be used for general corporate purposes.
In October 2020, DTE Energy also issued $750 million of 0.55% Senior Notes due November 1, 2022. Proceeds have been used for the repayment of DTE Energy's $500 million unsecured term loan expiring March 2021 and DTE Energy's $167 million unsecured term loan expiring June 2021. Remaining proceeds will be used for general corporate purposes. Refer to Note 11 to the Consolidated Financial Statements, "Short-term Credit Arrangements and Borrowings", for additional information regarding the term loans.
Debt Redemptions
In 2020, the following debt was redeemed:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricMarchSenior Notes4.89%2020$300 
DTE ElectricJulySenior Notes5.63%202032 
DTE ElectricJulySenior Notes3.45%2020300 
DTE GasSeptemberSenior Notes6.36%202050 
$682 
As noted above, on October 22, 2020, DTE Energy also optionally redeemed its $200 million 2012 Series C 5.25% Junior Subordinated Debentures originally due December 1, 2062.
v3.20.2
Short-Term Credit Arrangements and Borrowings
 9 Months Ended
Sep. 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 was drawn.
In April 2020, DTE Electric entered into a $200 million unsecured term loan, of which the full $200 million was 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 was 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$28 million outstanding as of September 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 the full amount was drawn in September 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 September 30, 2020, the total funded debt to total capitalization ratios for DTE Energy, DTE Electric, and DTE Gas were 0.60 to 1, 0.52 to 1, and 0.49 to 1, respectively, and were in compliance with this financial covenant.
The availability under these facilities as of September 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 202383 — — 83 
Unsecured revolving credit facility, expiring April 20241,500 500 300 2,300 
2,510 900 400 3,810 
Amounts outstanding at September 30, 2020
Letters of credit212 — — 212 
Unsecured term loan667 200 100 967 
Revolver borrowings21 — — 21 
900 200 100 1,200 
Net availability at September 30, 2020$1,610 $700 $300 $2,610 
DTE Energy has $59 million of other outstanding letters of credit which are used for various corporate purposes and are not included in the facilities described above. These letters of credit include a $50 million uncommitted letter of credit facility entered into by DTE Energy in July 2020, of which the full amount has been drawn. The facility expires in July 2021 with an automatic renewal provision.
In October 2020, DTE Energy repaid several of its unsecured term loans. As noted in Note 10 to the Consolidated Financial Statements, "Long-term Debt", DTE Energy used proceeds from the issuance of long-term debt to repay its $500 million term loan expiring March 2021 and $167 million term loan expiring June 2021. In October 2020, DTE Gas also repaid its $100 million term loan expiring April 2021.
In conjunction with maintaining certain exchange traded risk management positions, DTE Energy may be required to post collateral with its clearing agents. DTE Energy has demand financing agreements with its clearing agents, including an agreement for up to $100 million with an indefinite term and an agreement for up to $150 million currently contracted through 2022 and subject to renewal. The $100 million 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. Both agreements allow the right of setoff with posted collateral. At September 30, 2020, the capacity under the facilities was $300 million. The amount outstanding under the agreements was $43 million and $114 million at September 30, 2020 and December 31, 2019, respectively, and was fully offset by the posted collateral.
v3.20.2
Leases
 9 Months Ended
Sep. 30, 2020
Leases [Abstract]  
Leases LEASES
Lessor
During the second quarter 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 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
September 30, 2020
(In millions)
2020$8 
202124 
202220 
202319 
202419 
2025 and Thereafter273 
Total minimum future lease receipts363 
Residual value of leased pipeline19 
Less unearned income201 
Net investment in finance lease181 
Less current portion10 
$171 
Interest income recognized under finance leases was $4 million and $2 million for the three months ended September 30, 2020 and 2019, respectively, and $12 million and $4 million for the nine months ended September 30, 2020 and 2019, respectively.
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Fixed payments$17 $17 $50 $51 
Variable payments43 40 82 92 
$60 $57 $132 $143 
Leases LEASES
Lessor
During the second quarter 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 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
September 30, 2020
(In millions)
2020$8 
202124 
202220 
202319 
202419 
2025 and Thereafter273 
Total minimum future lease receipts363 
Residual value of leased pipeline19 
Less unearned income201 
Net investment in finance lease181 
Less current portion10 
$171 
Interest income recognized under finance leases was $4 million and $2 million for the three months ended September 30, 2020 and 2019, respectively, and $12 million and $4 million for the nine months ended September 30, 2020 and 2019, respectively.
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Fixed payments$17 $17 $50 $51 
Variable payments43 40 82 92 
$60 $57 $132 $143 
Leases LEASES
Lessor
During the second quarter 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 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
September 30, 2020
(In millions)
2020$8 
202124 
202220 
202319 
202419 
2025 and Thereafter273 
Total minimum future lease receipts363 
Residual value of leased pipeline19 
Less unearned income201 
Net investment in finance lease181 
Less current portion10 
$171 
Interest income recognized under finance leases was $4 million and $2 million for the three months ended September 30, 2020 and 2019, respectively, and $12 million and $4 million for the nine months ended September 30, 2020 and 2019, respectively.
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Fixed payments$17 $17 $50 $51 
Variable payments43 40 82 92 
$60 $57 $132 $143 
v3.20.2
Commitments and Contingencies
 9 Months Ended
Sep. 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 U.S. District Court and the public comment period ended on June 14, 2020. The Consent Decree was entered with the U.S. District Court with an effective date of July 23, 2020 and DTE Electric subsequently paid a civil penalty of $2 million. As of September 30, 2020, an additional $5 million remains accrued for the settlement. The U.S. District Court is still reviewing the Sierra Club Consent Decree and a final decision is expected in the fourth 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. DTE Electric is required to retire, repower, refuel, or retrofit units at four power plants by the dates set forth in the Consent Decree and implement a supplemental environmental project. 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 has spent approximately $2.4 billion. DTE Electric does not anticipate additional capital expenditures for air pollution requirements through 2025, 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. Cleanup of one of the MGP sites is complete, and the site is closed. 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 September 30, 2020 and December 31, 2019, DTE Electric had $6 million and $8 million, respectively, accrued for remediation. These costs are not discounted to their present value. 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, July 2018, and September 2020. 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 ongoing sampling and testing of monitoring wells, compliance with groundwater standards, and the closure of basins at the end of the useful life of the associated power plant. DTE Electric has estimated the impact of the current rule to be $629 million of capital expenditures.
On September 28, 2020, the CCR rule "A Holistic Approach to Closure Part A: Deadline to Initiate Closure and Enhancing Public Access to Information" became effective and establishes April 11, 2021 as the new deadline for all unlined impoundments (including units previously classified as "clay-lined") to initiate closure. Additionally, the rule amends certain reporting requirements and CCR website requirements. 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 both the final September 28, 2020 rule and the proposed CCR rule, including the alternative liner system demonstration for our clay lined impoundments, 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 flue gas desulfurization (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 August 31, 2020, the EPA released the final version of the ELG Reconsideration Rule which revised the regulations from the 2015 ELG rule. The Reconsideration Rule revises requirements for two specific waste streams produced by steam electric power plants: FGD wastewater and bottom ash transport water. The Reconsideration Rule also provides additional compliance opportunities by finalizing low utilization and cessation of coal burning subcategories. The Reconsideration Rule provides new opportunities for DTE Electric to evaluate existing ELG compliance strategies and make any necessary adjustments to ensure full compliance with the ELGs in a cost effective manner.
DTE Electric is currently evaluating compliance strategies, technologies and system designs for both FGD wastewater and bottom ash transport water system to achieve compliance with the final rule.
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 September 30, 2020 and December 31, 2019, DTE Gas had $24 million and $25 million, respectively, accrued for remediation. These costs are not discounted to their present value. 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 September 30, 2020 was approximately $400 million. Payment under these guarantees is 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 September 30, 2020 was $543 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 September 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 September 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 $50 million at September 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 September 30, 2020, DTE Energy had $125 million of performance bonds outstanding, including $69 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 payment under the line of credit at September 30, 2020 is $52 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.
Impacts from the COVID-19 pandemic for the three and nine months ended September 30, 2020 include a reduction in DTE Electric sales volumes from commercial and industrial customers and an increase in residential customer sales volumes. This shift contributed to a net reduction in DTE Electric sales volumes for the three and nine months ended September 30, 2020, but the impact to earnings has been mitigated by favorable rate mix.
Operation and maintenance expense 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, the impact of these increases has not been material.
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 September 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
 9 Months Ended
Sep. 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 September 30,
2020201920202019
(In millions)
Service cost$25 $21 $7 $5 
Interest cost46 55 14 18 
Expected return on plan assets(84)(82)(32)(30)
Amortization of:
Net actuarial loss43 33 4 3 
Prior service credit— — (5)(3)
Settlements2 — — — 
Net periodic benefit cost (credit)$32 $27 $(12)$(7)
Pension BenefitsOther Postretirement Benefits
Nine Months Ended September 30,
2020201920202019
(In millions)
Service cost$74 $63 $20 $16 
Interest cost139 164 42 53 
Expected return on plan assets(250)(244)(96)(92)
Amortization of:
Net actuarial loss129 99 12 9 
Prior service credit— — (15)(7)
Settlements2 — — — 
Net periodic benefit cost (credit)$94 $82 $(37)$(21)
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 $28 million and $23 million for the three months ended September 30, 2020 and 2019, respectively, and $79 million and $68 million for the nine months ended September 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)(In millions)
Service cost$5 $4 $15 $12 
Interest cost11 13 32 40 
Expected return on plan assets(21)(21)(65)(63)
Amortization of:
Net actuarial loss2 1 8 3 
Prior service credit(3)(1)(10)(5)
Net periodic benefit credit$(6)$(4)$(20)$(13)
Pension and Other Postretirement Contributions
For the nine months ended September 30, 2020, DTE Energy made contributions of $84 million to its qualified pension plans, including $82 million of common stock and $2 million of cash contributions. Details of the contribution of common stock to the DTE Energy Company Affiliates Employee Benefit Plans Master Trust are as follows:
DateNumber of SharesPrice per ShareAmount
(In millions)
September 8, 2020694,444$118.08 $82 
The above contribution was made on behalf of DTE Electric and DTE Gas, for which DTE Electric and DTE Gas paid DTE Energy cash consideration of $60 million and $22 million, respectively, in September 2020. DTE Energy is currently assessing whether any additional contributions will be made to its pension plans in 2020. If any further contributions are made, they are not expected to be material to the Consolidated Financial Statements. No contributions are anticipated for DTE Energy's postretirement benefit plans in 2020.
v3.20.2
Segment and Related Information
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Electric$16 $16 $46 $43 
Gas4 3 12 8 
Gas Storage and Pipelines8 11 17 17 
Power and Industrial Projects134 160 308 462 
Energy Trading9 4 23 16 
Corporate and Other1 1 2 2 
$172 $195 $408 $548 
Financial data of DTE Energy's business segments follows:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
Electric$1,690 $1,520 $4,211 $3,945 
Gas173 155 964 1,043 
Operating Revenues — Non-utility operations
Electric3 — 10 — 
Gas Storage and Pipelines204 126 546 363 
Power and Industrial Projects324 406 850 1,196 
Energy Trading1,061 1,105 2,714 3,519 
Corporate and Other1 2 2 3 
Reconciliation and Eliminations(172)(195)(408)(548)
Total$3,284 $3,119 $8,889 $9,521 
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Net Income (Loss) Attributable to DTE Energy by Segment:
Electric$398 $307 $675 $587 
Gas(20)(38)102 121 
Gas Storage and Pipelines104 60 246 158 
Power and Industrial Projects47 49 102 104 
Energy Trading(28)(14)5 12 
Corporate and Other(25)(45)(37)(80)
Net Income Attributable to DTE Energy Company$476 $319 $1,093 $902 
v3.20.2
Related Party Transactions
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
DTE Gas$8 $8 $24 $24 
Fuel, purchased power, and gas — utility
DTE Electric$2 $2 $6 $6 
DTE Gas$2 $2 $14 $15 
Fuel, purchased power, and gas — non-utility
DTE Energy Trading$7 $2 $20 $5 
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 nine months ended September 30, 2020 and 2019.
v3.20.2
Subsequent Event
 9 Months Ended
Sep. 30, 2020
Subsequent Events [Abstract]  
Subsequent Event SUBSEQUENT EVENTOn October 27, 2020, DTE Energy announced that its Board of Directors has authorized management to pursue a plan to spin-off the DTE Midstream business. DTE Energy expects to complete the separation by mid-year 2021, subject to final approval by its Board of Directors, the Form 10 registration statement being declared effective by the Securities and Exchange Commission, regulatory approvals, and satisfaction of other conditions. DTE Energy shareholder approval is not required to effect the separation transaction. Upon closing of the transaction, DTE Energy shareholders will own shares of both DTE Energy and the new Midstream company. The planned separation transaction is intended to be a tax-free spin to DTE Energy shareholders for U.S. federal income tax purposes. There can be no assurance that any separation transaction will ultimately occur or, if one does occur, of its terms or timing.
v3.20.2
Significant Accounting Policies (Policies)
 9 Months Ended
Sep. 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 Certain prior year balances for DTE Electric were reclassified to match the current year's Consolidated Financial Statements presentation.
