DTE ELECTRIC CO, 10-K filed on 2/10/2022
Annual Report
v3.22.0.1
Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2021
Jan. 31, 2022
Jun. 30, 2021
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
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 Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 21.2
Entity Common Stock, Shares Outstanding   193,745,891  
Documents Incorporated by Reference
Certain information in DTE Energy's definitive Proxy Statement for its 2022 Annual Meeting of Common Shareholders to be held May 5, 2022, which will be filed with the Securities and Exchange Commission pursuant to Regulation 14A, not later than 120 days after the end of the Registrants' fiscal year covered by this report on Form 10-K, is incorporated herein by reference to Part III (Items 10, 11, 12, 13, and 14) of this Form 10-K.
This combined Form 10-K is filed separately by two registrants: DTE Energy and DTE Electric. Information contained herein relating to any individual registrant is filed by such registrant solely on its own behalf. DTE Electric makes no representation as to information relating exclusively to DTE Energy.
DTE Electric, an indirect wholly-owned subsidiary of DTE Energy, meets the conditions set forth in General Instructions I(1)(a) and (b) of Form 10-K and is therefore filing this form with the reduced disclosure format specified in General Instruction I(2) of Form 10-K.
    
Entity Central Index Key 0000936340    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common stock, without par value      
Entity Information [Line Items]      
Title of 12(b) Security Common stock, without par value    
Trading Symbol DTE    
Security Exchange Name NYSE    
2019 6.25% Corporate Units      
Entity Information [Line Items]      
Title of 12(b) Security 2017 Series E 5.25% Junior Subordinated Debentures due 2077    
Trading Symbol DTW    
Security Exchange Name NYSE    
2020 Series G 4.375% Junior Subordinated Debentures due 2080      
Entity Information [Line Items]      
Title of 12(b) Security 2019 6.25% Corporate Units    
Trading Symbol DTP    
Security Exchange Name NYSE    
2021 Series E 4.375% Junior Subordinated Debentures due 2081      
Entity Information [Line Items]      
Title of 12(b) Security 2020 Series G 4.375% Junior Subordinated Debentures due 2080    
Trading Symbol DTB    
Security Exchange Name NYSE    
2021 Series E 4.375% Junior Subordinated Debentures due 2081      
Entity Information [Line Items]      
Title of 12(b) Security 2021 Series E 4.375% Junior Subordinated Debentures due 2081    
Trading Symbol DTG    
Security Exchange Name NYSE    
DTE Electric      
Entity Information [Line Items]      
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 Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag false    
Entity Shell Company false    
Entity Common Stock, Shares Outstanding   138,632,324  
Entity Central Index Key 0000028385    
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Audit Information
 12 Months Ended
Dec. 31, 2021
Auditor [Line Items]  
Auditor Firm ID 238
Auditor Name PricewaterhouseCoopers LLP
Auditor Location Detroit, Michigan
DTE Electric  
Auditor [Line Items]  
Auditor Firm ID 238
Auditor Name PricewaterhouseCoopers LLP
Auditor Location Detroit, Michigan
v3.22.0.1
Consolidated Statements of Operations - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Revenues      
Utility operations $ 7,288 $ 6,845 $ 6,638
Non-utility operations 7,676 4,578 5,530
Operating Revenues 14,964 11,423 12,168
Operating Expenses      
Fuel, purchased power, and gas — utility 1,904 1,719 1,798
Fuel, purchased power, gas, and other — non-utility 7,304 4,120 5,035
Operation and maintenance 2,420 2,305 2,316
Depreciation and amortization 1,377 1,292 1,169
Taxes other than income 431 395 406
Asset (gains) losses and impairments, net 33 37 14
Operating Expenses 13,469 9,868 10,738
Operating Income 1,495 1,555 1,430
Other (Income) and Deductions      
Interest expense 630 601 568
Interest income (22) (29) (9)
Non-operating retirement benefits, net 17 50 39
Loss on extinguishment of debt 393 6 0
Other income (254) (259) (250)
Other expenses 75 104 69
Other (Income) and Deductions 839 473 417
Income Before Income Taxes 656 1,082 1,013
Income Tax Expense (Benefit) (Note 10) (130) 37 71
Net Income from Continuing Operations 786 1,045 942
Net Income from Discontinued Operations, Net of Taxes (Note 4) 117 326 230
Net Income 903 1,371 1,172
Less: Net Income (Loss) Attributable to Noncontrolling Interests      
Continuing operations (10) (9) (13)
Discontinued operations 6 12 16
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 907 $ 1,368 $ 1,169
Basic Earnings per Common Share      
Continuing operations (in dollars per share) $ 4.11 $ 5.46 $ 5.16
Discontinued operations (in dollars per share) 0.57 1.63 1.16
Basic Earnings per Common Share (in dollars per share) 4.68 7.09 6.32
Diluted Earnings per Common Share      
Continuing operations (in dollars per share) 4.10 5.45 5.15
Discontinued operations (in dollars per share) 0.57 1.63 1.16
Diluted Earnings per Common Share (in dollars per share) $ 4.67 $ 7.08 $ 6.31
Weighted Average Common Shares Outstanding      
Basic (in shares) 193 193 185
Diluted (in shares) 194 193 185
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Consolidated Statements of Operations - DTE Electric Company - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Revenues $ 7,288 $ 6,845 $ 6,638
Operating Expenses      
Fuel, purchased power, and gas — utility 1,904 1,719 1,798
Taxes other than income 431 395 406
Asset (gains) losses and impairments, net 33 37 14
Operating Expenses 13,469 9,868 10,738
Operating Income 1,495 1,555 1,430
Other (Income) and Deductions      
Interest expense 630 601 568
Interest income (22) (29) (9)
Non-operating retirement benefits, net 17 50 39
Other income (254) (259) (250)
Other expenses 75 104 69
Other (Income) and Deductions 839 473 417
Income Before Income Taxes 656 1,082 1,013
Income Tax Expense (130) 37 71
Net Income Attributable to DTE Energy Company/DTE Electric Company 907 1,368 1,169
DTE Electric      
Operating Revenues 5,809 5,506 5,224
Operating Expenses      
Fuel, purchased power, and gas — utility 1,541 1,397 1,390
Operation and maintenance 1,569 1,505 1,452
Depreciation and amortization 1,109 1,043 946
Taxes other than income 320 296 310
Asset (gains) losses and impairments, net 1 41 13
Operating Expenses 4,540 4,282 4,111
Operating Income 1,269 1,224 1,113
Other (Income) and Deductions      
Interest expense 335 331 313
Interest income 0 (2) (2)
Non-operating retirement benefits, net (2) (1) (1)
Other income (71) (87) (107)
Other expenses 37 96 56
Other (Income) and Deductions 299 337 259
Income Before Income Taxes 970 887 854
Income Tax Expense 104 109 138
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 866 $ 778 $ 716
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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Net Income $ 903 $ 1,371 $ 1,172
Other comprehensive income (loss), net of tax:      
Benefit obligations, net of taxes of $4, $3, and $2, respectively 8 8 8
Net unrealized gains (losses) on derivatives, net of taxes of $2, $1, and $(4), respectively 7 2 (12)
Foreign currency translation 0 1 1
Other comprehensive income (loss) 15 11 (3)
Comprehensive income 918 1,382 1,169
Less: Comprehensive income (loss) attributable to noncontrolling interests (4) 3 3
Comprehensive Income Attributable to DTE Energy Company/DTE Electric Company $ 922 $ 1,379 $ 1,166
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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Comprehensive Income [Abstract]      
Tax effect on benefit obligation $ 4 $ 3 $ 2
Tax effect on net unrealized gains (losses) on derivatives $ 2 $ 1 $ (4)
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Consolidated Statements of Comprehensive Income - DTE Electric Company - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Net Income $ 907 $ 1,368 $ 1,169
Other comprehensive income (loss), net of tax 15 11 (3)
Comprehensive Income Attributable to DTE Energy Company/DTE Electric Company 922 1,379 1,166
DTE Electric      
Net Income 866 778 716
Other comprehensive income (loss), net of tax 0 0 0
Comprehensive Income Attributable to DTE Energy Company/DTE Electric Company $ 866 $ 778 $ 716
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Consolidated Statements of Financial Position - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Current Assets    
Cash and cash equivalents $ 28 $ 472
Restricted cash 7 2
Accounts receivable (less allowance for doubtful accounts)    
Customer 1,695 1,542
Other 135 127
Inventories    
Fuel and gas 368 335
Materials, supplies, and other 490 373
Derivative assets 181 116
Regulatory assets 195 129
Other 218 185
Current assets of discontinued operations 0 217
Total Current Assets 3,317 3,498
Investments    
Nuclear decommissioning trust funds 2,071 1,855
Investments in equity method investees 187 177
Other 194 196
Total Investments 2,452 2,228
Property    
Property, plant, and equipment 37,083 34,016
Accumulated depreciation and amortization (10,139) (9,517)
Property, plant and equipment, net 26,944 24,499
Other Assets    
Goodwill 1,993 1,993
Regulatory assets 3,482 4,125
Intangible assets 177 199
Notes receivable 310 261
Derivative assets 90 40
Prepaid postretirement costs 678 561
Operating lease right-of-use assets 97 107
Other 179 126
Noncurrent assets of discontinued operations 0 7,859
Total Other Assets 7,006 15,271
Total Assets 39,719 45,496
Current Liabilities    
Accounts payable 1,414 1,000
Accrued interest 140 158
Dividends payable 171 210
Short-term borrowings 758 38
Current portion long-term debt, including finance leases 2,874 469
Derivative liabilities 238 68
Regulatory liabilities 156 39
Operating lease liabilities 14 16
Other 581 594
Current liabilities of discontinued operations 0 99
Total Current Liabilities 6,346 2,691
Long-Term Debt (net of current portion)    
Mortgage bonds, notes, and other 13,629 17,802
Junior subordinated debentures 883 1,175
Finance lease obligations 19 24
Total Long-Term Debt (net of current portion) 14,531 19,001
Other Liabilities    
Deferred income taxes 2,163 2,069
Regulatory liabilities 3,106 3,363
Asset retirement obligations 3,162 2,829
Unamortized investment tax credit 158 162
Derivative liabilities 192 60
Accrued pension liability 339 797
Accrued postretirement liability 358 407
Nuclear decommissioning 321 283
Operating lease liabilities 74 83
Other 256 326
Noncurrent liabilities of discontinued operations 0 836
Total Other Liabilities 10,129 11,215
Commitments and Contingencies (Notes 9 and 18)
Equity    
Common stock 5,379 5,406
Retained earnings 3,438 7,156
Accumulated other comprehensive loss (112) (137)
Total DTE Energy Company/DTE Electric Company Equity 8,705 12,425
Total Equity 8,713 12,589
Total Liabilities and Equity 39,719 45,496
Continuing operations    
Investments    
Investments in equity method investees 187 177
Other Assets    
Goodwill 1,993 1,993
Total Assets 39,719 37,420
Equity    
Noncontrolling interests of continuing operations 8 10
Discontinued operations    
Other Assets    
Total Assets 0 8,076
Equity    
Noncontrolling interests of continuing operations $ 0 $ 154
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Consolidated Statements of Financial Position (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Current Assets:    
Allowance for doubtful accounts $ 92 $ 104
Stockholders' Equity:    
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 193,747,509 193,770,617
Common stock, shares outstanding (in shares) 193,747,509 193,770,617
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Consolidated Statements of Financial Position - DTE Electric Company - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Current Assets    
Cash and cash equivalents $ 28,000,000 $ 472,000,000
Accounts receivable (less allowance for doubtful accounts)    
Customer 1,695,000,000 1,542,000,000
Other 135,000,000 127,000,000
Inventories    
Fuel and gas 368,000,000 335,000,000
Materials, supplies, and other 490,000,000 373,000,000
Regulatory assets 195,000,000 129,000,000
Other 218,000,000 185,000,000
Total Current Assets 3,317,000,000 3,498,000,000
Investments    
Nuclear decommissioning trust funds 2,071,000,000 1,855,000,000
Other 194,000,000 196,000,000
Total Investments 2,452,000,000 2,228,000,000
Property    
Property, plant, and equipment 37,083,000,000 34,016,000,000
Accumulated depreciation and amortization (10,139,000,000) (9,517,000,000)
Property, plant and equipment, net 26,944,000,000 24,499,000,000
Other Assets    
Regulatory assets 3,482,000,000 4,125,000,000
Operating lease right-of-use assets 97,000,000 107,000,000
Other 179,000,000 126,000,000
Total Other Assets 7,006,000,000 15,271,000,000
Total Assets 39,719,000,000 45,496,000,000
Accounts payable    
Accrued interest 140,000,000 158,000,000
Current portion long-term debt, including finance leases 2,874,000,000 469,000,000
Regulatory liabilities 156,000,000 39,000,000
Short-term borrowings    
Operating lease liabilities 14,000,000 16,000,000
Other 581,000,000 594,000,000
Total Current Liabilities 6,346,000,000 2,691,000,000
Long-Term Debt (net of current portion)    
Finance lease obligations 19,000,000 24,000,000
Total Long-Term Debt (net of current portion) 14,531,000,000 19,001,000,000
Other Liabilities    
Deferred income taxes 2,163,000,000 2,069,000,000
Regulatory liabilities 3,106,000,000 3,363,000,000
Asset retirement obligations 3,162,000,000 2,829,000,000
Unamortized investment tax credit 158,000,000 162,000,000
Nuclear decommissioning 321,000,000 283,000,000
Operating lease liabilities 74,000,000 83,000,000
Other 256,000,000 326,000,000
Total Other Liabilities 10,129,000,000 11,215,000,000
Commitments and Contingencies (Notes 9 and 18)
Shareholder's Equity    
Common stock 5,379,000,000 5,406,000,000
Retained earnings 3,438,000,000 7,156,000,000
Total DTE Energy Company/DTE Electric Company Equity 8,705,000,000 12,425,000,000
Total Liabilities and Equity 39,719,000,000 45,496,000,000
DTE Electric    
Current Assets    
Cash and cash equivalents 9,000,000 16,000,000
Accounts receivable (less allowance for doubtful accounts)    
Customer 694,000,000 763,000,000
Affiliates 36,000,000 13,000,000
Other 40,000,000 62,000,000
Inventories    
Fuel and gas 171,000,000 187,000,000
Materials, supplies, and other 316,000,000 292,000,000
Regulatory assets 168,000,000 123,000,000
Other 101,000,000 71,000,000
Total Current Assets 1,535,000,000 1,527,000,000
Investments    
Nuclear decommissioning trust funds 2,071,000,000 1,855,000,000
Other 44,000,000 42,000,000
Total Investments 2,115,000,000 1,897,000,000
Property    
Property, plant, and equipment 28,849,000,000 26,171,000,000
Accumulated depreciation and amortization (7,676,000,000) (7,050,000,000)
Property, plant and equipment, net 21,173,000,000 19,121,000,000
Other Assets    
Regulatory assets 2,968,000,000 3,440,000,000
Prepaid postretirement costs — affiliates 402,000,000 335,000,000
Operating lease right-of-use assets 64,000,000 75,000,000
Other 148,000,000 118,000,000
Total Other Assets 3,582,000,000 3,968,000,000
Total Assets 28,405,000,000 26,513,000,000
Accounts payable    
Affiliates 83,000,000 62,000,000
Other 567,000,000 410,000,000
Accrued interest 95,000,000 91,000,000
Current portion long-term debt, including finance leases 322,000,000 468,000,000
Regulatory liabilities 154,000,000 18,000,000
Short-term borrowings    
Affiliates 53,000,000 101,000,000
Other 153,000,000 0
Operating lease liabilities 10,000,000 11,000,000
Other 206,000,000 219,000,000
Total Current Liabilities 1,643,000,000 1,380,000,000
Long-Term Debt (net of current portion)    
Mortgage bonds, notes, and other 8,591,000,000 7,774,000,000
Finance lease obligations 7,000,000 13,000,000
Total Long-Term Debt (net of current portion) 8,598,000,000 7,787,000,000
Other Liabilities    
Deferred income taxes 2,741,000,000 2,525,000,000
Regulatory liabilities 2,221,000,000 2,432,000,000
Asset retirement obligations 2,932,000,000 2,607,000,000
Unamortized investment tax credit 158,000,000 162,000,000
Nuclear decommissioning 321,000,000 283,000,000
Accrued pension liability — affiliates 405,000,000 731,000,000
Accrued postretirement liability — affiliates 340,000,000 384,000,000
Operating lease liabilities 46,000,000 56,000,000
Other 97,000,000 96,000,000
Total Other Liabilities 9,261,000,000 9,276,000,000
Commitments and Contingencies (Notes 9 and 18)
Shareholder's Equity    
Common stock 6,002,000,000 5,447,000,000
Retained earnings 2,901,000,000 2,623,000,000
Total DTE Energy Company/DTE Electric Company Equity 8,903,000,000 8,070,000,000
Total Liabilities and Equity $ 28,405,000,000 $ 26,513,000,000
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Consolidated Statements of Financial Position - DTE Electric Company (Parenthetical) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Current Assets:    
Allowance for doubtful accounts $ 92 $ 104
Stockholders' Equity:    
Common stock, shares authorized (in shares) 400,000,000 400,000,000
Common stock, shares issued (in shares) 193,747,509 193,770,617
Common stock, shares outstanding (in shares) 193,747,509 193,770,617
DTE Electric    
Current Assets:    
Allowance for doubtful accounts $ 54 $ 57
Stockholders' Equity:    
Common stock, 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
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Consolidated Statements of Cash Flows - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Activities      
Net Income $ 903 $ 1,371 $ 1,172
Adjustments to reconcile Net Income to Net cash from operating activities:      
Depreciation and amortization 1,459 1,443 1,263
Nuclear fuel amortization 58 37 60
Allowance for equity funds used during construction (27) (25) (24)
Deferred income taxes (32) 407 329
Equity earnings of equity method investees (97) (132) (111)
Dividends from equity method investees 79 142 160
Loss on extinguishment of debt 393 6 0
Asset (gains) losses and impairments, net 50 47 14
Changes in assets and liabilities:      
Accounts receivable, net (146) 111 49
Inventories (153) 45 59
Prepaid postretirement benefit costs (117) (107) (24)
Accounts payable 308 0 (288)
Accrued pension liability (458) (11) (29)
Accrued postretirement liability (49) 22 0
Derivative assets and liabilities 187 (23) (28)
Regulatory assets and liabilities 862 104 160
Other current and noncurrent assets and liabilities (153) 260 (113)
Net cash from operating activities 3,067 3,697 2,649
Investing Activities      
Plant and equipment expenditures — utility (3,633) (3,241) (2,724)
Plant and equipment expenditures — non-utility (139) (616) (273)
Acquisitions related to business combinations, net of cash acquired 0 (126) (2,470)
Proceeds from sale of assets 3 13 0
Proceeds from sale of nuclear decommissioning trust fund assets 1,047 2,350 788
Investment in nuclear decommissioning trust funds (1,046) (2,350) (794)
Distributions from equity method investees 18 24 10
Contributions to equity method investees (8) (37) (149)
Notes receivable (74) (85) (98)
Other (31) (2) (22)
Net cash used for investing activities (3,863) (4,070) (5,732)
Financing Activities      
Issuance of long-term debt, net of issuance costs 4,457 3,692 2,506
Redemption of long-term debt (3,522) (882) (821)
Issuance of equity units, net of issuance costs 0 0 1,265
Short-term borrowings, net 720   219
Short-term borrowings, net   (790)  
Issuance of common stock 0 2 1,023
Repurchase of common stock (66) 0 0
Dividends paid on common stock (791) (760) (692)
Contributions from noncontrolling interests, principally REF entities 44 36 38
Distributions to noncontrolling interests (45) (39) (59)
Purchases of noncontrolling interest, principally SGG 0 0 (300)
Acquisition related deferred payment, excluding accretion 0 (380) 0
Prepayment cost for extinguishment of long-term debt (361) 0 0
Transfer of cash to DT Midstream at separation (37) 0 0
Other (84) (83) (79)
Net cash from financing activities 315 796 3,100
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash (481) 423 17
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 516 93 76
Cash, Cash Equivalents, and Restricted Cash at End of Period 35 516 93
Supplemental disclosure of cash information      
Cash paid (received) for: Interest, net of interest capitalized 671 679 595
Cash paid (received) for: Income taxes [1] (3) (360) 18
Supplemental disclosure of non-cash investing and financing activities      
Plant and equipment expenditures in accounts payable 353 266 311
Separation of DT Midstream net assets, excluding cash transferred 3,973 0 0
Premium on equity units $ 0 $ 0 $ 150
[1] 2020 cash received primarily relates to AMT credit and other refunds, of which a portion was accelerated due to the CARES Act
v3.22.0.1
Consolidated Statements of Cash Flows - DTE Electric Company - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Activities      
Net Income $ 907 $ 1,368 $ 1,169
Adjustments to reconcile Net Income to Net cash from operating activities:      
Depreciation and amortization 1,377 1,292 1,169
Nuclear fuel amortization 58 37 60
Allowance for equity funds used during construction (27) (25) (24)
Deferred income taxes (32) 407 329
Asset (gains) losses and impairments, net 50 47 14
Changes in assets and liabilities:      
Accounts receivable, net (146) 111 49
Inventories (153) 45 59
Accounts payable 308 0 (288)
Regulatory assets and liabilities 862 104 160
Other current and noncurrent assets and liabilities (153) 260 (113)
Net cash from operating activities 3,067 3,697 2,649
Investing Activities      
Proceeds from Sale and Maturity of Other Investments 1,047 2,350 788
Investment in nuclear decommissioning trust funds (1,046) (2,350) (794)
Net cash used for investing activities (3,863) (4,070) (5,732)
Financing Activities      
Issuance of long-term debt, net of issuance costs 4,457 3,692 2,506
Redemption of long-term debt (3,522) (882) (821)
Dividends paid on common stock (791) (760) (692)
Other (84) (83) (79)
Net cash from financing activities 315 796 3,100
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash (481) 423 17
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 516 93 76
Cash, Cash Equivalents, and Restricted Cash at End of Period 35 516 93
Supplemental disclosure of cash information      
Cash paid (received) for: Interest, net of interest capitalized 671 679 595
Cash paid (received) for: Income taxes [1] (3) (360) 18
Supplemental disclosure of non-cash investing and financing activities      
Plant and equipment expenditures in accounts payable 353 266 311
DTE Electric      
Operating Activities      
Net Income 866 778 716
Adjustments to reconcile Net Income to Net cash from operating activities:      
Depreciation and amortization 1,109 1,043 946
Nuclear fuel amortization 58 37 60
Allowance for equity funds used during construction (25) (23) (22)
Deferred income taxes 122 89 97
Asset (gains) losses and impairments, net 1 41 13
Changes in assets and liabilities:      
Accounts receivable, net 68 (42) 20
Inventories (11) (12) (17)
Prepaid postretirement benefit costs — affiliates (67) (69) (77)
Accounts payable 65 20 (57)
Accrued pension liability — affiliates (326) 14 (1)
Accrued postretirement liability — affiliates (44) 17 89
Regulatory assets and liabilities 716 55 139
Other current and noncurrent assets and liabilities (216) (43) (197)
Net cash from operating activities 2,316 1,905 1,709
Investing Activities      
Plant and equipment expenditures (3,017) (2,674) (2,200)
Proceeds from Sale and Maturity of Other Investments 1,047 2,350 788
Investment in nuclear decommissioning trust funds (1,046) (2,350) (794)
Notes receivable and other (31) (8) (21)
Net cash used for investing activities (3,047) (2,682) (2,227)
Financing Activities      
Issuance of long-term debt, net of issuance costs 985 1,683 643
Redemption of long-term debt (321) (632) 0
Capital contribution by parent company 555 636 180
Short-term borrowings, net — affiliate (48) 4 (4)
Short-term borrowings, net — other 153 (354) 205
Dividends paid on common stock (588) (539) (494)
Other (12) (17) (18)
Net cash from financing activities 724 781 512
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash (7) 4 (6)
Cash, Cash Equivalents, and Restricted Cash at Beginning of Period 16 12 18
Cash, Cash Equivalents, and Restricted Cash at End of Period 9 16 12
Supplemental disclosure of cash information      
Cash paid (received) for: Interest, net of interest capitalized 321 315 295
Cash paid (received) for: Income taxes 5 14 46
Supplemental disclosure of non-cash investing and financing activities      
Plant and equipment expenditures in accounts payable $ 286 $ 174 $ 192
[1] 2020 cash received primarily relates to AMT credit and other refunds, of which a portion was accelerated due to the CARES Act
v3.22.0.1
Consolidated Statements of Changes in Equity - USD ($)
$ in Millions
Total
Common Stock
Retained Earnings
Accumulated Other Comprehensive Income (Loss)
Noncontrolling Interests
Beginning balance (in shares) at Dec. 31, 2018   181,925,000      
Beginning balance at Dec. 31, 2018 $ 10,717 $ 4,245 $ 6,112 $ (120) $ 480
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Implementation of ASU 2018-02 0   25 (25)  
Net Income (Loss) 1,172   1,169   3
Dividends declared on common stock (714)   (714)    
Issuance of common stock (in shares)   8,634,000      
Issuance of common stock 1,014 $ 1,014      
Premium on equity units (150) (150)      
Issuance costs of equity units (30) $ (30)      
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 (3)     (3)  
Purchase of noncontrolling interests, principally SGG (300) $ (3)     (297)
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)   835,000      
Stock-based compensation, net distributions to noncontrolling interests, and other 30 $ 57 (5)   (22)
Ending balance (in shares) at Dec. 31, 2019   192,209,000      
Ending balance at Dec. 31, 2019 11,836 $ 5,233 6,587 (148) 164
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income (Loss) 1,371   1,368   3
Dividends declared on common stock (796)   (796)    
Issuance of common stock (in shares)   192,000      
Issuance of common stock 22 $ 22      
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 11     11  
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)   676,000      
Stock-based compensation, net distributions to noncontrolling interests, and other $ 63 $ 69 (3)   (3)
Ending balance (in shares) at Dec. 31, 2020 193,770,617 193,771,000      
Ending balance at Dec. 31, 2020 $ 12,589 $ 5,406 7,156 (137) 164
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net Income (Loss) 903   907   (4)
Dividends declared on common stock (752)   (752)    
Repurchase of common stock (in shares)   (529,000)      
Repurchase of common stock (66) $ (66)      
Other comprehensive income (loss), net of tax 15     15  
Stock-based compensation, net distributions to noncontrolling interests, and other (in shares)   506,000      
Stock-based compensation, net distributions to noncontrolling interests, and other 34 $ 39 (4)   (1)
Separation of DT Midstream $ (4,010)   (3,869) 10 (151)
Ending balance (in shares) at Dec. 31, 2021 193,747,509 193,748,000      
Ending balance at Dec. 31, 2021 $ 8,713 $ 5,379 $ 3,438 $ (112) $ 8
v3.22.0.1
Consolidated Statements of Changes in Equity (Parenthetical) - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Statement of Stockholders' Equity [Abstract]      
Dividends declared on common stock (in dollars per share) $ 3.88 $ 4.12 $ 3.85
v3.22.0.1
Consolidated Statements of Changes in Equity - DTE Electric Company - USD ($)
$ in Millions
Total
Common Stock
Retained Earnings
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       $ 6,793 $ 1,386 $ 3,245 $ 2,162
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income $ 1,169     716     716
Dividends declared on common stock (714)   $ (714) (494)     (494)
Capital contribution by parent company       180   180  
Ending balance (in shares) at Dec. 31, 2019   192,209,000     138,632,000    
Ending balance at Dec. 31, 2019       7,195 $ 1,386 3,425 2,384
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 1,368     778     778
Dividends declared on common stock $ (796)   (796) (539)     (539)
Capital contribution by parent company       $ 636   636  
Ending balance (in shares) at Dec. 31, 2020 193,770,617 193,771,000   138,632,324 138,632,000    
Ending balance at Dec. 31, 2020 $ 12,425     $ 8,070 $ 1,386 4,061 2,623
Increase (Decrease) in Stockholders' Equity [Roll Forward]              
Net Income 907     866     866
Dividends declared on common stock $ (752)   $ (752) (588)     (588)
Capital contribution by parent company       $ 555   555  
Ending balance (in shares) at Dec. 31, 2021 193,747,509 193,748,000   138,632,324 138,632,000    
Ending balance at Dec. 31, 2021 $ 8,705     $ 8,903 $ 1,386 $ 4,616 $ 2,901
v3.22.0.1
Organization and Basis of Presentation
 12 Months Ended
Dec. 31, 2021
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 2.3 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 include 1) DTE Vantage, formerly DTE Energy's Power and Industrial Projects segment, which is primarily involved in renewable natural gas projects, providing industrial energy services, and reduced emissions fuel projects, and 2) 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, EGLE, and for DTE Energy, the CFTC and CARB.
Basis of Presentation
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 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 the Registrants were reclassified to match the current year's Consolidated Financial Statements presentation.
Separation of DT Midstream
On July 1, 2021, DTE Energy completed the previously announced separation of its natural gas pipeline, storage and gathering non-utility business. Effective with the separation, DTE retains no ownership in the new company, DT Midstream, which was formerly comprised of DTE Energy's Gas Storage and Pipelines segment and also included certain DTE Energy holding company activity within the Corporate and Other segment. Gas Storage and Pipelines is no longer a reportable segment of DTE Energy, and financial results of DT Midstream are presented as Income from discontinued operations, net of taxes on DTE Energy's Consolidated Statements of Operations. Assets and liabilities of DT Midstream are also presented as discontinued operations on DTE Energy's Consolidated Statements of Financial Position. Prior periods have been recast to reflect this presentation.
No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows, or the Consolidated Statements of Changes in Equity. Unless noted otherwise, discussion in the Notes to the Consolidated Financial Statements relate to continuing operations. Refer to Note 4 to the Consolidated Financial Statements, “Dispositions and Impairments,” for additional information regarding the separation of DT Midstream and discontinued operations.
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 equity investment is valued at cost minus any impairments, if applicable. 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.
During the third quarter of 2021, the Registrants performed reassessments of certain VIEs owned by DT Midstream. Upon the separation of DT Midstream, DTE Energy no longer owns any interest in SGG, owner and operator of certain midstream natural gas assets. Therefore, SGG has been removed from the amounts for DTE Energy's consolidated VIEs in the table below. Additionally, as a result of the separation of DT Midstream, DTE Energy no longer has an equity interest in NEXUS, owner of a pipeline which transports shale gas to Ohio, Michigan, and Ontario market centers. DTE Energy has removed its equity investment in NEXUS from the amounts for its non-consolidated VIEs. The Registrants maintain a variable interest in NEXUS relating to DTE Electric's transportation services contract. Assets, liabilities, and earnings related to SGG and NEXUS are included in discontinued operations in the Consolidated Financial Statements.
During the fourth quarter of 2021, DTE Energy also performed reassessments of REF entities that were previously concluded to be VIEs. The REF entities have ceased operations as of December 31, 2021 and DTE Energy has concluded the REF entities are no longer VIEs. Therefore, the REF entities have been removed from the VIE tables below.
Other entities within the DTE Vantage 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.
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. As of December 31, 2021, 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 December 31, 2021, 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. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, and future funding commitments.
The following table summarizes the major Consolidated Statements of Financial Position items for consolidated VIEs as of December 31, 2021 and 2020. 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:
December 31,
20212020
(In millions)
ASSETS
Cash and cash equivalents$11 $20 
Restricted cash6 — 
Accounts receivable1 28 
Inventories3 107 
Property, plant, and equipment, net4 14 
Notes receivable and other70 33 
$95 $202 
LIABILITIES
Accounts payable$5 $22 
Short-term borrowings75 38 
Other current and long-term liabilities— 4 
$80 $64 
Amounts for DTE Energy's non-consolidated VIEs are as follows:
December 31,
20212020
(In millions)
Investments in equity method investees$172 $159 
Notes receivable$13 $21 
Future funding commitments$3 $6 
Equity Method Investments
Investments in non-consolidated affiliates that are not controlled by the Registrants, but over which they have significant influence, are accounted for using the equity method. Certain of the equity method investees are also considered VIEs and disclosed in the non-consolidated VIEs table above.
At December 31, 2021 and 2020, DTE Energy's Investments in equity method investees were $187 million and $177 million, respectively. The balances are primarily comprised of investments in the DTE Vantage and Corporate and Other segments, of which no investment is individually significant. DTE Vantage investments include projects that deliver energy and utility-type products and services to industrial customers, sell electricity from renewable energy projects under long-term power purchase agreements, and produce and sell metallurgical coke. Corporate and Other holds various ownership interests in limited partnerships that include investment funds supporting regional development and economic growth. For further information by segment, see Note 22 to the Consolidated Financial Statements, "Segment and Related Information."
At December 31, 2021 and 2020, DTE Energy's share of the underlying equity in the net assets of the investees exceeded the carrying amounts of Investments in equity method investees by $99 million and $93 million, respectively. The difference is being amortized over the life of the underlying assets. As of December 31, 2021 and 2020, DTE Energy's consolidated retained earnings balance includes undistributed earnings from equity method investments of $32 million and $15 million, respectively.
v3.22.0.1
Significant Accounting Policies
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Significant Accounting Policies SIGNIFICANT ACCOUNTING POLICIES
Other Income
Other income for the Registrants is recognized for non-operating income such as equity earnings of equity method investees, allowance for equity funds used during construction, contract services, and gains from trading securities, primarily from those held in DTE Energy's rabbi trust. The DTE Vantage segment also recognizes Other income in connection with the sale of membership interests in reduced emissions fuel facilities to investors. In exchange for the cash received, the investors receive a portion of the economic attributes of the facilities, including income tax attributes. The transactions are not treated as a sale of membership interests for financial reporting purposes. Other income related to fixed non-refundable cash payments received from investors for which the earnings process is not contingent upon production of refined coal is recognized on a straight-line basis over the non-cancelable contract term as the economic benefit from the ownership of the facility is transferred to investors. Other income related to cash payments that is contingent upon production of refined coal is considered earned and recognized when the contingency regarding the timing and amount of payment is resolved, generally as refined coal is produced and tax credits are generated.
The following is a summary of DTE Energy's Other income:
202120202019
(In millions)
Income from REF entities$141 $139 $130 
Equity earnings of equity method investees38 26 14 
Contract services27 28 29 
Allowance for equity funds used during construction27 25 24 
Gains from rabbi trust securities(a)
8 28 37 
Other13 13 16 
$254 $259 $250 
_______________________________________
(a)Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations.
The following is a summary of DTE Electric's Other income:
202120202019
(In millions)
Contract services$27 $28 $32 
Allowance for equity funds used during construction25 23 22 
Gains from rabbi trust securities allocated from DTE Energy(a)
8 28 37 
Other11 8 16 
$71 $87 $107 
_______________________________________
(a)Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations.
For information on equity earnings of equity method investees by segment, see Note 22 to the Consolidated Financial Statements, "Segment and Related Information."
Accounting for ISO Transactions
DTE Electric participates in the energy market through MISO. MISO requires that DTE Electric submit hourly day-ahead, real-time, and FTR bids and offers for energy at locations across the MISO region. DTE Electric accounts for MISO transactions on a net hourly basis in each of the day-ahead, real-time, and FTR markets. In any single hour, transactions in each of the MISO energy markets are netted based on MWh to determine if DTE Electric is in a net sale or purchase position. Net purchases are recorded in Fuel, purchased power, and gas — utility and net sales are recorded in Operating Revenues — Utility operations on the Registrants' Consolidated Statements of Operations.
The Energy Trading segment participates in the energy markets through various ISOs and RTOs. These markets require that Energy Trading submits hourly day-ahead, real-time bids and offers for energy at locations across each region. Energy Trading submits bids in the annual and monthly auction revenue rights and FTR auctions to the RTOs. Energy Trading accounts for these transactions on a net hourly basis for the day-ahead, real-time, and FTR markets. These transactions are related to trading contracts which, if derivatives, are presented on a net basis in Operating Revenues — Non-utility operations, and if non-derivatives, the realized gains and losses for sales are recorded in Operating Revenues — Non-utility operations and purchases are recorded in Fuel, purchased power, gas, and other — non-utility in the DTE Energy Consolidated Statements of Operations.
DTE Electric and Energy Trading record accruals for future net purchases adjustments based on historical experience and reconcile accruals to actual costs when invoices are received from MISO and other ISOs and RTOs.
Derivatives
Energy Trading classifies derivative transactions as revenue or expense based on the intent of the transaction (buy or sell). Revenues are recorded on a gross or net basis within the income statement depending upon whether it represents a non-trading activity or trading activity, respectively. For additional information, refer to Note 13 to the Consolidated Financial Statements, "Financial and Other Derivative Instruments".
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, if any. For the years ended December 31, 2021 and 2020, reclassifications out of Accumulated other comprehensive income (loss) were not material.
The following table summarizes the changes in DTE Energy's Accumulated other comprehensive income (loss) by component(a) for the years ended December 31, 2021 and 2020:
Net Unrealized Gain (Loss) on Derivatives
Benefit Obligations(b)
Foreign Currency TranslationTotal
(In millions)
Balance, December 31, 2019$(25)$(117)$(6)$(148)
Other comprehensive income (loss) before reclassifications(3)(2)1 (4)
Amounts reclassified from Accumulated other comprehensive loss5 10 — 15 
Net current period Other comprehensive income2 8 1 11 
Balance, December 31, 2020$(23)$(109)$(5)$(137)
Other comprehensive income before reclassifications1 1 — 2 
Amounts reclassified from Accumulated other comprehensive loss6 7 — 13 
Net current period Other comprehensive income7 8 — 15 
Separation of DT Midstream5 — 5 10 
Balance, December 31, 2021$(11)$(101)$— $(112)
______________________________________
(a)All amounts are net of tax, except for Foreign currency translation.
(b)The amounts reclassified from Accumulated other comprehensive income (loss) are included in the computation of the net periodic pension and other postretirement benefit costs (see Note 20 to the Consolidated Financial Statements, "Retirement Benefits and Trusteed Assets").
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, 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 are primarily composed of trade receivables, notes receivable, and unbilled revenue. The Registrants' financing receivables are stated at net realizable value.
DTE Energy had unbilled revenues of $1.0 billion and $0.8 billion at December 31, 2021 and 2020, respectively, including $270 million and $260 million of DTE Electric unbilled revenues, respectively, included in Customer Accounts receivable.
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 December 31, 2021.
DTE EnergyDTE Electric
Year of origination
202120202019 and priorTotal2021 and prior
(In millions)
Notes receivable
Internal grade 1$— $— $21 $21 $14 
Internal grade 216 107 6 129 3 
Total notes receivable(a)
$16 $107 $27 $150 $17 
Net investment in leases
Net investment in leases, internal grade 1$— $1 $38 $39 $— 
Net investment in leases, internal grade 2— 159 1 160 — 
Total net investment in leases(a)
$— $160 $39 $199 $— 
_______________________________________
(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 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 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 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.
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 tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves:
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2021$101 $3 $104 $57 
Current period provision53 1 54 36 
Write-offs charged against allowance(126)(1)(127)(77)
Recoveries of amounts previously written off61 — 61 38 
Ending reserve balance, December 31, 2021$89 $3 $92 $54 
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2020(a)
$79 $4 $83 $46 
Current period provision102 3 105 61 
Write-offs charged against allowance(130)(4)(134)(80)
Recoveries of amounts previously written off50 — 50 30 
Ending reserve balance, December 31, 2020$101 $3 $104 $57 
_______________________________________
(a)DTE Energy Trade accounts receivable beginning reserve balance excludes $8 million related to the discontinued operations of DT Midstream. Prospective activity includes only the continuing operations of DTE Energy.
Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows:
Year Ended December 31,
202120202019
(In millions)
DTE Energy$55 $105 $106 
DTE Electric$36 $62 $65 
There are no material amounts of past due financing receivables for the Registrants as of December 31, 2021.
Inventories
Inventory related to utility and non-utility operations is valued at the lower of cost or net realizable value, where cost is generally valued using average cost. Inventory primarily includes fuel, gas, materials, and supplies. Other inventories include RECs, emission allowances, and other environmental products in the Energy Trading segment.
DTE Gas' natural gas inventory of $50 million and $40 million as of December 31, 2021 and 2020, respectively, is determined using the last-in, first-out (LIFO) method. The replacement cost of gas in inventory exceeded the LIFO cost by $136 million and $62 million at December 31, 2021 and 2020, respectively.
Property, Retirement and Maintenance, and Depreciation and Amortization
Property is stated at cost and includes construction-related labor, materials, overheads, and AFUDC for utility property. The cost of utility properties retired is charged to accumulated depreciation. Expenditures for maintenance and repairs are charged to expense when incurred.
Utility property at DTE Electric and DTE Gas is depreciated over its estimated useful life using straight-line rates approved by the MPSC. DTE Energy's non-utility property is depreciated over its estimated useful life using the straight-line method. Depreciation and amortization expense also includes the amortization of certain regulatory assets for the Registrants.
The cost of nuclear fuel is capitalized. The amortization of nuclear fuel is included within Fuel, purchased power, and gas — utility in the DTE Energy Consolidated Statements of Operations, and Fuel and purchased power in the DTE Electric Consolidated Statements of Operations, and is recorded using the units-of-production method.
See Note 6 to the Consolidated Financial Statements, "Property, Plant, and Equipment."
Long-Lived Assets
Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. If the carrying amount of the asset exceeds the expected undiscounted future cash flows generated by the asset, an impairment loss is recognized resulting in the asset being written down to its estimated fair value. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell.
Intangible Assets
The Registrants have certain Intangible assets as shown below:
December 31, 2021December 31, 2020
Useful LivesGross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
(In millions)
Intangible assets subject to amortization
Contract intangibles
6 to 26 years
$271 $(98)$173 $271 $(83)$188 
Intangible assets not subject to amortization(a)
4 — 4 11 — 11 
DTE Energy Long-term intangible assets$275 $(98)$177 $282 $(83)$199 
______________________________________
(a)Amounts primarily include Renewable energy credits and Gas carbon offsets that are charged to expense, using average cost, as the credits are consumed in the operation of the business. Amounts include DTE Electric intangible assets of $2 million and $11 million as of December 31, 2021 and 2020, respectively, and are included in Other Assets — Other on the DTE Electric Consolidated Statements of Financial Position.
The following table summarizes DTE Energy's estimated contract intangible amortization expense expected to be recognized during each year through 2026:
20222023202420252026
(In millions)
Estimated amortization expense$16 $16 $16 $16 $14 
DTE Energy amortizes contract intangible assets on a straight-line basis over the expected period of benefit. DTE Energy's Intangible assets amortization expense was $16 million in 2021 and 2020 and $9 million in 2019.
Cloud Computing Arrangements
Effective upon the adoption of ASU No. 2018-15 in January 2020, the Registrants capitalize implementation costs incurred in a cloud computing arrangement that is a service contract consistent with capitalized implementation costs incurred to develop or obtain internal-use software. Capitalized costs are recorded in Other noncurrent assets on the Consolidated Statements of Financial Position and amortization of the costs is reflected in Operation and maintenance within the Consolidated Statements of Operations. Costs are amortized on a straight-line basis over the life of the contract. Contracts primarily involve the implementation or upgrade of cloud-based solutions for generation and distribution operations and customer service support.
Capitalized cloud computing costs were $16 million for DTE Energy, including $12 million for DTE Electric, at December 31, 2021. Amortization of these costs was not material for the year ended December 31, 2021. There were no cloud computing costs capitalized in Other noncurrent assets at December 31, 2020.
Excise and Sales Taxes
The Registrants record the billing of excise and sales taxes as a receivable with an offsetting payable to the applicable taxing authority, with no net impact on the Registrants’ Consolidated Statements of Operations.
Deferred Debt Costs
The costs related to the issuance of long-term debt are deferred and amortized over the life of each debt issue. The deferred amounts are included as a direct deduction from the carrying amount of each debt issue in Mortgage bonds, notes, and other and Junior subordinated debentures on DTE Energy's Consolidated Statements of Financial Position and in Mortgage bonds, notes, and other on DTE Electric's Consolidated Statements of Financial Position. In accordance with MPSC regulations applicable to DTE Energy’s electric and gas utilities, the unamortized discount, premium, and expense related to utility debt redeemed with a refinancing are amortized over the life of the replacement issue. Discounts, premiums, and expense on early redemptions of debt associated with DTE Energy's non-utility operations are charged to earnings.
Investments in Debt and Equity Securities
The Registrants generally record investments in debt and equity securities at market value with unrealized gains or losses included in earnings. Changes in the fair value of Fermi 2 nuclear decommissioning investments are recorded as adjustments to Regulatory assets or liabilities, due to a recovery mechanism from customers. The Registrants' equity investments are reviewed for impairment each reporting period. If the assessment indicates that an impairment exists, a loss is recognized resulting in the equity investment being written down to its estimated fair value. See Note 12 of the Consolidated Financial Statements, "Fair Value."
DTE Energy Foundation
DTE Energy's contributions to the DTE Energy Foundation were $25 million and $20 million for the years ended December 31, 2021 and December 31, 2020, respectively. There were no charitable contributions made to the DTE Energy Foundation for the year ended December 31, 2019. The DTE Energy Foundation is a non-consolidated not-for-profit private foundation, the purpose of which is to contribute to and assist charitable organizations.
Other Accounting Policies
See the following notes for other accounting policies impacting the Registrants’ Consolidated Financial Statements:
NoteTitle
5Revenue
6Property, Plant, and Equipment
8Asset Retirement Obligations
9Regulatory Matters
10Income Taxes
12Fair Value
13Financial and Other Derivative Instruments
17Leases
20Retirement Benefits and Trusteed Assets
21Stock-Based Compensation
v3.22.0.1
New Accounting Pronouncements
 12 Months Ended
Dec. 31, 2021
Accounting Standards Update and Change in Accounting Principle [Abstract]  
New Accounting Pronouncements NEW ACCOUNTING PRONOUNCEMENTS
Recently Adopted 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 Registrants adopted the ASU effective January 1, 2021 using the modified retrospective and prospective approaches, where applicable. The adoption of the ASU did 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, as amended. The amendments in this update provide optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The optional relief is temporary and cannot be applied to contract modifications and hedging relationships entered into or evaluated after December 31, 2022. The Registrants adopted the ASU and elected the optional expedients for contract modifications prospectively. The adoption of the ASU did not have a significant impact on the registrant's 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 Registrants adopted the ASU effective January 1, 2021 using the modified retrospective approach. The adoption of the ASU did not have a significant impact on the Registrants' Consolidated Financial Statements.
Recently Issued Pronouncements
In July 2021, the FASB issued ASU No. 2021-05, Leases (Topic 842): Lessors – Certain Leases with Variable Lease Payments. The amendments in this update modify lease classification requirements for lessors, providing that lease contracts with variable lease payments that do not depend on a reference index or a rate should be classified as operating leases if they would have been classified as a sales-type or direct financing lease and resulted in the recognition of a selling loss at lease commencement. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2021, and interim periods therein. The Registrants will apply the guidance prospectively. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
In October 2021, The FASB issued ASU No. 2021-08, Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. The amendments in this update require contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC 606, Revenue from Contracts with Customers. Historically, such amounts were recognized by the acquirer at fair value in acquisition accounting. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2022, and interim periods therein. Early adoption is permitted. The Registrants will apply the guidance prospectively to acquisitions occurring on or after the effective date.
v3.22.0.1
Dispositions and Impairments
 12 Months Ended
Dec. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]  
Dispositions and Impairments DISPOSITIONS AND IMPAIRMENTS
Separation of DT Midstream
On October 27, 2020, DTE Energy announced that its Board of Directors had authorized management to pursue a plan to spin-off its natural gas pipeline, storage and gathering non-utility business. On July 1, 2021, DTE Energy completed the separation of the new company, DT Midstream, through the distribution of 96,732,466 shares of DT Midstream common stock to DTE Energy shareholders. The distribution reflected 100% of the outstanding common stock of DT Midstream as of 5:00 p.m. ET on June 18, 2021 (the “record date”). DTE Energy shareholders received one share of DT Midstream common stock for every two shares of DTE Energy common stock held at the close of business on the record date, with certain shareholders receiving cash in lieu of fractional shares of DT Midstream common stock. For U.S. federal income tax purposes, DTE Energy’s U.S. shareholders generally should not recognize gain or loss as a result of the distribution of DT Midstream stock, except with respect to cash received in lieu of fractional shares.
In June 2021, in order to facilitate the separation and settle intercompany balances with DTE Energy, DT Midstream issued long-term debt in the form of $2.1 billion senior notes and a $1.0 billion term loan. Using the debt proceeds, net of discount and issuance costs of $53 million, DT Midstream made the following cash payments:
•Settled Short-term borrowings due to DTE Energy as of June 30, 2021 of $2,537 million
•Settled affiliate Accounts receivable due from DTE Energy and affiliate Accounts payable due to DTE Energy as of June 30, 2021 for net cash paid to DTE Energy of $9 million
•Provided a one-time special dividend to DTE Energy of $501 million
These payments eliminated in consolidation and had no direct impact on DTE Energy’s Consolidated Financial Statements of Financial Position. During the third quarter 2021, DTE Energy used the proceeds received from DT Midstream to optionally redeem $2.6 billion of long-term debt. Refer to Note 10 to the Consolidated Financial Statements, “Long-term Debt,” for additional information.
Continuing Involvement
Following the separation on July 1, 2021, DT Midstream became an independent public company listed under the symbol “DTM” on the New York Stock Exchange (NYSE) and DTE Energy no longer retains any ownership in DT Midstream. In order to govern the ongoing relationships between DT Midstream and DTE Energy after the separation and to facilitate an orderly transition, the parties entered into a series of agreements including the following:
•Separation and Distribution Agreement – sets forth the principal actions to be taken in connection with the separation, including the transfer of assets and assumption of liabilities, among others, and sets forth other agreements governing aspects of the relationship between DTE Energy and DT Midstream
•Transition Services Agreement – allows for DTE Energy to provide DT Midstream with specified services for a limited time and no longer than 24 months following the separation, with related costs to be paid by DT Midstream. Services include support for gas operations, information technology, accounting, tax, legal, human resources, and various other administrative services
•Tax Matters Agreement – governs the respective rights, responsibilities and obligations of DTE Energy and DT Midstream after the separation with respect to all tax matters
•Employee Matters Agreement – addresses certain employment, compensation and benefits matters, including the allocation and treatment of certain assets and liabilities relating to DT Midstream employees
In addition, DTE Energy and its subsidiaries have various commercial agreements that are continuing after the separation. These agreements include certain pipeline, gathering, and storage services and operating and maintenance agreements, and are not considered material to the Consolidated Financial Statements.
Discontinued Operations
The table below reflects the financial results of DT Midstream that have been reclassified from continuing operations and included in discontinued operations within the Consolidated Statements of Operations. These results include the impact of tax-related adjustments and all transaction costs related to the separation. General corporate overhead costs have been excluded and no portion of corporate interest costs were allocated to discontinued operations.
Year Ended December 31,
202120202019
Operating Revenues — Non-utility operations$405 $754 $501 
Operating Expenses
Cost of gas and other — non-utility15 21 18 
Operation and maintenance(a)
123 138 103 
Depreciation and amortization82 151 94 
Taxes other than income13 15 8 
Asset (gains) losses and impairments, net17 (2)1 
250 323 224 
Operating Income155 431 277 
Other (Income) and Deductions
Interest expense50 113 73 
Interest income(4)(9)(8)
Other income(62)(129)(100)
Other expenses— — 1 
(16)(25)(34)
Income from Discontinued Operations Before Income Taxes171 456 311 
Income Tax Expense54 130 81 
Net Income from Discontinued Operations, Net of Taxes117 326 230 
Less: Net Income Attributable to Noncontrolling Interests6 12 16 
Net Income from Discontinued Operations$111 $314 $214 
_______________________________________
(a)Includes separation transaction costs of $59 million and $8 million for the years ended December 31, 2021 and 2020, respectively, for various legal, accounting and other professional services fees.
The table below reflects the major assets and liabilities that were transferred to DT Midstream and presented as discontinued operations in the Consolidated Statements of Financial Position as of December 31, 2020.
December 31, 2020
(In millions)
Total Assets of Discontinued Operations
Cash$42 
Accounts receivable126 
Inventories8 
Other44 
Current assets of DT Midstream220 
Less: Previously affiliated amounts eliminated at DTE Energy3 
Current assets of discontinued operations for DTE Energy217 
Investments in equity method investees1,691 
Net property, plant, and equipment3,470 
Goodwill473 
Intangible assets2,140 
Notes receivable19 
Operating lease right-of-use assets45 
Other21 
Noncurrent assets of discontinued operations for DTE Energy7,859 
Total Assets of Discontinued Operations for DTE Energy$8,076 
Total Liabilities of Discontinued Operations
Accounts payable$39 
Operating lease liabilities17 
Short-term borrowings due to DTE Energy2,913 
Other53 
Current liabilities of DT Midstream3,022 
Less: Previously affiliated amounts eliminated at DTE Energy2,923 
Current liabilities of discontinued operations for DTE Energy99 
Deferred income taxes753 
Asset retirement obligations10 
Operating lease liabilities28 
Other45 
Noncurrent liabilities of discontinued operations for DTE Energy836 
Total Liabilities of Discontinued Operations for DTE Energy$935 
There were no assets or liabilities from discontinued operations as of December 31, 2021. DT Midstream had net assets of $4.0 billion that separated on July 1, 2021 that resulted in a reduction to DTE Energy's equity. Refer to the Separation of DT Midstream line within DTE Energy's Consolidated Statements of Changes in Equity for further details.
The following table is a summary of significant non-cash items, capital expenditures, and significant financing activities of discontinued operations included in DTE Energy's Consolidated Statements of Cash Flows:
Year Ended December 31,
202120202019
(In millions)
Operating Activities
Depreciation and amortization$82 $151 $94 
Deferred income taxes53 125 78 
Equity earnings of equity method investees(59)(106)(97)
Asset (gains) losses and impairments, net19 (2)1 
Investing Activities
Plant and equipment expenditures — non-utility$(60)$(517)$(214)
Acquisitions related to business combinations, net of cash acquired— — (2,296)
Financing Activities
Purchase of noncontrolling interest$— $— $(297)
Acquisition related deferred payment, excluding accretion— (380)— 
DTE Vantage Segment Impairment
DTE Vantage owns a pulverized coal facility located at DTE Electric’s River Rouge power plant. The facility provides pulverized coal to a steel industry customer through a supply agreement expiring in 2028. The River Rouge plant provides operation and maintenance services to the facility through an agreement which also expires in 2028.
During the second quarter 2021, DTE Electric retired the River Rouge plant and provided an early termination notice of the operation and maintenance services agreement with the pulverized coal facility. The termination became effective December 31, 2021 and DTE Vantage has ceased operations at the facility.
In connection with these events, DTE Energy performed an impairment analysis of the pulverized coal facility long-lived assets in accordance with ASC 360, Property, Plant and Equipment. Based on its undiscounted cash flow projections, DTE Energy determined that the carrying value of the pulverized coal facility asset group is not recoverable. As a result, DTE Energy recorded a non-cash impairment charge of $27 million, which is included in Asset (gains) losses and impairments, net on DTE Energy’s Consolidated Statements of Operations for the year ended December 31, 2021. The charge included $18 million to fully impair the long-lived assets recorded to Property, plant and equipment and a $9 million write-down of Other noncurrent assets to fair value. Fair value of the assets was determined using an income approach, which utilized assumptions including management’s best estimates of the expected future cash flows, the estimated useful life of the asset group and discount rate.
During the fourth quarter 2021, DTE Energy terminated the supply agreement with the steel industry customer and settled all outstanding claims. As a result, DTE Energy reversed $17 million of deferred revenues that were previously recorded, which increased Operating Revenues - Non-utility operations for the year ended December 31, 2021.
v3.22.0.1
Revenue
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Revenue REVENUE
Significant Accounting Policy
Revenue is measured based upon the consideration specified in a contract with a customer at the time when performance obligations are satisfied. A performance obligation is a promise in a contract to transfer a distinct good or service or a series of distinct goods or services to the customer. The Registrants recognize revenue when performance obligations are satisfied by transferring control over a product or service to a customer. The Registrants have determined control to be transferred when the product is delivered, or the service is provided to the customer.
Rates for DTE Electric and DTE Gas include provisions to adjust billings for fluctuations in fuel and purchased power costs, cost of natural gas, and certain other costs. Revenues are adjusted for differences between actual costs subject to reconciliation and the amounts billed in current rates. Under or over recovered revenues related to these cost recovery mechanisms are included in Regulatory assets or liabilities on the Registrants' Consolidated Statements of Financial Position and are recovered or returned to customers through adjustments to the billing factors.
For discussion of derivative contracts, see Note 13 to the Consolidated Financial Statements, "Financial and Other Derivative Instruments."
Disaggregation of Revenue
The following is a summary of revenues disaggregated by segment for DTE Energy:
202120202019
(In millions)
Electric(a)
Residential$2,926 $2,825 $2,427 
Commercial1,908 1,739 1,795 
Industrial628 592 659 
Other(b)
359 364 348 
Total Electric operating revenues$5,821 $5,520 $5,229 
Gas
Gas sales$1,058 $971 $1,043 
End User Transportation233 218 219 
Intermediate Transportation82 79 78 
Other(b)
180 146 142 
Total Gas operating revenues$1,553 $1,414 $1,482 
Other segment operating revenues
DTE Vantage$1,482 $1,224 $1,560 
Energy Trading$6,831 $3,863 $4,610 
_______________________________________
(a)Revenues generally represent those of DTE Electric, except $12 million, $14 million, and $5 million of Other revenues related to DTE Sustainable Generation for the years ended December 31, 2021, 2020, and 2019, respectively.
(b)Includes revenue adjustments related to various regulatory mechanisms.
Revenues included the following which were outside the scope of Topic 606:
202120202019
(In millions)
Electric — Alternative Revenue Programs$36 $26 $22 
Electric — Other revenues19 22 19 
Gas — Alternative Revenue Programs10 10 8 
Gas — Other revenues6 8 7 
DTE Vantage — Leases103 99 121 
Energy Trading — Derivatives5,603 2,690 3,415 
Nature of Goods and Services
The following is a description of principal activities, separated by reportable segments, from which DTE Energy generates revenue. For more detailed information about reportable segments, see Note 22 to the Consolidated Financial Statements, “Segment and Related Information.”
The Registrants have contracts with customers which may contain more than one performance obligation. When more than one performance obligation exists in a contract, the consideration under the contract is allocated to the performance obligations based on the relative standalone selling price. DTE Energy generally determines standalone selling prices based on the prices charged to customers or the use of the adjusted market assessment approach. The adjusted market assessment approach involves the evaluation of the market in which DTE Energy sells goods or services and estimating the price that a customer in that market would be willing to pay.
Under Topic 606, when a customer simultaneously receives and consumes the product or service provided, revenue is considered to be recognized over time. Alternatively, if it is determined that the criteria for recognition of revenue over time is not met, the revenue is considered to be recognized at a point in time.
Electric
Electric consists principally of DTE Electric. Electric revenues are primarily comprised of the supply and delivery of electricity, and related capacity. Revenues are primarily associated with cancellable contracts, with the exception of certain long-term contracts with commercial and industrial customers. Revenues, including estimated unbilled amounts, are generally recognized over time based upon volumes delivered or through the passage of time ratably based upon providing a stand-ready service. The Registrants have determined that the above methods represent a faithful depiction of the transfer of control to the customer. Unbilled revenues are typically determined utilizing approved tariff rates and estimated meter volumes. Estimated unbilled amounts recognized in revenue are subject to adjustment in the following reporting period as actual volumes by customer class are known. Revenues are typically subject to tariff rates based upon customer class and type of service and are billed and received monthly. Tariff rates are determined by the MPSC on a per unit or monthly basis.
Gas
Gas consists principally of DTE Gas. Gas revenues are primarily comprised of the supply and delivery of natural gas, and other services including storage, transportation, and appliance maintenance. Revenues are primarily associated with cancellable contracts with the exception of certain long-term contracts with commercial and industrial customers. Revenues, including estimated unbilled amounts, are generally recognized over time based upon volumes delivered or through the passage of time ratably based upon providing a stand-ready service. DTE Energy has determined that the above methods represent a faithful depiction of the transfer of control to the customer. Unbilled revenues are typically determined using both estimated meter volumes and estimated usage based upon the number of unbilled days and historical temperatures. Estimated unbilled amounts recognized in revenue are subject to adjustment in the following reporting period as actual volumes by customer class and service type are known. Revenues are typically subject to tariff rates or other rates subject to regulatory oversight and are billed and received monthly. Tariff rates are determined by the MPSC on a per unit or monthly basis.
DTE Vantage
DTE Vantage revenues include contracts accounted for as leases which are outside of the scope of Topic 606. For performance obligations within the scope of Topic 606, the timing of revenue recognition is dependent upon when control over the associated product or service is transferred.
Revenues at DTE Vantage, within the scope of Topic 606, generally consist of sales of refined coal, coal, blast furnace coke, coke oven gas, electricity, equipment maintenance services, and other energy related products and services. Revenues, including estimated unbilled amounts, for the sale of blast furnace coke are generally recognized at a point in time when the product is delivered, which represents the transfer of control to the customer. Other revenues are generally recognized over time based upon services provided or through the passage of time ratably based upon providing a stand-ready service. DTE Energy has determined that the above methods represent a faithful depiction of the transfer of control to the customer. Market based pricing structures exist in such contracts including adjustments for consumer price or other indices. Consideration may consist of both fixed and variable components. Generally, uncertainties in the variable consideration components are resolved, and revenues are known at the time of recognition. Billing terms vary and are generally monthly with payment terms typically within 30 days following billing.
Energy Trading
Energy Trading revenues consist primarily of derivative contracts outside of the scope of Topic 606. For performance obligations within the scope of Topic 606, the timing of revenue recognition is dependent upon when control over the associated product or service is transferred.
Revenues, including estimated unbilled amounts, within the scope of Topic 606 arising from the sale of natural gas, electricity, power capacity, and other energy related products are generally recognized over time based upon volumes delivered or through the passage of time ratably based upon providing a stand-ready service. DTE Energy has determined that the above methods represent a faithful depiction of the transfer of control to the customer. Revenues are known at the time of recognition. Payment for the aforementioned revenues is generally due from customers in the month following delivery.
Revenues associated with RECs and other environmental products are recognized at a point in time when control is transferred to the customer which is deemed to be when these products are entered for transfer to the customer in the applicable tracking system. Revenues associated with RECs under a wholesale full requirements power contract are deferred until control has been transferred. The deferred revenues represent a contract liability for which payment has been received and the amounts have been estimated using the adjusted market assessment approach. With the exception of RECs, generally all other performance obligations associated with wholesale full requirements power contracts are satisfied over time in conjunction with the delivery of power. At the time power is delivered, DTE Energy may not have control over the RECs as the RECs are not self-generated and may not yet have been procured resulting in deferred revenues.
Deferred Revenue
The following is a summary of deferred revenue activity:
DTE Energy
(In millions)
Beginning Balance, January 1, 2021(a)
$65 
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period72 
Revenue recognized that was included in the deferred revenue balance at the beginning of the period(59)
Ending Balance, December 31, 2021$78 
_______________________________________
(a)Excludes $22 million of deferred revenue related to the discontinued operations of DT Midstream. Prospective activity includes only the continuing operations of DTE Energy.
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)
2022$75 
20231 
20241 
2025— 
2026— 
2027 and thereafter1 
$78 
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)
2022$292 $8 
2023285 8 
2024171 8 
202591 — 
202659 — 
2027 and thereafter364 — 
$1,262 $24 
v3.22.0.1
Property, Plant, and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant, and Equipment PROPERTY, PLANT, AND EQUIPMENT
The following is a summary of Property, plant, and equipment by classification as of December 31:
20212020
Property, plant, and equipment(In millions)
DTE Electric
Zero carbon generation
Nuclear$3,394 $3,295 
Renewables2,522 1,817 
Fossil and other generation8,640 8,031 
Distribution11,414 10,354 
Other2,879 2,674 
Total DTE Electric28,849 26,171 
DTE Gas
Distribution4,900 4,517 
Storage593 576 
Transmission and other1,415 1,341 
Total DTE Gas6,908 6,434 
DTE Vantage1,118 1,194 
Other208 217 
Total DTE Energy$37,083 $34,016 
Accumulated depreciation and amortization
DTE Electric
Zero carbon generation
Nuclear$(413)$(373)
Renewables(357)(295)
Fossil and other generation(3,214)(3,014)
Distribution(2,842)(2,686)
Other(850)(682)
Total DTE Electric(7,676)(7,050)
DTE Gas
Distribution(1,265)(1,215)
Storage(154)(146)
Transmission and other(426)(403)
Total DTE Gas(1,845)(1,764)
DTE Vantage(545)(619)
Other(73)(84)
Total DTE Energy$(10,139)$(9,517)
Net DTE Energy Property, plant, and equipment$26,944 $24,499 
Net DTE Electric Property, plant, and equipment$21,173 $19,121 
AFUDC and Capitalized Interest
AFUDC represents the cost of financing construction projects for regulated businesses, including the estimated cost of debt and authorized return-on-equity. The debt component is recorded as a reduction to interest expense and the equity component is recorded as other income. Non-regulated businesses record capitalized interest as a reduction to interest expense.
The AFUDC and capitalized interest rates were as follows for the years ended December 31:
202120202019
DTE Electric AFUDC5.46 %5.47 %5.43 %
DTE Gas AFUDC5.55 %5.56 %5.56 %
Non-regulated businesses capitalized interest3.30 %3.90 %4.00 %
The following is a summary of AFUDC and interest capitalized for the years ended December 31:
202120202019
DTE Energy(In millions)
Allowance for debt funds used during construction and interest capitalized$12 $11 $14 
Allowance for equity funds used during construction27 25 24 
Total$39 $36 $38 
202120202019
DTE Electric(In millions)
Allowance for debt funds used during construction$11 $10 $10 
Allowance for equity funds used during construction25 23 22 
Total$36 $33 $32 
Depreciation and Amortization
The composite depreciation rate for DTE Electric was approximately 4.2%, 4.2%, and 4.0% in 2021, 2020 and 2019, respectively. The composite depreciation rate for DTE Gas was 2.9%, 2.8%, and 2.7% in 2021, 2020, and 2019, respectively. The average estimated useful life for each major class of utility Property, plant, and equipment as of December 31, 2021 follows:
Estimated Useful Lives in Years
UtilityGenerationDistributionStorage
DTE Electric3438N/A
DTE GasN/A4958
The estimated useful lives for DTE Electric's Other utility assets range from 3 to 80 years, while the estimated useful lives for DTE Gas' Transmission and other utility assets range from 3 to 80 years. The estimated useful lives for major classes of DTE Energy's non-utility assets and facilities range from 3 to 50 years.
The following is a summary of Depreciation and amortization expense for DTE Energy:
202120202019
(In millions)
Property, plant, and equipment$1,095 $1,025 $927 
Regulatory assets and liabilities259 244 227 
Intangible assets16 16 9 
Other7 7 6 
$1,377 $1,292 $1,169 
The following is a summary of Depreciation and amortization expense for DTE Electric:
202120202019
(In millions)
Property, plant, and equipment$890 $831 $748 
Regulatory assets and liabilities214 207 193 
Other5 5 5 
$1,109 $1,043 $946 
Capitalized Software
Capitalized software costs are classified as Property, plant, and equipment and the related amortization is included in accumulated depreciation and amortization on the Registrants' Consolidated Financial Statements. The Registrants capitalize the costs associated with computer software developed or obtained for use in their businesses. The Registrants amortize capitalized software costs on a straight-line basis over the expected period of benefit, ranging from 3 to 15 years for both DTE Energy and DTE Electric.
The following balances for capitalized software relate to DTE Energy:
Year Ended December 31,
202120202019
(In millions)
Amortization expense of capitalized software$145 $128 $122 
Gross carrying value of capitalized software$920 $863 
Accumulated amortization of capitalized software$493 $430 
The following balances for capitalized software relate to DTE Electric:
Year Ended December 31,
202120202019
(In millions)
Amortization expense of capitalized software$132 $118 $112 
Gross carrying value of capitalized software$826 $756 
Accumulated amortization of capitalized software$439 $363 
v3.22.0.1
Jointly-Owned Utility Plant
 12 Months Ended
Dec. 31, 2021
Jointly Owned Utility Plant, Net Ownership Amount [Abstract]  
Jointly-Owned Utility Plant JOINTLY-OWNED UTILITY PLANT
DTE Electric has joint ownership interest in two power plants, Belle River and Ludington Hydroelectric Pumped Storage. DTE Electric’s share of direct expenses of the jointly-owned plants are included in Fuel, purchased power, and gas — utility and Operation and maintenance expenses in the DTE Energy Consolidated Statements of Operations and Fuel and purchased power— utility and Operation and maintenance expenses in the DTE Electric Consolidated Statements of Operations.
DTE Electric's ownership information of the two utility plants as of December 31, 2021 was as follows:
Belle RiverLudington
Hydroelectric
Pumped Storage
In-service date1984-19851973
Total plant capacity1,270 MW2,220 MW
Ownership interest81%49%
Investment in Property, plant, and equipment (in millions)$1,952 $618 
Accumulated depreciation (in millions)$1,007 $128 
Belle River
The Michigan Public Power Agency (MPPA) has ownership interests in Belle River Unit No. 1 and other related facilities. The MPPA is entitled to 19% of the total capacity and energy of the plant and is responsible for the same percentage of the plant’s operation, maintenance, and capital improvement costs.