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, and 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 September 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 September 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 September 30, 2020.
DTE EnergyDTE Electric
Year of origination
202020192018 and priorTotal2020 and prior
(In millions)
Notes receivable
Internal grade 1$— $18 $9 $27 $18 
Internal grade 260 19 6 85 — 
Total notes receivable(a)
$60 $37 $15 $112 $18 
Net investment in leases
Net investment in leases, internal grade 1$8 $— $40 $48 $— 
Net investment in leases, internal grade 2132 — 1 133 — 
Total net investment in leases(a)
$140 $— $41 $181 $— 
_______________________________________
(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. The Registrants will adopt the ASU on its effective date using a modified retrospective approach. The ASU will not have a significant impact on the Registrants' 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 optional expedients are effective for the modification of existing contracts or new arrangements executed March 12, 2020 through December 31, 2022. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
In August 2020, the FASB issued ASU No. 2020-06, Debt - Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity. The amendments in this update simplify the accounting for certain financial instruments with characteristics of liabilities and equity, including convertible instruments and contracts indexed to and potentially settled in an entity's own equity. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2021, and interim periods therein. Early adoption is permitted. The ASU will not have a significant impact on the Registrants' 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 September 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, as well as publicly-traded commingled funds, are valued using quoted market prices in actively traded markets. Non-exchange traded fixed income securities are valued based upon quotations available from brokers or pricing services.
Non-publicly traded commingled funds holding exchange-traded equity or debt securities are valued based on stated NAVs. There are no significant restrictions for these funds and investments may be redeemed with 7 to 65 days notice depending on the fund. There is no intention to sell the investment in these commingled funds.
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 $192 million and $151 million as of September 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 September 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 $5 million and $6 million outstanding at September 30, 2020 and December 31, 2019, respectively, 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 $1 million and $4 million at September 30, 2020 and December 31, 2019, respectively. 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)
 9 Months Ended
Sep. 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 September 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:
September 30, 2020December 31, 2019
SGG(a)
OtherTotal
SGG(a)
OtherTotal
(In millions)
ASSETS
Cash and cash equivalents$33 $22 $55 $16 $11 $27 
Accounts receivable7 18 25 8 19 27 
Inventories— 102 102 — 74 74 
Property, plant, and equipment, net404 25 429 410 33 443 
Goodwill25 — 25 25 — 25 
Intangible assets531 — 531 542 — 542 
Other current and long-term assets1 19 20 2 — 2 
$1,001 $186 $1,187 $1,003 $137 $1,140 
LIABILITIES
Accounts payable and accrued current liabilities$— $19 $19 $2 $13 $15 
Short-term borrowings— 21 21 — — — 
Other current and long-term liabilities6 4 10 7 7 14 
$6 $44 $50 $9 $20 $29 
_____________________________________
(a)Amounts shown are 100% of SGG's assets and liabilities, of which DTE Energy owns 85% at September 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:
September 30, 2020December 31, 2019
(In millions)
Investments in equity method investees$1,505 $1,503 
Notes receivable$40 $21 
Future funding commitments$36 $63 
v3.20.2
Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2020
Accounting Policies [Abstract]  
Schedule of Other Income
The following is a summary of DTE Energy's Other income:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Equity earnings of equity method investees$37 $34 $96 $77 
Income from REF entities43 40 95 96 
Gains from equity and fixed income securities2 3 24 27 
Contract services7 7 20 21 
Gas Storage and Pipelines post-acquisition settlement20 — 20 — 
Allowance for equity funds used during construction6 5 19 18 
Other5 9 12 20 
$120 $98 $286 $259 
The following is a summary of DTE Electric's Other income:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Gains from equity and fixed income securities allocated from DTE Energy$2 $3 $24 $27 
Contract services7 7 20 23 
Allowance for equity funds used during construction6 5 18 17 
Other3 5 6 11 
$18 $20 $68 $78 
Schedule of Effective Tax Rates
The interim effective tax rates of the Registrants are as follows:
Effective Tax Rate
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
DTE Energy12 %13 %10 %12 %
DTE Electric13 %16 %12 %16 %
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk
The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through September 30, 2020.
DTE EnergyDTE Electric
Year of origination
202020192018 and priorTotal2020 and prior
(In millions)
Notes receivable
Internal grade 1$— $18 $9 $27 $18 
Internal grade 260 19 6 85 — 
Total notes receivable(a)
$60 $37 $15 $112 $18 
Net investment in leases
Net investment in leases, internal grade 1$8 $— $40 $48 $— 
Net investment in leases, internal grade 2132 — 1 133 — 
Total net investment in leases(a)
$140 $— $41 $181 $— 
_______________________________________
(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 September 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 73 2 75 47 
Write-offs charged against allowance(117)(3)(120)(68)
Recoveries of amounts previously written off41 — 41 24 
Ending reserve balance, September 30, 2020$84 $3 $87 $49 
v3.20.2
Acquisitions (Tables)
 9 Months Ended
Sep. 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)
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Electric(a)
Residential$900 $791 $2,169 $1,839 
Commercial498 515 1,313 1,358 
Industrial157 175 434 497 
Other(b)
138 39 305 251 
Total Electric operating revenues(c)
$1,693 $1,520 $4,221 $3,945 
Gas
Gas sales$92 $87 $655 $727 
End User Transportation34 35 154 157 
Intermediate Transportation15 15 57 57 
Other(b)
32 18 98 102 
Total Gas operating revenues(d)
$173 $155 $964 $1,043 
Other segment operating revenues
Gas Storage and Pipelines(e)
$204 $126 $546 $363 
Power and Industrial Projects(f)
$324 $406 $850 $1,196 
Energy Trading(g)
$1,061 $1,105 $2,714 $3,519 
_______________________________________
(a)Revenues generally represent those of DTE Electric, except $3 million and $10 million of Other revenues related to DTE Sustainable Generation for the three and nine months ended September 30, 2020, respectively.
(b)Includes revenue adjustments related to various regulatory mechanisms.
(c)Includes $8 million and $5 million of other revenues outside the scope of topic 606 for the three months ended September 30, 2020 and 2019, and $18 million and $14 million for the nine months ended September 30, 2020 and 2019, respectively.
(d)Includes $2 million under Alternative Revenue Programs for the nine months ended September 30, 2020 and $2 million and $7 million of other revenues for the three and nine months ended September 30, 2020, respectively, which are all outside the scope of Topic 606. For prior period, revenues include $2 million and $6 million of other revenues for the three and nine months ended September 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 September 30, 2020 and 2019, and $7 million for the nine months ended September 30, 2020 and 2019.
(f)Includes revenues outside the scope of Topic 606 primarily related to $26 million and $33 million of contracts accounted for as leases for the three months ended September 30, 2020 and 2019, respectively, and $74 million and $94 million for the nine months ended September 30, 2020 and 2019, respectively.
(g)Includes revenues outside the scope of Topic 606 primarily related to $731 million and $791 million of derivatives for the three months ended September 30, 2020 and 2019, respectively, and $1.8 billion and $2.6 billion of derivatives for the nine months ended September 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 period39 
Revenue recognized that was included in the deferred revenue balance at the beginning of the period(42)
Ending Balance, September 30, 2020$72 
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$7 
202136 
20227 
20233 
20247 
2025 and thereafter12 
$72 
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$72 $2 
2021350 8 
2022294 7 
2023231 7 
2024142 8 
2025 and thereafter580 — 
$1,669 $32 
v3.20.2
Earnings Per Share (Tables)
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company$476 $319 $1,093 $902 
Less: Allocation of earnings to net restricted stock awards1 1 2 2 
Net income available to common shareholders — basic$475 $318 $1,091 $900 
Average number of common shares outstanding — basic193 183 192 183 
Basic Earnings per Common Share$2.47 $1.74 $5.67 $4.93 
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company$476 $319 $1,093 $902 
Less: Allocation of earnings to net restricted stock awards1 1 2 2 
Net income available to common shareholders — diluted$475 $318 $1,091 $900 
Average number of common shares outstanding — basic193 183 192 183 
Incremental shares attributable to:
Average dilutive equity units, performance share awards, and stock options— 1 1 1 
Average number of common shares outstanding — diluted193 184 193 184 
Diluted Earnings per Common Share(a)
$2.46 $1.73 $5.66 $4.91 
_______________________________________
(a)Equity Units excluded from the calculation of diluted EPS were approximately 10.3 million for the three and nine months ended September 30, 2020, as the dilutive stock price threshold was not met.
v3.20.2
Fair Value (Tables)
 9 Months Ended
Sep. 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):
September 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)
$567 $— $— $— $— $567 $15 $— $— $— $— $15 
Nuclear decommissioning trusts
Equity securities872 — — 141 — 1,013 1,046 — — — — 1,046 
Fixed income securities122 325 — 80 — 527 160 378 — — — 538 
Private equity and other— — — 78 — 78 — — — 43 — 43 
Cash equivalents46 — — — — 46 34 — — — — 34 
Other investments(e)
Equity securities49 — — — — 49 140 — — — — 140 
Fixed income securities6 — — — — 6 79 — — — — 79 
Cash equivalents98 — — — — 98 4 — — — — 4 
Derivative assets
Commodity contracts(f)
Natural gas126 72 42 — (194)46 205 76 74 — (266)89 
Electricity— 103 34 — (106)31 — 223 83 — (225)81 
Environmental & Other— 194 7 — (186)15 — 110 3 — (110)3 
Foreign currency exchange contracts— 2 — — — 2 — 1 — — — 1 
Total derivative assets126 371 83 — (486)94 205 410 160 — (601)174 
Total$1,886 $696 $83 $299 $(486)$2,478 $1,683 $788 $160 $43 $(601)$2,073 
Liabilities
Derivative liabilities
Commodity contracts(f)
Natural gas$(118)$(66)$(81)$— $185 $(80)$(221)$(41)$(89)$— $266 $(85)
Electricity— (97)(29)— 104 (22)— (231)(67)— 225 (73)
Environmental & Other(3)(168)— — 171 — — (121)— — 110 (11)
Foreign currency exchange contracts— (2)— — — (2)— — — — — — 
Total$(121)$(333)$(110)$— $460 $(104)$(221)$(393)$(156)$— $601 $(169)
Net Assets (Liabilities) at end of period$1,765 $363 $(27)$299 $(26)$2,374 $1,462 $395 $4 $43 $— $1,904 
Assets
Current$679 $273 $59 $— $(379)$632 $218 $320 $123 $— $(513)$148 
Noncurrent1,207 423 24 299 (107)1,846 1,465 468 37 43 (88)1,925 
Total Assets$1,886 $696 $83 $299 $(486)$2,478 $1,683 $788 $160 $43 $(601)$2,073 
Liabilities
Current$(112)$(243)$(66)$— $361 $(60)$(211)$(300)$(85)$— $513 $(83)
Noncurrent(9)(90)(44)— 99 (44)(10)(93)(71)— 88 (86)
Total Liabilities$(121)$(333)$(110)$— $460 $(104)$(221)$(393)$(156)$— $601 $(169)
Net Assets (Liabilities) at end of period$1,765 $363 $(27)$299 $(26)$2,374 $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 September 30, 2020, the $567 million consisted of $565 million and $2 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:
September 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)
$175 $— $— $— $175 $11 $— $— $— $11 
Nuclear decommissioning trusts
Equity securities872 — — 141 1,013 1,046 — — — 1,046 
Fixed income securities122 325 — 80 527 160 378 — — 538 
Private equity and other— — — 78 78 — — — 43 43 
Cash equivalents46 — — — 46 34 — — — 34 
Other investments
Equity securities14 — — — 14 13 — — — 13 
Cash equivalents11 — — — 11 — — — — — 
Derivative assets — FTRs— — 7 — 7 — — 3 — 3 
Total$1,240 $325 $7 $299 $1,871 $1,264 $378 $3 $43 $1,688 
Assets
Current$175 $— $7 $— $182 $11 $— $3 $— $14 
Noncurrent1,065 325 — 299 1,689 1,253 378 — 43 1,674 
Total Assets$1,240 $325 $7 $299 $1,871 $1,264 $378 $3 $43 $1,688 
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
(b)At September 30, 2020, the $175 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 September 30, 2020Three Months Ended September 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of June 30$20 $16 $10 $46 $(10)$10 $9 $9 
Transfers from Level 3 into Level 2(1)— — (1)— — — — 
Total gains (losses)
Included in earnings
(80)37 1 (42)(35)37 — 2 
Recorded in Regulatory liabilities— — 9 9 — — (3)(3)
Purchases, issuances, and settlements
Settlements22 (48)(13)(39)4 (39)(1)(36)
Net Assets (Liabilities) as of September 30$(39)$5 $7 $(27)$(41)$8 $5 $(28)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019(a)
$(57)$11 $(1)$(47)$(36)$15 $(1)$(22)
_______________________________________
(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.
Nine Months Ended September 30, 2020Nine Months Ended September 30, 2019
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of December 31$(15)$16 $3 $4 $(49)$(2)$7 $(44)
Transfers from Level 3 into Level 2(5)— — (5)— — — — 
Total gains (losses)
Included in earnings
(44)90 (7)39 (4)47 (1)42 
Recorded in Regulatory liabilities— — 21 21 — — 3 3 
Purchases, issuances, and settlements
Settlements25 (101)(10)(86)12 (37)(4)(29)
Net Assets (Liabilities) as of September 30$(39)$5 $7 $(27)$(41)$8 $5 $(28)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019(a)
$(20)$53 $(17)$16 $(20)$32 $(6)$6 
_______________________________________
(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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Net Assets as of beginning of period$10 $9 $3 $6 
Change in fair value recorded in Regulatory liabilities9 (3)21 3 
Purchases, issuances, and settlements
Settlements(12)(1)(17)(4)
Net Assets as of September 30$7 $5 $7 $5 
The amount of total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets held at September 30, 2020 and 2019 and reflected in DTE Electric's Consolidated Statements of Financial Position$— $(1)$7 $5 
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:
September 30, 2020
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$42 $(81)Discounted Cash FlowForward basis price (per MMBtu)$(1.10)—$2.30 /MMBtu$(0.06)/MMBtu
Electricity$34 $(29)Discounted Cash FlowForward basis price (per MWh)$(9)—$6 /MWh$(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:
September 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a), excluding lessor finance leases
$112 $— $— $112 $184 $— $— $184 
Short-term borrowings$988 $— $988 $— $828 $— $828 $— 
Notes payable — Other(b)
$19 $— $— $19 $25 $— $— $25 
Long-term debt(c)
$18,660 $2,398 $17,213 $1,406 $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:
September 30, 2020December 31, 2019
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a)
$18 $— $— $18 $9 $— $— $9 
Short-term borrowings — affiliates$104 $— $— $104 $97 $— $— $97 
Short-term borrowings — other$200 $— $200 $— $354 $— $354 $— 
Notes payable — Other(b)
$17 $— $— $17 $21 $— $— $21 
Long-term debt(c)
$8,235 $— $9,565 $194 $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:
September 30, 2020December 31, 2019
(In millions)
Fermi 2$1,652 $1,650 
Fermi 13 3 
Low-level radioactive waste9 8 
$1,664 $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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Realized gains$38 $15 $172 $43 
Realized losses$(11)$(8)$(103)$(25)
Proceeds from sale of securities$816 $198 $2,054 $594 
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:
September 30, 2020December 31, 2019
Fair
Value		Unrealized
Gains		Unrealized
Losses		Fair
Value		Unrealized
Gains		Unrealized
Losses
(In millions)
Equity securities$1,013 $325 $(28)$1,046 $396 $(39)
Fixed income securities527 16 (1)538 24 (1)
Private equity and other78 — — 43 — — 
Cash equivalents46 — — 34 — — 
$1,664 $341 $(29)$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:
September 30, 2020
(In millions)
Due within one year$92 
Due after one through five years82 
Due after five through ten years79 
Due after ten years194 
$447 
Summary of Gains (Losses) Related to the Trust The following table summarizes DTE Energy's gains (losses) related to the trust:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Gains (losses) related to equity securities$2 $1 $(4)$18 
Gains (losses) related to fixed income securities— 2 (3)9 
$2 $3 $(7)$27 
v3.20.2
Financial and Other Derivative Instruments (Tables)
 9 Months Ended
Sep. 30, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair Value of Derivative Instruments
The following table presents the fair value of derivative instruments for DTE Energy:
September 30, 2020December 31, 2019
Derivative
Assets		Derivative LiabilitiesDerivative
Assets		Derivative Liabilities
(In millions)
Derivatives designated as hedging instruments
Foreign currency exchange contracts$— $(1)$— $— 
Derivatives not designated as hedging instruments
Commodity contracts
Natural gas$240 $(265)$355 $(351)
Electricity137 (126)306 (298)
Environmental & Other201 (171)113 (121)
Foreign currency exchange contracts2 (1)1 — 
Total derivatives not designated as hedging instruments$580 $(563)$775 $(770)
Current$444 $(421)$646 $(596)
Noncurrent136 (143)129 (174)
Total derivatives$580 $(564)$775 $(770)
The following table presents the fair value of derivative instruments for DTE Electric:
September 30, 2020December 31, 2019
(In millions)
FTRs — Other current assets$7 $3 
Total derivatives not designated as hedging instruments$7 $3 
Netting Offsets of Derivative Assets
The following table presents net cash collateral offsetting arrangements for DTE Energy:
September 30, 2020December 31, 2019
(In millions)
Cash collateral netted against Derivative assets$(26)$— 
Cash collateral recorded in Accounts receivable(a)
12 13 
Cash collateral recorded in Accounts payable(a)
(2)(3)
Total net cash collateral posted (received)$(16)$10 
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
September 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$240 $(194)$46 $355 $(266)$89 
Electricity137 (106)31 306 (225)81 
Environmental & Other201 (186)15 113 (110)3 
Foreign currency exchange contracts2 — 2 1 — 1 
Total derivative assets$580 $(486)$94 $775 $(601)$174 
Derivative liabilities
Commodity contracts
Natural gas$(265)$185 $(80)$(351)$266 $(85)
Electricity(126)104 (22)(298)225 (73)
Environmental & Other(171)171 — (121)110 (11)
Foreign currency exchange contracts(2)— (2)— — — 
Total derivative liabilities$(564)$460 $(104)$(770)$601 $(169)
Netting Offsets of Derivative Liabilities
The following table presents net cash collateral offsetting arrangements for DTE Energy:
September 30, 2020December 31, 2019
(In millions)
Cash collateral netted against Derivative assets$(26)$— 
Cash collateral recorded in Accounts receivable(a)
12 13 
Cash collateral recorded in Accounts payable(a)
(2)(3)
Total net cash collateral posted (received)$(16)$10 
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
September 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$240 $(194)$46 $355 $(266)$89 
Electricity137 (106)31 306 (225)81 
Environmental & Other201 (186)15 113 (110)3 
Foreign currency exchange contracts2 — 2 1 — 1 
Total derivative assets$580 $(486)$94 $775 $(601)$174 
Derivative liabilities
Commodity contracts
Natural gas$(265)$185 $(80)$(351)$266 $(85)
Electricity(126)104 (22)(298)225 (73)
Environmental & Other(171)171 — (121)110 (11)
Foreign currency exchange contracts(2)— (2)— — — 
Total derivative liabilities$(564)$460 $(104)$(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:
September 30, 2020December 31, 2019
Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
CurrentNoncurrentCurrentNoncurrentCurrentNoncurrentCurrentNoncurrent
(In millions)
Total fair value of derivatives$444 $136 $(421)$(143)$646 $129 $(596)$(174)
Counterparty netting(361)(99)361 99 (513)(88)513 88 
Collateral adjustment(18)(8)— — — — — — 
Total derivatives as reported$65 $29 $(60)$(44)$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 September 30,Gain (Loss) Recognized in Income on Derivatives for the Nine Months Ended September 30,
2020201920202019
(In millions)
Commodity contracts
Natural gasOperating Revenues — Non-utility operations$(27)$(5)$(63)$4 
Natural gasFuel, purchased power, and gas — non-utility(51)(47)28 (7)
ElectricityOperating Revenues — Non-utility operations33 54 75 21 
Environmental & OtherOperating Revenues — Non-utility operations2 (11)(40)(11)
Foreign currency exchange contractsOperating Revenues — Non-utility operations(2)1 — (2)
Total$(45)$(8)$— $5 
Volume of Commodity Contracts
The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of September 30, 2020:
CommodityNumber of Units
Natural gas (MMBtu)1,739,656,507 
Electricity (MWh)28,258,929 
Foreign currency exchange (CAD)154,336,963 
Renewable Energy Certificates (MWh)7,893,076 
Carbon emissions (Metric Ton)16,451,411 
v3.20.2
Long-Term Debt (Tables)
 9 Months Ended
Sep. 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 
DTE EnergyAugust
Senior Notes(c)
1.05%2025800 
DTE GasAugust
Mortgage Bonds(d)
2.35%2030125 
DTE GasAugust
Mortgage Bonds(d)
3.20%2050125 
$2,750 
_______________________________________
(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.
(c)Proceeds used for the repayment of short-term borrowings and for general corporate purposes.
(d)Proceeds used for the repayment of $50 million of DTE Gas's 2008 Series I 6.36% Senior Notes due 2020 and for general corporate purposes, including capital expenditures.