Ludington Hydroelectric Pumped Storage
Consumers Energy Company has an ownership interest in the Ludington Hydroelectric Pumped Storage Plant. Consumers Energy is entitled to 51% of the total capacity and energy of the plant and is responsible for the same percentage of the plant’s operation, maintenance, and capital improvement costs.
v3.22.0.1
Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Asset Retirement Obligations ASSET RETIREMENT OBLIGATIONS
DTE Electric has a legal retirement obligation for the decommissioning costs for its Fermi 1 and Fermi 2 nuclear plants, dismantlement of facilities located on leased property, and various other operations. DTE Electric has conditional retirement obligations for asbestos and PCB removal at certain of its power plants and various distribution equipment. DTE Gas has conditional retirement obligations for gas pipelines, certain service centers, compressor and gate stations. The Registrants recognize such obligations as liabilities at fair market value when they are incurred, which generally is at the time the associated assets are placed in service. Fair value is measured using expected future cash outflows discounted at the Registrants' credit-adjusted risk-free rate. For its utility operations, the Registrants recognize in the Consolidated Statements of Operations removal costs in accordance with regulatory treatment. Any differences between costs recognized related to asset retirement and those reflected in rates are recognized as either a Regulatory asset or liability on the Consolidated Statements of Financial Position.
If a reasonable estimate of fair value cannot be made in the period in which the retirement obligation is incurred, such as for assets with indeterminate lives, the liability is recognized when a reasonable estimate of fair value can be made. Natural gas storage system and certain other distribution assets for DTE Gas and substations, manholes, and certain other distribution assets for DTE Electric have an indeterminate life. Therefore, no liability has been recorded for these assets.
Changes to asset retirement obligations for 2021, 2020, and 2019 were as follows:
202120202019
DTE Energy(In millions)
Asset retirement obligations at January 1$2,829 $2,656 $2,463 
Accretion167 156 148 
Liabilities incurred28 24 11 
Liabilities settled(30)(13)(17)
Revision in estimated cash flows168 6 51 
Asset retirement obligations at December 31$3,162 $2,829 $2,656 
202120202019
DTE Electric(In millions)
Asset retirement obligations at January 1$2,607 $2,447 $2,271 
Accretion155 145 138 
Liabilities incurred29 18 1 
Liabilities settled(27)(8)(14)
Revision in estimated cash flows168 5 51 
Asset retirement obligations at December 31$2,932 $2,607 $2,447 
Approximately $2.4 billion of the asset retirement obligations represent nuclear decommissioning liabilities that are funded through a surcharge to electric customers over the life of the Fermi 2 nuclear plant. The NRC has jurisdiction over the decommissioning of nuclear power plants and requires minimum decommissioning funding based upon a formula. The MPSC and FERC regulate the recovery of costs of decommissioning nuclear power plants and both require the use of external trust funds to finance the decommissioning of Fermi 2. Rates approved by the MPSC provide for the recovery of decommissioning costs of Fermi 2 and the disposal of low-level radioactive waste. DTE Electric believes the MPSC collections will be adequate to fund the estimated cost of decommissioning. The decommissioning assets, anticipated earnings thereon, and future revenues from decommissioning collections will be used to decommission Fermi 2. DTE Electric expects the liabilities to be reduced to zero at the conclusion of the decommissioning activities. If amounts remain in the trust funds for Fermi 2 following the completion of the decommissioning activities, those amounts will be disbursed based on rulings by the MPSC and FERC.
A portion of the funds recovered through the Fermi 2 decommissioning surcharge and deposited in external trust accounts is designated for the removal of non-radioactive assets and returning the site to greenfield. This removal and greenfielding is not considered a legal liability. Therefore, it is not included in the asset retirement obligation, but is reflected as the Nuclear decommissioning liability. The decommissioning of Fermi 1 is funded by DTE Electric. Contributions to the Fermi 1 trust are discretionary. For additional discussion of Nuclear decommissioning trust fund assets, see Note 12 to the Consolidated Financial Statements, "Fair Value."
v3.22.0.1
Regulatory Matters
 12 Months Ended
Dec. 31, 2021
Regulatory Assets and Liabilities Disclosure [Abstract]  
Regulatory Matters REGULATORY MATTERS
Regulation
DTE Electric and DTE Gas are subject to the regulatory jurisdiction of the MPSC, which issues orders pertaining to rates, recovery of certain costs, including the costs of generating facilities and regulatory assets, conditions of service, accounting, and operating-related matters. DTE Electric is also regulated by the FERC with respect to financing authorization, wholesale electric market activities, certain affiliate transactions, the acquisition and disposition of certain generation and other facilities, and, in conjunction with the NERC, compliance with mandatory reliability standards. Regulation results in differences in the application of generally accepted accounting principles between regulated and non-regulated businesses.
The Registrants are unable to predict the outcome of any unresolved regulatory matters discussed herein. Resolution of these matters is dependent upon future MPSC and FERC orders and appeals, which may materially impact the Consolidated Financial Statements of the Registrants.
Regulatory Assets and Liabilities
DTE Electric and DTE Gas are required to record Regulatory assets and liabilities for certain transactions that would have been treated as revenue or expense in non-regulated businesses. Continued applicability of regulatory accounting treatment requires that rates be designed to recover specific costs of providing regulated services and be charged to and collected from customers. Future regulatory changes could result in the discontinuance of this accounting treatment for Regulatory assets and liabilities for some or all of the Registrants' businesses and may require the write-off of the portion of any Regulatory asset or liability that was no longer probable of recovery through regulated rates. Management believes that currently available facts support the continued use of Regulatory assets and liabilities and that all Regulatory assets and liabilities are recoverable or refundable in the current regulatory environment.
The following are balances and a brief description of the Registrants' Regulatory assets and liabilities at December 31:
DTE EnergyDTE Electric
2021202020212020
Assets(In millions)
Recoverable pension and other postretirement costs
Pension$1,372 $1,938 $1,056 $1,477 
Other postretirement costs53 165 27 108 
Recoverable undepreciated costs on retiring plants667 664 667 664 
Fermi 2 asset retirement obligation613 645 613 645 
Enhanced Tree Trimming Program deferred costs189 119 189 119 
Recoverable Michigan income taxes163 176 133 142 
Accrued PSCR/GCR revenue160 100 142 100 
Energy Waste Reduction incentive79 62 63 49 
Recoverable income taxes related to AFUDC equity68 64 61 54 
Deferred environmental costs51 57 — — 
Unamortized loss on reacquired debt51 55 38 41 
Customer360 deferred costs46 51 46 51 
Nuclear Performance Evaluation and Review Committee Tracker39 55 39 55 
Non-service pension and other postretirement costs25 21 — — 
Energy Waste Reduction20 19 — — 
Other recoverable income taxes16 19 16 19 
Transitional Reconciliation Mechanism8 11 8 11 
Other57 33 38 28 
3,677 4,254 3,136 3,563 
Less amount included in Current Assets(195)(129)(168)(123)
$3,482 $4,125 $2,968 $3,440 
DTE EnergyDTE Electric
2021202020212020
Liabilities(In millions)
Refundable federal income taxes$2,117 $2,255 $1,729 $1,827 
Removal costs liability679 831 283 410 
Negative other postretirement offset150 122 106 86 
Non-service pension and other postretirement costs110 78 54 36 
Incremental tree trim surge90 — 90 — 
COVID-19 voluntary refund30 30 30 30 
Energy Waste Reduction27 15 27 15 
Renewable energy13 21 13 21 
Other46 50 43 25 
3,262 3,402 2,375 2,450 
Less amount included in Current Liabilities(156)(39)(154)(18)
$3,106 $3,363 $2,221 $2,432 
As noted below, certain Regulatory assets for which costs have been incurred have been included (or are expected to be included, for costs incurred subsequent to the most recently approved rate case) in DTE Electric's or DTE Gas' rate base, thereby providing a return on invested costs (except as noted). Certain other Regulatory assets are not included in rate base but accrue recoverable carrying charges until surcharges to collect the assets are billed. Certain Regulatory assets do not result from cash expenditures and therefore do not represent investments included in rate base or have offsetting liabilities that reduce rate base.
ASSETS
•Recoverable pension and other postretirement costs — Accounting standards for pension and other postretirement benefit costs require, among other things, the recognition in Other comprehensive income of the actuarial gains or losses and the prior service costs that arise during the period but are not immediately recognized as components of net periodic benefit costs. DTE Electric and DTE Gas record the impact of actuarial gains or losses and prior service costs as Regulatory assets since the traditional rate setting process allows for the recovery of pension and other postretirement costs. The asset will reverse as the deferred items are amortized and recognized as components of net periodic benefit costs. Refer to Note 20 to the Consolidated Financial Statements, "Retirement Benefits and Trusteed Assets," for additional information regarding the changes in pension and other postretirement costs for the period and the impact on Regulatory assets.(a)
•Recoverable undepreciated costs on retiring plants — Deferral of estimated remaining balances associated with coal power plants expected to be retired by the end of 2022. Amounts also include $73 million for the remaining undepreciated cost of the River Rouge power plant, which was retired in 2021 and approved for securitization and recovery in the MPSC's June 2021 order. Refer to the "2021 Securitization Filing" section below for additional information.
•Fermi 2 asset retirement obligation — Obligation for Fermi 2 decommissioning costs. The asset captures the timing differences between expense recognition and current recovery in rates and will reverse over the remaining life of the related plant.(a)
•Enhanced Tree Trimming Program deferred costs — The MPSC approved the deferral of costs for a tree trimming surge through 2022, aimed at reducing the number and duration of customer interruptions.  The MPSC also approved the securitization and recovery of up to $157 million of these costs in their June 2021 order. Refer to the "2021 Securitization Filing" section below for additional information. Additional tree trim surge costs are expected to be recovered through future securitization filings. DTE Electric also requested continued deferral of tree trimming surge costs through 2024 in its January 21, 2022 rate case filing, with an MPSC order expected in November 2022.
•Recoverable Michigan income taxes — The State of Michigan enacted a corporate income tax resulting in the establishment of state deferred tax liabilities for DTE Energy's utilities.  Offsetting Regulatory assets were also recorded as the impacts of the deferred tax liabilities will be reflected in rates as the related taxable temporary differences reverse and flow through current income tax expense.
•Accrued PSCR/GCR revenue — Receivable for the temporary under-recovery of and carrying costs on fuel and purchased power costs incurred by DTE Electric which are recoverable through the PSCR mechanism and temporary under-recovery of and carrying costs on gas costs incurred by DTE Gas which are recoverable through the GCR mechanism.
•Energy Waste Reduction incentive — DTE Electric and DTE Gas operate MPSC approved energy waste reduction programs designed to reduce overall energy usage by their customers. The utilities are eligible to earn an incentive by exceeding statutory savings targets. The utilities have consistently exceeded the savings targets and recognize the incentive as a Regulatory asset in the period earned.(a)
•Recoverable income taxes related to AFUDC equity — Accounting standards for income taxes require recognition of a deferred tax liability for the equity component of AFUDC.  A Regulatory asset is required for the future increase in taxes payable related to the equity component of AFUDC that will be recovered from customers through future rates over the remaining life of the related plant.
•Deferred environmental costs — The MPSC approved the deferral of investigation and remediation costs associated with DTE Gas' former MGP sites. Amortization of deferred costs is over a ten-year period beginning in the year after costs were incurred, with recovery (net of any insurance proceeds) through base rate filings.(a)
•Unamortized loss on reacquired debt — The unamortized discount, premium, and expense related to debt redeemed with a refinancing are deferred, amortized, and recovered over the life of the replacement issue.
•Customer360 deferred costs — The MPSC approved the deferral and amortization of certain costs associated with implementing Customer360, an integrated software application that enables improved interface among customer service, billing, meter reading, credit and collections, device management, account management, and retail access. Amortization of deferred costs over a 15-year amortization period began after the billing system was put into operation during the second quarter of 2017. The deferred costs are recorded as Regulatory Assets at DTE Electric and DTE Gas receives an intercompany charge for their proportionate share of amortization expense.
•Nuclear Performance Evaluation and Review Committee Tracker — Deferral and amortization of certain costs associated with oversight and review of DTE Electric's nuclear power generation program, including safety and regulatory compliance, nuclear leadership, nuclear facilities, and operational and financial performance, pursuant to MPSC authorization. Deferrals are amortized over a five-year period with recovery through base rate filings.
•Non-service pension and other postretirement costs — Upon adoption of ASU 2017-07 on January 1, 2018, certain non-service pension and other postretirement costs are no longer capitalized into Property, Plant & Equipment. Such costs may be recorded to Regulatory assets for ratemaking purposes and recovered as amortization expense based on the composite depreciation rate for plant-in-service.
•Energy Waste Reduction — Receivable for the under-recovery of energy waste reduction costs incurred by DTE Gas which are recoverable through a surcharge.(a)
•Other recoverable income taxes — Income tax receivable from DTE Electric's customers representing the difference in property-related deferred income taxes and amounts previously reflected in DTE Electric's rates. This asset will reverse over the remaining life of the related plant.
•Transitional Reconciliation Mechanism — The MPSC approved the recovery of the deferred net incremental revenue requirement associated with the transition of PLD customers to DTE Electric's distribution system effective July 1, 2014. Annual reconciliations are filed and surcharges are implemented to recover approved amounts.
________________________________________________
(a)Regulatory assets not earning a return or accruing carrying charges.
LIABILITIES
•Refundable federal income taxes — In December 2017, the TCJA was enacted and reduced the corporate income tax rate, effective January 1, 2018. DTE Electric and DTE Gas remeasured deferred taxes, resulting in a reduction to deferred tax liabilities, to reflect the impact of the TCJA on the cumulative temporary differences expected to reverse after the effective date. Regulatory liabilities were also recorded to offset the impact of the deferred tax remeasurement reflected in rates.
•Removal costs liability — The amounts collected from customers to fund future asset removal activities in excess of removal costs incurred.
•Negative other postretirement offset — DTE Electric and DTE Gas' negative other postretirement costs are not included as a reduction to their authorized rates; therefore, DTE Electric and DTE Gas are accruing a Regulatory liability to eliminate the impact on earnings of the negative other postretirement expense accrual. The Regulatory liabilities will reverse to the extent DTE Electric and DTE Gas' other postretirement expense is positive in future years.
•Non-service pension and other postretirement costs — Upon adoption of ASU 2017-07 on January 1, 2018, certain non-service pension and other postretirement cost activity is no longer credited to Property, Plant & Equipment. Such costs may be recorded to Regulatory liabilities for ratemaking purposes and refunded through credits to amortization expense based on the composite depreciation rate for plant-in-service.
•Incremental tree trim surge — One-time voluntary refund to be administered by investing in tree trimming, incremental to the Enhanced Tree Trimming Program, without seeking future cost recovery. Refer to the “2020-2021 Accounting Applications” section below for additional information regarding the refund.
•COVID-19 voluntary refund — One-time refund obligation owed to DTE Electric customers due to certain sales increases driven by the COVID-19 pandemic. Amortization of the liability will be used to offset the cost of service related to new plant, beginning January 1, 2022 and continuing until the earlier of the implementation of new base rates or December 31, 2022.
•Energy Waste Reduction — Amounts collected in rates in excess of energy waste reduction costs incurred by DTE Electric.
•Renewable energy — Amounts collected in rates in excess of renewable energy expenditures.
2020-2021 Accounting Applications
On July 9, 2020, the MPSC approved DTE Electric's request to accelerate amortization of the portion of its refundable federal income taxes regulatory liability related to non-plant accumulated deferred income tax balances that resulted from the TCJA. DTE Electric was authorized to increase amortization by $102 million beginning in May 2021, which would fully amortize this portion of the liability by the end of 2021 instead of April 2033. The accelerated amortization would not impact customer rates and would allow DTE Electric to defer its next rate case filing previously set for July 2020 to March 2021.
On February 26, 2021, DTE Electric filed an additional application requesting a delay in the accelerated amortization approved in the 2020 application. DTE Electric requested delaying the start of amortization from May 2021 to December 1, 2021, which would fully amortize these balances by the end of 2022 and allow DTE Electric to further defer its next rate case filing. The accounting application was approved by the MPSC on April 8, 2021.
On August 31, 2021, DTE Electric filed an accounting application with the MPSC requesting approval of a one-time voluntary refund of $70 million collected in 2021 associated with the unexpected customer usage patterns due to the COVID-19 pandemic. This refund will be administered by investing in additional tree trimming without seeking future cost recovery. Such efforts would serve to improve customer reliability without impacting rates, thus providing an affordability benefit to customers. These investments will be incremental to the Tree Trim Surge expenses previously authorized by the MPSC.
On November 4, 2021, the MPSC issued an order authorizing the one-time accounting and a regulatory liability for a minimum of $70 million. In that order, the MPSC directed DTE Electric to file a letter before December 31, 2021 indicating the amount of the final regulatory liability it planned to record.
On December 27, 2021, DTE Electric submitted a letter to the MPSC substantiating that a regulatory liability of $90 million would be recorded. On December 28, 2021, the MPSC Staff confirmed that DTE Electric complied with the requirements set forth in the November 4th order. Accordingly, DTE Electric recognized the regulatory liability of $90 million and will relieve the liability as the additional tree trim expenses are incurred during 2022-2023. If the full $90 million is not spent by the end of 2023, DTE Electric will provide refunds to customers via bill credits for any shortage.
2021 Securitization Filing
On March 26, 2021, DTE Electric filed an application requesting a financing order approving the securitization financing of $184 million of qualified costs related to the net book value of the River Rouge generation plant and tree trimming surge program costs. The filing requested recovery of these qualifying costs from DTE Electric's customers.
A final MPSC financing order was issued on June 23, 2021 authorizing DTE Electric to proceed with the issuance of securitization bonds for qualified costs of up to $236 million, increased for the inclusion of deferred income taxes. The financing order further authorized customer charges for the timely recovery of the debt service costs on the securitization bonds and other ongoing qualified costs. Securitization financing is expected to occur in March 2022.
2021 Gas Rate Case Filing
DTE Gas filed a rate case with the MPSC on February 12, 2021 requesting an increase in base rates of $195 million based on a projected twelve-month period ending December 31, 2022. The requested increase in base rates was primarily due to an increase in net plant resulting from infrastructure investments and operating and maintenance expenses. The rate filing also requested an increase in return on equity from 9.9% to 10.25% and included projected changes in sales and working capital. On December 9, 2021, the MPSC issued an order approving an annual revenue increase of $84 million for services rendered on or after January 1, 2022 and a return on equity of 9.9%.
2022 Electric Rate Case Filing
DTE Electric filed a rate case with the MPSC on January 21, 2022 requesting an increase in base rates of $388 million based on a projected twelve-month period ending October 31, 2023. The requested increase in base rates is primarily due to an increase in net plant resulting from generation and distribution investments, as well as related increases to depreciation and property tax expenses. The rate filing also requested an increase in return on equity from 9.9% to 10.25% and includes projected changes in sales. A final MPSC order in this case is expected in November 2022.
v3.22.0.1
Income Taxes
 12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Income Taxes INCOME TAXES
Income Tax Summary
DTE Energy files a consolidated federal income tax return. DTE Electric is a part of the consolidated federal income tax return of DTE Energy. DTE Energy and its subsidiaries file consolidated and/or separate company income tax returns in various states and localities, including a consolidated return in the State of Michigan. DTE Electric is part of the Michigan consolidated income tax return of DTE Energy. The federal, state and local income tax expense for DTE Electric is determined on an individual company basis with no allocation of tax expenses or benefits from other affiliates of DTE Energy. DTE Electric had income tax receivables with DTE Energy of $31 million and $8 million at December 31, 2021 and 2020, respectively.
On July 1, 2021, DTE Energy completed the separation of its natural gas pipeline, storage and gathering non-utility business, DT Midstream. Refer to Note 4 to the Consolidated Financial Statements, "Dispositions and Impairments" for additional information regarding the separation. The separation was a tax free distribution to shareholders, but triggered certain tax effects at DTE Energy including the remeasurement of state deferred tax assets and liabilities and the recognition of a deferred intercompany gain. The state remeasurement reduced deferred tax liabilities and generated a deferred tax benefit of $85 million. The recognition of the deferred intercompany gain resulted in $9 million of additional deferred tax expense. Both of these impacts were reflected in Income Tax Expense (Benefit) in the Consolidated Statements of Operations for the year ended December 31, 2021.
The Registrants' total Income Tax Expense varied from the statutory federal income tax rate for the following reasons:
202120202019
DTE Energy(In millions)
Income Before Income Taxes$656 $1,082 $1,013 
Income tax expense at 21% statutory rate$138 $227 $213 
Production tax credits(138)(121)(128)
TCJA regulatory liability amortization(103)(76)(38)
State deferred tax remeasurement due to separation of DT Midstream, net of federal benefit(85)— — 
Investment tax credits(3)(4)(4)
Net operating loss carryback— (34)— 
Enactment of West Virginia income tax legislation, net of federal benefit8 — — 
Deferred intercompany gain9 — — 
Valuation allowance on charitable contribution carryforwards18 3 6 
State and local income taxes, excluding items above, net of federal benefit30 47 29 
Other, net(4)(5)(7)
Income Tax Expense (Benefit)$(130)$37 $71 
Effective income tax rate(19.9)%3.4 %7.0 %
202120202019
DTE Electric(In millions)
Income Before Income Taxes$970 $887 $854 
Income tax expense at 21% statutory rate$204 $186 $179 
TCJA regulatory liability amortization(73)(62)(35)
Production tax credits(70)(55)(45)
Investment tax credits(3)(4)(4)
State and local income taxes, excluding items above, net of federal benefit54 50 49 
Other, net(8)(6)(6)
Income Tax Expense$104 $109 $138 
Effective income tax rate10.7 %12.3 %16.2 %
Components of the Registrants' Income Tax Expense were as follows:
202120202019
DTE Energy(In millions)
Current income tax expense (benefit)
Federal$(33)$(249)$(183)
State and other income tax(12)4 3 
Total current income taxes(45)(245)(180)
Deferred income tax expense (benefit)
Federal(42)227 218 
State and other income tax(43)55 33 
Total deferred income taxes(85)282 251 
$(130)$37 $71 
202120202019
DTE Electric(In millions)
Current income tax expense (benefit)
Federal$(11)$15 $25 
State and other income tax(7)5 16 
Total current income taxes(18)20 41 
Deferred income tax expense
Federal47 30 51 
State and other income tax75 59 46 
Total deferred income taxes122 89 97 
$104 $109 $138 
Deferred tax assets and liabilities are recognized for the estimated future tax effect of temporary differences between the tax basis of assets or liabilities and the reported amounts in the Registrants' Consolidated Financial Statements.
The Registrants' deferred tax assets (liabilities) were comprised of the following at December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Property, plant, and equipment$(3,970)$(3,691)$(3,428)$(3,099)
Regulatory assets and liabilities(117)(102)(64)(53)
Tax credit carry-forwards1,260 1,144 379 278 
Pension and benefits310 310 282 264 
Federal net operating loss carry-forward199 109 5 — 
State and local net operating loss carry-forwards73 36 15 — 
Investments in equity method investees58 51 (1)— 
Other75 115 71 85 
(2,112)(2,028)(2,741)(2,525)
Less: Valuation allowance(51)(41)— — 
Long-term deferred income tax liabilities$(2,163)$(2,069)$(2,741)$(2,525)
Deferred income tax assets$2,224 $2,050 $988 $883 
Deferred income tax liabilities(4,387)(4,119)(3,729)(3,408)
$(2,163)$(2,069)$(2,741)$(2,525)
Tax credit carry-forwards for DTE Energy include $1.3 billion of general business credits that expire from 2032 through 2041. No valuation allowance is required for the tax credits carry-forward deferred tax asset.
DTE Energy has a pre-tax federal net operating loss carry-forward of $950 million as of December 31, 2021. The net operating loss carry-forwards generated in 2015 and 2016 will expire from 2035 through 2036, and the net operating loss carry-forward generated in 2018 and subsequent years will be carried forward indefinitely. No valuation allowance is required for the federal net operating loss deferred tax asset.
DTE Energy has state and local deferred tax assets related to net operating loss carry-forwards of $73 million and $36 million at December 31, 2021 and 2020, respectively. Most of the state and local net operating loss carry-forwards expire from 2022 through 2041 with the remainder being carried forward indefinitely.
DTE Energy has recorded valuation allowances of $51 million and $41 million at December 31, 2021 and 2020, respectively, including $29 million and $30 million for the respective periods related to the state net operating loss carryforwards noted above. The remaining valuation allowances related to charitable contribution carryforwards. The change in balances in 2021 includes establishing a valuation allowance of $18 million based on a change in expected ability to utilize certain of these charitable contributions carryforwards.
In assessing the realizability of deferred tax assets, DTE Energy considers whether it is more likely than not that some portion or all of the deferred tax assets will not be realized. The ultimate realization of deferred tax assets is dependent upon the generation of future taxable income during the periods in which those temporary differences become deductible.
Tax credit carry-forwards for DTE Electric include $379 million of general business credits that expire from 2036 through 2041. No valuation allowance is required for the tax credits carry-forward deferred tax asset.
DTE Electric has a pre-tax federal net operating loss carry-forward of $24 million as of December 31, 2021. The net operating loss carry-forward will be carried forward indefinitely. No valuation allowance is required for the federal net operating loss deferred tax asset.
DTE Electric has $15 million in state and local deferred tax assets related to net operating loss carry-forwards at December 31, 2021 which will expire in 2030 and 2031. DTE Electric had no state and local deferred tax assets related to net operating loss carry-forwards at December 31, 2020. No valuation allowance is required for the state and local net operating loss deferred tax assets.
The above tables exclude unamortized investment tax credits that are shown separately on the Registrants' Consolidated Statements of Financial Position. Investment tax credits are deferred and amortized to income over the average life of the related property.
Uncertain Tax Positions
A reconciliation of the beginning and ending amount of unrecognized tax benefits for the Registrants is as follows:
202120202019
DTE Energy(In millions)
Balance at January 1$10 $10 $10 
Additions for tax positions of prior years— — — 
Balance at December 31$10 $10 $10 
202120202019
DTE Electric(In millions)
Balance at January 1$13 $13 $13 
Additions for tax positions of prior years— — — 
Balance at December 31$13 $13 $13 
If recognized, all of the Registrants' unrecognized tax benefits would favorably impact their effective tax rate in future years. The Registrants do not anticipate any material decrease in unrecognized tax benefits in the next twelve months.
The Registrants recognize interest and penalties pertaining to income taxes in Interest expense and Other expenses, respectively, on the Consolidated Statements of Operations.
Accrued interest pertaining to income taxes for DTE Energy totaled $5 million at December 31, 2021 and 2020. DTE Energy recognized a nominal amount of interest expense related to income taxes in 2021 and $1 million in 2020 and 2019. DTE Energy has not accrued any penalties pertaining to income taxes.
Accrued interest pertaining to income taxes for DTE Electric totaled $7 million at December 31, 2021 and $6 million at December 31, 2020. DTE Electric recognized interest expense related to income taxes of $1 million in 2021, 2020, and 2019. DTE Electric has not accrued any penalties pertaining to income taxes.
In 2021, DTE Energy, including DTE Electric, settled a federal tax audit for the 2019 tax year. DTE Energy's federal income tax returns for 2020 and subsequent years remain subject to examination by the IRS. DTE Energy's Michigan Business Tax returns for the years 2008-2011 and Michigan Corporate Income Tax returns for the year 2017 and subsequent years remain subject to examination by the State of Michigan. DTE Energy also files tax returns in numerous state and local jurisdictions with varying statutes of limitation.
v3.22.0.1
Earnings Per Share
 12 Months Ended
Dec. 31, 2021
Earnings Per Share [Abstract]  
Earnings Per Share EARNINGS PER SHARE
Basic earnings per share is calculated by dividing 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. For additional information, see Notes 14 and 21 to the Consolidated Financial Statements, "Long-Term Debt" and "Stock-Based Compensation," respectively.
The following is a reconciliation of DTE Energy's basic and diluted income per share calculation for the years ended December 31:
202120202019
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations$796 $1,054 $955 
Less: Allocation of earnings to net restricted stock awards(2)(2)(2)
$794 $1,052 $953 
Net Income Attributable to DTE Energy Company — discontinued operations111 314 214 
Net income available to common shareholders — basic$905 $1,366 $1,167 
Average number of common shares outstanding — basic193 193 185 
Income from continuing operations$4.11 $5.46 $5.16 
Income from discontinued operations0.57 1.63 1.16 
Basic Earnings per Common Share$4.68 $7.09 $6.32 
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations$796 $1,054 $955 
Less: Allocation of earnings to net restricted stock awards(2)(2)(2)
$794 $1,052 $953 
Net Income Attributable to DTE Energy Company — discontinued operations111 314 214 
Net income available to common shareholders — diluted$905 $1,366 $1,167 
Average number of common shares outstanding — basic193 193 185 
    Average dilutive equity units and performance share awards1 — — 
Average number of common shares outstanding — diluted194 193 185 
Income from continuing operations$4.10 $5.45 $5.15 
Income from discontinued operations0.57 1.63 1.16 
Diluted Earnings per Common Share(a)
$4.67 $7.08 $6.31 
_______________________________________
(a)Equity units excluded from the calculation of diluted EPS were approximately 11.5 million for the year ended December 31, 2021 and 10.3 million for the years ended December 31, 2020 and 2019, respectively, as the dilutive stock price threshold was not met. For more information regarding equity units, see Note 14 to the Consolidated Financial Statements, "Long-Term Debt."
v3.22.0.1
Fair Value
 12 Months Ended
Dec. 31, 2021
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 December 31, 2021 and 2020. 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:
December 31, 2021December 31, 2020
Level 1Level 2Level 3
Other
(a)
Netting
(b)
Net BalanceLevel 1Level 2Level 3
Other
(a)
Netting
(b)
Net Balance
(In millions)
Assets
Cash equivalents(c)
$4 $— $— $— $— $4 $438 $— $— $— $— $438 
Nuclear decommissioning trusts
Equity securities917 — — 190 — 1,107 947 — — 222 — 1,169 
Fixed income securities124 418 — 102 — 644 102 371 — 82 — 555 
Private equity and other— — — 205 — 205 — — — 104 — 104 
Hedge funds and similar investments58 18 — — — 76 — — — — — — 
Cash equivalents39 — — — — 39 27 — — — — 27 
Other investments(d)
Equity securities68 — — — — 68 55 — — — — 55 
Fixed income securities7 — — — — 7 8 — — — — 8 
Cash equivalents86 — — — — 86 97 — — — — 97 
Derivative assets
Commodity contracts(e)
Natural gas273 115 66 — (394)60 99 74 60 — (156)77 
Electricity— 500 143 — (441)202 — 128 52 — (120)60 
Environmental & Other— 285 9 — (285)9 — 150 4 — (135)19 
Total derivative assets273 900 218 — (1,120)271 99 352 116 — (411)156 
Total$1,576 $1,336 $218 $497 $(1,120)$2,507 $1,773 $723 $116 $408 $(411)$2,609 
Liabilities
Derivative liabilities
Commodity contracts(e)
Natural gas$(177)$(172)$(245)$— $347 $(247)$(88)$(59)$(76)$— $151 $(72)
Electricity— (434)(188)— 443 (179)— (126)(42)— 125 (43)
Environmental & Other— (288)— — 288 — — (137)— — 129 (8)
Foreign currency exchange contracts— (4)— — — (4)— (5)— — — (5)
Total$(177)$(898)$(433)$— $1,078 $(430)$(88)$(327)$(118)$— $405 $(128)
Net Assets (Liabilities) at end of period$1,399 $438 $(215)$497 $(42)$2,077 $1,685 $396 $(2)$408 $(6)$2,481 
Assets
Current$227 $646 $166 $— $(854)$185 $532 $260 $92 $— $(330)$554 
Noncurrent1,349 690 52 497 (266)2,322 1,241 463 24 408 (81)2,055 
Total Assets$1,576 $1,336 $218 $497 $(1,120)$2,507 $1,773 $723 $116 $408 $(411)$2,609 
Liabilities
Current$(168)$(609)$(260)$— $799 $(238)$(84)$(223)$(79)$— $318 $(68)
Noncurrent(9)(289)(173)— 279 (192)(4)(104)(39)— 87 (60)
Total Liabilities$(177)$(898)$(433)$— $1,078 $(430)$(88)$(327)$(118)$— $405 $(128)
Net Assets (Liabilities) at end of period$1,399 $438 $(215)$497 $(42)$2,077 $1,685 $396 $(2)$408 $(6)$2,481 
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
(b)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.
(c)Amounts consisted of $1 million and $2 million of cash equivalents included in Restricted cash on DTE Energy's Consolidated Statements of Financial Position at December 31, 2021 and December 31, 2020, respectively. All other amounts are included in Cash and cash equivalents on the Consolidated Statements of Financial Position.
(d)Excludes cash surrender value of life insurance investments.
(e)For contracts with a clearing agent, DTE Energy nets all activity across commodities. This can result in some individual commodities having a contra balance.
The following table presents assets for DTE Electric measured and recorded at fair value on a recurring basis as of:
December 31, 2021December 31, 2020
Level 1Level 2Level 3
Other(a)
Net Balance Level 1Level 2Level 3
Other(a)
Net Balance
(In millions)
Assets
Cash equivalents$— $— $— $— $— $4 $— $— $— $4 
Nuclear decommissioning trusts
Equity securities917 — — 190 1,107 947 — — 222 1,169 
Fixed income securities124 418 — 102 644 102 371 — 82 555 
Private equity and other— — — 205 205 — — — 104 104 
Hedge funds and similar investments58 18 — — 76 — — — — — 
Cash equivalents39 — — — 39 27 — — — 27 
Other investments
Equity securities20 — — — 20 16 — — — 16 
Fixed income securities— — — — — — — — — — 
Cash equivalents11 — — — 11 11 — — — 11 
Derivative assets — FTRs— — 9 — 9 — — 4 — 4 
Total$1,169 $436 $9 $497 $2,111 $1,107 $371 $4 $408 $1,890 
Assets
Current$— $— $9 $— $9 $4 $— $4 $— $8 
Noncurrent1,169 436 — 497 2,102 1,103 371 — 408 1,882 
Total Assets$1,169 $436 $9 $497 $2,111 $1,107 $371 $4 $408 $1,890 
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
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 limited partnerships, including private equity, private real estate and private credit. 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 $199 million and $183 million as of December 31, 2021 and 2020, respectively.
Hedge funds and similar investments utilize a diversified group of strategies that attempt to capture uncorrelated sources of return. These investments include publicly traded mutual funds that are valued using quoted prices in actively traded markets, as well as insurance-linked and asset-backed securities and that are valued using quotations from broker or pricing services.