Schedule of Debt Redeemed
In 2020, the following debt was redeemed:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricMarchSenior Notes4.89%2020$300 
DTE ElectricJulySenior Notes5.63%202032 
DTE ElectricJulySenior Notes3.45%2020300 
DTE GasSeptemberSenior Notes6.36%202050 
$682 
v3.20.2
Short-Term Credit Arrangements and Borrowings (Tables)
 9 Months Ended
Sep. 30, 2020
Short-term Debt [Abstract]  
Schedule of Line of Credit Facilities
The availability under these facilities as of September 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 202383 — — 83 
Unsecured revolving credit facility, expiring April 20241,500 500 300 2,300 
2,510 900 400 3,810 
Amounts outstanding at September 30, 2020
Letters of credit212 — — 212 
Unsecured term loan667 200 100 967 
Revolver borrowings21 — — 21 
900 200 100 1,200 
Net availability at September 30, 2020$1,610 $700 $300 $2,610 
v3.20.2
Leases (Tables)
 9 Months Ended
Sep. 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
September 30, 2020
(In millions)
2020$8 
202124 
202220 
202319 
202419 
2025 and Thereafter273 
Total minimum future lease receipts363 
Residual value of leased pipeline19 
Less unearned income201 
Net investment in finance lease181 
Less current portion10 
$171 
Schedule of Lease Income Associated with Operating Leases
DTE Energy’s lease income associated with operating leases was as follows:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Fixed payments$17 $17 $50 $51 
Variable payments43 40 82 92 
$60 $57 $132 $143 
v3.20.2
Retirement Benefits and Trusteed Assets (Tables)
 9 Months Ended
Sep. 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 September 30,
2020201920202019
(In millions)
Service cost$25 $21 $7 $5 
Interest cost46 55 14 18 
Expected return on plan assets(84)(82)(32)(30)
Amortization of:
Net actuarial loss43 33 4 3 
Prior service credit— — (5)(3)
Settlements2 — — — 
Net periodic benefit cost (credit)$32 $27 $(12)$(7)
Pension BenefitsOther Postretirement Benefits
Nine Months Ended September 30,
2020201920202019
(In millions)
Service cost$74 $63 $20 $16 
Interest cost139 164 42 53 
Expected return on plan assets(250)(244)(96)(92)
Amortization of:
Net actuarial loss129 99 12 9 
Prior service credit— — (15)(7)
Settlements2 — — — 
Net periodic benefit cost (credit)$94 $82 $(37)$(21)
The following tables detail the components of net periodic benefit costs (credits) for other postretirement benefits for DTE Electric:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)(In millions)
Service cost$5 $4 $15 $12 
Interest cost11 13 32 40 
Expected return on plan assets(21)(21)(65)(63)
Amortization of:
Net actuarial loss2 1 8 3 
Prior service credit(3)(1)(10)(5)
Net periodic benefit credit$(6)$(4)$(20)$(13)
Schedule of the Contribution of Common Stock to the DTE Energy Company Affiliates Employee Benefit Plans Master Trust Details of the contribution of common stock to the DTE Energy Company Affiliates Employee Benefit Plans Master Trust are as follows:
DateNumber of SharesPrice per ShareAmount
(In millions)
September 8, 2020694,444$118.08 $82 
v3.20.2
Segment and Related Information (Tables)
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Electric$16 $16 $46 $43 
Gas4 3 12 8 
Gas Storage and Pipelines8 11 17 17 
Power and Industrial Projects134 160 308 462 
Energy Trading9 4 23 16 
Corporate and Other1 1 2 2 
$172 $195 $408 $548 
Financial data of DTE Energy's business segments follows:
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
Electric$1,690 $1,520 $4,211 $3,945 
Gas173 155 964 1,043 
Operating Revenues — Non-utility operations
Electric3 — 10 — 
Gas Storage and Pipelines204 126 546 363 
Power and Industrial Projects324 406 850 1,196 
Energy Trading1,061 1,105 2,714 3,519 
Corporate and Other1 2 2 3 
Reconciliation and Eliminations(172)(195)(408)(548)
Total$3,284 $3,119 $8,889 $9,521 
Three Months Ended September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Net Income (Loss) Attributable to DTE Energy by Segment:
Electric$398 $307 $675 $587 
Gas(20)(38)102 121 
Gas Storage and Pipelines104 60 246 158 
Power and Industrial Projects47 49 102 104 
Energy Trading(28)(14)5 12 
Corporate and Other(25)(45)(37)(80)
Net Income Attributable to DTE Energy Company$476 $319 $1,093 $902 
v3.20.2
Related Party Transactions (Tables)
 9 Months Ended
Sep. 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 September 30,Nine Months Ended September 30,
2020201920202019
(In millions)
Operating Revenues — Utility operations
DTE Gas$8 $8 $24 $24 
Fuel, purchased power, and gas — utility
DTE Electric$2 $2 $6 $6 
DTE Gas$2 $2 $14 $15 
Fuel, purchased power, and gas — non-utility
DTE Energy Trading$7 $2 $20 $5 
v3.20.2
Organization and Basis of Presentation (Details Textuals)
customer in Millions
Sep. 30, 2020
USD ($)
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
 8 Months Ended 9 Months Ended
Dec. 31, 2019
Sep. 30, 2020
ASSETS    
Cash and cash equivalents $ 93 $ 945
Accounts receivable 1,642 1,419
Property, plant, and equipment, net 25,317 27,159
Goodwill 2,464 2,465
Total Assets 41,882 44,439
LIABILITIES    
Short-term borrowings 828 988
Total    
ASSETS    
Cash and cash equivalents 27 55
Accounts receivable 27 25
Inventories 74 102
Property, plant, and equipment, net 443 429
Goodwill 25 25
Intangible assets 542 531
Other current and long-term assets 2 20
Total Assets 1,140 1,187
LIABILITIES    
Accounts payable and accrued current liabilities 15 19
Short-term borrowings 0 21
Other current and long-term liabilities 14 10
Total liabilities 29 50
SGG    
ASSETS    
Cash and cash equivalents 16 33
Accounts receivable 8 7
Inventories 0 0
Property, plant, and equipment, net 410 404
Goodwill 25 25
Intangible assets 542 531
Other current and long-term assets 2 1
Total Assets 1,003 1,001
LIABILITIES    
Accounts payable and accrued current liabilities 2 0
Short-term borrowings 0 0
Other current and long-term liabilities 7 6
Total liabilities $ 9 $ 6
VIE ownership and non-ownership percentage   100.00%
VIE ownership percentage 85.00% 85.00%
Other    
ASSETS    
Cash and cash equivalents $ 11 $ 22
Accounts receivable 19 18
Inventories 74 102
Property, plant, and equipment, net 33 25
Goodwill 0 0
Intangible assets 0 0
Other current and long-term assets 0 19
Total Assets 137 186
LIABILITIES    
Accounts payable and accrued current liabilities 13 19
Short-term borrowings 0 21
Other current and long-term liabilities 7 4
Total liabilities $ 20 $ 44
v3.20.2
Organization and Basis of Presentation (Non-Consolidated Variable Interest Entities) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Variable Interest Entity [Line Items]    
Investments in equity method investees $ 1,865 $ 1,862
Notes receivable 255 202
Variable interest entity, non-consolidated    
Variable Interest Entity [Line Items]    
Investments in equity method investees 1,505 1,503
Notes receivable 40 21
Future funding commitments $ 36 $ 63
v3.20.2
Significant Accounting Policies (Other Income) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Other Nonoperating Income, by Component [Line Items]        
Equity earnings of equity method investees $ 37 $ 34 $ 96 $ 77
Income from REF entities 43 40 95 96
Gains from equity and fixed income securities 2 3 24 27
Contract services 7 7 20 21
Gas Storage and Pipelines post-acquisition settlement 20 0 20 0
Allowance for equity funds used during construction 6 5 19 18
Other 5 9 12 20
Total other income 120 98 286 259
DTE Electric        
Schedule of Other Nonoperating Income, by Component [Line Items]        
Gains from equity and fixed income securities 2 3 24 27
Contract services 7 7 20 23
Allowance for equity funds used during construction 6 5 18 17
Other 3 5 6 11
Total other income $ 18 $ 20 $ 68 $ 78
v3.20.2
Significant Accounting Policies (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Mar. 31, 2020
Jun. 30, 2019
Mar. 31, 2019
Significant Accounting Policies [Line Items]                    
Reclassification of income tax effects $ 12,488 $ 11,892 $ 10,904 $ 12,488 $ 10,904 $ 11,836 $ 10,717 $ 11,988 $ 10,569 $ 11,020
Implementation of ASU           us-gaap:AccountingStandardsUpdate201802Member us-gaap:AccountingStandardsUpdate201802Member      
Effective tax rate increase (decrease) (1.00%)     (2.00%)            
Amortization of TCJA regulatory liability 2.00%     2.00%            
Annual production tax credit increase (decrease) (1.00%)     (3.00%)            
Carryback of 2018 net operating loss due to the CARES Act       3.00%            
Unrecognized compensation cost $ 84     $ 84            
Recognition period (in years)       1 year 4 months 28 days            
Uncollectible expense adjusted for regulatory deferrals 22   28 $ 70 81          
CARES Act                    
Significant Accounting Policies [Line Items]                    
Reduction in Income Tax Expense due to carryback of 2018 net operating loss to 2013       34            
Claim for employee retention credits   6                
Deferral of employer payroll taxes       $ 32            
CARES Act, AMT Credit Refund                    
Significant Accounting Policies [Line Items]                    
AMT credit received from U.S. Treasury 220                  
Immediate Refund of 2018 Remaining AMT Credit Balance                    
Significant Accounting Policies [Line Items]                    
AMT credit received from U.S. Treasury 153                  
Immediate Refund of AMT Credit Generated by Carrying Back 2018 Net Operating Loss to 2013                    
Significant Accounting Policies [Line Items]                    
AMT credit received from U.S. Treasury $ 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, threshold duration       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) (3.00%)     (4.00%)            
Amortization of TCJA regulatory liability 3.00%     3.00%            
Annual production tax credit increase (decrease)       1.00%            
Uncollectible expense adjusted for regulatory deferrals $ 16   17 $ 42 47          
DTE Electric | COVID-19 Pandemic                    
Significant Accounting Policies [Line Items]                    
Uncollectible expense deferred as a Regulatory asset (1)     5            
DTE Electric | CARES Act                    
Significant Accounting Policies [Line Items]                    
Claim for employee retention credits   3                
Deferral of employer payroll taxes       17            
DTE Electric | DTE Energy                    
Significant Accounting Policies [Line Items]                    
Income tax payable 5     5            
Income tax receivable           $ 14        
Allocated costs 12   9 28 33          
DTE Gas | COVID-19 Pandemic                    
Significant Accounting Policies [Line Items]                    
Uncollectible expense deferred as a Regulatory asset (1)     1            
Accumulated Other Comprehensive Income (Loss)                    
Significant Accounting Policies [Line Items]                    
Reclassification of income tax effects (138) (141) (146) (138) (146) (148) $ (120) (145) (146) (143)
Retained Earnings                    
Significant Accounting Policies [Line Items]                    
Reclassification of income tax effects $ 7,092 $ 6,618 $ 6,516 $ 7,092 $ 6,516 $ 6,587 6,112 $ 6,732 $ 6,198 $ 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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Schedule of Income Taxes [Line Items]        
Effective Tax Rate 12.00% 13.00% 10.00% 12.00%
DTE Electric        
Schedule of Income Taxes [Line Items]        
Effective Tax Rate 13.00% 16.00% 12.00% 16.00%
v3.20.2
Significant Accounting Policies (Financing Receivables Classified by Internal Grade of Credit Risk) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Notes receivable  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 $ 60
2019 37
2018 and prior 15
Total 112
Notes receivable | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 0
2019 18
2018 and prior 9
Total 27
Notes receivable | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 60
2019 19
2018 and prior 6
Total 85
Net investment in leases  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 140
2019 0
2018 and prior 41
Total 181
Net investment in leases | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
2020 8
2019 0
2018 and prior 40
Total 48
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 18
DTE Electric | Notes receivable | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 18
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
 9 Months Ended
Sep. 30, 2020
USD ($)
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance $ 91
Current period provision 75
Write-offs charged against allowance (120)
Recoveries of amounts previously written off 41
Ending balance 87
Trade accounts receivable  
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 87
Current period provision 73
Write-offs charged against allowance (117)
Recoveries of amounts previously written off 41
Ending balance 84
Other receivables  
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 4
Current period provision 2
Write-offs charged against allowance (3)
Recoveries of amounts previously written off 0
Ending balance 3
DTE Electric  
Financing Receivable, Allowance for Credit Loss [Roll Forward]  
Beginning balance 46
Current period provision 47
Write-offs charged against allowance (68)
Recoveries of amounts previously written off 24
Ending balance $ 49
v3.20.2
Acquisitions (Details Textuals)
$ in Millions
 1 Months Ended 3 Months Ended 9 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 ($)
Dec. 31, 2019
USD ($)
Sep. 30, 2020
USD ($)
Jun. 30, 2020
USD ($)
Mar. 31, 2020
USD ($)
Sep. 30, 2019
USD ($)
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Business Acquisition [Line Items]                            
Consideration paid for entity acquired, paid in cash                         $ 126 $ 174
Goodwill           $ 2,464 $ 2,465           2,465  
Operating Revenues — Non-utility operations             1,440     $ 1,463     3,770 4,584
Net Income             477 $ 277 $ 342 $ 317 $ 179 $ 408 1,096 $ 904
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                      
Accretion expense related to liability for contingent consideration payment             1           5  
Payment of consideration upon achievement of final milestone $ 385                          
Number of equal payment installments made upon achievement of final milestone | installment 2                          