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:
Year Ended December 31, 2021Year Ended December 31, 2020
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of January 1$(16)$10 $4 $(2)$(15)$16 $3 $4 
Transfers from Level 3 into Level 2— — — — (2)— — (2)
Total gains (losses)
Included in earnings(a)
(343)54 — (289)(75)113 (7)31 
Recorded in Regulatory liabilities— — 19 19 — — 20 20 
Purchases, issuances, and settlements:
Settlements180 (109)(14)57 76 (119)(12)(55)
Net Assets (Liabilities) as of December 31$(179)$(45)$9 $(215)$(16)$10 $4 $(2)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31(a)
$(208)$4 $(72)$(276)$(4)$70 $(70)$(4)
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31$— $— $9 $9 $— $— $4 $4 
_______________________________________
(a)Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, gas, and other — 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:
Year Ended December 31,
20212020
(In millions)
Net Assets as of January 1$4 $3 
Total gains recorded in Regulatory liabilities19 20 
Purchases, issuances, and settlements:
Settlements(14)(19)
Net Assets as of December 31$9 $4 
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31$9 $4 
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 years ended December 31, 2021 and 2020.
The following tables present the unobservable inputs related to DTE Energy's Level 3 assets and liabilities:
December 31, 2021
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$66 $(245)Discounted Cash FlowForward basis price (per MMBtu)$(1.36)—$3.82 /MMBtu$(0.04)/MMBtu
Electricity$143 $(188)Discounted Cash FlowForward basis price (per MWh)$(12)—$7 /MWh$(2)/MWh
December 31, 2020
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$60 $(76)Discounted Cash FlowForward basis price (per MMBtu)$(0.86)—$2.50 /MMBtu$(0.07)/MMBtu
Electricity$52 $(42)Discounted Cash FlowForward basis price (per MWh)$(9)—$6 /MWh$— /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:
December 31, 2021December 31, 2020
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable(a), excluding lessor finance leases
$150 $— $— $167 $141 $— $— $141 
Short-term borrowings$758 $— $758 $— $38 $— $38 $— 
Notes payable(b)
$27 $— $— $27 $19 $— $— $19 
Long-term debt(c)
$17,378 $2,284 $15,425 $1,207 $19,439 $2,547 $18,230 $1,397 
_______________________________________
(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 and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs.
The following table presents the carrying amount and fair value of financial instruments for DTE Electric:
December 31, 2021December 31, 2020
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a)
$17 $— $— $17 $16 $— $— $16 
Short-term borrowings — affiliates$53 $— $— $53 $101 $— $— $101 
Short-term borrowings — other$153 $— $153 $— $— $— $— $— 
Notes payable(b)
$27 $— $— $27 $17 $— $— $17 
Long-term debt(c)
$8,907 $— $9,898 $150 $8,236 $— $9,579 $379 
_______________________________________
(a)Included in Current 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 and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs.
For further fair value information on financial and derivative instruments, see Note 13 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. See Note 8 to the Consolidated Financial Statements, "Asset Retirement Obligations."
The following table summarizes DTE Electric's fair value of the nuclear decommissioning trust fund assets:
December 31,
20212020
(In millions)
Fermi 2$2,051 $1,841 
Fermi 13 3 
Low-level radioactive waste17 11 
$2,071 $1,855 
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:
Year Ended December 31,
202120202019
(In millions)
Realized gains$95 $192 $56 
Realized losses$(12)$(111)$(31)
Proceeds from sale of securities$1,047 $2,350 $788 
Realized gains and losses from the sale of securities and unrealized gains and losses incurred by the Fermi 2 trust are recorded to Regulatory assets and the 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:
December 31, 2021December 31, 2020
Fair
Value		Unrealized
Gains		Unrealized LossesFair
Value		Unrealized
Gains		Unrealized Losses
(In millions)
Equity securities$1,107 $546 $(9)$1,169 $468 $(6)
Fixed income securities644 23 (6)555 22 (1)
Private equity and other205 58 (8)104 11 — 
Hedge funds and similar investments76 1 (2)— — — 
Cash equivalents39 — — 27 — — 
$2,071 $628 $(25)$1,855 $501 $(7)
The following table summarizes the fair value of the fixed income securities held in nuclear decommissioning trust funds by contractual maturity:
December 31, 2021
(In millions)
Due within one year$20 
Due after one through five years135 
Due after five through ten years109 
Due after ten years278 
$542 
Fixed income securities held in nuclear decommissioning trust funds include $102 million of non-publicly traded commingled funds that do not have a contractual maturity date.
Other Securities
At December 31, 2021 and 2020, 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 the Registrants' gains (losses) related to the trust:
Year Ended December 31,
202120202019
(In millions)
Gains (losses) related to equity securities$7 $(1)$27 
Gains (losses) related to fixed income securities— (2)10 
$7 $(3)$37 
v3.22.0.1
Financial and Other Derivative Instruments
 12 Months Ended
Dec. 31, 2021
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, some 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 2024. 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.
DTE Vantage — This segment manages and operates renewable gas recovery projects, industrial energy projects, reduced emissions fuel projects, 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 December 31, 2021 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:
December 31, 2021December 31, 2020
Derivative
Assets		Derivative
Liabilities		Derivative
Assets		Derivative
Liabilities
(In millions)
Derivatives designated as hedging instruments
Foreign currency exchange contracts$— $(4)$— $(4)
Derivatives not designated as hedging instruments
Commodity contracts
Natural gas$454 $(594)$233 $(223)
Electricity643 (622)180 (168)
Environmental & Other294 (288)154 (137)
Foreign currency exchange contracts— — — (1)
Total derivatives not designated as hedging instruments$1,391 $(1,504)$567 $(529)
Current$1,035 $(1,037)$446 $(386)
Noncurrent356 (471)121 (147)
Total derivatives$1,391 $(1,508)$567 $(533)
The fair value of derivative instruments at DTE Electric was $9 million and $4 million at December 31, 2021 and 2020, respectively, comprised of FTRs recorded to Other current assets on the Consolidated Statements of Financial Position and not designated as hedging instruments.
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 $18 million outstanding at December 31, 2021 and $7 million at December 31, 2020, 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 $37 million and $9 million at December 31, 2021 and 2020, respectively. Such balances of letters of credit are excluded from the tables below and are not netted with the recognized assets and liabilities in DTE Energy's Consolidated Statements of Financial Position.
For contracts with certain clearing agents, the fair value of derivative instruments is netted against realized positions with the net balance reflected as either 1) a Derivative asset or liability or 2) an Account receivable or payable. Other than certain clearing agents, Accounts receivable and Accounts payable that are subject to netting arrangements have not been offset against the fair value of Derivative assets and liabilities.
The following table presents net cash collateral offsetting arrangements for DTE Energy:
December 31,
20212020
(In millions)
Cash collateral netted against Derivative assets$(90)$(12)
Cash collateral netted against Derivative liabilities48 6 
Cash collateral recorded in Accounts receivable(a)
55 14 
Cash collateral recorded in Accounts payable(a)
(21)(1)
Total net cash collateral posted (received)$(8)$7 
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
December 31, 2021December 31, 2020
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$454 $(394)$60 $233 $(156)$77 
Electricity643 (441)202 180 (120)60 
Environmental & Other294 (285)9 154 (135)19 
Total derivative assets$1,391 $(1,120)$271 $567 $(411)$156 
Derivative liabilities
Commodity contracts
Natural gas$(594)$347 $(247)$(223)$151 $(72)
Electricity(622)443 (179)(168)125 (43)
Environmental & Other(288)288 — (137)129 (8)
Foreign currency exchange contracts(4)— (4)(5)— (5)
Total derivative liabilities$(1,508)$1,078 $(430)$(533)$405 $(128)
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:
December 31, 2021December 31, 2020
Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
CurrentNoncurrentCurrentNoncurrentCurrentNoncurrentCurrentNoncurrent
(In millions)
Total fair value of derivatives$1,035 $356 $(1,037)$(471)$446 $121 $(386)$(147)
Counterparty netting(791)(239)791 239 (318)(81)318 81 
Collateral adjustment(63)(27)8 40 (12)— — 6 
Total derivatives as reported$181 $90 $(238)$(192)$116 $40 $(68)$(60)
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 Years Ended December 31,
202120202019
(In millions)
Commodity contracts
Natural gasOperating Revenues — Non-utility operations $(224)$(70)$44 
Natural gasFuel, purchased power, gas, and other — non-utility(89)20 (5)
ElectricityOperating Revenues — Non-utility operations 169 91 44 
Environmental & OtherOperating Revenues — Non-utility operations (40)(118)(26)
Foreign currency exchange contractsOperating Revenues — Non-utility operations — (6)(2)
Total$(184)$(83)$55 
Revenues and energy costs related to trading contracts are presented on a net basis in DTE Energy's Consolidated Statements of Operations. Commodity derivatives used for trading purposes, and financial non-trading commodity derivatives, are accounted for using the MTM method with unrealized and realized gains and losses recorded in Operating Revenues — Non-utility operations. Non-trading physical commodity sale and purchase derivative contracts are generally accounted for using the MTM method with unrealized and realized gains and losses for sales recorded in Operating Revenues — Non-utility operations and purchases recorded in Fuel, purchased power, gas, and other — non-utility.
The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of December 31, 2021:
CommodityNumber of Units
Natural gas (MMBtu)2,139,606,569 
Electricity (MWh)32,140,743 
Foreign currency exchange ($ CAD)116,073,431 
Renewable Energy Certificates (MWh)7,711,766 
Carbon emissions (Metric Ton)1,142,009 
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 December 31, 2021, 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 $667 million.
As of December 31, 2021, DTE Energy had $1.3 billion of derivatives in net liability positions, for which hard triggers exist. There is $8 million of 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 $1.0 billion. The net remaining amount of $232 million is derived from the $667 million noted above.
v3.22.0.1
Long-Term Debt
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Long-Term Debt LONG-TERM DEBT
Long-Term Debt
DTE Energy's long-term debt outstanding and weighted average interest rates of debt outstanding at December 31 were:
Interest Rate(a)
Maturity Date20212020
(In millions)
Mortgage bonds, notes, and other
DTE Energy Debt, Unsecured2.1%2022 — 2030$5,555 $8,175 
DTE Electric Debt, Principally Secured3.7%2022 — 20518,988 8,308 
DTE Gas Debt, Principally Secured3.9%2023 — 20512,065 1,910 
16,608 18,393 
Unamortized debt discount(23)(25)
Unamortized debt issuance costs(90)(104)
Long-term debt due within one year(2,866)(462)
$13,629 $17,802 
Junior Subordinated Debentures
Subordinated Debentures4.8%2077 — 2081$910 $1,210 
Unamortized debt issuance costs(27)(35)
$883 $1,175 
_______________________________________
(a)Weighted average interest rate as of December 31, 2021.
DTE Electric's long-term debt outstanding and weighted average interest rates of debt outstanding at December 31 were:
Interest Rate(a)
Maturity Date20212020
(In millions)
Mortgage bonds, notes, and other
Long Term Debt, Principally Secured3.7%2022 — 2051$8,988 $8,308 
Unamortized debt discount(19)(16)
Unamortized debt issuance costs(62)(56)
Long-term debt due within one year(316)(462)
$8,591 $7,774 
_______________________________________
(a)Weighted average interest rate as of December 31, 2021.
Debt Issuances
In 2021, the following debt was issued:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricMarch
Mortgage bonds(a)
1.90%2028$575 
DTE ElectricMarch
Mortgage bonds(a)
3.25%2051425 
DT MidstreamJune
Senior notes(b)
4.125%20291,100 
DT MidstreamJune
Senior notes(b)
4.375%20311,000 
DT MidstreamJune
Term loan facility(b)
Variable20281,000 
DTE GasNovember
Mortgage bonds(c)
2.07%203160 
DTE GasNovember
Mortgage bonds(c)
2.85%205195 
DTE EnergyNovember
Junior subordinated debentures(d)
4.375%2081280 
$4,535 
_______________________________________
(a)Bonds were issued as Green Bonds and the proceeds will be used to finance qualified expenditures for solar and wind energy, payments under power purchase agreements for solar and wind energy, and energy optimization programs.
(b)Proceeds used for the repayment of short-term borrowings due to DTE Energy to facilitate the separation of DT Midstream, as well as a one-time special dividend provided to DTE Energy. The debt was transferred to DT Midstream upon its separation on July 1, 2021. Refer to Note 4 to the Consolidated Financial Statements, “Dispositions and Impairments,” for additional information and to the Debt Redemptions section below for DTE Energy's use of the proceeds received from DT Midstream.
(c)Proceeds used for the repayment of short-term borrowings and general corporate purposes, including capital expenditures.
(d)Proceeds used for the repayment of $280 million of DTE Energy's 2016 Series F 6.00% Junior Subordinated Debentures due 2076.
In September 2021, DTE Electric completed a mandatory remarketing of $82 million of 1.45% Tax-Exempt Revenue Bonds at the same rate of 1.45% until maturity in 2030 and $59 million of 1.45% Tax-Exempt Revenue Bonds at a rate of 1.35% until maturity in 2029.
Debt Redemptions
In 2021, the following debt was redeemed:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricAprilMortgage bonds3.90%2021$250 
DTE ElectricMayMortgage bonds7.00%202133 
DTE EnergyJune
Junior subordinated debentures(a)
5.375%2076300 
DTE EnergyJulySenior notes3.30%2022300 
DTE EnergyJulySenior notes2.60%2022300 
DTE EnergyJulySenior notes3.70%2023600 
DTE EnergyJulySenior notes3.85%2023135 
DTE EnergyJulySenior notes3.50%2024350 
DTE EnergyJulySenior notes3.80%2027350 
DTE EnergyJulySenior notes3.40%202921 
DTE EnergyJulySenior notes6.375%2033191 
DTE EnergyAugustSenior notes3.85%2023165 
DTE EnergyAugustSenior notes6.375%2033209 
DTE ElectricAugustMortgage bonds6.90%202138 
DTE EnergyDecember
Junior subordinated debentures(a)
6.00%2076280 
$3,522 
_______________________________________
(a)Early redemptions and the write-off of unamortized issuance costs resulted in a total loss on extinguishment of debt of $17 million for the year ended December 31, 2021, including $8 million for the June redemption and $9 million for the December redemption.
During the third quarter 2021, DTE Energy optionally redeemed $2.6 billion of Senior Notes included in the table above using proceeds from DT Midstream's repayment of short-term borrowings and one-time special dividend. To early retire this debt and reduce future interest expense, DTE Energy incurred prepayment costs of $361 million and wrote off $15 million of unamortized issuance costs and discounts related to the debt. These amounts have been included within the Loss on extinguishment of debt line item within the Consolidated Statements of Operations for the year ended December 31, 2021.
The following table shows the Registrants' scheduled debt maturities, excluding any unamortized discount on debt:
202220232024202520262027 and ThereafterTotal
(In millions)
DTE Energy(a)
$2,866 $277 $1,075 $1,220 $777 $11,302 $17,517 
DTE Electric$316 $202 $400 $350 $177 $7,543 $8,988 
_______________________________________
(a)Amounts include DTE Electric's scheduled debt maturities.
The following table shows scheduled interest payments related to the Registrants' long-term debt:
202220232024202520262027 and ThereafterTotal
(In millions)
DTE Energy(a)
$575 $548 $529 $494 $450 $7,510 $10,106 
DTE Electric$330 $322 $305 $292 $284 $4,222 $5,755 
_______________________________________
(a)Amounts include DTE Electric's scheduled interest payments.
Junior Subordinated Debentures
DTE Energy has the right to defer interest payments on the Junior Subordinated Debentures. Should DTE Energy exercise this right, it cannot declare or pay dividends on, or redeem, purchase or acquire, any of its capital stock during the deferral period. Any deferred interest payments will bear additional interest at the rate associated with the related debt issue. As of December 31, 2021, no interest payments have been deferred on the Junior Subordinated Debentures.
Cross Default Provisions
Substantially all of the net utility properties of DTE Electric and DTE Gas are subject to the lien of mortgages. Should DTE Electric or DTE Gas fail to timely pay their indebtedness under these mortgages, such failure may create cross defaults in the indebtedness of DTE Energy.
Acquisition Financing
In December 2019, DTE Energy closed on the purchase of midstream natural gas assets. The acquisition was financed through the issuance of Senior Notes, common stock, and $1.3 billion of equity units. Each equity unit has a stated amount of $50 and was initially issued in the form of a Corporate Unit, comprised of (i) a forward purchase contract to buy DTE Energy common stock (stock purchase contract) and (ii) a 1/20 undivided beneficial ownership interest in a $1,000 principal amount of DTE Energy’s 2019 Series F 2.25% RSNs due 2025. The RSN debt instruments and the stock purchase contract equity instruments are deemed to be separate instruments as the investor may trade the RSNs separately from the stock purchase contracts and may also settle the stock purchase contracts separately. The Corporate Units are listed on the New York Stock Exchange under the symbol DTP.
The stock purchase contract obligates the holder to purchase from DTE Energy on the settlement date, November 1, 2022, for a price of $50 per stock purchase contract, a certain number of shares of DTE Energy's common stock. As a result of the separation of DT Midstream in July 2021, there was a change in the settlement rates in the stock purchase contract to reflect the dividend of DT Midstream stock to DTE Energy shareholders. As adjusted for this change, anti-dilution adjustments to date, and subject to future anti-dilution adjustments, the following number of shares must be purchased:
•if the AMV of DTE Energy’s common stock, which is the average volume-weighted average price of DTE Energy’s common stock for the trading days during the 20 consecutive scheduled trading day period ending on the third scheduled trading day immediately preceding the stock purchase contract settlement date, is equal to or greater than $133.08, 0.3757 shares of common stock;
•if the AMV is less than $133.08 but greater than $106.50, a number of shares of common stock equal to $50 divided by the AMV; and
•if the AMV is less than or equal to $106.50, 0.4695 shares of common stock.
The RSNs bear interest at a rate of 2.25% per year, payable quarterly, and mature on November 1, 2025. The RSNs will be remarketed in 2022. If this remarketing is successful, the interest rate on the RSNs will be reset, and interest thereafter will be payable semi-annually at the reset rate. If there is no successful remarketing, the interest rate on the RSNs will not be reset. The holders of the RSNs would have the right to put the RSNs to DTE Energy at a price equal to 100% of the principal amount, and the proceeds of the put right would be deemed to have been applied against the holders’ obligation under the stock purchase contracts. DTE Energy may also redeem, in whole or in part, the RSNs in the event of a failed final remarketing.
The present value of the future contract adjustment payments of $150 million was recorded as a reduction of shareholders’ equity, offset by the stock purchase contract liability. The stock purchase contract liability is included in Current Liabilities — Other and Other Liabilities —Other on DTE Energy’s Consolidated Statements of Financial Position. On February 1, 2020, DTE Energy began paying the stock purchase contract holders quarterly contract adjustment payments at a rate of 4% per year of the stated amount of $50 per equity unit, or $2 per year. Interest payments on the RSNs are being recorded as Interest expense and stock purchase contract payments are being charged against the liability. Accretion of the stock purchase contract liability is recorded as imputed Interest expense.
The treasury stock method is used to compute diluted EPS for the stock purchase contract. Under the treasury stock method, the stock purchase contract will only have a dilutive effect when the settlement rate is based on the market value of DTE’s common stock that is greater than $133.08 (the threshold appreciation price). At December 31, 2021, the stock purchase price contract was anti-dilutive and, therefore, not included in the computation of diluted earnings per share.
If payments for the stock purchase contract are deferred, DTE Energy may not make any cash distributions related to its capital stock, including dividends, redemptions, repurchases, liquidation payments or guarantee payments. Also, during the deferral period, DTE Energy may not make any payments on or redeem or repurchase any debt securities that are equal in right of payment with, or subordinated to, the RSNs.
Until settlement of the stock purchase contracts, the shares of stock underlying each contract are not outstanding. Under the terms of the stock purchase contracts, assuming no anti-dilution or other adjustments, DTE Energy will issue between 9.8 million and 12.2 million shares of its common stock in November 2022. A total of 13 million shares of DTE Energy’s common stock have been reserved for issuance in connection with the stock purchase contracts.
Selected information about DTE Energy’s equity units is presented below:
Issuance DateUnits IssuedTotal Net ProceedsTotal Long-Term DebtRSN Annual Interest RateStock Purchase Contract Annual RateStock Purchase Settlement Date
Stock Purchase Contract Liability(a)
RSN Maturity Date
(In millions, except interest rates)
11/1/1926$1,265 $1,300 2.25%4.0%11/1/2022$150 11/1/2025
_______________________________________
(a)Payments of $50 million and $49 million were made in 2021 and 2020, respectively. The stock purchase contract liability was $51 million and $101 million as of December 31, 2021 and 2020, respectively, exclusive of interest.
v3.22.0.1
Preferred and Preference Securities
 12 Months Ended
Dec. 31, 2021
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]  
Preferred and Preference Securities PREFERRED AND PREFERENCE SECURITIES
As of December 31, 2021, the amount of authorized and unissued stock is as follows:
CompanyType of StockPar ValueShares Authorized
DTE EnergyPreferred$— 5,000,000 
DTE ElectricPreferred$100 6,747,484 
DTE ElectricPreference$1 30,000,000 
DTE GasPreferred$1 7,000,000 
DTE GasPreference$1 4,000,000 
v3.22.0.1
Short-Term Credit Arrangements and Borrowings
 12 Months Ended
Dec. 31, 2021
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.
In December 2021, DTE Energy entered into a $400 million unsecured term loan to raise additional liquidity, with terms consistent with the unsecured revolving credit agreements. No amount has been drawn as of December 31, 2021 and the loan will expire in June 2022.
The unsecured revolving credit agreements have historically required 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 June 2021, DTE Energy amended its total funded debt to capitalization ratio requirement to no more than 0.70 to 1 starting with the third quarter of 2021 and ending December 2022. The amendment was a result of temporary balance sheet impacts resulting from the separation of DT Midstream on July 1, 2021. 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 December 31, 2021, the total funded debt to total capitalization ratios for DTE Energy, DTE Electric, and DTE Gas were 0.66 to 1, 0.51 to 1, and 0.48 to 1, respectively, and were in compliance with this financial covenant.
The availability under the facilities in place at December 31, 2021 is shown in the following table:
DTE EnergyDTE ElectricDTE GasTotal
(In millions)
Unsecured revolving credit facility, expiring April 2025(a)
$1,500 $500 $300 $2,300 
Unsecured term loan, expiring June 2022400 — — 400 
Unsecured Canadian revolving credit facility, expiring May 202387 — — 87 
Unsecured letter of credit facility, expiring February 2023150 — — 150 
Unsecured letter of credit facility, expiring July 202370 — — 70 
Unsecured letter of credit facility(b)
50 — — 50 
2,257 500 300 3,057 
Amounts outstanding at December 31, 2021
Revolver borrowings75 — — 75 
Commercial paper issuances320 153 210 683 
Letters of credit258 — — 258 
653 153 210 1,016 
Net availability at December 31, 2021$1,604 $347 $90 $2,041 
_______________________________________
(a)Total availability of $102 million expires in April 2024, including $67 million at DTE Energy, $22 million at DTE Electric, and $13 million at DTE Gas. All other availability expires in April 2025.
(b)Uncommitted letter of credit facility with automatic renewal provision for each July and therefore no expiration.
For DTE Energy, the weighted average interest rate for short-term borrowings was 0.3% and 1.1% at December 31, 2021 and 2020, respectively. For DTE Electric, the weighted average interest rate for short-term borrowings was 0.2% at December 31, 2021. There were no short-term borrowings outstanding as of December 31, 2020.
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 $50 million with an indefinite term and an agreement for up to $150 million currently contracted through 2022 and subject to renewal. The $50 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 December 31, 2021, the capacity under these facilities was $250 million. The amount outstanding under these agreements was $103 million and $49 million at December 31, 2021 and 2020, respectively, and was fully offset by the posted collateral.
Dividend Restrictions
Certain of DTE Energy’s credit facilities contain a provision requiring DTE Energy to maintain a total funded debt to capitalization ratio, as defined in the agreements, of no more than 0.65 to 1, which has the effect of limiting the amount of dividends DTE Energy can pay in order to maintain compliance with this provision. As noted above, the total funded debt to capitalization ratio has been temporarily increased to 0.70 to 1 through December 2022. At December 31, 2021, the effect of this provision was a restriction on dividend payments to no more than $1.4 billion of DTE Energy's Retained earnings of $3.4 billion. There are no other effective limitations with respect to DTE Energy’s ability to pay dividends.
v3.22.0.1
Leases
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Leases LEASES
Lessee
Leases at DTE Energy are primarily comprised of various forms of equipment, computer hardware, coal railcars, production facilities, buildings, and certain easement leases with terms ranging from approximately 2 to 40 years. Leases at DTE Electric are primarily comprised of various forms of equipment, computer hardware, coal railcars, and certain easement leases with terms ranging from approximately 2 to 40 years.
A lease is deemed to exist when the Registrants have the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration paid. The right to control is deemed to occur when the Registrants have the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Lease liabilities are determined utilizing a discount rate to determine the present values of lease payments. Topic 842 requires the use of the rate implicit in the lease when it is readily determinable. When the rate implicit in the lease is not readily determinable, the incremental borrowing rate is used. The Registrants have determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. The incremental borrowing rates for DTE Electric and DTE Gas have been determined utilizing respective secured borrowing rates for first mortgage bonds with like tenors of remaining lease terms. Incremental borrowing rates for non-utility entities have been determined utilizing an implied secured borrowing rate based upon an unsecured rate for a similar tenor of remaining lease terms, which is then adjusted for the estimated impact of collateral.
Certain leases of the Registrants contain escalation clauses whereby the payments are adjusted for consumer price or labor indices. DTE Energy has leases with non-index based escalation clauses for fixed dollar or percentage increases. DTE Electric has leases with non-index based escalation clauses for fixed dollar increases. DTE Energy also has leases with variable payments based upon usage of, or revenues associated with, the leased assets. DTE Electric also has leases with variable payments based upon the usage of the leased assets.
Certain leases of easements and coal railcars contain provisions whereby the Registrants have the option to terminate the lease agreement by giving notice of such termination during the time frames specified in the respective lease. The Registrants have considered such provisions in the determination of the lease term when it is reasonably certain that the lease would be terminated.
The Registrants have certain leases which contain purchase options. Based upon the nature of the leased property and terms of the purchase options, the Registrants have determined it is not reasonably certain that such purchase options will be utilized. Thus, the impact of the purchase options has not been included in the determination of right-of-use assets and lease liabilities for the subject leases.
The Registrants have certain leases which contain renewal options. Where the renewal options were deemed reasonably certain to occur, the impacts of such options were included in the determination of the right of use assets and lease liabilities.
The Registrants have agreements with lease and non-lease components, which are generally accounted for separately. Consideration in a lease is allocated between lease and non-lease components based upon the estimated relative standalone prices. The Registrants have certain coal railcar leases for which non-lease and lease components are accounted for as a single lease component, as permitted under Topic 842.
The following is a summary of the components of lease cost for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Operating lease cost$19 $21 $23 $14 $14 $17 
Finance lease cost:
Amortization of right-of-use assets7 5 4 6 4 4 
Interest of lease liabilities1 — — — — — 
Total finance lease cost8 5 4 6 4 4 
Variable lease cost9 10 10 — — — 
Short-term lease cost14 11 9 6 6 3 
$50 $47 $46 $26 $24 $24 
The Registrants have elected not to apply the recognition requirements of Topic 842 to leases with a term of 12 months or less. DTE Energy and DTE Electric record operating, variable, and short-term lease costs as Operating Expenses on the Consolidated Statements of Operations, except for certain amounts that may be capitalized to other assets.
The following is a summary of other information related to leases for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases$8 $3 $5 $7 $2 $5 
Operating cash flows for operating leases$19 $22 $22 $14 $14 $16 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$5 $2 $42 $1 $— $27 
Finance leases$3 $19 $8 $1 $14 $— 
Weighted Average Remaining Lease Term (Years)
Operating leases12.712.112.110.310.410.6
Finance leases7.87.69.12.13.12.0
Weighted Average Discount Rate
Operating leases3.6 %3.6 %3.5 %3.4 %3.3 %3.3 %
Finance leases2.2 %2.0 %3.1 %1.0 %1.0 %3.1 %
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Finance leases reported on the Consolidated Statements of Financial Position are as follows for the years ended December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Right-of-use assets, within Property, plant, and equipment, net$26 $29 $12 $16 
Current lease liabilities, within Current portion of long-term debt$8 $7 $6 $6 
Long-term lease liabilities$19 $24 $7 $13 
Lessor
During the first quarter 2021, 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 an additional net investment of $31 million. DTE Energy also leases a portion of its pipeline system through a finance lease contract that has been renewed through 2025, with additional renewal options reasonably certain to be exercised through 2040.
DTE Energy also leases various assets under operating leases for a pipeline, energy facilities and related equipment. Such leases are comprised of both fixed payments and variable payments which are contingent on volumes, with terms ranging from 2 to 24 years. Generally, the operating leases do not have renewal provisions or options to purchase the assets at the end of the lease. The operating leases generally do not have termination for convenience provisions. Termination may be allowed under specific circumstances stated in the lease contract, such as under an event of default.
Certain of the finance and operating leases have lease terms that extend to the end of the estimated economic life of the leased assets, thereby resulting in no residual value. Any remaining residual values under the finance and operating leases are expected to be recovered through rates, renewals or new lease contracts. Residual values have been determined using the estimated economic life of the leased assets. The finance and operating leases do not contain residual value guarantees.
Certain of the operating leases have both lease and non-lease components. The lease and non-lease components are allocated based upon estimated relative standalone selling prices.
A lease is deemed to exist when the Registrants have provided other parties with the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration received. The right to control is deemed to occur when the Registrants have provided other parties with the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows:
202120202019
(In millions)
Fixed payments$67 $57 $56 
Variable payments131 124 128 
$198 $181 $184 
Operating revenues$103 $99 $121 
Other income95 82 63 
$198 $181 $184 
DTE Energy’s minimum future rental revenues under operating leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$15 
202315 
202415 
202515 
202611 
2027 and thereafter51 
$122 
Depreciation expense associated with DTE Energy's property under operating leases was $22 million, $24 million, and $23 million for the years ended December 31, 2021, 2020, and 2019 respectively.
The following is a summary of property under operating leases for DTE Energy as of December 31:
20212020
(In millions)
Gross property under operating leases$341 $389 
Accumulated amortization of property under operating leases$181 $191 
The components of DTE Energy’s net investment in finance leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$23 
202322 
202422 
202521 
202621 
2027 and thereafter271 
Total minimum future lease receipts380 
Residual value of leased pipeline17 
Less unearned income198 
Net investment in finance lease199 
Less current portion6 
$193 
Interest income recognized under finance leases was $17 million, $16 million, and $5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During 2020, DTE Energy also recognized $11 million of profit from the sale of membership interests in the REF business accounted for as a finance lease arrangement.
Leases LEASES
Lessee
Leases at DTE Energy are primarily comprised of various forms of equipment, computer hardware, coal railcars, production facilities, buildings, and certain easement leases with terms ranging from approximately 2 to 40 years. Leases at DTE Electric are primarily comprised of various forms of equipment, computer hardware, coal railcars, and certain easement leases with terms ranging from approximately 2 to 40 years.
A lease is deemed to exist when the Registrants have the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration paid. The right to control is deemed to occur when the Registrants have the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Lease liabilities are determined utilizing a discount rate to determine the present values of lease payments. Topic 842 requires the use of the rate implicit in the lease when it is readily determinable. When the rate implicit in the lease is not readily determinable, the incremental borrowing rate is used. The Registrants have determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. The incremental borrowing rates for DTE Electric and DTE Gas have been determined utilizing respective secured borrowing rates for first mortgage bonds with like tenors of remaining lease terms. Incremental borrowing rates for non-utility entities have been determined utilizing an implied secured borrowing rate based upon an unsecured rate for a similar tenor of remaining lease terms, which is then adjusted for the estimated impact of collateral.
Certain leases of the Registrants contain escalation clauses whereby the payments are adjusted for consumer price or labor indices. DTE Energy has leases with non-index based escalation clauses for fixed dollar or percentage increases. DTE Electric has leases with non-index based escalation clauses for fixed dollar increases. DTE Energy also has leases with variable payments based upon usage of, or revenues associated with, the leased assets. DTE Electric also has leases with variable payments based upon the usage of the leased assets.
Certain leases of easements and coal railcars contain provisions whereby the Registrants have the option to terminate the lease agreement by giving notice of such termination during the time frames specified in the respective lease. The Registrants have considered such provisions in the determination of the lease term when it is reasonably certain that the lease would be terminated.
The Registrants have certain leases which contain purchase options. Based upon the nature of the leased property and terms of the purchase options, the Registrants have determined it is not reasonably certain that such purchase options will be utilized. Thus, the impact of the purchase options has not been included in the determination of right-of-use assets and lease liabilities for the subject leases.
The Registrants have certain leases which contain renewal options. Where the renewal options were deemed reasonably certain to occur, the impacts of such options were included in the determination of the right of use assets and lease liabilities.
The Registrants have agreements with lease and non-lease components, which are generally accounted for separately. Consideration in a lease is allocated between lease and non-lease components based upon the estimated relative standalone prices. The Registrants have certain coal railcar leases for which non-lease and lease components are accounted for as a single lease component, as permitted under Topic 842.
The following is a summary of the components of lease cost for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Operating lease cost$19 $21 $23 $14 $14 $17 
Finance lease cost:
Amortization of right-of-use assets7 5 4 6 4 4 
Interest of lease liabilities1 — — — — — 
Total finance lease cost8 5 4 6 4 4 
Variable lease cost9 10 10 — — — 
Short-term lease cost14 11 9 6 6 3 
$50 $47 $46 $26 $24 $24 
The Registrants have elected not to apply the recognition requirements of Topic 842 to leases with a term of 12 months or less. DTE Energy and DTE Electric record operating, variable, and short-term lease costs as Operating Expenses on the Consolidated Statements of Operations, except for certain amounts that may be capitalized to other assets.
The following is a summary of other information related to leases for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases$8 $3 $5 $7 $2 $5 
Operating cash flows for operating leases$19 $22 $22 $14 $14 $16 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$5 $2 $42 $1 $— $27 
Finance leases$3 $19 $8 $1 $14 $— 
Weighted Average Remaining Lease Term (Years)
Operating leases12.712.112.110.310.410.6
Finance leases7.87.69.12.13.12.0
Weighted Average Discount Rate
Operating leases3.6 %3.6 %3.5 %3.4 %3.3 %3.3 %
Finance leases2.2 %2.0 %3.1 %1.0 %1.0 %3.1 %
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Finance leases reported on the Consolidated Statements of Financial Position are as follows for the years ended December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Right-of-use assets, within Property, plant, and equipment, net$26 $29 $12 $16 
Current lease liabilities, within Current portion of long-term debt$8 $7 $6 $6 
Long-term lease liabilities$19 $24 $7 $13 
Lessor
During the first quarter 2021, 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 an additional net investment of $31 million. DTE Energy also leases a portion of its pipeline system through a finance lease contract that has been renewed through 2025, with additional renewal options reasonably certain to be exercised through 2040.