Remaining cash consideration paid and held in escrow     14                      
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 | 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
Sep. 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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Disaggregation of Revenue [Line Items]        
Revenues $ 3,284 $ 3,119 $ 8,889 $ 9,521
Lease revenue outside scope of Topic 606 60 57 132 143
Electric        
Disaggregation of Revenue [Line Items]        
Revenues 1,693 1,520 4,221 3,945
Other revenues outside scope of topic 606 8 5 18 14
Electric | Residential        
Disaggregation of Revenue [Line Items]        
Revenues 900 791 2,169 1,839
Electric | Commercial        
Disaggregation of Revenue [Line Items]        
Revenues 498 515 1,313 1,358
Electric | Industrial        
Disaggregation of Revenue [Line Items]        
Revenues 157 175 434 497
Electric | Other        
Disaggregation of Revenue [Line Items]        
Revenues 138 39 305 251
Electric | Other | DTE Sustainable Generation        
Disaggregation of Revenue [Line Items]        
Revenues 3   10  
Gas        
Disaggregation of Revenue [Line Items]        
Revenues 173 155 964 1,043
Other revenues outside scope of topic 606 2 2 7 6
Alternative Revenue Program revenues outside scope of Topic 606     2  
Gas | Other        
Disaggregation of Revenue [Line Items]        
Revenues 32 18 98 102
Gas | Gas sales        
Disaggregation of Revenue [Line Items]        
Revenues 92 87 655 727
Gas | End User Transportation        
Disaggregation of Revenue [Line Items]        
Revenues 34 35 154 157
Gas | Intermediate Transportation        
Disaggregation of Revenue [Line Items]        
Revenues 15 15 57 57
Gas Storage and Pipelines        
Disaggregation of Revenue [Line Items]        
Revenues 204 126 546 363
Lease revenue outside scope of Topic 606 2 2 7 7
Power and Industrial Projects        
Disaggregation of Revenue [Line Items]        
Revenues 324 406 850 1,196
Lease revenue outside scope of Topic 606 26 33 74 94
Energy Trading        
Disaggregation of Revenue [Line Items]        
Revenues 1,061 1,105 2,714 3,519
Gain (loss) on derivative outside scope of Topic 606 $ 731 $ 791 $ 1,800 $ 2,600
v3.20.2
Revenue (Deferred Revenue) (Details)
$ in Millions
 9 Months Ended
Sep. 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 39
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (42)
Ending Balance $ 72
v3.20.2
Revenue (Expected Recognition of Deferred Revenue) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 72
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 3 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 $ 36
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 $ 12
Remaining performance obligation, expected timing of satisfaction
v3.20.2
Revenue (Expected Timing of Performance Obligation Satisfaction) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 72
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 7
Remaining performance obligation, expected timing of satisfaction 3 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 $ 36
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 $ 12
Remaining performance obligation, expected timing of satisfaction
Fixed-price Contract  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 1,669
Fixed-price Contract | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation 32
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 72
Remaining performance obligation, expected timing of satisfaction 3 months
Fixed-price Contract | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-10-01 | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 2
Remaining performance obligation, expected timing of satisfaction 3 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 $ 350
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 $ 294
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 $ 231
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 $ 142
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 $ 8
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 $ 580
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 $ 0
Remaining performance obligation, expected timing of satisfaction
v3.20.2
Regulatory Matters (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 17, 2020
May 08, 2020
Nov. 25, 2019
Jul. 08, 2019
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2020
Dec. 31, 2020
Jul. 09, 2020
DTE Electric | COVID-19 Pandemic                  
Public Utilities, General Disclosures [Line Items]                  
Uncollectible expense deferred as a Regulatory asset         $ (1)   $ 5    
DTE Electric | COVID-19 Pandemic | Forecast                  
Public Utilities, General Disclosures [Line Items]                  
Proposed regulatory liability               $ 30  
DTE Electric | MPSC | 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              
Regulatory liability for non-plant-related accumulated deferred income tax balances that resulted from the TCJA, accelerated amortization approved                 $ 102
DTE Gas | COVID-19 Pandemic                  
Public Utilities, General Disclosures [Line Items]                  
Uncollectible expense deferred as a Regulatory asset         $ (1)   $ 1    
DTE Gas | MPSC | 2019 Gas Rate Case Filing                  
Public Utilities, General Disclosures [Line Items]                  
Requested rate increase     $ 204            
Return on equity percent 9.90%   10.00%            
Return on equity requested percent     10.50%            
Approved rate increase $ 110                
Disallowed cost, capital expenditures related to incentive compensation           $ 14      
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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Basic Earnings per Share        
Net Income Attributable to DTE Energy Company $ 476 $ 319 $ 1,093 $ 902
Less: Allocation of earnings to net restricted stock awards 1 1 2 2
Net income available to common shareholders — basic $ 475 $ 318 $ 1,091 $ 900
Average number of common shares outstanding — basic (in shares) 193.0 183.0 192.0 183.0
Basic Earnings per Common Share (in dollars per share) $ 2.47 $ 1.74 $ 5.67 $ 4.93
Diluted Earnings per Share        
Net Income Attributable to DTE Energy Company $ 476 $ 319 $ 1,093 $ 902
Less: Allocation of earnings to net restricted stock awards 1 1 2 2
Net income available to common shareholders — diluted $ 475 $ 318 $ 1,091 $ 900
Average number of common shares outstanding — basic (in shares) 193.0 183.0 192.0 183.0
Incremental shares attributable to:        
Average dilutive equity units, performance share awards, and stock options (in shares) 0.0 1.0 1.0 1.0
Average number of common shares outstanding — diluted (in shares) 193.0 184.0 193.0 184.0
Diluted Earnings per Common Share (in dollars per share) $ 2.46 $ 1.73 $ 5.66 $ 4.91
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
Sep. 30, 2020
Dec. 31, 2019
Derivative assets    
Derivative assets, gross $ 580 $ 775
Derivative asset, netting (486) (601)
Derivative assets, net 94 174
Derivative liabilities    
Derivative liabilities, gross (564) (770)
Derivative liability, netting 460 601
Derivative liabilities, net (104) (169)
Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (421) (596)
Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (143) (174)
Natural gas    
Derivative assets    
Derivative assets, gross 240 355
Derivative asset, netting (194) (266)
Derivative assets, net 46 89
Derivative liabilities    
Derivative liabilities, gross (265) (351)
Derivative liability, netting 185 266
Derivative liabilities, net (80) (85)
Electricity    
Derivative assets    
Derivative assets, gross 137 306
Derivative asset, netting (106) (225)
Derivative assets, net 31 81
Derivative liabilities    
Derivative liabilities, gross (126) (298)
Derivative liability, netting 104 225
Derivative liabilities, net (22) (73)
Environmental & Other    
Derivative assets    
Derivative assets, gross 201 113
Derivative asset, netting (186) (110)
Derivative assets, net 15 3
Derivative liabilities    
Derivative liabilities, gross (171) (121)
Derivative liability, netting 171 110
Derivative liabilities, net 0 (11)
Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 2 1
Derivative asset, netting 0 0
Derivative assets, net 2 1
Derivative liabilities    
Derivative liabilities, gross (2) 0
Derivative liability, netting 0 0
Derivative liabilities, net (2) 0
Recurring    
Assets    
Cash equivalents 567 15
Derivative assets    
Derivative asset, netting (486) (601)
Derivative assets, net 94 174
Total assets 2,478 2,073
Derivative liabilities    
Derivative liability, netting 460 601
Derivative liabilities, net (104) (169)
Net Assets (Liabilities) at end of period 2,374 1,904
Net Assets at end of period, netting (26) 0
Recurring | DTE Electric    
Assets    
Cash equivalents 175 11
Derivative assets    
Total assets 1,871 1,688
Recurring | Current assets    
Derivative assets    
Derivative asset, netting (379) (513)
Total assets 632 148
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 182 14
Recurring | Noncurrent assets    
Derivative assets    
Derivative asset, netting (107) (88)
Total assets 1,846 1,925
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,689 1,674
Recurring | Current liabilities    
Derivative liabilities    
Derivative liability, netting 361 513
Derivative liabilities, net (60) (83)
Recurring | Noncurrent liabilities    
Derivative liabilities    
Derivative liability, netting 99 88
Derivative liabilities, net (44) (86)
Recurring | Cash and cash equivalents    
Assets    
Cash equivalents 565 4
Recurring | Cash and cash equivalents | DTE Electric    
Assets    
Cash equivalents 175  
Recurring | Restricted cash    
Assets    
Cash equivalents 2  
Recurring | Other    
Assets    
Cash equivalents   11
Recurring | Other | DTE Electric    
Assets    
Cash equivalents   11
Recurring | Natural gas    
Derivative assets    
Derivative asset, netting (194) (266)
Derivative assets, net 46 89
Derivative liabilities    
Derivative liability, netting 185 266
Derivative liabilities, net (80) (85)
Recurring | Electricity    
Derivative assets    
Derivative asset, netting (106) (225)
Derivative assets, net 31 81
Derivative liabilities    
Derivative liability, netting 104 225
Derivative liabilities, net (22) (73)
Recurring | Environmental & Other    
Derivative assets    
Derivative asset, netting (186) (110)
Derivative assets, net 15 3
Derivative liabilities    
Derivative liability, netting 171 110
Derivative liabilities, net 0 (11)
Recurring | Foreign currency exchange contracts    
Derivative assets    
Derivative asset, netting 0 0
Derivative assets, net 2 1
Derivative liabilities    
Derivative liability, netting 0 0
Derivative liabilities, net (2) 0
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 7 3
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 46 34
Other investments 98 4
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 46 34
Other investments 11 0
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 78 43
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 78 43
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 1,013 1,046
Other investments 49 140
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,013 1,046
Other investments 14 13
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 527 538
Other investments 6 79
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 527 538
Recurring | Level 1    
Assets    
Cash equivalents 567 15
Derivative assets    
Derivative assets, gross 126 205
Total assets 1,886 1,683
Derivative liabilities    
Derivative liabilities, gross (121) (221)
Net Assets (Liabilities) at end of period 1,765 1,462
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 175 11
Derivative assets    
Total assets 1,240 1,264
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 679 218
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 175 11
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,207 1,465
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,065 1,253
Recurring | Level 1 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (112) (211)
Recurring | Level 1 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (9) (10)
Recurring | Level 1 | Natural gas    
Derivative assets    
Derivative assets, gross 126 205
Derivative liabilities    
Derivative liabilities, gross (118) (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 46 34
Other investments 98 4
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 46 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 872 1,046
Other investments 49 140
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 872 1,046
Other investments 14 13
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 122 160
Other investments 6 79
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 122 160
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 371 410
Total assets 696 788
Derivative liabilities    
Derivative liabilities, gross (333) (393)
Net Assets (Liabilities) at end of period 363 395
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 325 378
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 273 320
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 423 468
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 325 378
Recurring | Level 2 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (243) (300)
Recurring | Level 2 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (90) (93)
Recurring | Level 2 | Natural gas    
Derivative assets    
Derivative assets, gross 72 76
Derivative liabilities    
Derivative liabilities, gross (66) (41)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 103 223
Derivative liabilities    
Derivative liabilities, gross (97) (231)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 194 110
Derivative liabilities    
Derivative liabilities, gross (168) (121)
Recurring | Level 2 | Foreign currency exchange contracts    
Derivative assets    
Derivative assets, gross 2 1
Derivative liabilities    
Derivative liabilities, gross (2) 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 325 378
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 325 378
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 83 160
Total assets 83 160
Derivative liabilities    
Derivative liabilities, gross (110) (156)
Net Assets (Liabilities) at end of period (27) 4
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 7 3
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 59 123
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 7 3
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 24 37
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Derivative liabilities    
Derivative liabilities, gross (66) (85)
Recurring | Level 3 | Noncurrent liabilities    
Derivative liabilities    
Derivative liabilities, gross (44) (71)
Recurring | Level 3 | Natural gas    
Derivative assets    
Derivative assets, gross 42 74
Derivative liabilities    
Derivative liabilities, gross (81) (89)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 34 83
Derivative liabilities    
Derivative liabilities, gross (29) (67)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 7 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 7 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 299 43
Derivative liabilities    
Net Assets (Liabilities) at end of period 299 43
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 299 43
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 299 43
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 299 43
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 78 43
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 78 $ 43
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 141  
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 141  
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 80  
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 80  
v3.20.2
Fair Value (Details Textuals) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2020
Dec. 31, 2019
Nuclear decommissioning trust fund | Fixed income securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities with no contractual maturity date $ 80  
Equity or debt securities | Minimum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, redemption notice period 7 days  
Equity or debt securities | Maximum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, redemption notice period 65 days  
Private equity and other    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Unfunded commitments related to investments classified as NAV assets $ 192 $ 151
Private equity and other | Minimum    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments classified as NAV assets, general contractual durations 7 years  
Private equity and other | 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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 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 $ 46 $ 9 $ 4 $ (44)
Transfers from Level 3 into Level 2 (1) 0 (5) 0
Total gains (losses)        
Included in earnings (42) 2 39 42
Recorded in/Change in fair value recorded in Regulatory liabilities 9 (3) 21 3
Purchases, issuances, and settlements        
Settlements (39) (36) (86) (29)
Net Assets (Liabilities) as of end of period (27) (28) (27) (28)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019 (47) (22) 16 6
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 10 9 3 6
Total gains (losses)        
Recorded in/Change in fair value recorded in Regulatory liabilities 9 (3) 21 3
Purchases, issuances, and settlements        
Settlements (12) (1) (17) (4)
Net Assets (Liabilities) as of end of period 7 5 7 5
The amount of total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets held at September 30, 2020 and 2019 and reflected in DTE Electric's Consolidated Statements of Financial Position 0 (1) 7 5
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 20 (10) (15) (49)
Transfers from Level 3 into Level 2 (1) 0 (5) 0
Total gains (losses)        
Included in earnings (80) (35) (44) (4)
Recorded in/Change in fair value recorded in Regulatory liabilities 0 0 0 0
Purchases, issuances, and settlements        
Settlements 22 4 25 12
Net Assets (Liabilities) as of end of period (39) (41) (39) (41)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019 (57) (36) (20) (20)
Electricity        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period 16 10 16 (2)
Transfers from Level 3 into Level 2 0 0 0 0
Total gains (losses)        
Included in earnings 37 37 90 47
Recorded in/Change in fair value recorded in Regulatory liabilities 0 0 0 0
Purchases, issuances, and settlements        
Settlements (48) (39) (101) (37)
Net Assets (Liabilities) as of end of period 5 8 5 8
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019 11 15 53 32
Other        
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]        
Net Assets (Liabilities) as of beginning of period 10 9 3 7
Transfers from Level 3 into Level 2 0 0 0 0
Total gains (losses)        
Included in earnings 1 0 (7) (1)
Recorded in/Change in fair value recorded in Regulatory liabilities 9 (3) 21 3
Purchases, issuances, and settlements        
Settlements (13) (1) (10) (4)
Net Assets (Liabilities) as of end of period 7 5 7 5
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at September 30, 2020 and 2019 $ (1) $ (1) $ (17) $ (6)
v3.20.2
Fair Value (Unobservable Inputs related to Level 3 Assets and Liabilities) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
MWh
MMBTU
Dec. 31, 2019
USD ($)
MMBTU
MWh
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets $ 580 $ 775
Derivative Liabilities (564) (770)
Recurring | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 83 160
Derivative Liabilities (110) (156)
Natural gas    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 240 355
Derivative Liabilities (265) (351)
Natural gas | Recurring | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 42 74
Derivative Liabilities (81) (89)
Electricity    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 137 306
Derivative Liabilities (126) (298)
Electricity | Recurring | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Derivative Assets 34 83
Derivative Liabilities $ (29) $ (67)
Forward basis price | Natural gas | Minimum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MMBTU (1.10) (1.78)
Forward basis price | Natural gas | Maximum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MMBTU 2.30 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 (9) (10)
Forward basis price | Electricity | Maximum | Discounted Cash Flow | Level 3    
Unobservable Inputs Valuation Techniques [Line Items]    
Forward basis price | MWh 6 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
Sep. 30, 2020
Dec. 31, 2019
Carrying amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other $ 112 $ 184
Short-term borrowings 988 828
Notes payable — Other 19 25
Long-term debt 18,660 16,606
Carrying amount | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other 18 9
Short-term borrowings 200 354
Notes payable — Other 17 21
Long-term debt 8,235 7,180
Carrying amount | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings 104 97
Fair value | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other 0 0
Short-term borrowings 0 0
Notes payable — Other 0 0
Long-term debt 2,398 2,572
Fair value | Level 1 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other 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 0 0
Short-term borrowings 988 828
Notes payable — Other 0 0
Long-term debt 17,213 14,207
Fair value | Level 2 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other 0 0
Short-term borrowings 200 354
Notes payable — Other 0 0
Long-term debt 9,565 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 112 184
Short-term borrowings 0 0
Notes payable — Other 19 25
Long-term debt 1,406 1,252
Fair value | Level 3 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable — Other 18 9
Short-term borrowings 0 0
Notes payable — Other 17 21
Long-term debt 194 173
Fair value | Level 3 | DTE Electric | Affiliates    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings $ 104 $ 97
v3.20.2
Fair Value (Fair Value of Nuclear Decommissioning Trust Fund Assets) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds $ 1,664 $ 1,661
DTE Electric    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 1,664 1,661
DTE Electric | Nuclear decommissioning trust fund    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 1,664 1,661
DTE Electric | Nuclear decommissioning trust fund | Fermi 2    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 1,652 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 $ 9 $ 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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Debt Securities, Available-for-sale [Line Items]        
Realized gains $ 38 $ 15 $ 172 $ 43
Realized losses (11) (8) (103) (25)
Proceeds from sale of securities $ 816 $ 198 $ 2,054 $ 594
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
Sep. 30, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]    
Fair Value $ 1,664 $ 1,661
Fixed income securities, fair value 527 538
Private equity and other, fair value 78 43
Cash equivalents, fair value 46 34
Unrealized Gains 341 420
Fixed income securities, unrealized gains 16 24
Unrealized Losses (29) (40)
Fixed income securities, unrealized losses (1) (1)
Equity securities    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 1,013 1,046
Unrealized Gains 325 396
Unrealized Losses $ (28) $ (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
Sep. 30, 2020
USD ($)
Debt Securities, Available-for-sale [Line Items]  
Due within one year $ 92
Due after one through five years 82
Due after five through ten years 79
Due after ten years 194
Available-for-sale securities total $ 447
v3.20.2
Fair Value (Gains (Losses) Related to the Trust) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Rabbi Trust        
Schedule of Investments [Line Items]        
Gains (losses) related to the Trust $ 2 $ 3 $ (7) $ 27
Equity securities        
Schedule of Investments [Line Items]        
Gains (losses) related to the Trust 2 1 (4) 18
Fixed income securities        
Schedule of Investments [Line Items]        
Gains (losses) related to the Trust $ 0 $ 2 $ (3) $ 9
v3.20.2
Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 580 $ 775
Derivative Liabilities (564) (770)
Current derivative assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 444 646
Current derivative liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (421) (596)
Noncurrent derivative assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets 136 129
Noncurrent derivative liabilities    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (143) (174)
Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 2 1
Derivative Liabilities (2) 0
Natural gas    
Derivatives, Fair Value [Line Items]    
Derivative Assets 240 355
Derivative Liabilities (265) (351)
Electricity    
Derivatives, Fair Value [Line Items]    
Derivative Assets 137 306
Derivative Liabilities (126) (298)
Environmental & Other    
Derivatives, Fair Value [Line Items]    
Derivative Assets 201 113
Derivative Liabilities (171) (121)
Derivatives designated as hedging instruments | Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 0 0
Derivative Liabilities (1) 0
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative Assets 580 775
Derivative Liabilities (563) (770)
Derivatives not designated as hedging instruments | DTE Electric    
Derivatives, Fair Value [Line Items]    
Derivative Assets 7 3
Derivatives not designated as hedging instruments | Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 2 1
Derivative Liabilities (1) 0
Derivatives not designated as hedging instruments | Natural gas    
Derivatives, Fair Value [Line Items]    
Derivative Assets 240 355
Derivative Liabilities (265) (351)
Derivatives not designated as hedging instruments | Electricity    
Derivatives, Fair Value [Line Items]    
Derivative Assets 137 306
Derivative Liabilities (126) (298)
Derivatives not designated as hedging instruments | Environmental & Other    
Derivatives, Fair Value [Line Items]    
Derivative Assets 201 113
Derivative Liabilities (171) (121)
Derivatives not designated as hedging instruments | FTRs — Other current assets | DTE Electric    
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 7 $ 3
v3.20.2
Financial and Other Derivative Instruments (Details Textuals) - USD ($)
Sep. 30, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Letters of credit that could be used to offset net derivative liabilities $ 5,000,000 $ 6,000,000
Letters of credit received that could be used to offset net derivative assets 1,000,000 $ 4,000,000
Contractual obligation to post collateral in event of downgrade to below investment grade 377,000,000  
Derivative net liability position aggregate fair value 472,000,000  
Collateral already posted fair value 0  
Derivative net asset position, fair value 445,000,000  
Remaining amount of offsets to derivative net liability positions for hard and soft trigger provisions $ 27,000,000  
v3.20.2
Financial and Other Derivative Instruments (Net Cash Collateral Offsetting Arrangements) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Cash collateral netted against Derivative assets $ (26) $ 0
Cash collateral recorded in Accounts receivable 12 13
Cash collateral recorded in Accounts payable (2) (3)
Total net cash collateral posted (received) $ (16) $ 10
v3.20.2
Financial and Other Derivative Instruments (Netting Offsets of Derivative Assets and Liabilities) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) $ 580 $ 775
Gross Amounts Offset in the Consolidated Statements of Financial Position (486) (601)
Derivative assets, net 94 174
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (564) (770)
Gross Amounts Offset in the Consolidated Statements of Financial Position 460 601
Derivative liabilities, net (104) (169)
Natural gas    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 240 355
Gross Amounts Offset in the Consolidated Statements of Financial Position (194) (266)
Derivative assets, net 46 89
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (265) (351)
Gross Amounts Offset in the Consolidated Statements of Financial Position 185 266
Derivative liabilities, net (80) (85)
Electricity    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 137 306
Gross Amounts Offset in the Consolidated Statements of Financial Position (106) (225)
Derivative assets, net 31 81
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (126) (298)
Gross Amounts Offset in the Consolidated Statements of Financial Position 104 225
Derivative liabilities, net (22) (73)
Environmental & Other    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 201 113