DTE Energy also leases various assets under operating leases for a pipeline, energy facilities and related equipment. Such leases are comprised of both fixed payments and variable payments which are contingent on volumes, with terms ranging from 2 to 24 years. Generally, the operating leases do not have renewal provisions or options to purchase the assets at the end of the lease. The operating leases generally do not have termination for convenience provisions. Termination may be allowed under specific circumstances stated in the lease contract, such as under an event of default.
Certain of the finance and operating leases have lease terms that extend to the end of the estimated economic life of the leased assets, thereby resulting in no residual value. Any remaining residual values under the finance and operating leases are expected to be recovered through rates, renewals or new lease contracts. Residual values have been determined using the estimated economic life of the leased assets. The finance and operating leases do not contain residual value guarantees.
Certain of the operating leases have both lease and non-lease components. The lease and non-lease components are allocated based upon estimated relative standalone selling prices.
A lease is deemed to exist when the Registrants have provided other parties with the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration received. The right to control is deemed to occur when the Registrants have provided other parties with the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows:
202120202019
(In millions)
Fixed payments$67 $57 $56 
Variable payments131 124 128 
$198 $181 $184 
Operating revenues$103 $99 $121 
Other income95 82 63 
$198 $181 $184 
DTE Energy’s minimum future rental revenues under operating leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$15 
202315 
202415 
202515 
202611 
2027 and thereafter51 
$122 
Depreciation expense associated with DTE Energy's property under operating leases was $22 million, $24 million, and $23 million for the years ended December 31, 2021, 2020, and 2019 respectively.
The following is a summary of property under operating leases for DTE Energy as of December 31:
20212020
(In millions)
Gross property under operating leases$341 $389 
Accumulated amortization of property under operating leases$181 $191 
The components of DTE Energy’s net investment in finance leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$23 
202322 
202422 
202521 
202621 
2027 and thereafter271 
Total minimum future lease receipts380 
Residual value of leased pipeline17 
Less unearned income198 
Net investment in finance lease199 
Less current portion6 
$193 
Interest income recognized under finance leases was $17 million, $16 million, and $5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During 2020, DTE Energy also recognized $11 million of profit from the sale of membership interests in the REF business accounted for as a finance lease arrangement.
Leases LEASES
Lessee
Leases at DTE Energy are primarily comprised of various forms of equipment, computer hardware, coal railcars, production facilities, buildings, and certain easement leases with terms ranging from approximately 2 to 40 years. Leases at DTE Electric are primarily comprised of various forms of equipment, computer hardware, coal railcars, and certain easement leases with terms ranging from approximately 2 to 40 years.
A lease is deemed to exist when the Registrants have the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration paid. The right to control is deemed to occur when the Registrants have the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Lease liabilities are determined utilizing a discount rate to determine the present values of lease payments. Topic 842 requires the use of the rate implicit in the lease when it is readily determinable. When the rate implicit in the lease is not readily determinable, the incremental borrowing rate is used. The Registrants have determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. The incremental borrowing rates for DTE Electric and DTE Gas have been determined utilizing respective secured borrowing rates for first mortgage bonds with like tenors of remaining lease terms. Incremental borrowing rates for non-utility entities have been determined utilizing an implied secured borrowing rate based upon an unsecured rate for a similar tenor of remaining lease terms, which is then adjusted for the estimated impact of collateral.
Certain leases of the Registrants contain escalation clauses whereby the payments are adjusted for consumer price or labor indices. DTE Energy has leases with non-index based escalation clauses for fixed dollar or percentage increases. DTE Electric has leases with non-index based escalation clauses for fixed dollar increases. DTE Energy also has leases with variable payments based upon usage of, or revenues associated with, the leased assets. DTE Electric also has leases with variable payments based upon the usage of the leased assets.
Certain leases of easements and coal railcars contain provisions whereby the Registrants have the option to terminate the lease agreement by giving notice of such termination during the time frames specified in the respective lease. The Registrants have considered such provisions in the determination of the lease term when it is reasonably certain that the lease would be terminated.
The Registrants have certain leases which contain purchase options. Based upon the nature of the leased property and terms of the purchase options, the Registrants have determined it is not reasonably certain that such purchase options will be utilized. Thus, the impact of the purchase options has not been included in the determination of right-of-use assets and lease liabilities for the subject leases.
The Registrants have certain leases which contain renewal options. Where the renewal options were deemed reasonably certain to occur, the impacts of such options were included in the determination of the right of use assets and lease liabilities.
The Registrants have agreements with lease and non-lease components, which are generally accounted for separately. Consideration in a lease is allocated between lease and non-lease components based upon the estimated relative standalone prices. The Registrants have certain coal railcar leases for which non-lease and lease components are accounted for as a single lease component, as permitted under Topic 842.
The following is a summary of the components of lease cost for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Operating lease cost$19 $21 $23 $14 $14 $17 
Finance lease cost:
Amortization of right-of-use assets7 5 4 6 4 4 
Interest of lease liabilities1 — — — — — 
Total finance lease cost8 5 4 6 4 4 
Variable lease cost9 10 10 — — — 
Short-term lease cost14 11 9 6 6 3 
$50 $47 $46 $26 $24 $24 
The Registrants have elected not to apply the recognition requirements of Topic 842 to leases with a term of 12 months or less. DTE Energy and DTE Electric record operating, variable, and short-term lease costs as Operating Expenses on the Consolidated Statements of Operations, except for certain amounts that may be capitalized to other assets.
The following is a summary of other information related to leases for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases$8 $3 $5 $7 $2 $5 
Operating cash flows for operating leases$19 $22 $22 $14 $14 $16 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$5 $2 $42 $1 $— $27 
Finance leases$3 $19 $8 $1 $14 $— 
Weighted Average Remaining Lease Term (Years)
Operating leases12.712.112.110.310.410.6
Finance leases7.87.69.12.13.12.0
Weighted Average Discount Rate
Operating leases3.6 %3.6 %3.5 %3.4 %3.3 %3.3 %
Finance leases2.2 %2.0 %3.1 %1.0 %1.0 %3.1 %
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Finance leases reported on the Consolidated Statements of Financial Position are as follows for the years ended December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Right-of-use assets, within Property, plant, and equipment, net$26 $29 $12 $16 
Current lease liabilities, within Current portion of long-term debt$8 $7 $6 $6 
Long-term lease liabilities$19 $24 $7 $13 
Lessor
During the first quarter 2021, 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 an additional net investment of $31 million. DTE Energy also leases a portion of its pipeline system through a finance lease contract that has been renewed through 2025, with additional renewal options reasonably certain to be exercised through 2040.
DTE Energy also leases various assets under operating leases for a pipeline, energy facilities and related equipment. Such leases are comprised of both fixed payments and variable payments which are contingent on volumes, with terms ranging from 2 to 24 years. Generally, the operating leases do not have renewal provisions or options to purchase the assets at the end of the lease. The operating leases generally do not have termination for convenience provisions. Termination may be allowed under specific circumstances stated in the lease contract, such as under an event of default.
Certain of the finance and operating leases have lease terms that extend to the end of the estimated economic life of the leased assets, thereby resulting in no residual value. Any remaining residual values under the finance and operating leases are expected to be recovered through rates, renewals or new lease contracts. Residual values have been determined using the estimated economic life of the leased assets. The finance and operating leases do not contain residual value guarantees.
Certain of the operating leases have both lease and non-lease components. The lease and non-lease components are allocated based upon estimated relative standalone selling prices.
A lease is deemed to exist when the Registrants have provided other parties with the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration received. The right to control is deemed to occur when the Registrants have provided other parties with the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows:
202120202019
(In millions)
Fixed payments$67 $57 $56 
Variable payments131 124 128 
$198 $181 $184 
Operating revenues$103 $99 $121 
Other income95 82 63 
$198 $181 $184 
DTE Energy’s minimum future rental revenues under operating leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$15 
202315 
202415 
202515 
202611 
2027 and thereafter51 
$122 
Depreciation expense associated with DTE Energy's property under operating leases was $22 million, $24 million, and $23 million for the years ended December 31, 2021, 2020, and 2019 respectively.
The following is a summary of property under operating leases for DTE Energy as of December 31:
20212020
(In millions)
Gross property under operating leases$341 $389 
Accumulated amortization of property under operating leases$181 $191 
The components of DTE Energy’s net investment in finance leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$23 
202322 
202422 
202521 
202621 
2027 and thereafter271 
Total minimum future lease receipts380 
Residual value of leased pipeline17 
Less unearned income198 
Net investment in finance lease199 
Less current portion6 
$193 
Interest income recognized under finance leases was $17 million, $16 million, and $5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During 2020, DTE Energy also recognized $11 million of profit from the sale of membership interests in the REF business accounted for as a finance lease arrangement.
Leases LEASES
Lessee
Leases at DTE Energy are primarily comprised of various forms of equipment, computer hardware, coal railcars, production facilities, buildings, and certain easement leases with terms ranging from approximately 2 to 40 years. Leases at DTE Electric are primarily comprised of various forms of equipment, computer hardware, coal railcars, and certain easement leases with terms ranging from approximately 2 to 40 years.
A lease is deemed to exist when the Registrants have the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration paid. The right to control is deemed to occur when the Registrants have the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Lease liabilities are determined utilizing a discount rate to determine the present values of lease payments. Topic 842 requires the use of the rate implicit in the lease when it is readily determinable. When the rate implicit in the lease is not readily determinable, the incremental borrowing rate is used. The Registrants have determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. The incremental borrowing rates for DTE Electric and DTE Gas have been determined utilizing respective secured borrowing rates for first mortgage bonds with like tenors of remaining lease terms. Incremental borrowing rates for non-utility entities have been determined utilizing an implied secured borrowing rate based upon an unsecured rate for a similar tenor of remaining lease terms, which is then adjusted for the estimated impact of collateral.
Certain leases of the Registrants contain escalation clauses whereby the payments are adjusted for consumer price or labor indices. DTE Energy has leases with non-index based escalation clauses for fixed dollar or percentage increases. DTE Electric has leases with non-index based escalation clauses for fixed dollar increases. DTE Energy also has leases with variable payments based upon usage of, or revenues associated with, the leased assets. DTE Electric also has leases with variable payments based upon the usage of the leased assets.
Certain leases of easements and coal railcars contain provisions whereby the Registrants have the option to terminate the lease agreement by giving notice of such termination during the time frames specified in the respective lease. The Registrants have considered such provisions in the determination of the lease term when it is reasonably certain that the lease would be terminated.
The Registrants have certain leases which contain purchase options. Based upon the nature of the leased property and terms of the purchase options, the Registrants have determined it is not reasonably certain that such purchase options will be utilized. Thus, the impact of the purchase options has not been included in the determination of right-of-use assets and lease liabilities for the subject leases.
The Registrants have certain leases which contain renewal options. Where the renewal options were deemed reasonably certain to occur, the impacts of such options were included in the determination of the right of use assets and lease liabilities.
The Registrants have agreements with lease and non-lease components, which are generally accounted for separately. Consideration in a lease is allocated between lease and non-lease components based upon the estimated relative standalone prices. The Registrants have certain coal railcar leases for which non-lease and lease components are accounted for as a single lease component, as permitted under Topic 842.
The following is a summary of the components of lease cost for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Operating lease cost$19 $21 $23 $14 $14 $17 
Finance lease cost:
Amortization of right-of-use assets7 5 4 6 4 4 
Interest of lease liabilities1 — — — — — 
Total finance lease cost8 5 4 6 4 4 
Variable lease cost9 10 10 — — — 
Short-term lease cost14 11 9 6 6 3 
$50 $47 $46 $26 $24 $24 
The Registrants have elected not to apply the recognition requirements of Topic 842 to leases with a term of 12 months or less. DTE Energy and DTE Electric record operating, variable, and short-term lease costs as Operating Expenses on the Consolidated Statements of Operations, except for certain amounts that may be capitalized to other assets.
The following is a summary of other information related to leases for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases$8 $3 $5 $7 $2 $5 
Operating cash flows for operating leases$19 $22 $22 $14 $14 $16 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$5 $2 $42 $1 $— $27 
Finance leases$3 $19 $8 $1 $14 $— 
Weighted Average Remaining Lease Term (Years)
Operating leases12.712.112.110.310.410.6
Finance leases7.87.69.12.13.12.0
Weighted Average Discount Rate
Operating leases3.6 %3.6 %3.5 %3.4 %3.3 %3.3 %
Finance leases2.2 %2.0 %3.1 %1.0 %1.0 %3.1 %
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Finance leases reported on the Consolidated Statements of Financial Position are as follows for the years ended December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Right-of-use assets, within Property, plant, and equipment, net$26 $29 $12 $16 
Current lease liabilities, within Current portion of long-term debt$8 $7 $6 $6 
Long-term lease liabilities$19 $24 $7 $13 
Lessor
During the first quarter 2021, 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 an additional net investment of $31 million. DTE Energy also leases a portion of its pipeline system through a finance lease contract that has been renewed through 2025, with additional renewal options reasonably certain to be exercised through 2040.
DTE Energy also leases various assets under operating leases for a pipeline, energy facilities and related equipment. Such leases are comprised of both fixed payments and variable payments which are contingent on volumes, with terms ranging from 2 to 24 years. Generally, the operating leases do not have renewal provisions or options to purchase the assets at the end of the lease. The operating leases generally do not have termination for convenience provisions. Termination may be allowed under specific circumstances stated in the lease contract, such as under an event of default.
Certain of the finance and operating leases have lease terms that extend to the end of the estimated economic life of the leased assets, thereby resulting in no residual value. Any remaining residual values under the finance and operating leases are expected to be recovered through rates, renewals or new lease contracts. Residual values have been determined using the estimated economic life of the leased assets. The finance and operating leases do not contain residual value guarantees.
Certain of the operating leases have both lease and non-lease components. The lease and non-lease components are allocated based upon estimated relative standalone selling prices.
A lease is deemed to exist when the Registrants have provided other parties with the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration received. The right to control is deemed to occur when the Registrants have provided other parties with the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows:
202120202019
(In millions)
Fixed payments$67 $57 $56 
Variable payments131 124 128 
$198 $181 $184 
Operating revenues$103 $99 $121 
Other income95 82 63 
$198 $181 $184 
DTE Energy’s minimum future rental revenues under operating leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$15 
202315 
202415 
202515 
202611 
2027 and thereafter51 
$122 
Depreciation expense associated with DTE Energy's property under operating leases was $22 million, $24 million, and $23 million for the years ended December 31, 2021, 2020, and 2019 respectively.
The following is a summary of property under operating leases for DTE Energy as of December 31:
20212020
(In millions)
Gross property under operating leases$341 $389 
Accumulated amortization of property under operating leases$181 $191 
The components of DTE Energy’s net investment in finance leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$23 
202322 
202422 
202521 
202621 
2027 and thereafter271 
Total minimum future lease receipts380 
Residual value of leased pipeline17 
Less unearned income198 
Net investment in finance lease199 
Less current portion6 
$193 
Interest income recognized under finance leases was $17 million, $16 million, and $5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During 2020, DTE Energy also recognized $11 million of profit from the sale of membership interests in the REF business accounted for as a finance lease arrangement.
Leases LEASES
Lessee
Leases at DTE Energy are primarily comprised of various forms of equipment, computer hardware, coal railcars, production facilities, buildings, and certain easement leases with terms ranging from approximately 2 to 40 years. Leases at DTE Electric are primarily comprised of various forms of equipment, computer hardware, coal railcars, and certain easement leases with terms ranging from approximately 2 to 40 years.
A lease is deemed to exist when the Registrants have the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration paid. The right to control is deemed to occur when the Registrants have the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Lease liabilities are determined utilizing a discount rate to determine the present values of lease payments. Topic 842 requires the use of the rate implicit in the lease when it is readily determinable. When the rate implicit in the lease is not readily determinable, the incremental borrowing rate is used. The Registrants have determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. The incremental borrowing rates for DTE Electric and DTE Gas have been determined utilizing respective secured borrowing rates for first mortgage bonds with like tenors of remaining lease terms. Incremental borrowing rates for non-utility entities have been determined utilizing an implied secured borrowing rate based upon an unsecured rate for a similar tenor of remaining lease terms, which is then adjusted for the estimated impact of collateral.
Certain leases of the Registrants contain escalation clauses whereby the payments are adjusted for consumer price or labor indices. DTE Energy has leases with non-index based escalation clauses for fixed dollar or percentage increases. DTE Electric has leases with non-index based escalation clauses for fixed dollar increases. DTE Energy also has leases with variable payments based upon usage of, or revenues associated with, the leased assets. DTE Electric also has leases with variable payments based upon the usage of the leased assets.
Certain leases of easements and coal railcars contain provisions whereby the Registrants have the option to terminate the lease agreement by giving notice of such termination during the time frames specified in the respective lease. The Registrants have considered such provisions in the determination of the lease term when it is reasonably certain that the lease would be terminated.
The Registrants have certain leases which contain purchase options. Based upon the nature of the leased property and terms of the purchase options, the Registrants have determined it is not reasonably certain that such purchase options will be utilized. Thus, the impact of the purchase options has not been included in the determination of right-of-use assets and lease liabilities for the subject leases.
The Registrants have certain leases which contain renewal options. Where the renewal options were deemed reasonably certain to occur, the impacts of such options were included in the determination of the right of use assets and lease liabilities.
The Registrants have agreements with lease and non-lease components, which are generally accounted for separately. Consideration in a lease is allocated between lease and non-lease components based upon the estimated relative standalone prices. The Registrants have certain coal railcar leases for which non-lease and lease components are accounted for as a single lease component, as permitted under Topic 842.
The following is a summary of the components of lease cost for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Operating lease cost$19 $21 $23 $14 $14 $17 
Finance lease cost:
Amortization of right-of-use assets7 5 4 6 4 4 
Interest of lease liabilities1 — — — — — 
Total finance lease cost8 5 4 6 4 4 
Variable lease cost9 10 10 — — — 
Short-term lease cost14 11 9 6 6 3 
$50 $47 $46 $26 $24 $24 
The Registrants have elected not to apply the recognition requirements of Topic 842 to leases with a term of 12 months or less. DTE Energy and DTE Electric record operating, variable, and short-term lease costs as Operating Expenses on the Consolidated Statements of Operations, except for certain amounts that may be capitalized to other assets.
The following is a summary of other information related to leases for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases$8 $3 $5 $7 $2 $5 
Operating cash flows for operating leases$19 $22 $22 $14 $14 $16 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$5 $2 $42 $1 $— $27 
Finance leases$3 $19 $8 $1 $14 $— 
Weighted Average Remaining Lease Term (Years)
Operating leases12.712.112.110.310.410.6
Finance leases7.87.69.12.13.12.0
Weighted Average Discount Rate
Operating leases3.6 %3.6 %3.5 %3.4 %3.3 %3.3 %
Finance leases2.2 %2.0 %3.1 %1.0 %1.0 %3.1 %
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Finance leases reported on the Consolidated Statements of Financial Position are as follows for the years ended December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Right-of-use assets, within Property, plant, and equipment, net$26 $29 $12 $16 
Current lease liabilities, within Current portion of long-term debt$8 $7 $6 $6 
Long-term lease liabilities$19 $24 $7 $13 
Lessor
During the first quarter 2021, 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 an additional net investment of $31 million. DTE Energy also leases a portion of its pipeline system through a finance lease contract that has been renewed through 2025, with additional renewal options reasonably certain to be exercised through 2040.
DTE Energy also leases various assets under operating leases for a pipeline, energy facilities and related equipment. Such leases are comprised of both fixed payments and variable payments which are contingent on volumes, with terms ranging from 2 to 24 years. Generally, the operating leases do not have renewal provisions or options to purchase the assets at the end of the lease. The operating leases generally do not have termination for convenience provisions. Termination may be allowed under specific circumstances stated in the lease contract, such as under an event of default.
Certain of the finance and operating leases have lease terms that extend to the end of the estimated economic life of the leased assets, thereby resulting in no residual value. Any remaining residual values under the finance and operating leases are expected to be recovered through rates, renewals or new lease contracts. Residual values have been determined using the estimated economic life of the leased assets. The finance and operating leases do not contain residual value guarantees.
Certain of the operating leases have both lease and non-lease components. The lease and non-lease components are allocated based upon estimated relative standalone selling prices.
A lease is deemed to exist when the Registrants have provided other parties with the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration received. The right to control is deemed to occur when the Registrants have provided other parties with the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows:
202120202019
(In millions)
Fixed payments$67 $57 $56 
Variable payments131 124 128 
$198 $181 $184 
Operating revenues$103 $99 $121 
Other income95 82 63 
$198 $181 $184 
DTE Energy’s minimum future rental revenues under operating leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$15 
202315 
202415 
202515 
202611 
2027 and thereafter51 
$122 
Depreciation expense associated with DTE Energy's property under operating leases was $22 million, $24 million, and $23 million for the years ended December 31, 2021, 2020, and 2019 respectively.
The following is a summary of property under operating leases for DTE Energy as of December 31:
20212020
(In millions)
Gross property under operating leases$341 $389 
Accumulated amortization of property under operating leases$181 $191 
The components of DTE Energy’s net investment in finance leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$23 
202322 
202422 
202521 
202621 
2027 and thereafter271 
Total minimum future lease receipts380 
Residual value of leased pipeline17 
Less unearned income198 
Net investment in finance lease199 
Less current portion6 
$193 
Interest income recognized under finance leases was $17 million, $16 million, and $5 million for the years ended December 31, 2021, 2020, and 2019, respectively. During 2020, DTE Energy also recognized $11 million of profit from the sale of membership interests in the REF business accounted for as a finance lease arrangement.
v3.22.0.1
Commitments and Contingencies
 12 Months Ended
Dec. 31, 2021
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 planning to submit a request for redesignation of the southeast Michigan ozone non-attainment area to the EPA. However, the State is required to develop and implement a plan to address the non-attainment area. The plan will likely be submitted to the EPA by mid-2022 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.
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 was vacated and remanded back to the EPA in a D.C. Circuit Court decision on January 19, 2021. Petitions were filed asking the Supreme Court to review the D.C. Circuit's decision vacating the ACE rule, and the petition was granted in October 2021. A decision from the Supreme Court is expected by June 2022. The next steps taken by the EPA with respect to regulation of GHGs from EGUs is uncertain. Regardless of future rules, DTE Energy remains committed for its electric utility operations to reduce carbon emissions 32% by 2023, 50% by 2028, and 80% by 2040 from 2005 carbon emissions levels, and its goal of net zero emissions from 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 rule was finalized on January 13, 2021 and immediately challenged. An order vacating the rule was filed by the D.C. Circuit Court of Appeals on April 5, 2021. 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, 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 rule making 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 December 31, 2021 and 2020, DTE Electric had $14 million and $10 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, September 2020, and November 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.
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 established 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 November 12, 2020, an additional revision to the CCR Rule "A Holistic Approach to Closure Part B: Alternate Demonstration for Unlined Surface Impoundments" 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 has submitted applications to the EPA that support continued use of all impoundments through their active lives. The applications are currently under review and the forced closure date of April 11, 2021 is effectively delayed while the EPA completes their review.
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 statutory revision 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. The EPA is currently working with EGLE in reviewing the submitted State program, and DTE Electric will work with EGLE to implement a State program that may be approved in the future.
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 2015 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 October 13, 2020, the EPA finalized the ELG Reconsideration Rule which revised the regulations from the 2015 ELG rule. The Reconsideration Rule re-establishes the technology-based effluent limitations guidelines and standards applicable to FGD wastewater and bottom ash transport water. The EPA set the applicability dates for bottom ash transport water "as soon as possible" beginning October 13, 2021 and no later than December 31, 2025. FGD wastewater retrofits must be completed "as soon as possible" beginning October 13, 2021 and no later than December 31, 2025 or December 31, 2028 if a permittee decides to pursue the Voluntary Incentives Program (VIP) subcategory for FGD wastewater. If a facility applies for the VIP, they must meet more stringent standards, but are allowed an extended time period to complete the project.
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.
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 an NPDES permit for the Belle River power plant establishing compliance deadlines based on the 2020 Reconsideration Rule. On October 11, 2021, in consideration of the deadlines above, DTE Electric submitted the appropriate documentation titled the Notice of Planned Participation (NOPP) to the State of Michigan that formally announced the intent to pursue compliance subcategories as ELG compliance options: the cessation of coal at the Belle River power plant no later than 2028 and the VIP for FGD wastewater at Monroe power plant.
On July 27, 2021, the EPA announced they will revisit some of the compliance requirements that were established in the 2020 Reconsideration Rule and plan to release a new proposed rule in Fall of 2022. The 2020 Reconsideration Rule remains in effect until that time.
DTE Electric continues to evaluate compliance strategies, technologies, and system designs for both FGD wastewater and bottom ash transport water system to achieve compliance with the EPA rules at the Monroe power plant.
DTE Electric has estimated the impact of the CCR and ELG rules to be $522 million of capital expenditures, including $417 million for 2022 through 2026.
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 and within its gas utility. DTE Energy is working to source gas with lower methane intensity, reduce emissions through its gas main renewal and pipeline integrity programs, and if necessary, use carbon offsets to achieve net zero. DTE Gas also committed to helping its customers reduce their emissions from natural gas by 35% by 2050. To support this goal, DTE Gas launched its CleanVision Natural Gas Balance program in January 2021 that offers customers a way to reduce their carbon footprint using carbon offsets and renewable natural gas. The carbon offset program is focused on protecting Michigan forests that naturally absorb carbon dioxide.
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 December 31, 2021 and 2020, DTE Gas had $24 million 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 an FOV 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. In September 2020, the EPA issued another FOV alleging EES Coke's 2018 and 2019 SO2 emissions exceeded projections and hence violated non-attainment new source review requirements. EES Coke evaluated the EPA's alleged violations and believes that the permits approved by EGLE complied with the Clean Air Act. EES Coke also responded to the EPA's September 2020 allegations demonstrating its actual emissions are compliant with non-attainment new source review requirements. 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 Michigan's 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. The Michigan SIP was completed and submitted to the EPA on May 31, 2016 and supplemented on June 30, 2016. On March 19, 2021, the EPA published in the Federal Register partial approval and partial disapproval of Michigan's Detroit SO2 non-attainment area plan. The partial disapproval does not appear to impact DTE's sources and further discussions are underway with the EPA to finalize the plan. Since several non-DTE Energy sources are also part of the proposed compliance plan, DTE Energy is unable to determine the full impact of any further emissions reductions that may be required from DTE's facilities at this time.
Michigan's Phase 2 non-attainment area includes DTE Electric facilities in St. Clair County. The EPA recently approved a clean data determination request submitted by EGLE. This does not automatically redesignate the area to attainment. Until the area is officially redesignated as attainment, DTE Energy is unable to determine the impacts.
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 December 31, 2021 was approximately $70 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 December 31, 2021 was $720 million. 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. The Registrants may also provide indirect guarantees for the indebtedness of others. DTE Energy’s guarantees are not individually material with maximum potential payments totaling $40 million at December 31, 2021. 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 December 31, 2021, DTE Energy had $168 million of performance bonds outstanding, including $119 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.
Labor Contracts
There are several bargaining units for DTE Energy subsidiaries' approximately 5,200 represented employees, including DTE Electric's approximately 2,700 represented employees. This represents 50% and 57% of DTE Energy's and DTE Electric's total employees, respectively. Of these represented employees, approximately 15% and 21% have contracts expiring within one year for DTE Energy and DTE Electric, respectively.
Purchase Commitments
As of December 31, 2021, the Registrants were party to numerous long-term purchase commitments relating to a variety of goods and services required for their businesses. These agreements primarily consist of fuel supply commitments and renewable energy contracts for the Registrants, as well as energy trading contracts for DTE Energy. The Registrants estimate the following commitments from 2022 through 2051 for DTE Energy, and 2022 through 2051 for DTE Electric, as detailed in the following tables:
202220232024202520262027 and ThereafterTotal
DTE Energy(In millions)
Long-term power purchase agreements(a)
$87 $92 $103 $103 $103 $986 $1,474 
Other purchase commitments(b)
3,203 1,704 1,174 482 357 980 7,900 
Total commitments$3,290 $1,796 $1,277 $585 $460 $1,966 $9,374 
202220232024202520262027 and ThereafterTotal
DTE Electric(In millions)
Long-term power purchase agreements(a)
$92 $97 $108 $108 $109 $1,006 $1,520 
Other purchase commitments(b)
365 402 431 197 118 275 1,788 
Total commitments$457 $499 $539 $305 $227 $1,281 $3,308 
_______________________________________
(a)The agreements represent the minimum obligations with suppliers for renewable energy and renewable energy credits under existing contract terms which expire from 2030 through 2035. DTE Electric's share of plant output ranges from 28% to 100%. Purchase commitments for DTE Electric include affiliate agreements with DTE Sustainable Generation that are eliminated in consolidation for DTE Energy.
(b)Excludes amounts associated with full requirements contracts where no stated minimum purchase volume is required.
Utility capital expenditures and expenditures for non-utility businesses will be approximately $3.7 billion and $2.7 billion in 2022 for DTE Energy and DTE Electric, respectively. The Registrants have made certain commitments in connection with the estimated 2022 annual capital expenditures.
COVID-19 Pandemic
DTE Energy has been 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.
In 2021 and 2020, the COVID-19 pandemic has impacted DTE Electric sales volumes. As businesses have transitioned to more remote operations, related sales volumes have been lower for commercial and industrial customers and higher for residential customers as compared to historical volumes before the pandemic. This impact has contributed to a net reduction in DTE Electric sales for these customers, but has been offset by favorable rate mix. Therefore, there has not been a significant impact to the Registrants' Consolidated Financial Statements.
In 2020, COVID-19 also resulted in incremental operating expenses at the electric and gas utilities related to personal protective equipment and other health and safety-related matters, as well as lower volumes for certain companies within the DTE Vantage segment. For the year ended December 31, 2021, however, there has not been any significant impact to operating expenses or DTE Vantage volumes attributable to the COVID-19 pandemic.
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 as of December 31, 2021. 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 9 and 13 to the Consolidated Financial Statements, "Regulatory Matters" and "Financial and Other Derivative Instruments," respectively.
v3.22.0.1
Nuclear Operations
 12 Months Ended
Dec. 31, 2021
Nuclear Operations [Abstract]  
Nuclear Operations NUCLEAR OPERATIONS
Property Insurance
DTE Electric maintains property insurance policies specifically for the Fermi 2 plant. These policies cover such items as replacement power and property damage. NEIL is the primary supplier of the insurance policies.
DTE Electric maintains a policy for extra expenses, including replacement power costs necessitated by Fermi 2’s unavailability due to an insured event. This policy has a 12-week waiting period and provides an aggregate $490 million of coverage over a three-year period.
DTE Electric has $1.5 billion in primary coverage and $1.25 billion of excess coverage for stabilization, decontamination, debris removal, repair and/or replacement of property, and decommissioning. The combined coverage limit for total property damage is $2.75 billion. The total limit for property damage for non-nuclear events is $1.8 billion and an aggregate of $328 million of coverage for extra expenses over a two-year period.
On December 20, 2019, the Terrorism Risk Insurance Program Reauthorization Act of 2019 was signed, extending TRIA through December 31, 2027. For multiple terrorism losses caused by acts of terrorism not covered under the TRIA occurring within one year after the first loss from terrorism, the NEIL policies would make available to all insured entities up to $3.2 billion, plus any amounts recovered from reinsurance, government indemnity, or other sources to cover losses.
Under NEIL policies, DTE Electric could be liable for maximum assessments of up to $57 million per event if the loss associated with any one event at any nuclear plant should exceed the accumulated funds available to NEIL.
Public Liability Insurance
As required by federal law, DTE Electric maintains $450 million of public liability insurance for a nuclear incident. For liabilities arising from a terrorist act outside the scope of TRIA, the policy is subject to one industry aggregate limit of $300 million. Further, under the Price-Anderson Amendments Act of 2005, deferred premium charges up to $138 million could be levied against each licensed nuclear facility, but not more than $20 million per year per facility. Thus, deferred premium charges could be levied against all owners of licensed nuclear facilities in the event of a nuclear incident at any of these facilities.
Nuclear Fuel Disposal Costs
In accordance with the Federal Nuclear Waste Policy Act of 1982, DTE Electric has a contract with the DOE for the future storage and disposal of spent nuclear fuel from Fermi 2 that required DTE Electric to pay the DOE a fee of 1 mill per kWh of Fermi 2 electricity generated and sold. The fee was a component of nuclear fuel expense. The 1 mill per kWh DOE fee was reduced to zero effective May 16, 2014.
The DOE's Yucca Mountain Nuclear Waste Repository program for the acceptance and disposal of spent nuclear fuel was terminated in 2011. DTE Electric is a party in the litigation against the DOE for both past and future costs associated with the DOE's failure to accept spent nuclear fuel under the timetable set forth in the Federal Nuclear Waste Policy Act of 1982. In July 2012, DTE Electric executed a settlement agreement with the federal government for costs associated with the DOE's delay in acceptance of spent nuclear fuel from Fermi 2 for permanent storage. The settlement agreement, including extensions, provides for a claims process and payment of delay-related costs experienced by DTE Electric through 2022. DTE Electric's claims are being settled and paid on a timely basis. The settlement proceeds reduce the cost of the dry cask storage facility assets and provide reimbursement for related operating expenses.
DTE Electric currently employs a spent nuclear fuel storage strategy utilizing a fuel pool and a dry cask storage facility. The spent nuclear fuel storage strategy is expected to provide sufficient spent fuel storage capability for the life of the plant as defined by DTE Electric's operating license agreement.
The federal government continues to maintain its legal obligation to accept spent nuclear fuel from Fermi 2 for permanent storage. Issues relating to long-term waste disposal policy and to the disposition of funds contributed by DTE Electric ratepayers to the federal waste fund await future governmental action.
v3.22.0.1
Retirement Benefits and Trusteed Assets
 12 Months Ended
Dec. 31, 2021
Retirement Benefits [Abstract]  
Retirement Benefits and Trusteed Assets RETIREMENT BENEFITS AND TRUSTEED ASSETS
DTE Energy's subsidiary, DTE Energy Corporate Services, LLC, sponsors defined benefit pension plans and other postretirement plans covering certain employees of the Registrants.
The table below represents the pension and other postretirement benefit plans of each Registrant at December 31, 2021:
Registrants
DTE EnergyDTE Electric
Qualified Pension Plans
DTE Energy Company Retirement PlanXX
DTE Gas Company Retirement Plan for Employees Covered by Collective Bargaining AgreementsX
Shenango Inc. Pension Plan(a)
X
Non-qualified Pension Plans
DTE Energy Company Supplemental Retirement Plan(b)
XX
DTE Energy Company Executive Supplemental Retirement Plan(b)
XX
DTE Energy Company Supplemental Severance Benefit PlanX
Other Postretirement Benefit Plans
The DTE Energy Company Comprehensive Non-Health Welfare PlanXX
The DTE Energy Company Comprehensive Retiree Group Health Care PlanXX
DTE Supplemental Retiree Benefit PlanXX
DTE Energy Company Retiree Reimbursement Arrangement PlanXX
_____________________________________
(a)Sponsored by Shenango, LLC
(b)Sponsored by DTE Energy Company
DTE Electric participates in various plans that provide pension and other postretirement benefits for DTE Energy and its affiliates. The plans are primarily sponsored by the 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.