Gross Amounts Offset in the Consolidated Statements of Financial Position (186) (110)
Derivative assets, net 15 3
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (171) (121)
Gross Amounts Offset in the Consolidated Statements of Financial Position 171 110
Derivative liabilities, net 0 (11)
Foreign currency exchange contracts    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 2 1
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Derivative assets, net 2 1
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (2) 0
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Derivative liabilities, net $ (2) $ 0
v3.20.2
Financial and Other Derivative Instruments (Netting Offsets Reconciliation to Balance Sheet) (Details) - USD ($)
$ in Millions
Sep. 30, 2020
Dec. 31, 2019
Derivative Assets    
Derivative Assets $ 580 $ 775
Collateral adjustment (26) 0
Derivative assets, current 65 133
Derivative assets, noncurrent 29 41
Derivative Liabilities    
Derivative Liabilities (564) (770)
Derivative liabilities, current (60) (83)
Derivative liabilities, noncurrent (44) (86)
Current derivative assets    
Derivative Assets    
Derivative Assets 444 646
Counterparty netting (361) (513)
Collateral adjustment (18) 0
Derivative assets, current 65 133
Noncurrent derivative assets    
Derivative Assets    
Derivative Assets 136 129
Counterparty netting (99) (88)
Collateral adjustment (8) 0
Derivative assets, noncurrent 29 41
Current derivative liabilities    
Derivative Liabilities    
Derivative Liabilities (421) (596)
Counterparty netting 361 513
Collateral adjustment 0 0
Derivative liabilities, current (60) (83)
Noncurrent derivative liabilities    
Derivative Liabilities    
Derivative Liabilities (143) (174)
Counterparty netting 99 88
Collateral adjustment 0 0
Derivative liabilities, noncurrent $ (44) $ (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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives $ (45) $ (8) $ 0 $ 5
Natural gas | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives (27) (5) (63) 4
Natural gas | Fuel, purchased power, and gas — non-utility        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives (51) (47) 28 (7)
Electricity | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives 33 54 75 21
Environmental & Other | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives 2 (11) (40) (11)
Foreign currency exchange contracts | Operating Revenues — Non-utility operations        
Derivative Instruments, Gain (Loss) [Line Items]        
Gain (Loss) Recognized in Income on Derivatives $ (2) $ 1 $ 0 $ (2)
v3.20.2
Financial and Other Derivative Instruments (Cumulative Gross Volume of Derivative Contracts Outstanding) (Details)
 9 Months Ended
Sep. 30, 2020
CAD ($)
MWh
MMBTU
T
Natural gas (MMBtu)  
Derivative [Line Items]  
Commodity, energy measures | MMBTU 1,739,656,507
Electricity (MWh)  
Derivative [Line Items]  
Commodity, energy measures 28,258,929
Foreign currency exchange (CAD)  
Derivative [Line Items]  
Commodity, monetary measure | $ $ 154,336,963
Renewable Energy Certificates (MWh)  
Derivative [Line Items]  
Commodity, energy measures 7,893,076
Carbon emissions (Metric Ton)  
Derivative [Line Items]  
Commodity, mass measure | T 16,451,411
v3.20.2
Long-Term Debt (Schedule of Issued Debt) (Details)
 9 Months Ended
Sep. 30, 2020
USD ($)
Debt Instrument [Line Items]  
Debt issued $ 2,750,000,000
Repayment of debt $ 682,000,000
Senior Notes | August 2020 1.05% Mortgage Bonds Maturing 2025  
Debt Instrument [Line Items]  
Interest rate 1.05%
Debt issued $ 800,000,000
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
DTE Electric | Senior Notes | 6.36% Senior Notes Maturing 2020  
Debt Instrument [Line Items]  
Interest rate 6.36%
Repayment of debt $ 50,000,000
DTE Gas | Mortgage Bonds | August 2020 2.35% Mortgage Bonds Maturing 2030  
Debt Instrument [Line Items]  
Interest rate 2.35%
Debt issued $ 125,000,000
DTE Gas | Mortgage Bonds | August 2020 3.20% Mortgage Bonds Maturing 2050  
Debt Instrument [Line Items]  
Interest rate 3.20%
Debt issued $ 125,000,000
DTE Gas | Senior Notes | 6.36% Senior Notes Maturing 2020  
Debt Instrument [Line Items]  
Interest rate 6.36%
Repayment of debt $ 50,000,000
v3.20.2
Long-Term Debt (Details Textuals) - USD ($)
 1 Months Ended 7 Months Ended 9 Months Ended
Oct. 22, 2020
Oct. 27, 2020
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Mar. 31, 2020
Debt Instrument [Line Items]              
Face amount of loan     $ 2,750,000,000 $ 2,750,000,000      
Amount drawn down on loan       2,724,000,000 $ 1,433,000,000    
Repayment of debt       $ 682,000,000      
Unsecured Term Loan Maturing in March 2022 | Unsecured term loan              
Debt Instrument [Line Items]              
Face amount of loan             $ 200,000,000
Amount drawn down on loan     $ 0        
October 2020 4.375% Junior Subordinated Debentures Due 2080 | Junior Subordinated Debentures | Subsequent Event              
Debt Instrument [Line Items]              
Face amount of loan   $ 230,000,000          
Interest rate   4.375%          
Series C, 2012, 5.25% Junior Subordinated Debentures Due 2062 [Member] | Junior Subordinated Debentures | Subsequent Event              
Debt Instrument [Line Items]              
Interest rate 5.25%            
Repayment of debt $ 200,000,000            
October 2020 0.55% Senior Notes Maturing 2022 | Senior Notes | Subsequent Event              
Debt Instrument [Line Items]              
Face amount of loan   $ 750,000,000          
Interest rate   0.55%          
Unsecured term loan, expiring March 2021 | Unsecured term loan              
Debt Instrument [Line Items]              
Face amount of loan             $ 500,000,000
Unsecured term loan, expiring March 2021 | Unsecured term loan | Subsequent Event              
Debt Instrument [Line Items]              
Repayment of debt   $ 500,000,000          
Unsecured term loan, expiring June 2021 | Unsecured term loan              
Debt Instrument [Line Items]              
Face amount of loan           $ 167,000,000  
Unsecured term loan, expiring June 2021 | Unsecured term loan | Subsequent Event              
Debt Instrument [Line Items]              
Repayment of debt   $ 167,000,000          
v3.20.2
Long-Term Debt (Schedule of Debt Redeemed) (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2020
USD ($)
Debt Instrument, Redemption [Line Items]  
Debt redeemed $ 682
DTE Electric | Senior Notes | 4.89% Senior Notes Maturing 2020  
Debt Instrument, Redemption [Line Items]  
Interest rate 4.89%
Debt redeemed $ 300
DTE Electric | Senior Notes | 5.63% Senior Notes Maturing 2020  
Debt Instrument, Redemption [Line Items]  
Interest rate 5.63%
Debt redeemed $ 32
DTE Electric | Senior Notes | 3.45% Senior Notes Maturing 2020  
Debt Instrument, Redemption [Line Items]  
Interest rate 3.45%
Debt redeemed $ 300
DTE Electric | Senior Notes | 6.36% Senior Notes Maturing 2020  
Debt Instrument, Redemption [Line Items]  
Interest rate 6.36%
Debt redeemed $ 50
v3.20.2
Short-Term Credit Arrangements and Borrowings (Details Textuals)
 1 Months Ended 9 Months Ended
Oct. 27, 2020
USD ($)
Sep. 30, 2020
USD ($)
Sep. 30, 2020
CAD ($)
Jul. 31, 2020
USD ($)
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   $ 2,750,000,000              
Amounts drawn   988,000,000             $ 828,000,000
Maximum borrowing capacity   3,810,000,000              
Amounts outstanding   1,200,000,000              
Debt redeemed   682,000,000              
Unsecured term loan                  
Short-term Debt [Line Items]                  
Amounts outstanding   967,000,000              
Revolving credit facility                  
Short-term Debt [Line Items]                  
Amounts outstanding   21,000,000              
Letters of credit                  
Short-term Debt [Line Items]                  
Amounts outstanding   212,000,000              
Unsecured term loan, expiring March 2021 | Unsecured term loan                  
Short-term Debt [Line Items]                  
Face amount of loan               $ 500,000,000  
Amounts drawn   500,000,000              
Maximum borrowing capacity   500,000,000              
Unsecured term loan, expiring March 2021 | Unsecured term loan | Subsequent Event                  
Short-term Debt [Line Items]                  
Debt redeemed $ 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   83,000,000              
Unsecured term loan, expiring June 2021 | Unsecured term loan                  
Short-term Debt [Line Items]                  
Face amount of loan         $ 167,000,000        
Maximum borrowing capacity   167,000,000              
Unsecured term loan, expiring June 2021 | Unsecured term loan | Subsequent Event                  
Short-term Debt [Line Items]                  
Debt redeemed 167,000,000                
DTE Energy                  
Short-term Debt [Line Items]                  
Maximum borrowing capacity   2,510,000,000              
Amounts outstanding   $ 900,000,000              
Ratio of indebtedness to net capital   0.60 0.60            
DTE Energy | Unsecured term loan                  
Short-term Debt [Line Items]                  
Amounts outstanding   $ 667,000,000              
DTE Energy | Revolving credit facility                  
Short-term Debt [Line Items]                  
Amounts outstanding   21,000,000              
DTE Energy | Letters of credit                  
Short-term Debt [Line Items]                  
Amounts outstanding   212,000,000              
DTE Energy | Demand financing agreement                  
Short-term Debt [Line Items]                  
Maximum borrowing capacity, financing agreement   300,000,000              
Amount outstanding   43,000,000             $ 114,000,000
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   83,000,000              
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   59,000,000              
DTE Energy | Uncommitted letter of credit facility, Expiring July 2021 | Letters of credit                  
Short-term Debt [Line Items]                  
Maximum borrowing capacity       $ 50,000,000          
DTE Energy | Demand financing agreement, indefinite term | Demand financing agreement                  
Short-term Debt [Line Items]                  
Maximum borrowing capacity, financing agreement   100,000,000              
Maximum additional margin financing   50,000,000              
DTE Energy | Demand financing agreement, expiring in 2022 | Demand financing agreement                  
Short-term Debt [Line Items]                  
Maximum borrowing capacity, financing agreement   $ 150,000,000              
Maximum                  
Short-term Debt [Line Items]                  
Ratio of indebtedness to net capital   0.65 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   0.52 0.52            
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    
Amounts 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    
Amounts 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   0.49 0.49            
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    
Amounts drawn             $ 100,000,000    
Maximum borrowing capacity   100,000,000              
DTE Gas | Unsecured Term Loan, Expiring April 2021 | Unsecured term loan | Subsequent Event                  
Short-term Debt [Line Items]                  
Debt redeemed $ 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     $ 28,000,000            
v3.20.2
Short-Term Credit Arrangements and Borrowings (Details)
Sep. 30, 2020
USD ($)
Availability under combined facilities  
Maximum borrowing capacity $ 3,810,000,000
Amounts outstanding 1,200,000,000
Net availability 2,610,000,000
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 2,510,000,000
Amounts outstanding 900,000,000
Net availability 1,610,000,000
Letters of credit  
Availability under combined facilities  
Amounts outstanding 212,000,000
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 212,000,000
Unsecured term loan  
Availability under combined facilities  
Amounts outstanding 967,000,000
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 667,000,000
Revolver borrowings  
Availability under combined facilities  
Amounts outstanding 21,000,000
Revolver borrowings | DTE Electric  
Availability under combined facilities  
Amounts outstanding 0
Revolver borrowings | DTE Gas  
Availability under combined facilities  
Amounts outstanding 0
Revolver borrowings | DTE Energy  
Availability under combined facilities  
Amounts outstanding 21,000,000
Unsecured letter of credit facility, expiring in February 2021 | Letters of credit  
Availability under combined facilities  
Maximum borrowing capacity 150,000,000
Unsecured letter of credit facility, expiring in February 2021 | Letters of credit | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured letter of credit facility, expiring in February 2021 | Letters of credit | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured letter of credit facility, expiring in February 2021 | Letters of credit | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 150,000,000
Unsecured letter of credit facility, expiring in August 2021 | Letters of credit  
Availability under combined facilities  
Maximum borrowing capacity 110,000,000
Unsecured letter of credit facility, expiring in August 2021 | Letters of credit | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured letter of credit facility, expiring in August 2021 | Letters of credit | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured letter of credit facility, expiring in August 2021 | Letters of credit | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 110,000,000
Unsecured term loan, expiring in March 2021 | Unsecured term loan  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured term loan, expiring in March 2021 | Unsecured term loan | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan, expiring in March 2021 | Unsecured term loan | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan, expiring in March 2021 | Unsecured term loan | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured term loans, expiring in April 2021 | Unsecured term loan  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured term loans, expiring in April 2021 | Unsecured term loan | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 400,000,000
Unsecured term loans, expiring in April 2021 | Unsecured term loan | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 100,000,000
Unsecured term loans, expiring in April 2021 | Unsecured term loan | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan, expiring in June 2021 | Unsecured term loan  
Availability under combined facilities  
Maximum borrowing capacity 167,000,000
Unsecured term loan, expiring in June 2021 | Unsecured term loan | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan, expiring in June 2021 | Unsecured term loan | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured term loan, expiring in June 2021 | Unsecured term loan | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 167,000,000
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings  
Availability under combined facilities  
Maximum borrowing capacity 83,000,000
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 0
Unsecured Canadian revolving credit facility, expiring May 2023 | Revolver borrowings | DTE Energy  
Availability under combined facilities  
Maximum borrowing capacity 83,000,000
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings  
Availability under combined facilities  
Maximum borrowing capacity 2,300,000,000
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings | DTE Electric  
Availability under combined facilities  
Maximum borrowing capacity 500,000,000
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings | DTE Gas  
Availability under combined facilities  
Maximum borrowing capacity 300,000,000
Unsecured revolving credit facility, expiring April 2024 | Revolver borrowings | 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 9 Months Ended
Sep. 30, 2020
Jun. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Mar. 31, 2020
Leases [Abstract]            
Finance lease agreement, term (less than)   2 years        
Net investment in finance lease arrangement   $ 8        
Selling profit recognized   $ 11        
Net investment in finance lease arrangement           $ 133
Interest income recognized under finance leases $ 4   $ 2 $ 12 $ 4  
v3.20.2
Leases (Components of Net Investment in Finance Leases) (Details)
$ in Millions
Sep. 30, 2020
USD ($)
Leases [Abstract]  
2020 $ 8
2021 24
2022 20
2023 19
2024 19
2025 and Thereafter 273
Total minimum future lease receipts 363
Residual value of leased pipeline 19
Less unearned income 201
Net investment in finance lease 181
Less current portion 10
Net investment in finance lease, noncurrent $ 171
v3.20.2
Leases (Lease Income Associated with Operating Leases) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Leases [Abstract]        
Fixed payments $ 17 $ 17 $ 50 $ 51
Variable payments 43 40 82 92
Total lease income under operating leases $ 60 $ 57 $ 132 $ 143
v3.20.2
Commitments and Contingencies (Details Textuals)
$ in Millions
 1 Months Ended 9 Months Ended
Jul. 23, 2020
USD ($)
Jun. 30, 2020
Sep. 30, 2020
USD ($)
employee
site
facility
plant
May 31, 2020
plant
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        
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        
Synthetic fuel              
Loss Contingencies [Line Items]              
Number of days after expiration of statutes of limitations     90 days        
Maximum potential liability     $ 400        
Reduced emissions fuel guarantees              
Loss Contingencies [Line Items]              
Number of days after expiration of statutes of limitations     90 days        
Maximum potential liability     $ 543        
Other guarantees              
Loss Contingencies [Line Items]              
Maximum potential liability     50        
Performance surety bonds              
Loss Contingencies [Line Items]              
Performance bonds outstanding     $ 125        
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     $ 5        
DTE Gas | NEXUS pipeline              
Loss Contingencies [Line Items]              
Maximum potential liability     $ 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        
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     $ 52        
Vector | NEXUS pipeline              
Loss Contingencies [Line Items]              
Maximum potential liability     $ 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 power plants with requirement to retire, repower, refuel or retrofit units | plant       4      
Environmental capital expenditures     $ 2,400        
Number of former MGP sites | site     3        
Accrued for remediation     $ 6   $ 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        
DTE Electric | Workforce subject to collective bargaining arrangements | Labor force concentration risk              
Loss Contingencies [Line Items]              
Number of employees | employee     2,800        
DTE Electric | Performance surety bonds              
Loss Contingencies [Line Items]              
Performance bonds outstanding     $ 69        
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     $ 629        
DTE Electric | The Sierra Club              
Loss Contingencies [Line Items]              
Amount paid related to settlement $ 2            
DTE Gas              
Loss Contingencies [Line Items]              
Number of former MGP sites | site     14        
Accrued for remediation     $ 24   $ 25    
Amortization period (in years)     10 years        
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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Pension Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 25 $ 21 $ 74 $ 63
Interest cost 46 55 139 164
Expected return on plan assets (84) (82) (250) (244)
Amortization of net actuarial loss 43 33 129 99
Amortization of prior service credit 0 0 0 0
Settlements 2 0 2 0
Net periodic benefit cost (credit) 32 27 94 82
Other Postretirement Benefits        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 7 5 20 16
Interest cost 14 18 42 53
Expected return on plan assets (32) (30) (96) (92)
Amortization of net actuarial loss 4 3 12 9
Amortization of prior service credit (5) (3) (15) (7)
Settlements 0 0 0 0
Net periodic benefit cost (credit) (12) (7) (37) (21)
Other Postretirement Benefits | DTE Electric        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 5 4 15 12
Interest cost 11 13 32 40
Expected return on plan assets (21) (21) (65) (63)
Amortization of net actuarial loss 2 1 8 3
Amortization of prior service credit (3) (1) (10) (5)
Net periodic benefit cost (credit) $ (6) $ (4) $ (20) $ (13)
v3.20.2
Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended
Sep. 08, 2020
Sep. 30, 2020
Sep. 30, 2020
Sep. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Defined Benefit Plan Disclosure [Line Items]              
Contribution of common stock to pension plan     $ 82,000,000   $ 100,000,000    
Qualified Plan              
Defined Benefit Plan Disclosure [Line Items]              
Cash contribution           $ 2,000,000  
Pension Benefits              
Defined Benefit Plan Disclosure [Line Items]              
Contribution of common stock to pension plan $ 82,000,000            
Pension Benefits | Qualified Plan              
Defined Benefit Plan Disclosure [Line Items]              
Contributions by employer           84,000,000  
Contribution of common stock to pension plan           82,000,000  
Other Postretirement Benefits              
Defined Benefit Plan Disclosure [Line Items]              
Anticipated contributions, remainder of fiscal year   $ 0 0     0  
DTE Electric | Pension Benefits              
Defined Benefit Plan Disclosure [Line Items]              
Pension cost     $ 28,000,000 $ 23,000,000   $ 79,000,000 $ 68,000,000
Cash contribution   60,000,000          
DTE Gas | Pension Benefits              
Defined Benefit Plan Disclosure [Line Items]              
Cash contribution   $ 22,000,000          
v3.20.2
Retirement Benefits and Trusteed Assets (Contributions to DTE Energy Company Affiliates Employee Benefit Plans Master Trust) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended
Sep. 08, 2020
Sep. 30, 2020
Mar. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Contribution of common stock to pension plan   $ 82 $ 100
Pension Benefits      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Number of Shares (in shares) 694,444    
Price per Share (in dollars per share) $ 118.08    
Contribution of common stock to pension plan $ 82    
v3.20.2
Segment and Related Information (Details Textuals)
customer in Millions
Sep. 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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Segment Reporting Information [Line Items]        
Revenues $ (3,284) $ (3,119) $ (8,889) $ (9,521)
Electric        
Segment Reporting Information [Line Items]        
Revenues (1,693) (1,520) (4,221) (3,945)
Gas        
Segment Reporting Information [Line Items]        
Revenues (173) (155) (964) (1,043)
Gas Storage and Pipelines        
Segment Reporting Information [Line Items]        
Revenues (204) (126) (546) (363)
Power and Industrial Projects        
Segment Reporting Information [Line Items]        
Revenues (324) (406) (850) (1,196)
Energy Trading        
Segment Reporting Information [Line Items]        
Revenues (1,061) (1,105) (2,714) (3,519)
Reconciliation and Eliminations        
Segment Reporting Information [Line Items]        
Revenues 172 195 408 548
Reconciliation and Eliminations | Electric        
Segment Reporting Information [Line Items]        
Revenues 16 16 46 43
Reconciliation and Eliminations | Gas        
Segment Reporting Information [Line Items]        
Revenues 4 3 12 8
Reconciliation and Eliminations | Gas Storage and Pipelines        
Segment Reporting Information [Line Items]        
Revenues 8 11 17 17
Reconciliation and Eliminations | Power and Industrial Projects        
Segment Reporting Information [Line Items]        
Revenues 134 160 308 462
Reconciliation and Eliminations | Energy Trading        
Segment Reporting Information [Line Items]        
Revenues 9 4 23 16
Reconciliation and Eliminations | Corporate and Other        
Segment Reporting Information [Line Items]        
Revenues $ 1 $ 1 $ 2 $ 2
v3.20.2
Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Utility operations $ 1,844 $ 1,656 $ 5,119 $ 4,937
Operating Revenues — Non-utility operations 1,440 1,463 3,770 4,584
Operating Revenues 3,284 3,119 8,889 9,521
Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations (172) (195) (408) (548)
Operating Revenues (172) (195) (408) (548)
Electric        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 1,693 1,520 4,221 3,945
Electric | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Utility operations 1,690 1,520 4,211 3,945
Operating Revenues — Non-utility operations 3 0 10 0
Electric | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (16) (16) (46) (43)
Gas        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 173 155 964 1,043
Gas | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Utility operations 173 155 964 1,043
Gas | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (4) (3) (12) (8)
Gas Storage and Pipelines        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 204 126 546 363
Gas Storage and Pipelines | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 204 126 546 363
Gas Storage and Pipelines | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (8) (11) (17) (17)
Power and Industrial Projects        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 324 406 850 1,196
Power and Industrial Projects | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 324 406 850 1,196
Power and Industrial Projects | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (134) (160) (308) (462)
Energy Trading        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues 1,061 1,105 2,714 3,519
Energy Trading | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 1,061 1,105 2,714 3,519
Energy Trading | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues (9) (4) (23) (16)
Corporate and Other | Operating segments        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues — Non-utility operations 1 2 2 3
Corporate and Other | Reconciliation and Eliminations        
Segment Reporting, Revenue Reconciling Item [Line Items]        
Operating Revenues $ (1) $ (1) $ (2) $ (2)
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 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company $ 476 $ 319 $ 1,093 $ 902
Electric        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company 398 307 675 587
Gas        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company (20) (38) 102 121
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 104 60 246 158
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 47 49 102 104
Energy Trading        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company (28) (14) 5 12
Corporate and Other        
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]        
Net Income Attributable to DTE Energy Company $ (25) $ (45) $ (37) $ (80)
v3.20.2
Related Party Transactions (Details) - NEXUS - Equity Method Investee
 9 Months Ended
Sep. 30, 2020
DTE Gas | Capacity Lease Agreement  
Related Party Transaction [Line Items]  
Term of related party agreement 15 years
DTE Gas | Service Agreement  
Related Party Transaction [Line Items]  
Term of related party agreement 15 years
DTE Electric | Service Agreement  
Related Party Transaction [Line Items]  
Term of related party agreement 20 years
v3.20.2
Related Party Transactions (Schedule of Related Party Transactions) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Related Party Transaction [Line Items]        
Operating Revenues — Utility operations $ 1,844 $ 1,656 $ 5,119 $ 4,937
Fuel, purchased power, and gas — utility 455 400 1,296 1,342
Fuel, purchased power, and gas — non-utility 1,180 1,257 2,937 3,900
DTE Electric        
Related Party Transaction [Line Items]        
Operating Revenues — Utility operations 1,690 1,519 4,211 3,944
Fuel, purchased power, and gas — utility 451 399 1,090 1,067
NEXUS | DTE Gas | Equity Method Investee        
Related Party Transaction [Line Items]        
Operating Revenues — Utility operations 8 8 24 24
Fuel, purchased power, and gas — utility 2 2 14 15
NEXUS | DTE Electric | Equity Method Investee        
Related Party Transaction [Line Items]        
Fuel, purchased power, and gas — utility 2 2 6 6
NEXUS | DTE Energy Trading | Equity Method Investee        
Related Party Transaction [Line Items]        
Fuel, purchased power, and gas — non-utility $ 7 $ 2 $ 20 $ 5