Pension Plan Benefits
DTE Energy has qualified defined benefit retirement plans for eligible represented and non-represented employees. The plans are noncontributory and provide traditional retirement benefits based on the employee's years of benefit service, average final compensation, and age at retirement. In addition, certain represented and non-represented employees are covered under cash balance provisions that determine benefits on annual employer contributions and interest credits. DTE Energy also maintains supplemental non-qualified, noncontributory, retirement benefit plans for certain management employees. These plans provide for benefits that supplement those provided by DTE Energy’s other retirement plans.
Net pension cost for DTE Energy includes the following components:
202120202019
(In millions)
Service cost$108 $99 $84 
Interest cost158 186 219 
Expected return on plan assets(339)(334)(325)
Amortization of:
Net actuarial loss196 171 131 
Prior service cost— 1 1 
Settlements16 25 2 
Net pension cost$139 $148 $112 
20212020
(In millions)
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial (gain) loss$(376)$137 
Amortization of net actuarial loss(209)(193)
Prior service cost4 — 
Amortization of prior service cost(3)(1)
Total recognized in Regulatory assets and Other comprehensive income (loss)$(584)$(57)
Total recognized in net periodic pension cost, Regulatory assets, and Other comprehensive income (loss)$(445)$91 
The following table reconciles the obligations, assets, and funded status of the plans as well as the amounts recognized as prepaid pension cost or pension liability in DTE Energy's Consolidated Statements of Financial Position at December 31:
DTE Energy
20212020
(In millions)
Accumulated benefit obligation, end of year$5,448 $5,843 
Change in projected benefit obligation
Projected benefit obligation, beginning of year$6,304 $5,810 
Service cost108 99 
Interest cost158 186 
Plan amendments4 — 
Actuarial (gain) loss(255)619 
Special termination benefits— 3 
Benefits paid(414)(353)
Settlements(48)(60)
Projected benefit obligation, end of year$5,857 $6,304 
Change in plan assets
Plan assets at fair value, beginning of year$5,497 $4,993 
Actual return on plan assets460 815 
Company contributions12 102 
Benefits paid(414)(353)
Settlements(48)(60)
Plan assets at fair value, end of year$5,507 $5,497 
Funded status$(350)$(807)
Amount recorded as:
Current liabilities$(11)$(10)
Noncurrent liabilities(339)(797)
$(350)$(807)
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial loss$126 $142 
Prior service cost1 3 
$127 $145 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$1,381 $1,949 
Prior service credit(9)(11)
$1,372 $1,938 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
The decrease in DTE Energy's pension benefit obligation for the year ended December 31, 2021 was primarily due to an actuarial gain driven by an increase in discount rates. The increase in the pension benefit obligation in 2020 was primarily due to an actuarial loss driven by a decrease in discount rates, partially offset by a one-time settlement.
The Registrants' policy is to fund pension costs by contributing amounts consistent with the provisions of the Pension Protection Act of 2006, and additional amounts when it deems appropriate. There were no contributions made to the qualified pension plans in 2021. The following table provides a summary of annual contributions to the qualified plans:
202120202019
(In millions)
DTE Energy$— $92 $150 
DTE Electric$— $60 $100 
At the discretion of management and depending upon financial market conditions, DTE Energy anticipates making up to $7 million in contributions to the qualified pension plans in 2022. In addition, DTE Energy anticipates a transfer of up to $50 million of qualified pension plan funds from DTE Gas to DTE Electric in 2022.
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 $107 million, $106 million, and $93 million for the years ended December 31, 2021, 2020, and 2019, respectively. These amounts include recognized contractual termination benefit charges, curtailment gains, and settlement charges.
At December 31, 2021, the benefits related to DTE Energy's qualified and non-qualified pension plans expected to be paid in each of the next five years and in the aggregate for the five fiscal years thereafter are as follows:
(In millions)
2022$346 
2023360 
2024341 
2025350 
2026346 
2027-20311,723 
Total$3,466 
Assumptions used in determining the projected benefit obligation and net pension costs of DTE Energy are:
202120202019
Projected benefit obligation
Discount rate2.91%2.57%3.28%
Rate of compensation increase3.80%3.80%3.85%
Cash balance interest crediting rate2.40%2.00%3.30%
Net pension costs
Discount rate2.57%3.28%4.40%
Rate of compensation increase3.80%3.85%3.85%
Expected long-term rate of return on plan assets7.00%7.10%7.30%
Cash balance interest crediting rate2.00%3.30%3.70%
DTE Energy employs a formal process in determining the long-term rate of return for various asset classes. Management reviews historic financial market risks and returns and long-term historic relationships between the asset classes of equities, fixed income, and other assets, consistent with the widely accepted capital market principle that asset classes with higher volatility generate a greater return over the long-term. Current market factors such as inflation, interest rates, asset class risks, and asset class returns are evaluated and considered before long-term capital market assumptions are determined. The long-term portfolio return is also established employing a consistent formal process, with due consideration of diversification, active investment management, and rebalancing. Peer data is reviewed to check for reasonableness. As a result of this process, the Registrants have a long-term rate of return assumption for the pension plans of 6.80%. The Registrants believe this rate is a reasonable assumption for the long-term rate of return on plan assets for 2022 given the current investment strategy.
The DTE Energy Company Affiliates Employee Benefit Plans Master Trust employs a liability driven investment program whereby the characteristics of plan liabilities are considered when determining investment policy. Risk tolerance is established through consideration of future plan cash flows, plan funded status, and corporate financial considerations. The investment portfolio contains a diversified blend of equity, fixed income, and other investments. Furthermore, equity investments are diversified across U.S. and non-U.S. stocks and large and small market capitalizations. Fixed income investments generally include U.S. Treasuries, other governmental debt, diversified corporate bonds, bank loans, and mortgage-backed securities. Other investments are used to enhance long-term returns while improving portfolio diversification. Derivatives may be utilized in a risk controlled manner, to potentially increase the portfolio beyond the market value of invested assets and/or reduce portfolio investment risk. Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies, and quarterly investment portfolio reviews.
Target allocations for DTE Energy's pension plan assets as of December 31, 2021 are listed below:
U.S. Large Capitalization (Cap) Equity Securities13 %
U.S. Small Cap and Mid Cap Equity Securities3 
Non-U.S. Equity Securities13 
Fixed Income Securities48 
Hedge Funds and Similar Investments11 
Private Equity and Other12 
100 %
The following tables provide the fair value measurement amounts for DTE Energy's pension plan assets at December 31, 2021 and 2020(a):
December 31, 2021December 31, 2020
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
DTE Energy asset category:(In millions)
Short-term Investments(c)
$112 $— $— $112 $92 $— $— $92 
Equity Securities
Domestic(d)
155 — 758 913 167 — 1,093 1,260 
International(e)
88 — 588 676 100 — 791 891 
Fixed Income Securities
Governmental(f)
943 83 — 1,026 459 95 — 554 
Corporate(g)
— 1,466 — 1,466 — 1,404 — 1,404 
Hedge Funds and Similar Investments(h)
139 63 365 567 238 61 411 710 
Private Equity and Other(i)
— — 747 747 — — 586 586 
DTE Energy Total$1,437 $1,612 $2,458 $5,507 $1,056 $1,560 $2,881 $5,497 
_______________________________________
(a)For a description of levels within the fair value hierarchy, see Note 12 to the Consolidated Financial Statements, "Fair Value."
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category are obtained from quoted prices in actively traded markets.
(d)This category represents portfolios of large, medium and small capitalization domestic equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(f)This category includes U.S. Treasuries, bonds, and other governmental debt. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services.
(g)This category primarily consists of corporate bonds from diversified industries, bank loans, and mortgage backed securities. Pricing for investments in this category is obtained from quotations from broker or pricing services.
(h)This category utilizes a diversified group of strategies that attempt to capture uncorrelated sources of return and includes publicly traded mutual funds, insurance-linked and asset-backed securities, commingled funds and limited partnership funds. Pricing for mutual funds in this category is obtained from quoted prices in actively traded markets. Pricing for insurance-linked and asset-backed securities is obtained from quotations. from broker or pricing services. Commingled funds and limited partnership funds are classified as NAV assets.
(i)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in private real estate and private debt. All investments in this category are classified as NAV assets.
The pension trust holds 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-publicly traded commingled funds hold exchange-traded equity or debt securities and are valued based on stated NAVs. Non-exchange traded fixed income securities are valued by the trustee based upon quotations available from brokers or pricing services. 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 price source of a given security if the trustee challenges an assigned price and determines that another price source is considered preferable. DTE Energy has obtained an understanding of how these prices are derived, including the nature and observability of the inputs used in deriving such prices.
Other Postretirement Benefits
The Registrants participate in defined benefit plans sponsored by the LLC that provide certain other postretirement health care and life insurance benefits for employees who are eligible for these benefits. The Registrants' policy is to fund certain trusts to meet its other postretirement benefit obligations. DTE Energy did not make any contributions to these trusts during 2021 and does not anticipate making any contributions to the trusts in 2022.
DTE Energy and DTE Electric offer a defined contribution VEBA for eligible represented and non-represented employees, in lieu of defined benefit post-employment health care benefits. The Registrants allocate a fixed amount per year to an account in a defined contribution VEBA for each employee. These accounts are managed either by the Registrant (for non-represented and certain represented groups) or by the Utility Workers of America for Local 223 employees. The following table provides contributions to the VEBA in:
202120202019
(In millions)
DTE Energy$18 $15 $13 
DTE Electric$8 $7 $6 
The Registrants also contribute a fixed amount to a Retiree Reimbursement Account for certain non-represented and represented retirees, spouses, and surviving spouses when the youngest of the retiree's covered household becomes eligible for Medicare Part A based on age. The amount of the annual allocation to each participant is determined by the employee's retirement date and increases each year for each eligible participant at the lower of the rate of medical inflation or 2%.
Net other postretirement credit for DTE Energy includes the following components:
202120202019
(In millions)
Service cost$30 $26 $22 
Interest cost46 56 70 
Expected return on plan assets(129)(128)(96)
Amortization of:
Net actuarial loss13 16 12 
Prior service credit(19)(19)(9)
Net other postretirement credit$(59)$(49)$(1)
20212020
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial gain$(113)$(38)
Amortization of net actuarial loss(13)(16)
Prior service cost1 — 
Amortization of prior service credit19 19 
Total recognized in Regulatory assets and Other comprehensive income (loss)$(106)$(35)
Total recognized in net periodic benefit cost, Regulatory assets, and Other comprehensive income (loss)$(165)$(84)
Net other postretirement credit for DTE Electric includes the following components:
202120202019
(In millions)
Service cost$23 $20 $16 
Interest cost35 43 53 
Expected return on plan assets(86)(87)(65)
Amortization of:
Net actuarial loss11 11 5 
Prior service credit(14)(14)(7)
Net other postretirement cost (credit)$(31)$(27)$2 
20212020
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets
Net actuarial gain$(84)$(26)
Amortization of net actuarial loss(11)(11)
Amortization of prior service credit14 14 
Total recognized in Regulatory assets$(81)$(23)
Total recognized in net periodic benefit cost and Regulatory assets$(112)$(50)
The following table reconciles the obligations, assets, and funded status of the plans including amounts recorded as Accrued postretirement liability in the Registrants' Consolidated Statements of Financial Position at December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Change in accumulated postretirement benefit obligation
Accumulated postretirement benefit obligation, beginning of year$1,807 $1,751 $1,369 $1,337 
Service cost30 26 23 20 
Interest cost46 56 35 43 
Plan amendments1 — — — 
Actuarial (gain) loss(100)54 (73)31 
Benefits paid(82)(80)(61)(62)
Accumulated postretirement benefit obligation, end of year$1,702 $1,807 $1,293 $1,369 
Change in plan assets
Plan assets at fair value, beginning of year$1,960 $1,819 $1,320 $1,236 
Actual return on plan assets142 220 96 145 
Benefits paid(81)(79)(61)(61)
Plan assets at fair value, end of year$2,021 $1,960 $1,355 $1,320 
Funded status$319 $153 $62 $(49)
Amount recorded as:
Noncurrent assets$678 $561 $402 $335 
Current liabilities(1)(1)— — 
Noncurrent liabilities(358)(407)(340)(384)
$319 $153 $62 $(49)
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial gain$(1)$(7)$— $— 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$102 $234 $61 $156 
Prior service credit(49)(69)(34)(48)
$53 $165 $27 $108 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
The decrease in the Registrants' other postretirement benefit obligations for the year ended December 31, 2021 was primarily due to an actuarial gain driven by an increase in discount rates. The increase in the other postretirement benefit obligations in 2020 was primarily due to an actuarial loss driven by a decrease in discount rates, partially offset by favorable changes in healthcare cost assumptions.
The following table reflects other postretirement benefit plans with accumulated postretirement benefit obligations in excess of plan assets as of December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Accumulated postretirement benefit obligation$822 $878 $775 $826 
Fair value of plan assets463 470 435 442 
Accumulated postretirement benefit obligation in excess of plan assets$359 $408 $340 $384 
At December 31, 2021, the benefits expected to be paid, including prescription drug benefits, in each of the next five years and in the aggregate for the five fiscal years thereafter for the Registrants are as follows:
DTE EnergyDTE Electric
(In millions)
2022$85 $64 
202389 68 
202491 69 
202594 71 
202695 72 
2027-2031493 375 
Total$947 $719 
Assumptions used in determining the accumulated postretirement benefit obligation and net other postretirement benefit costs of the Registrants are:
202120202019
Accumulated postretirement benefit obligation
Discount rate2.91%2.58%3.29%
Health care trend rate pre- and post- 65
6.75 / 7.25%
6.75 / 7.25%
6.75 / 7.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203420332032
Other postretirement benefit costs
Discount rate2.58%3.29%4.40%
Expected long-term rate of return on plan assets6.70%7.20%7.30%
Health care trend rate pre- and post- 65
6.75 / 7.25%
6.75 / 7.25%
6.75 / 7.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203320322031
The process used in determining the long-term rate of return on assets for the other postretirement benefit plans is similar to that previously described for the pension plans. As a result of this process, the Registrants have a long-term rate of return assumption for the other postretirement benefit plans of 6.40% for 2022. The Registrants believe this rate is a reasonable assumption for the long-term rate of return on plan assets for 2022 given the current investment strategy.
The DTE Energy Company Master VEBA Trust employs a liability driven investment program whereby the characteristics of plan liabilities are considered when determining investment policy. Risk tolerance is established through consideration of future plan cash flows, plan funded status, and corporate financial considerations. The investment portfolio contains a diversified blend of equity, fixed income, and other investments. Furthermore, equity investments are diversified across U.S. and non-U.S. stocks and large and small market capitalizations. Fixed income investments generally include U.S. Treasuries, other governmental debt, diversified corporate bonds, bank loans, and mortgage-backed securities. Other investments are used to enhance long-term returns while improving portfolio diversification. Derivatives may be utilized in a risk controlled manner to potentially increase the portfolio beyond the market value of invested assets and/or reduce portfolio investment risk. Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies, and quarterly investment portfolio reviews.
Target allocations for the Registrants' other postretirement benefit plan assets as of December 31, 2021 are listed below:
U.S. Large Cap Equity Securities10 %
U.S. Small Cap and Mid Cap Equity Securities2 
Non-U.S. Equity Securities10 
Fixed Income Securities54 
Hedge Funds and Similar Investments10 
Private Equity and Other14 
100 %
The following tables provide the fair value measurement amounts for the Registrants' other postretirement benefit plan assets at December 31, 2021 and 2020(a):
December 31, 2021December 31, 2020
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
(In millions)
DTE Energy asset category:
Short-term Investments(c)
$39 $— $— $39 $21 $— $— $21 
Equity Securities
Domestic(d)
27 — 199 226 51 — 200 251 
International(e)
27 — 141 168 23 — 178 201 
Fixed Income Securities
Governmental(f)
343 32 — 375 40 45 — 85 
Corporate(g)
— 355 271 626 — 477 379 856 
Hedge Funds and Similar Investments(h)
58 26 120 204 61 17 124 202 
Private Equity and Other(i)
— — 383 383 — — 344 344 
DTE Energy Total$494 $413 $1,114 $2,021 $196 $539 $1,225 $1,960 
DTE Electric asset category:
Short-term Investments(c)
$26 $— $— $26 $14 $— $— $14 
Equity Securities
Domestic(d)
18 — 132 150 33 — 131 164 
International(e)
18 — 93 111 16 — 117 133 
Fixed Income Securities
Governmental(f)
230 21 — 251 24 31 — 55 
Corporate(g)
— 235 187 422 — 321 263 584 
Hedge Funds and Similar Investments(h)
39 17 81 137 41 11 83 135 
Private Equity and Other(i)
— — 258 258 — — 235 235 
DTE Electric Total$331 $273 $751 $1,355 $128 $363 $829 $1,320 
_______________________________________
(a)For a description of levels within the fair value hierarchy see Note 12 to the Consolidated Financial Statements, "Fair Value."
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category are obtained from quoted prices in actively traded markets.
(d)This category represents portfolios of large, medium and small capitalization domestic equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(f)This category includes U.S. Treasuries, bonds and other governmental debt. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services.
(g)This category primarily consists of corporate bonds from diversified industries, bank loans, and mortgage backed securities. Pricing for investments in this category is obtained from quotations from broker or pricing services. Non-exchange traded securities and exchange-traded securities held in commingled funds are classified as NAV assets.
(h)This category utilizes a diversified group of strategies that attempt to capture uncorrelated sources of income and includes publicly traded mutual funds, insurance-linked and asset-backed securities, commingled funds and limited partnership funds. Pricing for mutual funds in this category is obtained from quoted prices in actively traded markets. Prices for insurance-linked and asset-backed securities are obtained from quotations from broker or pricing services. Commingled funds and limited partnership funds are classified as NAV assets.
(i)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in private real estate and private debt. All investments in this category are classified as NAV assets.
The DTE Energy Company Master VEBA Trust holds 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-publicly traded commingled funds hold exchange-traded equity or debt securities and are valued based on NAVs. Non-exchange traded fixed income securities are valued by the trustee based upon quotations available from brokers or pricing services. 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 price source of a given security if the trustee challenges an assigned price and 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.
Defined Contribution Plans
The Registrants also sponsor defined contribution retirement savings plans. Participation in one of these plans is available to substantially all represented and non-represented employees. For substantially all employees, the Registrants match employee contributions up to certain predefined limits based upon eligible compensation and the employee’s contribution rate. Additionally, for eligible represented and non-represented employees who do not participate in the Pension Plans, the Registrants annually contribute an amount equivalent to 4% (8% for certain DTE Gas represented employees) of an employee's eligible pay to the employee's defined contribution retirement savings plan. For DTE Energy, the cost of these plans was $70 million, $73 million, and $65 million for the years ended December 31, 2021, 2020, and 2019, respectively. For DTE Electric, the cost of these plans was $34 million, $34 million, and $31 million for the years ended December 31, 2021, 2020, and 2019, respectively.
v3.22.0.1
Stock-Based Compensation
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Stock-Based Compensation STOCK-BASED COMPENSATION
DTE Energy’s stock incentive program permits the grant of incentive stock options, non-qualifying stock options, stock awards, performance shares, and performance units to employees and members of its Board of Directors. As a result of a stock award, a settlement of an award of performance shares, or by exercise of a participant’s stock option, DTE Energy may deliver common stock from its authorized but unissued common stock and/or from outstanding common stock acquired by or on behalf of DTE Energy in the name of the participant. Key provisions of the stock incentive program are:
•Authorized limit is 20,162,716 shares of common stock;
•Prohibits the grant of a stock option with an exercise price that is less than the fair market value of DTE Energy’s stock on the date of the grant; and
•Imposes the following award limits to a single participant in a single calendar year, (1) options for more than 500,000 shares of common stock; (2) stock awards for more than 150,000 shares of common stock; (3) performance share awards for more than 300,000 shares of common stock (based on the maximum payout under the award); or (4) more than 1,000,000 performance units, which have a face amount of $1.00 each.
DTE Energy records compensation expense at fair value over the vesting period for all awards it grants.
The following table summarizes the components of stock-based compensation for DTE Energy:
202120202019
(In millions)
Stock-based compensation expense$71 $63 $71 
Tax benefit$13 $12 $13 
Stock-based compensation cost capitalized in Property, plant, and equipment(a)
$— $— $16 
_______________________________________
(a)In DTE Electric's May 2020 rate order, the MPSC disallowed certain capital expenditures related to incentive compensation. Therefore, beginning in 2020, no stock-based compensation cost will be capitalized in Property, plant, and equipment.
Restricted Stock Awards
Stock awards granted under the plan are restricted for varying periods, generally for three years. Participants have all rights of a shareholder with respect to a stock award, including the right to receive dividends and vote the shares. Prior to vesting in stock awards, the participant: (i) may not sell, transfer, pledge, exchange, or otherwise dispose of shares; (ii) shall not retain custody of the share certificates; and (iii) will deliver to DTE Energy a stock power with respect to each stock award upon request.
The stock awards are recorded at cost that approximates fair value on the date of grant. The cost is amortized to compensation expense over the vesting period.
The fair value of awards vested were not material for the years ended December 31, 2021, 2020, and 2019. Compensation cost charged against income was $14 million, $13 million, and $11 million for the years ended December 31, 2021, 2020, and 2019, respectively.
Performance Share Awards
Performance shares awarded under the plan are for a specified number of shares of DTE Energy common stock that entitle the holder to receive a cash payment, shares of DTE Energy common stock, or a combination thereof. The final value of the award is determined by the achievement of certain performance objectives and market conditions. The awards vest at the end of a specified period, usually three years. Awards granted in 2021, 2020, and 2019 were primarily deemed to be equity awards. The DTE Energy stock price and number of probable shares attributable to market conditions for such equity awards are fair valued only at the grant date. DTE Energy accounts for performance share awards by accruing compensation expense over the vesting period based on: (i) the number of shares expected to be paid which is based on the probable achievement of performance objectives; and (ii) the closing stock price market value. The settlement of the award is based on the closing price at the settlement date.
DTE Energy recorded activity relating to performance share awards as follows:
202120202019
(In millions, except per share amounts)
Weighted average grant date fair value of awards granted (per share)$118.43 $129.68 $115.85 
Awards settled in cash(a)
$12 $21 $19 
Awards settled in stock(a)
$74 $53 $79 
Compensation expense$58 $50 $60 
_______________________________________
(a)Sum of awards settled in cash and stock approximates the intrinsic value of the awards.
During the vesting period, the recipient of a performance share award has no shareholder rights. During the period beginning on the date the performance shares are awarded and ending on the certification date of the performance objectives, the number of performance shares awarded will be increased, assuming full dividend reinvestment at the fair market value on the dividend payment date. The cumulative number of performance shares will be adjusted to determine the final payment based on the performance objectives achieved. Performance share awards are nontransferable and are subject to risk of forfeiture.
The following table summarizes DTE Energy’s performance share activity for the period ended December 31, 2021:
Performance SharesWeighted Average
Grant Date
Fair Value
Balance at December 31, 20201,127,437 $117.06 
Grants(a)
567,196 $118.43 
Forfeitures(b)
(162,091)$123.04 
Payouts(429,925)$107.84 
Balance at December 31, 20211,102,617 $120.33 
_______________________________________
(a)Includes 166,686 incremental shares granted in 2021 to DTE Energy employees who did not separate with DT Midstream. The shares were granted to preserve the value of unvested 2019-2021 awards, considering the impact from the spin-off of DT Midstream on DTE Energy's stock price.
(b)Includes the cancellation of 95,923 shares that were held by employees that separated due to the spin-off of DT Midstream.
Unrecognized Compensation Costs
As of December 31, 2021, DTE Energy's total unrecognized compensation cost related to non-vested stock incentive plan arrangements and the weighted average recognition period was as follows:
Unrecognized
Compensation
Cost		Weighted Average
to be Recognized
(In millions)(In years)
Stock awards$19 1.50
Performance shares44 1.04
$63 1.18
Allocated Stock-Based Compensation
DTE Electric received an allocation of costs from DTE Energy associated with stock-based compensation. DTE Electric's allocation for 2021, 2020, and 2019 for stock-based compensation expense was $45 million, $37 million, and $43 million, respectively.
v3.22.0.1
Segment and Related Information
 12 Months Ended
Dec. 31, 2021
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 2.3 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.
DTE Vantage, formerly the Power and Industrial Projects segment, 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 certain investments, including funds supporting regional development and economic growth.
DTE Energy completed the separation of DT Midstream on July 1, 2021, which was comprised of the Gas Storage and Pipelines segment and also certain DTE Energy holding company activity within the Corporate and Other segment. Amounts relating to DT Midstream have been classified as discontinued operations, and Gas Storage and Pipelines is no longer a reportable segment of DTE Energy. Refer to Note 4 to the Consolidated Financial Statements, “Dispositions and Impairments,” for additional information.
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, natural gas sales, and renewable natural gas sales in the following segments:
Year Ended December 31,
202120202019
(In millions)
Electric(a)
$64 $61 $56 
Gas14 16 12 
DTE Vantage575 464 596 
Energy Trading56 31 22 
Corporate and Other2 2 2 
$711 $574 $688 
_______________________________________
(a)Inter-segment billing for the Electric segment includes $4 million and $2 million relating to Non-utility operations for the years ended December 31, 2021 and 2020, respectively.
Centrally incurred costs such as labor and overheads are assigned directly to DTE Energy's business segments or allocated based on various cost drivers, depending on the nature of service provided.
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 also 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.
All inter-segment transactions and balances are eliminated in consolidation for DTE Energy. The Reclassifications and Eliminations group below also includes the reclassification of deferred tax assets, which are netted against deferred tax liabilities for presentation on the DTE Energy Consolidated Statements of Financial Position. Refer to Note 10 to the Consolidated Financial Statements, "Income Taxes," for additional information regarding the Registrants' deferred taxes.
Financial data of DTE Energy's business segments follows:
ElectricGasDTE VantageEnergy
Trading
Corporate and Other(a)
Reclassifications
and
Eliminations		Total from
Continuing
Operations		Discontinued
Operations		Total
(In millions)
2021
Operating Revenues — Utility operations$5,809 1,553 — — — (74)$7,288 
Operating Revenues — Non-utility operations$12 — 1,482 6,831 2 (651)$7,676 
Depreciation and amortization$1,122 177 71 6 1 — $1,377 
Interest expense$338 81 28 5 270 (92)$630 
Interest income$— (6)(23)(1)(84)92 $(22)
Equity in earnings of equity method investees$— 1 8 — 29 — $38 
Income Tax Expense (Benefit)$104 38 (31)(27)(214)— $(130)
Net Income (Loss) Attributable to DTE Energy Company$864 214 168 (83)(367)— $796 111 $907 
Investment in equity method investees$6 13 118 — 50 — $187 
Capital expenditures and acquisitions$3,016 621 69 6 — — $3,712 60 $3,772 
Goodwill$1,208 743 25 17 — — $1,993 
Total Assets$28,524 6,729 983 1,174 4,281 (1,972)$39,719 — $39,719 
_______________________________________
(a)Corporate and Other results include significant one-time items resulting from the separation of DT Midstream, including a loss on debt extinguishment of $376 million following the settlement of intercompany borrowings with DT Midstream and optional redemption of DTE Energy long-term debt. DTE Energy also recognized a tax benefit of $85 million for the remeasurement of state deferred tax liabilities following the separation of DT Midstream. Refer to Notes 10 and 14 to the Consolidated Financial Statements, "Income Taxes" and "Long-Term Debt," for additional information.
ElectricGasDTE VantageEnergy
Trading		Corporate
and
Other		Reclassifications
and
Eliminations		Total from
Continuing
Operations		Discontinued
Operations		Total
(In millions)
2020
Operating Revenues — Utility operations$5,506 1,414 — — — (75)$6,845 
Operating Revenues — Non-utility operations$14 — 1,224 3,863 2 (525)$4,578 
Depreciation and amortization$1,057 157 72 5 1 — $1,292 
Interest expense$337 80 37 6 325 (184)$601 
Interest income$(4)(5)(22)(2)(180)184 $(29)
Equity in earnings of equity method investees$— 1 17 — 8 — $26 
Income Tax Expense (Benefit)$108 48 (40)12 (91)— $37 
Net Income (Loss) Attributable to DTE Energy Company$777 186 134 36 (79)— $1,054 314 $1,368 
Investment in equity method investees$6 12 125 — 34 — $177 
Capital expenditures and acquisitions$2,701 574 186 5 — — $3,466 517 $3,983 
Goodwill$1,208 743 25 17 — — $1,993 
Total Assets$26,588 6,339 696 807 5,063 (2,073)$37,420 8,076 $45,496 
ElectricGasDTE VantageEnergy
Trading		Corporate
and
Other		Reclassifications
and
Eliminations		Total from
Continuing
Operations		Discontinued
Operations		Total
(In millions)
2019
Operating Revenues — Utility operations$5,224 1,482 — — — (68)$6,638 
Operating Revenues — Non-utility operations$5 — 1,560 4,610 2 (647)$5,530 
Depreciation and amortization$949 144 69 6 1 — $1,169 
Interest expense$315 78 33 8 266 (132)$568 
Interest income$(2)(6)(9)(4)(120)132 $(9)
Equity in earnings of equity method investees$1 2 14 — (3)— $14 
Income Tax Expense (Benefit)$137 62 (63)17 (82)— $71 
Net Income (Loss) Attributable to DTE Energy Company$714 185 133 49 (126)— $955 214 $1,169 
Investment in equity method investees$5 11 130 — 31 — $177 
Capital expenditures and acquisitions$2,368 530 54 5 — — $2,957 2,510 $5,467 
Goodwill$1,208 743 25 17 — — $1,993 
Total Assets$24,617 5,717 537 798 4,779 (1,843)$34,605 7,663 $42,268 
Reclassifications and Eliminations include $14 million, $26 million, and $27 million of Operating Revenues — Non-utility operations for the years ended December 31, 2021, 2020, and 2019, respectively, for eliminations related to DTE Energy's prior Gas Storage and Pipelines segment that remain in continuing operations. Eliminations for these revenues are offset by related cost eliminations and have no impact on DTE Energy net income.
v3.22.0.1
Related Party Transactions
 12 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
Related Party Transactions RELATED PARTY TRANSACTIONSDTE Electric has agreements with affiliated companies to sell energy for resale, purchase fuel and power, provide fuel supply services, and provide power plant operation and maintenance services. DTE Electric also has agreements with certain DTE Energy affiliates where it charges the affiliates for their use of the shared capital assets of DTE Electric. A shared services company accumulates various corporate support expenses and charges various subsidiaries of DTE Energy, including DTE Electric. DTE Electric records federal, state, and local income taxes payable to or receivable from DTE Energy based on its federal, state, and local tax provisions.
The following is a summary of DTE Electric's transactions with affiliated companies:
202120202019
(In millions)
Revenues and Other Income
Energy sales$9 $8 $10 
Other services and interest$2 $2 $5 
Shared capital assets$49 $47 $42 
Costs
Fuel and purchased power$13 $16 $6 
Other services and interest$— $1 $24 
Corporate expenses$391 $367 $372 
Other
Dividends declared$588 $539 $494 
Dividends paid$588 $539 $494 
Capital contribution from DTE Energy$555 $636 $180 
DTE Electric's Accounts receivable and Accounts payable related to Affiliates are payable upon demand and are generally settled in cash within a monthly business cycle. Notes receivable and Short-term borrowings related to Affiliates are subject to a credit agreement with DTE Energy whereby short-term excess cash or cash shortfalls are remitted to or funded by DTE Energy. This credit arrangement involves the charge and payment of interest at market-based rates. Refer to DTE Electric's Consolidated Statements of Financial Position for affiliate balances at December 31, 2021 and 2020.
There were $2 million and $20 million in charitable contributions made by DTE Electric to the DTE Energy Foundation for the years ended December 31, 2021 and 2020, respectively, and no contributions for the year ended December 31, 2019. The DTE Energy Foundation is a non-consolidated not-for-profit private foundation, the purpose of which is to contribute to and assist charitable organizations.
For a discussion of other related party transactions impacting DTE Electric, see Notes 20 and 21 to the Consolidated Financial Statements, "Retirement Benefits and Trusteed Assets" and "Stock-Based Compensation," respectively.
v3.22.0.1
Supplementary Quarterly Financial Information (Unaudited)
 12 Months Ended
Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]  
Supplementary Quarterly Financial Information (Unaudited) SUPPLEMENTARY QUARTERLY FINANCIAL INFORMATION (UNAUDITED)
The Registrants have adopted the SEC amendment to Regulation S-K Item 302(a) which requires disclosure of supplemental quarterly financial data only if material retrospective adjustments have been applied. For DTE Energy, the information has been presented below to reflect the impact of the discontinued operations of DT Midstream. No retrospective adjustments have been applied for DTE Electric.
DTE Energy
The sum of quarterly earnings per share may not equal year-end amounts, since quarterly computations are based on weighted average common shares outstanding during each quarter.
First
Quarter		Second
Quarter		Third
Quarter		Fourth
Quarter		Year
(In millions, except per share amounts)
2021
Operating Revenues$3,581 $3,021 $3,715 $4,647 $14,964 
Operating Income433 242 405 415 1,495 
Net Income from Continuing Operations(a)
317 114 55 300 786 
Net Income (Loss) from Discontinued Operations80 65 (33)5 117 
Net Income397 179 22 305 903 
Net Income Attributable to DTE Energy Company$397 $179 $25 $306 $907 
Basic Earnings per Share
  Continuing Operations$1.65 $0.60 $0.30 $1.56 $4.11 
  Discontinued Operations0.40 0.32 (0.17)0.02 0.57 
Total$2.05 $0.92 $0.13 $1.58 $4.68 
Diluted Earnings per Share
  Continuing Operations$1.65 $0.60 $0.30 $1.55 $4.10 
  Discontinued Operations0.40 0.32 (0.17)0.02 0.57 
Total$2.05 $0.92 $0.13 $1.57 $4.67 
2020
Operating Revenues$2,852 $2,411 $3,080 $3,080 $11,423 
Operating Income445 263 479 368 1,555 
Net Income from Continuing Operations268 201 370 206 1,045 
Net Income from Discontinued Operations74 76 107 69 326 
Net Income342 277 477 275 1,371 
Net Income Attributable to DTE Energy Company$340 $277 $476 $275 $1,368 
Basic Earnings per Share
  Continuing Operations$1.39 $1.06 $1.93 $1.08 $5.46 
  Discontinued Operations0.38 0.38 0.54 0.34 1.63 
Total$1.77 $1.44 $2.47 $1.42 $7.09 
Diluted Earnings per Share
  Continuing Operations$1.39 $1.06 $1.92 $1.08 $5.45 
  Discontinued Operations0.37 0.38 0.54 0.34 1.63 
Total$1.76 $1.44 $2.46 $1.42 $7.08 
_______________________________________
(a)Third Quarter 2021 results include significant one-time items resulting from the separation of DT Midstream, including a loss on debt extinguishment of $376 million following the settlement of intercompany borrowings with DT midstream and optional redemption of DTE Energy long-term debt. Refer to Note 14 to the Consolidated Financial Statements, "Long-Term Debt," for additional information. Third Quarter 2021 results also include a tax benefit of $85 million for the remeasurement of state deferred tax liabilities following the separation of DT Midstream. Refer to Note 10 to the Consolidated Financial Statements, "Income Taxes," for additional information.
v3.22.0.1
Schedule II - Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Schedule II - Valuation and Qualifying Accounts
DTE Energy Company
Schedule II — Valuation and Qualifying Accounts
Year Ending December 31,
202120202019
(In millions)
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)
Balance at Beginning of Period$104 $83 $91 
Additions:
Charged to costs and expenses54 105 103 
Charged to other accounts(a)
61 50 56 
Deductions(b)
(127)(134)(167)
Balance at End of Period$92 $104 $83 
_______________________________________
(a)Collection of accounts previously written off
(b)Uncollectible accounts written off.

DTE Electric Company
Schedule II — Valuation and Qualifying Accounts
Year Ending December 31,
202120202019
(In millions)
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Electric's Consolidated Statements of Financial Position)
Balance at Beginning of Period$57 $46 $53 
Additions:
Charged to costs and expenses36 61 65 
Charged to other accounts(a)
38 30 36 
Deductions(b)
(77)(80)(108)
Balance at End of Period$54 $57 $46 
_______________________________________
(a)Collection of accounts previously written off.
(b)Uncollectible accounts written off.
v3.22.0.1
Significant Accounting Policies (Policies)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Basis of Presentation
Basis of Presentation
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 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 the Registrants were reclassified to match the current year's Consolidated Financial Statements presentation.
Separation of DT Midstream
On July 1, 2021, DTE Energy completed the previously announced separation of its natural gas pipeline, storage and gathering non-utility business. Effective with the separation, DTE retains no ownership in the new company, DT Midstream, which was formerly comprised of DTE Energy's Gas Storage and Pipelines segment and also included certain DTE Energy holding company activity within the Corporate and Other segment. Gas Storage and Pipelines is no longer a reportable segment of DTE Energy, and financial results of DT Midstream are presented as Income from discontinued operations, net of taxes on DTE Energy's Consolidated Statements of Operations. Assets and liabilities of DT Midstream are also presented as discontinued operations on DTE Energy's Consolidated Statements of Financial Position. Prior periods have been recast to reflect this presentation.
No adjustments were made to the historical activity within the Consolidated Statements of Comprehensive Income, Consolidated Statements of Cash Flows, or the Consolidated Statements of Changes in Equity. Unless noted otherwise, discussion in the Notes to the Consolidated Financial Statements relate to continuing operations. Refer to Note 4 to the Consolidated Financial Statements, “Dispositions and Impairments,” for additional information regarding the separation of DT Midstream and discontinued operations.
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 equity investment is valued at cost minus any impairments, if applicable. 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.
During the third quarter of 2021, the Registrants performed reassessments of certain VIEs owned by DT Midstream. Upon the separation of DT Midstream, DTE Energy no longer owns any interest in SGG, owner and operator of certain midstream natural gas assets. Therefore, SGG has been removed from the amounts for DTE Energy's consolidated VIEs in the table below. Additionally, as a result of the separation of DT Midstream, DTE Energy no longer has an equity interest in NEXUS, owner of a pipeline which transports shale gas to Ohio, Michigan, and Ontario market centers. DTE Energy has removed its equity investment in NEXUS from the amounts for its non-consolidated VIEs. The Registrants maintain a variable interest in NEXUS relating to DTE Electric's transportation services contract. Assets, liabilities, and earnings related to SGG and NEXUS are included in discontinued operations in the Consolidated Financial Statements.
During the fourth quarter of 2021, DTE Energy also performed reassessments of REF entities that were previously concluded to be VIEs. The REF entities have ceased operations as of December 31, 2021 and DTE Energy has concluded the REF entities are no longer VIEs. Therefore, the REF entities have been removed from the VIE tables below.
Other entities within the DTE Vantage 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.
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. As of December 31, 2021, 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 December 31, 2021, 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. For non-consolidated VIEs, the maximum risk exposure of the Registrants is generally limited to their investment, notes receivable, and future funding commitments.
Other Income
Other Income
Other income for the Registrants is recognized for non-operating income such as equity earnings of equity method investees, allowance for equity funds used during construction, contract services, and gains from trading securities, primarily from those held in DTE Energy's rabbi trust. The DTE Vantage segment also recognizes Other income in connection with the sale of membership interests in reduced emissions fuel facilities to investors. In exchange for the cash received, the investors receive a portion of the economic attributes of the facilities, including income tax attributes. The transactions are not treated as a sale of membership interests for financial reporting purposes. Other income related to fixed non-refundable cash payments received from investors for which the earnings process is not contingent upon production of refined coal is recognized on a straight-line basis over the non-cancelable contract term as the economic benefit from the ownership of the facility is transferred to investors. Other income related to cash payments that is contingent upon production of refined coal is considered earned and recognized when the contingency regarding the timing and amount of payment is resolved, generally as refined coal is produced and tax credits are generated.
Accounting for ISO Transactions
Accounting for ISO Transactions
DTE Electric participates in the energy market through MISO. MISO requires that DTE Electric submit hourly day-ahead, real-time, and FTR bids and offers for energy at locations across the MISO region. DTE Electric accounts for MISO transactions on a net hourly basis in each of the day-ahead, real-time, and FTR markets. In any single hour, transactions in each of the MISO energy markets are netted based on MWh to determine if DTE Electric is in a net sale or purchase position. Net purchases are recorded in Fuel, purchased power, and gas — utility and net sales are recorded in Operating Revenues — Utility operations on the Registrants' Consolidated Statements of Operations.
The Energy Trading segment participates in the energy markets through various ISOs and RTOs. These markets require that Energy Trading submits hourly day-ahead, real-time bids and offers for energy at locations across each region. Energy Trading submits bids in the annual and monthly auction revenue rights and FTR auctions to the RTOs. Energy Trading accounts for these transactions on a net hourly basis for the day-ahead, real-time, and FTR markets. These transactions are related to trading contracts which, if derivatives, are presented on a net basis in Operating Revenues — Non-utility operations, and if non-derivatives, the realized gains and losses for sales are recorded in Operating Revenues — Non-utility operations and purchases are recorded in Fuel, purchased power, gas, and other — non-utility in the DTE Energy Consolidated Statements of Operations.
DTE Electric and Energy Trading record accruals for future net purchases adjustments based on historical experience and reconcile accruals to actual costs when invoices are received from MISO and other ISOs and RTOs.
Derivatives DerivativesEnergy Trading classifies derivative transactions as revenue or expense based on the intent of the transaction (buy or sell). Revenues are recorded on a gross or net basis within the income statement depending upon whether it represents a non-trading activity or trading activity, respectively.
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, some 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 2024. 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.
DTE Vantage — This segment manages and operates renewable gas recovery projects, industrial energy projects, reduced emissions fuel projects, 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 December 31, 2021 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.
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, if any.
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, 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
Financing receivables are primarily composed of trade receivables, notes receivable, and unbilled revenue. The Registrants' financing receivables are stated at net realizable value.
DTE Energy had unbilled revenues of $1.0 billion and $0.8 billion at December 31, 2021 and 2020, respectively, including $270 million and $260 million of DTE Electric unbilled revenues, respectively, included in Customer Accounts receivable.
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 December 31, 2021.
DTE EnergyDTE Electric
Year of origination
202120202019 and priorTotal2021 and prior
(In millions)
Notes receivable
Internal grade 1$— $— $21 $21 $14 
Internal grade 216 107 6 129 3 
Total notes receivable(a)
$16 $107 $27 $150 $17 
Net investment in leases
Net investment in leases, internal grade 1$— $1 $38 $39 $— 
Net investment in leases, internal grade 2— 159 1 160 — 
Total net investment in leases(a)
$— $160 $39 $199 $— 
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(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 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 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 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.
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 tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves:
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2021$101 $3 $104 $57 
Current period provision53 1 54 36 
Write-offs charged against allowance(126)(1)(127)(77)
Recoveries of amounts previously written off61 — 61 38 
Ending reserve balance, December 31, 2021$89 $3 $92 $54 
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2020(a)
$79 $4 $83 $46 
Current period provision102 3 105 61 
Write-offs charged against allowance(130)(4)(134)(80)
Recoveries of amounts previously written off50 — 50 30 
Ending reserve balance, December 31, 2020$101 $3 $104 $57 
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(a)DTE Energy Trade accounts receivable beginning reserve balance excludes $8 million related to the discontinued operations of DT Midstream. Prospective activity includes only the continuing operations of DTE Energy.
Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows:
Year Ended December 31,
202120202019
(In millions)
DTE Energy$55 $105 $106 
DTE Electric$36 $62 $65 
There are no material amounts of past due financing receivables for the Registrants as of December 31, 2021.
Inventories
Inventories
Inventory related to utility and non-utility operations is valued at the lower of cost or net realizable value, where cost is generally valued using average cost. Inventory primarily includes fuel, gas, materials, and supplies. Other inventories include RECs, emission allowances, and other environmental products in the Energy Trading segment.
Property, Retirement and Maintenance, and Depreciation and Amortization
Property, Retirement and Maintenance, and Depreciation and Amortization
Property is stated at cost and includes construction-related labor, materials, overheads, and AFUDC for utility property. The cost of utility properties retired is charged to accumulated depreciation. Expenditures for maintenance and repairs are charged to expense when incurred.
Utility property at DTE Electric and DTE Gas is depreciated over its estimated useful life using straight-line rates approved by the MPSC. DTE Energy's non-utility property is depreciated over its estimated useful life using the straight-line method. Depreciation and amortization expense also includes the amortization of certain regulatory assets for the Registrants.
The cost of nuclear fuel is capitalized. The amortization of nuclear fuel is included within Fuel, purchased power, and gas — utility in the DTE Energy Consolidated Statements of Operations, and Fuel and purchased power in the DTE Electric Consolidated Statements of Operations, and is recorded using the units-of-production method.
Capitalized software costs are classified as Property, plant, and equipment and the related amortization is included in accumulated depreciation and amortization on the Registrants' Consolidated Financial Statements. The Registrants capitalize the costs associated with computer software developed or obtained for use in their businesses. The Registrants amortize capitalized software costs on a straight-line basis over the expected period of benefit, ranging from 3 to 15 years for both DTE Energy and DTE Electric.
Long-Lived Assets
Long-Lived Assets
Long-lived assets are reviewed for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable. If the carrying amount of the asset exceeds the expected undiscounted future cash flows generated by the asset, an impairment loss is recognized resulting in the asset being written down to its estimated fair value. Assets to be disposed of are reported at the lower of the carrying amount or fair value, less costs to sell.
Intangible Assets DTE Energy amortizes contract intangible assets on a straight-line basis over the expected period of benefit.
Cloud Computing Arrangements
Cloud Computing Arrangements
Effective upon the adoption of ASU No. 2018-15 in January 2020, the Registrants capitalize implementation costs incurred in a cloud computing arrangement that is a service contract consistent with capitalized implementation costs incurred to develop or obtain internal-use software. Capitalized costs are recorded in Other noncurrent assets on the Consolidated Statements of Financial Position and amortization of the costs is reflected in Operation and maintenance within the Consolidated Statements of Operations. Costs are amortized on a straight-line basis over the life of the contract. Contracts primarily involve the implementation or upgrade of cloud-based solutions for generation and distribution operations and customer service support.
Excise and Sales Taxes and Income Taxes
Excise and Sales Taxes
The Registrants record the billing of excise and sales taxes as a receivable with an offsetting payable to the applicable taxing authority, with no net impact on the Registrants’ Consolidated Statements of Operations.
Deferred tax assets and liabilities are recognized for the estimated future tax effect of temporary differences between the tax basis of assets or liabilities and the reported amounts in the Registrants' Consolidated Financial Statements.
Deferred Debt Costs
Deferred Debt Costs
The costs related to the issuance of long-term debt are deferred and amortized over the life of each debt issue. The deferred amounts are included as a direct deduction from the carrying amount of each debt issue in Mortgage bonds, notes, and other and Junior subordinated debentures on DTE Energy's Consolidated Statements of Financial Position and in Mortgage bonds, notes, and other on DTE Electric's Consolidated Statements of Financial Position. In accordance with MPSC regulations applicable to DTE Energy’s electric and gas utilities, the unamortized discount, premium, and expense related to utility debt redeemed with a refinancing are amortized over the life of the replacement issue. Discounts, premiums, and expense on early redemptions of debt associated with DTE Energy's non-utility operations are charged to earnings.
Investments in Debt and Equity Securities Investments in Debt and Equity SecuritiesThe Registrants generally record investments in debt and equity securities at market value with unrealized gains or losses included in earnings. Changes in the fair value of Fermi 2 nuclear decommissioning investments are recorded as adjustments to Regulatory assets or liabilities, due to a recovery mechanism from customers. The Registrants' equity investments are reviewed for impairment each reporting period. If the assessment indicates that an impairment exists, a loss is recognized resulting in the equity investment being written down to its estimated fair value.
DTE Energy Foundation
DTE Energy Foundation
DTE Energy's contributions to the DTE Energy Foundation were $25 million and $20 million for the years ended December 31, 2021 and December 31, 2020, respectively. There were no charitable contributions made to the DTE Energy Foundation for the year ended December 31, 2019. The DTE Energy Foundation is a non-consolidated not-for-profit private foundation, the purpose of which is to contribute to and assist charitable organizations.
New Accounting Pronouncements
Recently Adopted 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 Registrants adopted the ASU effective January 1, 2021 using the modified retrospective and prospective approaches, where applicable. The adoption of the ASU did 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, as amended. The amendments in this update provide optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. The optional relief is temporary and cannot be applied to contract modifications and hedging relationships entered into or evaluated after December 31, 2022. The Registrants adopted the ASU and elected the optional expedients for contract modifications prospectively. The adoption of the ASU did not have a significant impact on the registrant's 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 Registrants adopted the ASU effective January 1, 2021 using the modified retrospective approach. The adoption of the ASU did not have a significant impact on the Registrants' Consolidated Financial Statements.
Recently Issued Pronouncements
In July 2021, the FASB issued ASU No. 2021-05, Leases (Topic 842): Lessors – Certain Leases with Variable Lease Payments. The amendments in this update modify lease classification requirements for lessors, providing that lease contracts with variable lease payments that do not depend on a reference index or a rate should be classified as operating leases if they would have been classified as a sales-type or direct financing lease and resulted in the recognition of a selling loss at lease commencement. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2021, and interim periods therein. The Registrants will apply the guidance prospectively. The Registrants are currently assessing the impact of this standard on their Consolidated Financial Statements.
In October 2021, The FASB issued ASU No. 2021-08, Business Combinations (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. The amendments in this update require contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC 606, Revenue from Contracts with Customers. Historically, such amounts were recognized by the acquirer at fair value in acquisition accounting. The ASU is effective for the Registrants for fiscal years beginning after December 15, 2022, and interim periods therein. Early adoption is permitted. The Registrants will apply the guidance prospectively to acquisitions occurring on or after the effective date.
Revenue Revenue is measured based upon the consideration specified in a contract with a customer at the time when performance obligations are satisfied. A performance obligation is a promise in a contract to transfer a distinct good or service or a series of distinct goods or services to the customer. The Registrants recognize revenue when performance obligations are satisfied by transferring control over a product or service to a customer. The Registrants have determined control to be transferred when the product is delivered, or the service is provided to the customer.Rates for DTE Electric and DTE Gas include provisions to adjust billings for fluctuations in fuel and purchased power costs, cost of natural gas, and certain other costs. Revenues are adjusted for differences between actual costs subject to reconciliation and the amounts billed in current rates. Under or over recovered revenues related to these cost recovery mechanisms are included in Regulatory assets or liabilities on the Registrants' Consolidated Statements of Financial Position and are recovered or returned to customers through adjustments to the billing factors.
Asset Retirement Obligations
DTE Electric has a legal retirement obligation for the decommissioning costs for its Fermi 1 and Fermi 2 nuclear plants, dismantlement of facilities located on leased property, and various other operations. DTE Electric has conditional retirement obligations for asbestos and PCB removal at certain of its power plants and various distribution equipment. DTE Gas has conditional retirement obligations for gas pipelines, certain service centers, compressor and gate stations. The Registrants recognize such obligations as liabilities at fair market value when they are incurred, which generally is at the time the associated assets are placed in service. Fair value is measured using expected future cash outflows discounted at the Registrants' credit-adjusted risk-free rate. For its utility operations, the Registrants recognize in the Consolidated Statements of Operations removal costs in accordance with regulatory treatment. Any differences between costs recognized related to asset retirement and those reflected in rates are recognized as either a Regulatory asset or liability on the Consolidated Statements of Financial Position.
If a reasonable estimate of fair value cannot be made in the period in which the retirement obligation is incurred, such as for assets with indeterminate lives, the liability is recognized when a reasonable estimate of fair value can be made. Natural gas storage system and certain other distribution assets for DTE Gas and substations, manholes, and certain other distribution assets for DTE Electric have an indeterminate life. Therefore, no liability has been recorded for these assets.
Regulatory Assets and Liabilities
Regulatory Assets and Liabilities
DTE Electric and DTE Gas are required to record Regulatory assets and liabilities for certain transactions that would have been treated as revenue or expense in non-regulated businesses. Continued applicability of regulatory accounting treatment requires that rates be designed to recover specific costs of providing regulated services and be charged to and collected from customers. Future regulatory changes could result in the discontinuance of this accounting treatment for Regulatory assets and liabilities for some or all of the Registrants' businesses and may require the write-off of the portion of any Regulatory asset or liability that was no longer probable of recovery through regulated rates. Management believes that currently available facts support the continued use of Regulatory assets and liabilities and that all Regulatory assets and liabilities are recoverable or refundable in the current regulatory environment.
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 December 31, 2021 and 2020. 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 limited partnerships, including private equity, private real estate and private credit. 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 $199 million and $183 million as of December 31, 2021 and 2020, respectively.
Hedge funds and similar investments utilize a diversified group of strategies that attempt to capture uncorrelated sources of return. These investments include publicly traded mutual funds that are valued using quoted prices in actively traded markets, as well as insurance-linked and asset-backed securities and that are valued using quotations from broker or pricing services.
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, 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 $18 million outstanding at December 31, 2021 and $7 million at December 31, 2020, 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 $37 million and $9 million at December 31, 2021 and 2020, 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 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, gas, and other — non-utility.
Lessee
Lessee
Leases at DTE Energy are primarily comprised of various forms of equipment, computer hardware, coal railcars, production facilities, buildings, and certain easement leases with terms ranging from approximately 2 to 40 years. Leases at DTE Electric are primarily comprised of various forms of equipment, computer hardware, coal railcars, and certain easement leases with terms ranging from approximately 2 to 40 years.
A lease is deemed to exist when the Registrants have the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration paid. The right to control is deemed to occur when the Registrants have the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Lease liabilities are determined utilizing a discount rate to determine the present values of lease payments. Topic 842 requires the use of the rate implicit in the lease when it is readily determinable. When the rate implicit in the lease is not readily determinable, the incremental borrowing rate is used. The Registrants have determined their respective incremental borrowing rates based upon the rate of interest that would have been paid on a collateralized basis over similar tenors to that of the leases. The incremental borrowing rates for DTE Electric and DTE Gas have been determined utilizing respective secured borrowing rates for first mortgage bonds with like tenors of remaining lease terms. Incremental borrowing rates for non-utility entities have been determined utilizing an implied secured borrowing rate based upon an unsecured rate for a similar tenor of remaining lease terms, which is then adjusted for the estimated impact of collateral.
Certain leases of the Registrants contain escalation clauses whereby the payments are adjusted for consumer price or labor indices. DTE Energy has leases with non-index based escalation clauses for fixed dollar or percentage increases. DTE Electric has leases with non-index based escalation clauses for fixed dollar increases. DTE Energy also has leases with variable payments based upon usage of, or revenues associated with, the leased assets. DTE Electric also has leases with variable payments based upon the usage of the leased assets.
Certain leases of easements and coal railcars contain provisions whereby the Registrants have the option to terminate the lease agreement by giving notice of such termination during the time frames specified in the respective lease. The Registrants have considered such provisions in the determination of the lease term when it is reasonably certain that the lease would be terminated.
The Registrants have certain leases which contain purchase options. Based upon the nature of the leased property and terms of the purchase options, the Registrants have determined it is not reasonably certain that such purchase options will be utilized. Thus, the impact of the purchase options has not been included in the determination of right-of-use assets and lease liabilities for the subject leases.
The Registrants have certain leases which contain renewal options. Where the renewal options were deemed reasonably certain to occur, the impacts of such options were included in the determination of the right of use assets and lease liabilities.
The Registrants have agreements with lease and non-lease components, which are generally accounted for separately. Consideration in a lease is allocated between lease and non-lease components based upon the estimated relative standalone prices. The Registrants have certain coal railcar leases for which non-lease and lease components are accounted for as a single lease component, as permitted under Topic 842.
Lessor
Lessor
During the first quarter 2021, 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 an additional net investment of $31 million. DTE Energy also leases a portion of its pipeline system through a finance lease contract that has been renewed through 2025, with additional renewal options reasonably certain to be exercised through 2040.
DTE Energy also leases various assets under operating leases for a pipeline, energy facilities and related equipment. Such leases are comprised of both fixed payments and variable payments which are contingent on volumes, with terms ranging from 2 to 24 years. Generally, the operating leases do not have renewal provisions or options to purchase the assets at the end of the lease. The operating leases generally do not have termination for convenience provisions. Termination may be allowed under specific circumstances stated in the lease contract, such as under an event of default.
Certain of the finance and operating leases have lease terms that extend to the end of the estimated economic life of the leased assets, thereby resulting in no residual value. Any remaining residual values under the finance and operating leases are expected to be recovered through rates, renewals or new lease contracts. Residual values have been determined using the estimated economic life of the leased assets. The finance and operating leases do not contain residual value guarantees.
Certain of the operating leases have both lease and non-lease components. The lease and non-lease components are allocated based upon estimated relative standalone selling prices.
A lease is deemed to exist when the Registrants have provided other parties with the right to control the use of identified property, plant or equipment, as conveyed through a contract, for a certain period of time and consideration received. The right to control is deemed to occur when the Registrants have provided other parties with the right to obtain substantially all of the economic benefits of the identified assets and the right to direct the use of such assets.
Stock-Based Compensation DTE Energy records compensation expense at fair value over the vesting period for all awards it grants.
v3.22.0.1
Organization and Basis of Presentation (Tables)
 12 Months Ended
Dec. 31, 2021
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 December 31, 2021 and 2020. 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:
December 31,
20212020
(In millions)
ASSETS
Cash and cash equivalents$11 $20 
Restricted cash6 — 
Accounts receivable1 28 
Inventories3 107 
Property, plant, and equipment, net4 14 
Notes receivable and other70 33 
$95 $202 
LIABILITIES
Accounts payable$5 $22 
Short-term borrowings75 38 
Other current and long-term liabilities— 4 
$80 $64 
Summary of Amounts For Nonconsolidated Variable Interest Entities
Amounts for DTE Energy's non-consolidated VIEs are as follows:
December 31,
20212020
(In millions)
Investments in equity method investees$172 $159 
Notes receivable$13 $21 
Future funding commitments$3 $6 
v3.22.0.1
Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Schedule of Other Income
The following is a summary of DTE Energy's Other income:
202120202019
(In millions)
Income from REF entities$141 $139 $130 
Equity earnings of equity method investees38 26 14 
Contract services27 28 29 
Allowance for equity funds used during construction27 25 24 
Gains from rabbi trust securities(a)
8 28 37 
Other13 13 16 
$254 $259 $250 
_______________________________________
(a)Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations.
The following is a summary of DTE Electric's Other income:
202120202019
(In millions)
Contract services$27 $28 $32 
Allowance for equity funds used during construction25 23 22 
Gains from rabbi trust securities allocated from DTE Energy(a)
8 28 37 
Other11 8 16 
$71 $87 $107 
_______________________________________
(a)Losses from rabbi trust securities are recorded separately to Other expenses on the Consolidated Statements of Operations.
Schedule of Accumulated Other Comprehensive Income (Loss)
The following table summarizes the changes in DTE Energy's Accumulated other comprehensive income (loss) by component(a) for the years ended December 31, 2021 and 2020:
Net Unrealized Gain (Loss) on Derivatives
Benefit Obligations(b)
Foreign Currency TranslationTotal
(In millions)
Balance, December 31, 2019$(25)$(117)$(6)$(148)
Other comprehensive income (loss) before reclassifications(3)(2)1 (4)
Amounts reclassified from Accumulated other comprehensive loss5 10 — 15 
Net current period Other comprehensive income2 8 1 11 
Balance, December 31, 2020$(23)$(109)$(5)$(137)
Other comprehensive income before reclassifications1 1 — 2 
Amounts reclassified from Accumulated other comprehensive loss6 7 — 13 
Net current period Other comprehensive income7 8 — 15 
Separation of DT Midstream5 — 5 10 
Balance, December 31, 2021$(11)$(101)$— $(112)
______________________________________
(a)All amounts are net of tax, except for Foreign currency translation.
(b)The amounts reclassified from Accumulated other comprehensive income (loss) are included in the computation of the net periodic pension and other postretirement benefit costs (see Note 20 to the Consolidated Financial Statements, "Retirement Benefits and Trusteed Assets").
Schedule of Financing Receivables Classified by Internal Grade of Credit Risk
The following represents the Registrants' financing receivables by year of origination, classified by internal grade of credit risk. The related credit quality indicators and risk ratings utilized to develop the internal grades have been updated through December 31, 2021.
DTE EnergyDTE Electric
Year of origination
202120202019 and priorTotal2021 and prior
(In millions)
Notes receivable
Internal grade 1$— $— $21 $21 $14 
Internal grade 216 107 6 129 3 
Total notes receivable(a)
$16 $107 $27 $150 $17 
Net investment in leases
Net investment in leases, internal grade 1$— $1 $38 $39 $— 
Net investment in leases, internal grade 2— 159 1 160 — 
Total net investment in leases(a)
$— $160 $39 $199 $— 
_______________________________________
(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 on the Consolidated Statements of Financial Position.
Schedule of Roll-Forward of Activity for Financing Receivables Credit Loss Reserves
The following tables present a roll-forward of the activity for the Registrants' financing receivables credit loss reserves:
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2021$101 $3 $104 $57 
Current period provision53 1 54 36 
Write-offs charged against allowance(126)(1)(127)(77)
Recoveries of amounts previously written off61 — 61 38 
Ending reserve balance, December 31, 2021$89 $3 $92 $54 
DTE EnergyDTE Electric
Trade accounts receivableOther receivablesTotalTrade and other accounts receivable
(In millions)
Beginning reserve balance, January 1, 2020(a)
$79 $4 $83 $46 
Current period provision102 3 105 61 
Write-offs charged against allowance(130)(4)(134)(80)
Recoveries of amounts previously written off50 — 50 30 
Ending reserve balance, December 31, 2020$101 $3 $104 $57 
_______________________________________
(a)DTE Energy Trade accounts receivable beginning reserve balance excludes $8 million related to the discontinued operations of DT Midstream. Prospective activity includes only the continuing operations of DTE Energy.
Schedule of Uncollectible Expense
Uncollectible expense for the Registrants is primarily comprised of the current period provision for allowance for doubtful accounts and is summarized as follows:
Year Ended December 31,
202120202019
(In millions)
DTE Energy$55 $105 $106 
DTE Electric$36 $62 $65 
Schedule of Finite-Lived Intangible Assets
The Registrants have certain Intangible assets as shown below:
December 31, 2021December 31, 2020
Useful LivesGross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
(In millions)
Intangible assets subject to amortization
Contract intangibles
6 to 26 years
$271 $(98)$173 $271 $(83)$188 
Intangible assets not subject to amortization(a)
4 — 4 11 — 11 
DTE Energy Long-term intangible assets$275 $(98)$177 $282 $(83)$199 
______________________________________
(a)Amounts primarily include Renewable energy credits and Gas carbon offsets that are charged to expense, using average cost, as the credits are consumed in the operation of the business. Amounts include DTE Electric intangible assets of $2 million and $11 million as of December 31, 2021 and 2020, respectively, and are included in Other Assets — Other on the DTE Electric Consolidated Statements of Financial Position.
Schedule of Indefinite-Lived Intangible Assets
The Registrants have certain Intangible assets as shown below:
December 31, 2021December 31, 2020
Useful LivesGross Carrying ValueAccumulated AmortizationNet Carrying ValueGross Carrying ValueAccumulated AmortizationNet Carrying Value
(In millions)
Intangible assets subject to amortization
Contract intangibles
6 to 26 years
$271 $(98)$173 $271 $(83)$188 
Intangible assets not subject to amortization(a)
4 — 4 11 — 11 
DTE Energy Long-term intangible assets$275 $(98)$177 $282 $(83)$199 
______________________________________
(a)Amounts primarily include Renewable energy credits and Gas carbon offsets that are charged to expense, using average cost, as the credits are consumed in the operation of the business. Amounts include DTE Electric intangible assets of $2 million and $11 million as of December 31, 2021 and 2020, respectively, and are included in Other Assets — Other on the DTE Electric Consolidated Statements of Financial Position.
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The following table summarizes DTE Energy's estimated contract intangible amortization expense expected to be recognized during each year through 2026:
20222023202420252026
(In millions)
Estimated amortization expense$16 $16 $16 $16 $14 
Schedule of Accounting Policies
See the following notes for other accounting policies impacting the Registrants’ Consolidated Financial Statements:
NoteTitle
5Revenue
6Property, Plant, and Equipment
8Asset Retirement Obligations
9Regulatory Matters
10Income Taxes
12Fair Value
13Financial and Other Derivative Instruments
17Leases
20Retirement Benefits and Trusteed Assets
21Stock-Based Compensation
v3.22.0.1
Dispositions and Impairments (Tables)
 12 Months Ended
Dec. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]  
Disposal Groups, Including Discontinued Operations
The table below reflects the financial results of DT Midstream that have been reclassified from continuing operations and included in discontinued operations within the Consolidated Statements of Operations. These results include the impact of tax-related adjustments and all transaction costs related to the separation. General corporate overhead costs have been excluded and no portion of corporate interest costs were allocated to discontinued operations.
Year Ended December 31,
202120202019
Operating Revenues — Non-utility operations$405 $754 $501 
Operating Expenses
Cost of gas and other — non-utility15 21 18 
Operation and maintenance(a)
123 138 103 
Depreciation and amortization82 151 94 
Taxes other than income13 15 8 
Asset (gains) losses and impairments, net17 (2)1 
250 323 224 
Operating Income155 431 277 
Other (Income) and Deductions
Interest expense50 113 73 
Interest income(4)(9)(8)
Other income(62)(129)(100)
Other expenses— — 1 
(16)(25)(34)
Income from Discontinued Operations Before Income Taxes171 456 311 
Income Tax Expense54 130 81 
Net Income from Discontinued Operations, Net of Taxes117 326 230 
Less: Net Income Attributable to Noncontrolling Interests6 12 16 
Net Income from Discontinued Operations$111 $314 $214 
_______________________________________
(a)Includes separation transaction costs of $59 million and $8 million for the years ended December 31, 2021 and 2020, respectively, for various legal, accounting and other professional services fees.
The table below reflects the major assets and liabilities that were transferred to DT Midstream and presented as discontinued operations in the Consolidated Statements of Financial Position as of December 31, 2020.
December 31, 2020
(In millions)
Total Assets of Discontinued Operations
Cash$42 
Accounts receivable126 
Inventories8 
Other44 
Current assets of DT Midstream220 
Less: Previously affiliated amounts eliminated at DTE Energy3 
Current assets of discontinued operations for DTE Energy217 
Investments in equity method investees1,691 
Net property, plant, and equipment3,470 
Goodwill473 
Intangible assets2,140 
Notes receivable19 
Operating lease right-of-use assets45 
Other21 
Noncurrent assets of discontinued operations for DTE Energy7,859 
Total Assets of Discontinued Operations for DTE Energy$8,076 
Total Liabilities of Discontinued Operations
Accounts payable$39 
Operating lease liabilities17 
Short-term borrowings due to DTE Energy2,913 
Other53 
Current liabilities of DT Midstream3,022 
Less: Previously affiliated amounts eliminated at DTE Energy2,923 
Current liabilities of discontinued operations for DTE Energy99 
Deferred income taxes753 
Asset retirement obligations10 
Operating lease liabilities28 
Other45 
Noncurrent liabilities of discontinued operations for DTE Energy836 
Total Liabilities of Discontinued Operations for DTE Energy$935 
The following table is a summary of significant non-cash items, capital expenditures, and significant financing activities of discontinued operations included in DTE Energy's Consolidated Statements of Cash Flows:
Year Ended December 31,
202120202019
(In millions)
Operating Activities
Depreciation and amortization$82 $151 $94 
Deferred income taxes53 125 78 
Equity earnings of equity method investees(59)(106)(97)
Asset (gains) losses and impairments, net19 (2)1 
Investing Activities
Plant and equipment expenditures — non-utility$(60)$(517)$(214)
Acquisitions related to business combinations, net of cash acquired— — (2,296)
Financing Activities
Purchase of noncontrolling interest$— $— $(297)
Acquisition related deferred payment, excluding accretion— (380)— 
v3.22.0.1
Revenue (Tables)
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue
The following is a summary of revenues disaggregated by segment for DTE Energy:
202120202019
(In millions)
Electric(a)
Residential$2,926 $2,825 $2,427 
Commercial1,908 1,739 1,795 
Industrial628 592 659 
Other(b)
359 364 348 
Total Electric operating revenues$5,821 $5,520 $5,229 
Gas
Gas sales$1,058 $971 $1,043 
End User Transportation233 218 219 
Intermediate Transportation82 79 78 
Other(b)
180 146 142 
Total Gas operating revenues$1,553 $1,414 $1,482 
Other segment operating revenues
DTE Vantage$1,482 $1,224 $1,560 
Energy Trading$6,831 $3,863 $4,610 
_______________________________________
(a)Revenues generally represent those of DTE Electric, except $12 million, $14 million, and $5 million of Other revenues related to DTE Sustainable Generation for the years ended December 31, 2021, 2020, and 2019, respectively.
(b)Includes revenue adjustments related to various regulatory mechanisms.
Revenues included the following which were outside the scope of Topic 606:
202120202019
(In millions)
Electric — Alternative Revenue Programs$36 $26 $22 
Electric — Other revenues19 22 19 
Gas — Alternative Revenue Programs10 10 8 
Gas — Other revenues6 8 7 
DTE Vantage — Leases103 99 121 
Energy Trading — Derivatives5,603 2,690 3,415 
Summary of Deferred Revenue Activity
The following is a summary of deferred revenue activity:
DTE Energy
(In millions)
Beginning Balance, January 1, 2021(a)
$65 
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period72 
Revenue recognized that was included in the deferred revenue balance at the beginning of the period(59)
Ending Balance, December 31, 2021$78 
_______________________________________
(a)Excludes $22 million of deferred revenue related to the discontinued operations of DT Midstream. Prospective activity includes only the continuing operations of DTE Energy.
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)
2022$75 
20231 
20241 
2025— 
2026— 
2027 and thereafter1 
$78 
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)
2022$292 $8 
2023285 8 
2024171 8 
202591 — 
202659 — 
2027 and thereafter364 — 
$1,262 $24 
v3.22.0.1
Property, Plant, and Equipment (Tables)
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
PP&E by Classification, Summary of Depreciation and Amortization
The following is a summary of Property, plant, and equipment by classification as of December 31:
20212020
Property, plant, and equipment(In millions)
DTE Electric
Zero carbon generation
Nuclear$3,394 $3,295 
Renewables2,522 1,817 
Fossil and other generation8,640 8,031 
Distribution11,414 10,354 
Other2,879 2,674 
Total DTE Electric28,849 26,171 
DTE Gas
Distribution4,900 4,517 
Storage593 576 
Transmission and other1,415 1,341 
Total DTE Gas6,908 6,434 
DTE Vantage1,118 1,194 
Other208 217 
Total DTE Energy$37,083 $34,016 
Accumulated depreciation and amortization
DTE Electric
Zero carbon generation
Nuclear$(413)$(373)
Renewables(357)(295)
Fossil and other generation(3,214)(3,014)
Distribution(2,842)(2,686)
Other(850)(682)
Total DTE Electric(7,676)(7,050)
DTE Gas
Distribution(1,265)(1,215)
Storage(154)(146)
Transmission and other(426)(403)
Total DTE Gas(1,845)(1,764)
DTE Vantage(545)(619)
Other(73)(84)
Total DTE Energy$(10,139)$(9,517)
Net DTE Energy Property, plant, and equipment$26,944 $24,499 
Net DTE Electric Property, plant, and equipment$21,173 $19,121 
The following is a summary of Depreciation and amortization expense for DTE Energy:
202120202019
(In millions)
Property, plant, and equipment$1,095 $1,025 $927 
Regulatory assets and liabilities259 244 227 
Intangible assets16 16 9 
Other7 7 6 
$1,377 $1,292 $1,169 
The following is a summary of Depreciation and amortization expense for DTE Electric:
202120202019
(In millions)
Property, plant, and equipment$890 $831 $748 
Regulatory assets and liabilities214 207 193 
Other5 5 5 
$1,109 $1,043 $946 
Schedule of AFUDC and Capitalized Interest Rates
The AFUDC and capitalized interest rates were as follows for the years ended December 31:
202120202019
DTE Electric AFUDC5.46 %5.47 %5.43 %
DTE Gas AFUDC5.55 %5.56 %5.56 %
Non-regulated businesses capitalized interest3.30 %3.90 %4.00 %
Schedule of AFUDC and Interest Capitalized
The following is a summary of AFUDC and interest capitalized for the years ended December 31:
202120202019
DTE Energy(In millions)
Allowance for debt funds used during construction and interest capitalized$12 $11 $14 
Allowance for equity funds used during construction27 25 24 
Total$39 $36 $38 
202120202019
DTE Electric(In millions)
Allowance for debt funds used during construction$11 $10 $10 
Allowance for equity funds used during construction25 23 22 
Total$36 $33 $32 
Schedule of Utility Property, Plant, and Equipment The average estimated useful life for each major class of utility Property, plant, and equipment as of December 31, 2021 follows:
Estimated Useful Lives in Years
UtilityGenerationDistributionStorage
DTE Electric3438N/A
DTE GasN/A4958
Schedule of Capitalized Software
The following balances for capitalized software relate to DTE Energy:
Year Ended December 31,
202120202019
(In millions)
Amortization expense of capitalized software$145 $128 $122 
Gross carrying value of capitalized software$920 $863 
Accumulated amortization of capitalized software$493 $430 
The following balances for capitalized software relate to DTE Electric:
Year Ended December 31,
202120202019
(In millions)
Amortization expense of capitalized software$132 $118 $112 
Gross carrying value of capitalized software$826 $756 
Accumulated amortization of capitalized software$439 $363 
v3.22.0.1
Jointly-Owned Utility Plant (Tables)
 12 Months Ended
Dec. 31, 2021
Jointly Owned Utility Plant, Net Ownership Amount [Abstract]  
Schedule of Jointly-Owned Utility Plants
DTE Electric's ownership information of the two utility plants as of December 31, 2021 was as follows:
Belle RiverLudington
Hydroelectric
Pumped Storage
In-service date1984-19851973
Total plant capacity1,270 MW2,220 MW
Ownership interest81%49%
Investment in Property, plant, and equipment (in millions)$1,952 $618 
Accumulated depreciation (in millions)$1,007 $128 
v3.22.0.1
Asset Retirement Obligations (Tables)
 12 Months Ended
Dec. 31, 2021
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Change in Asset Retirement Obligations
Changes to asset retirement obligations for 2021, 2020, and 2019 were as follows:
202120202019
DTE Energy(In millions)
Asset retirement obligations at January 1$2,829 $2,656 $2,463 
Accretion167 156 148 
Liabilities incurred28 24 11 
Liabilities settled(30)(13)(17)
Revision in estimated cash flows168 6 51 
Asset retirement obligations at December 31$3,162 $2,829 $2,656 
202120202019
DTE Electric(In millions)
Asset retirement obligations at January 1$2,607 $2,447 $2,271 
Accretion155 145 138 
Liabilities incurred29 18 1 
Liabilities settled(27)(8)(14)
Revision in estimated cash flows168 5 51 
Asset retirement obligations at December 31$2,932 $2,607 $2,447 
v3.22.0.1
Regulatory Matters (Tables)
 12 Months Ended
Dec. 31, 2021
Regulatory Assets and Liabilities Disclosure [Abstract]  
Schedule of Regulatory Assets
The following are balances and a brief description of the Registrants' Regulatory assets and liabilities at December 31:
DTE EnergyDTE Electric
2021202020212020
Assets(In millions)
Recoverable pension and other postretirement costs
Pension$1,372 $1,938 $1,056 $1,477 
Other postretirement costs53 165 27 108 
Recoverable undepreciated costs on retiring plants667 664 667 664 
Fermi 2 asset retirement obligation613 645 613 645 
Enhanced Tree Trimming Program deferred costs189 119 189 119 
Recoverable Michigan income taxes163 176 133 142 
Accrued PSCR/GCR revenue160 100 142 100 
Energy Waste Reduction incentive79 62 63 49 
Recoverable income taxes related to AFUDC equity68 64 61 54 
Deferred environmental costs51 57 — — 
Unamortized loss on reacquired debt51 55 38 41 
Customer360 deferred costs46 51 46 51 
Nuclear Performance Evaluation and Review Committee Tracker39 55 39 55 
Non-service pension and other postretirement costs25 21 — — 
Energy Waste Reduction20 19 — — 
Other recoverable income taxes16 19 16 19 
Transitional Reconciliation Mechanism8 11 8 11 
Other57 33 38 28 
3,677 4,254 3,136 3,563 
Less amount included in Current Assets(195)(129)(168)(123)
$3,482 $4,125 $2,968 $3,440 
Schedule of Regulatory Liabilities
DTE EnergyDTE Electric
2021202020212020
Liabilities(In millions)
Refundable federal income taxes$2,117 $2,255 $1,729 $1,827 
Removal costs liability679 831 283 410 
Negative other postretirement offset150 122 106 86 
Non-service pension and other postretirement costs110 78 54 36 
Incremental tree trim surge90 — 90 — 
COVID-19 voluntary refund30 30 30 30 
Energy Waste Reduction27 15 27 15 
Renewable energy13 21 13 21 
Other46 50 43 25 
3,262 3,402 2,375 2,450 
Less amount included in Current Liabilities(156)(39)(154)(18)
$3,106 $3,363 $2,221 $2,432 
v3.22.0.1
Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2021
Income Tax Disclosure [Abstract]  
Schedule of Effective Income Tax Rate Reconciliation
The Registrants' total Income Tax Expense varied from the statutory federal income tax rate for the following reasons:
202120202019
DTE Energy(In millions)
Income Before Income Taxes$656 $1,082 $1,013 
Income tax expense at 21% statutory rate$138 $227 $213 
Production tax credits(138)(121)(128)
TCJA regulatory liability amortization(103)(76)(38)
State deferred tax remeasurement due to separation of DT Midstream, net of federal benefit(85)— — 
Investment tax credits(3)(4)(4)
Net operating loss carryback— (34)— 
Enactment of West Virginia income tax legislation, net of federal benefit8 — — 
Deferred intercompany gain9 — — 
Valuation allowance on charitable contribution carryforwards18 3 6 
State and local income taxes, excluding items above, net of federal benefit30 47 29 
Other, net(4)(5)(7)
Income Tax Expense (Benefit)$(130)$37 $71 
Effective income tax rate(19.9)%3.4 %7.0 %
202120202019
DTE Electric(In millions)
Income Before Income Taxes$970 $887 $854 
Income tax expense at 21% statutory rate$204 $186 $179 
TCJA regulatory liability amortization(73)(62)(35)
Production tax credits(70)(55)(45)
Investment tax credits(3)(4)(4)
State and local income taxes, excluding items above, net of federal benefit54 50 49 
Other, net(8)(6)(6)
Income Tax Expense$104 $109 $138 
Effective income tax rate10.7 %12.3 %16.2 %
Schedule of Components of Income Tax Expense (Benefit)
Components of the Registrants' Income Tax Expense were as follows:
202120202019
DTE Energy(In millions)
Current income tax expense (benefit)
Federal$(33)$(249)$(183)
State and other income tax(12)4 3 
Total current income taxes(45)(245)(180)
Deferred income tax expense (benefit)
Federal(42)227 218 
State and other income tax(43)55 33 
Total deferred income taxes(85)282 251 
$(130)$37 $71 
202120202019
DTE Electric(In millions)
Current income tax expense (benefit)
Federal$(11)$15 $25 
State and other income tax(7)5 16 
Total current income taxes(18)20 41 
Deferred income tax expense
Federal47 30 51 
State and other income tax75 59 46 
Total deferred income taxes122 89 97 
$104 $109 $138 
Schedule of Deferred Tax Assets and Liabilities
The Registrants' deferred tax assets (liabilities) were comprised of the following at December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Property, plant, and equipment$(3,970)$(3,691)$(3,428)$(3,099)
Regulatory assets and liabilities(117)(102)(64)(53)
Tax credit carry-forwards1,260 1,144 379 278 
Pension and benefits310 310 282 264 
Federal net operating loss carry-forward199 109 5 — 
State and local net operating loss carry-forwards73 36 15 — 
Investments in equity method investees58 51 (1)— 
Other75 115 71 85 
(2,112)(2,028)(2,741)(2,525)
Less: Valuation allowance(51)(41)— — 
Long-term deferred income tax liabilities$(2,163)$(2,069)$(2,741)$(2,525)
Deferred income tax assets$2,224 $2,050 $988 $883 
Deferred income tax liabilities(4,387)(4,119)(3,729)(3,408)
$(2,163)$(2,069)$(2,741)$(2,525)
Schedule of Unrecognized Tax Benefits Roll Forward
A reconciliation of the beginning and ending amount of unrecognized tax benefits for the Registrants is as follows:
202120202019
DTE Energy(In millions)
Balance at January 1$10 $10 $10 
Additions for tax positions of prior years— — — 
Balance at December 31$10 $10 $10 
202120202019
DTE Electric(In millions)
Balance at January 1$13 $13 $13 
Additions for tax positions of prior years— — — 
Balance at December 31$13 $13 $13 
v3.22.0.1
Earnings Per Share (Tables)
 12 Months Ended
Dec. 31, 2021
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 for the years ended December 31:
202120202019
(In millions, except per share amounts)
Basic Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations$796 $1,054 $955 
Less: Allocation of earnings to net restricted stock awards(2)(2)(2)
$794 $1,052 $953 
Net Income Attributable to DTE Energy Company — discontinued operations111 314 214 
Net income available to common shareholders — basic$905 $1,366 $1,167 
Average number of common shares outstanding — basic193 193 185 
Income from continuing operations$4.11 $5.46 $5.16 
Income from discontinued operations0.57 1.63 1.16 
Basic Earnings per Common Share$4.68 $7.09 $6.32 
Diluted Earnings per Share
Net Income Attributable to DTE Energy Company — continuing operations$796 $1,054 $955 
Less: Allocation of earnings to net restricted stock awards(2)(2)(2)
$794 $1,052 $953 
Net Income Attributable to DTE Energy Company — discontinued operations111 314 214 
Net income available to common shareholders — diluted$905 $1,366 $1,167 
Average number of common shares outstanding — basic193 193 185 
    Average dilutive equity units and performance share awards1 — — 
Average number of common shares outstanding — diluted194 193 185 
Income from continuing operations$4.10 $5.45 $5.15 
Income from discontinued operations0.57 1.63 1.16 
Diluted Earnings per Common Share(a)
$4.67 $7.08 $6.31 
_______________________________________
(a)Equity units excluded from the calculation of diluted EPS were approximately 11.5 million for the year ended December 31, 2021 and 10.3 million for the years ended December 31, 2020 and 2019, respectively, as the dilutive stock price threshold was not met. For more information regarding equity units, see Note 14 to the Consolidated Financial Statements, "Long-Term Debt."
v3.22.0.1
Fair Value (Tables)
 12 Months Ended
Dec. 31, 2021
Fair Value Disclosures [Abstract]  
Assets and Liabilities 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:
December 31, 2021December 31, 2020
Level 1Level 2Level 3
Other
(a)
Netting
(b)
Net BalanceLevel 1Level 2Level 3
Other
(a)
Netting
(b)
Net Balance
(In millions)
Assets
Cash equivalents(c)
$4 $— $— $— $— $4 $438 $— $— $— $— $438 
Nuclear decommissioning trusts
Equity securities917 — — 190 — 1,107 947 — — 222 — 1,169 
Fixed income securities124 418 — 102 — 644 102 371 — 82 — 555 
Private equity and other— — — 205 — 205 — — — 104 — 104 
Hedge funds and similar investments58 18 — — — 76 — — — — — — 
Cash equivalents39 — — — — 39 27 — — — — 27 
Other investments(d)
Equity securities68 — — — — 68 55 — — — — 55 
Fixed income securities7 — — — — 7 8 — — — — 8 
Cash equivalents86 — — — — 86 97 — — — — 97 
Derivative assets
Commodity contracts(e)
Natural gas273 115 66 — (394)60 99 74 60 — (156)77 
Electricity— 500 143 — (441)202 — 128 52 — (120)60 
Environmental & Other— 285 9 — (285)9 — 150 4 — (135)19 
Total derivative assets273 900 218 — (1,120)271 99 352 116 — (411)156 
Total$1,576 $1,336 $218 $497 $(1,120)$2,507 $1,773 $723 $116 $408 $(411)$2,609 
Liabilities
Derivative liabilities
Commodity contracts(e)
Natural gas$(177)$(172)$(245)$— $347 $(247)$(88)$(59)$(76)$— $151 $(72)
Electricity— (434)(188)— 443 (179)— (126)(42)— 125 (43)
Environmental & Other— (288)— — 288 — — (137)— — 129 (8)
Foreign currency exchange contracts— (4)— — — (4)— (5)— — — (5)
Total$(177)$(898)$(433)$— $1,078 $(430)$(88)$(327)$(118)$— $405 $(128)
Net Assets (Liabilities) at end of period$1,399 $438 $(215)$497 $(42)$2,077 $1,685 $396 $(2)$408 $(6)$2,481 
Assets
Current$227 $646 $166 $— $(854)$185 $532 $260 $92 $— $(330)$554 
Noncurrent1,349 690 52 497 (266)2,322 1,241 463 24 408 (81)2,055 
Total Assets$1,576 $1,336 $218 $497 $(1,120)$2,507 $1,773 $723 $116 $408 $(411)$2,609 
Liabilities
Current$(168)$(609)$(260)$— $799 $(238)$(84)$(223)$(79)$— $318 $(68)
Noncurrent(9)(289)(173)— 279 (192)(4)(104)(39)— 87 (60)
Total Liabilities$(177)$(898)$(433)$— $1,078 $(430)$(88)$(327)$(118)$— $405 $(128)
Net Assets (Liabilities) at end of period$1,399 $438 $(215)$497 $(42)$2,077 $1,685 $396 $(2)$408 $(6)$2,481 
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
(b)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.
(c)Amounts consisted of $1 million and $2 million of cash equivalents included in Restricted cash on DTE Energy's Consolidated Statements of Financial Position at December 31, 2021 and December 31, 2020, respectively. All other amounts are included in Cash and cash equivalents on the Consolidated Statements of Financial Position.
(d)Excludes cash surrender value of life insurance investments.
(e)For contracts with a clearing agent, DTE Energy nets all activity across commodities. This can result in some individual commodities having a contra balance.
The following table presents assets for DTE Electric measured and recorded at fair value on a recurring basis as of:
December 31, 2021December 31, 2020
Level 1Level 2Level 3
Other(a)
Net Balance Level 1Level 2Level 3
Other(a)
Net Balance
(In millions)
Assets
Cash equivalents$— $— $— $— $— $4 $— $— $— $4 
Nuclear decommissioning trusts
Equity securities917 — — 190 1,107 947 — — 222 1,169 
Fixed income securities124 418 — 102 644 102 371 — 82 555 
Private equity and other— — — 205 205 — — — 104 104 
Hedge funds and similar investments58 18 — — 76 — — — — — 
Cash equivalents39 — — — 39 27 — — — 27 
Other investments
Equity securities20 — — — 20 16 — — — 16 
Fixed income securities— — — — — — — — — — 
Cash equivalents11 — — — 11 11 — — — 11 
Derivative assets — FTRs— — 9 — 9 — — 4 — 4 
Total$1,169 $436 $9 $497 $2,111 $1,107 $371 $4 $408 $1,890 
Assets
Current$— $— $9 $— $9 $4 $— $4 $— $8 
Noncurrent1,169 436 — 497 2,102 1,103 371 — 408 1,882 
Total Assets$1,169 $436 $9 $497 $2,111 $1,107 $371 $4 $408 $1,890 
_______________________________________
(a)Amounts represent assets valued at NAV as a practical expedient for fair value.
Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis
The following table presents the fair value reconciliation of Level 3 assets and liabilities measured at fair value on a recurring basis for DTE Energy:
Year Ended December 31, 2021Year Ended December 31, 2020
Natural GasElectricityOtherTotalNatural GasElectricityOtherTotal
(In millions)
Net Assets (Liabilities) as of January 1$(16)$10 $4 $(2)$(15)$16 $3 $4 
Transfers from Level 3 into Level 2— — — — (2)— — (2)
Total gains (losses)
Included in earnings(a)
(343)54 — (289)(75)113 (7)31 
Recorded in Regulatory liabilities— — 19 19 — — 20 20 
Purchases, issuances, and settlements:
Settlements180 (109)(14)57 76 (119)(12)(55)
Net Assets (Liabilities) as of December 31$(179)$(45)$9 $(215)$(16)$10 $4 $(2)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31(a)
$(208)$4 $(72)$(276)$(4)$70 $(70)$(4)
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31$— $— $9 $9 $— $— $4 $4 
_______________________________________
(a)Amounts are reflected in Operating Revenues — Non-utility operations and Fuel, purchased power, gas, and other — 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:
Year Ended December 31,
20212020
(In millions)
Net Assets as of January 1$4 $3 
Total gains recorded in Regulatory liabilities19 20 
Purchases, issuances, and settlements:
Settlements(14)(19)
Net Assets as of December 31$9 $4 
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31$9 $4 
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:
December 31, 2021
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$66 $(245)Discounted Cash FlowForward basis price (per MMBtu)$(1.36)—$3.82 /MMBtu$(0.04)/MMBtu
Electricity$143 $(188)Discounted Cash FlowForward basis price (per MWh)$(12)—$7 /MWh$(2)/MWh
December 31, 2020
Commodity ContractsDerivative AssetsDerivative LiabilitiesValuation TechniquesUnobservable InputRangeWeighted Average
(In millions)
Natural Gas$60 $(76)Discounted Cash FlowForward basis price (per MMBtu)$(0.86)—$2.50 /MMBtu$(0.07)/MMBtu
Electricity$52 $(42)Discounted Cash FlowForward basis price (per MWh)$(9)—$6 /MWh$— /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:
December 31, 2021December 31, 2020
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable(a), excluding lessor finance leases
$150 $— $— $167 $141 $— $— $141 
Short-term borrowings$758 $— $758 $— $38 $— $38 $— 
Notes payable(b)
$27 $— $— $27 $19 $— $— $19 
Long-term debt(c)
$17,378 $2,284 $15,425 $1,207 $19,439 $2,547 $18,230 $1,397 
_______________________________________
(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 and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs.
The following table presents the carrying amount and fair value of financial instruments for DTE Electric:
December 31, 2021December 31, 2020
CarryingFair ValueCarryingFair Value
AmountLevel 1Level 2Level 3AmountLevel 1Level 2Level 3
(In millions)
Notes receivable — Other(a)
$17 $— $— $17 $16 $— $— $16 
Short-term borrowings — affiliates$53 $— $— $53 $101 $— $— $101 
Short-term borrowings — other$153 $— $153 $— $— $— $— $— 
Notes payable(b)
$27 $— $— $27 $17 $— $— $17 
Long-term debt(c)
$8,907 $— $9,898 $150 $8,236 $— $9,579 $379 
_______________________________________
(a)Included in Current 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 and excludes finance lease obligations. Carrying value also includes unamortized debt discounts and issuance costs.
Fair Value of Nuclear Decommissioning Trust Fund Assets
The following table summarizes DTE Electric's fair value of the nuclear decommissioning trust fund assets:
December 31,
20212020
(In millions)
Fermi 2$2,051 $1,841 
Fermi 13 3 
Low-level radioactive waste17 11 
$2,071 $1,855 
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:
Year Ended December 31,
202120202019
(In millions)
Realized gains$95 $192 $56 
Realized losses$(12)$(111)$(31)
Proceeds from sale of securities$1,047 $2,350 $788 
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:
December 31, 2021December 31, 2020
Fair
Value		Unrealized
Gains		Unrealized LossesFair
Value		Unrealized
Gains		Unrealized Losses
(In millions)
Equity securities$1,107 $546 $(9)$1,169 $468 $(6)
Fixed income securities644 23 (6)555 22 (1)
Private equity and other205 58 (8)104 11 — 
Hedge funds and similar investments76 1 (2)— — — 
Cash equivalents39 — — 27 — — 
$2,071 $628 $(25)$1,855 $501 $(7)
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:
December 31, 2021
(In millions)
Due within one year$20 
Due after one through five years135 
Due after five through ten years109 
Due after ten years278 
$542 
Summary of Gains (Losses) Related to the Trust The following table summarizes the Registrants' gains (losses) related to the trust:
Year Ended December 31,
202120202019
(In millions)
Gains (losses) related to equity securities$7 $(1)$27 
Gains (losses) related to fixed income securities— (2)10 
$7 $(3)$37 
v3.22.0.1
Financial and Other Derivative Instruments (Tables)
 12 Months Ended
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Fair Value of Derivative Instruments
The following table presents the fair value of derivative instruments for DTE Energy:
December 31, 2021December 31, 2020
Derivative
Assets		Derivative
Liabilities		Derivative
Assets		Derivative
Liabilities
(In millions)
Derivatives designated as hedging instruments
Foreign currency exchange contracts$— $(4)$— $(4)
Derivatives not designated as hedging instruments
Commodity contracts
Natural gas$454 $(594)$233 $(223)
Electricity643 (622)180 (168)
Environmental & Other294 (288)154 (137)
Foreign currency exchange contracts— — — (1)
Total derivatives not designated as hedging instruments$1,391 $(1,504)$567 $(529)
Current$1,035 $(1,037)$446 $(386)
Noncurrent356 (471)121 (147)
Total derivatives$1,391 $(1,508)$567 $(533)
Offsetting Assets
The following table presents net cash collateral offsetting arrangements for DTE Energy:
December 31,
20212020
(In millions)
Cash collateral netted against Derivative assets$(90)$(12)
Cash collateral netted against Derivative liabilities48 6 
Cash collateral recorded in Accounts receivable(a)
55 14 
Cash collateral recorded in Accounts payable(a)
(21)(1)
Total net cash collateral posted (received)$(8)$7 
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
December 31, 2021December 31, 2020
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$454 $(394)$60 $233 $(156)$77 
Electricity643 (441)202 180 (120)60 
Environmental & Other294 (285)9 154 (135)19 
Total derivative assets$1,391 $(1,120)$271 $567 $(411)$156 
Derivative liabilities
Commodity contracts
Natural gas$(594)$347 $(247)$(223)$151 $(72)
Electricity(622)443 (179)(168)125 (43)
Environmental & Other(288)288 — (137)129 (8)
Foreign currency exchange contracts(4)— (4)(5)— (5)
Total derivative liabilities$(1,508)$1,078 $(430)$(533)$405 $(128)
Offsetting Liabilities
The following table presents net cash collateral offsetting arrangements for DTE Energy:
December 31,
20212020
(In millions)
Cash collateral netted against Derivative assets$(90)$(12)
Cash collateral netted against Derivative liabilities48 6 
Cash collateral recorded in Accounts receivable(a)
55 14 
Cash collateral recorded in Accounts payable(a)
(21)(1)
Total net cash collateral posted (received)$(8)$7 
_______________________________________
(a)Amounts are recorded net by counterparty.
The following table presents the netting offsets of Derivative assets and liabilities for DTE Energy:
December 31, 2021December 31, 2020
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$454 $(394)$60 $233 $(156)$77 
Electricity643 (441)202 180 (120)60 
Environmental & Other294 (285)9 154 (135)19 
Total derivative assets$1,391 $(1,120)$271 $567 $(411)$156 
Derivative liabilities
Commodity contracts
Natural gas$(594)$347 $(247)$(223)$151 $(72)
Electricity(622)443 (179)(168)125 (43)
Environmental & Other(288)288 — (137)129 (8)
Foreign currency exchange contracts(4)— (4)(5)— (5)
Total derivative liabilities$(1,508)$1,078 $(430)$(533)$405 $(128)
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:
December 31, 2021December 31, 2020
Derivative AssetsDerivative LiabilitiesDerivative AssetsDerivative Liabilities
CurrentNoncurrentCurrentNoncurrentCurrentNoncurrentCurrentNoncurrent
(In millions)
Total fair value of derivatives$1,035 $356 $(1,037)$(471)$446 $121 $(386)$(147)
Counterparty netting(791)(239)791 239 (318)(81)318 81 
Collateral adjustment(63)(27)8 40 (12)— — 6 
Total derivatives as reported$181 $90 $(238)$(192)$116 $40 $(68)$(60)
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 Years Ended December 31,
202120202019
(In millions)
Commodity contracts
Natural gasOperating Revenues — Non-utility operations $(224)$(70)$44 
Natural gasFuel, purchased power, gas, and other — non-utility(89)20 (5)
ElectricityOperating Revenues — Non-utility operations 169 91 44 
Environmental & OtherOperating Revenues — Non-utility operations (40)(118)(26)
Foreign currency exchange contractsOperating Revenues — Non-utility operations — (6)(2)
Total$(184)$(83)$55 
Volume of Commodity Contracts
The following represents the cumulative gross volume of DTE Energy's derivative contracts outstanding as of December 31, 2021:
CommodityNumber of Units
Natural gas (MMBtu)2,139,606,569 
Electricity (MWh)32,140,743 
Foreign currency exchange ($ CAD)116,073,431 
Renewable Energy Certificates (MWh)7,711,766 
Carbon emissions (Metric Ton)1,142,009 
v3.22.0.1
Long-Term Debt (Tables)
 12 Months Ended
Dec. 31, 2021
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments
DTE Energy's long-term debt outstanding and weighted average interest rates of debt outstanding at December 31 were:
Interest Rate(a)
Maturity Date20212020
(In millions)
Mortgage bonds, notes, and other
DTE Energy Debt, Unsecured2.1%2022 — 2030$5,555 $8,175 
DTE Electric Debt, Principally Secured3.7%2022 — 20518,988 8,308 
DTE Gas Debt, Principally Secured3.9%2023 — 20512,065 1,910 
16,608 18,393 
Unamortized debt discount(23)(25)
Unamortized debt issuance costs(90)(104)
Long-term debt due within one year(2,866)(462)
$13,629 $17,802 
Junior Subordinated Debentures
Subordinated Debentures4.8%2077 — 2081$910 $1,210 
Unamortized debt issuance costs(27)(35)
$883 $1,175 
_______________________________________
(a)Weighted average interest rate as of December 31, 2021.
DTE Electric's long-term debt outstanding and weighted average interest rates of debt outstanding at December 31 were:
Interest Rate(a)
Maturity Date20212020
(In millions)
Mortgage bonds, notes, and other
Long Term Debt, Principally Secured3.7%2022 — 2051$8,988 $8,308 
Unamortized debt discount(19)(16)
Unamortized debt issuance costs(62)(56)
Long-term debt due within one year(316)(462)
$8,591 $7,774 
_______________________________________
(a)Weighted average interest rate as of December 31, 2021.
Selected information about DTE Energy’s equity units is presented below:
Issuance DateUnits IssuedTotal Net ProceedsTotal Long-Term DebtRSN Annual Interest RateStock Purchase Contract Annual RateStock Purchase Settlement Date
Stock Purchase Contract Liability(a)
RSN Maturity Date
(In millions, except interest rates)
11/1/1926$1,265 $1,300 2.25%4.0%11/1/2022$150 11/1/2025
_______________________________________
(a)Payments of $50 million and $49 million were made in 2021 and 2020, respectively. The stock purchase contract liability was $51 million and $101 million as of December 31, 2021 and 2020, respectively, exclusive of interest.
Schedule of Issued Debt
In 2021, the following debt was issued:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricMarch
Mortgage bonds(a)
1.90%2028$575 
DTE ElectricMarch
Mortgage bonds(a)
3.25%2051425 
DT MidstreamJune
Senior notes(b)
4.125%20291,100 
DT MidstreamJune
Senior notes(b)
4.375%20311,000 
DT MidstreamJune
Term loan facility(b)
Variable20281,000 
DTE GasNovember
Mortgage bonds(c)
2.07%203160 
DTE GasNovember
Mortgage bonds(c)
2.85%205195 
DTE EnergyNovember
Junior subordinated debentures(d)
4.375%2081280 
$4,535 
_______________________________________
(a)Bonds were issued as Green Bonds and the proceeds will be used to finance qualified expenditures for solar and wind energy, payments under power purchase agreements for solar and wind energy, and energy optimization programs.
(b)Proceeds used for the repayment of short-term borrowings due to DTE Energy to facilitate the separation of DT Midstream, as well as a one-time special dividend provided to DTE Energy. The debt was transferred to DT Midstream upon its separation on July 1, 2021. Refer to Note 4 to the Consolidated Financial Statements, “Dispositions and Impairments,” for additional information and to the Debt Redemptions section below for DTE Energy's use of the proceeds received from DT Midstream.
(c)Proceeds used for the repayment of short-term borrowings and general corporate purposes, including capital expenditures.
(d)Proceeds used for the repayment of $280 million of DTE Energy's 2016 Series F 6.00% Junior Subordinated Debentures due 2076.
Schedule of Debt Redeemed
In 2021, the following debt was redeemed:
CompanyMonthTypeInterest RateMaturity DateAmount
(In millions)
DTE ElectricAprilMortgage bonds3.90%2021$250 
DTE ElectricMayMortgage bonds7.00%202133 
DTE EnergyJune
Junior subordinated debentures(a)
5.375%2076300 
DTE EnergyJulySenior notes3.30%2022300 
DTE EnergyJulySenior notes2.60%2022300 
DTE EnergyJulySenior notes3.70%2023600 
DTE EnergyJulySenior notes3.85%2023135 
DTE EnergyJulySenior notes3.50%2024350 
DTE EnergyJulySenior notes3.80%2027350 
DTE EnergyJulySenior notes3.40%202921 
DTE EnergyJulySenior notes6.375%2033191 
DTE EnergyAugustSenior notes3.85%2023165 
DTE EnergyAugustSenior notes6.375%2033209 
DTE ElectricAugustMortgage bonds6.90%202138 
DTE EnergyDecember
Junior subordinated debentures(a)
6.00%2076280 
$3,522 
_______________________________________
(a)Early redemptions and the write-off of unamortized issuance costs resulted in a total loss on extinguishment of debt of $17 million for the year ended December 31, 2021, including $8 million for the June redemption and $9 million for the December redemption.
Schedule of Maturities of Long-term Debt
The following table shows the Registrants' scheduled debt maturities, excluding any unamortized discount on debt:
202220232024202520262027 and ThereafterTotal
(In millions)
DTE Energy(a)
$2,866 $277 $1,075 $1,220 $777 $11,302 $17,517 
DTE Electric$316 $202 $400 $350 $177 $7,543 $8,988 
_______________________________________
(a)Amounts include DTE Electric's scheduled debt maturities.
Scheduled Interest Payments Related to Long-term Debt
The following table shows scheduled interest payments related to the Registrants' long-term debt:
202220232024202520262027 and ThereafterTotal
(In millions)
DTE Energy(a)
$575 $548 $529 $494 $450 $7,510 $10,106 
DTE Electric$330 $322 $305 $292 $284 $4,222 $5,755 
_______________________________________
(a)Amounts include DTE Electric's scheduled interest payments.
v3.22.0.1
Preferred and Preference Securities (Tables)
 12 Months Ended
Dec. 31, 2021
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]  
Schedule of Preferred and Preference Securities
As of December 31, 2021, the amount of authorized and unissued stock is as follows:
CompanyType of StockPar ValueShares Authorized
DTE EnergyPreferred$— 5,000,000 
DTE ElectricPreferred$100 6,747,484 
DTE ElectricPreference$1 30,000,000 
DTE GasPreferred$1 7,000,000 
DTE GasPreference$1 4,000,000 
v3.22.0.1
Short-Term Credit Arrangements and Borrowings (Tables)
 12 Months Ended
Dec. 31, 2021
Short-term Debt [Abstract]  
Schedule of Line of Credit Facilities
The availability under the facilities in place at December 31, 2021 is shown in the following table:
DTE EnergyDTE ElectricDTE GasTotal
(In millions)
Unsecured revolving credit facility, expiring April 2025(a)
$1,500 $500 $300 $2,300 
Unsecured term loan, expiring June 2022400 — — 400 
Unsecured Canadian revolving credit facility, expiring May 202387 — — 87 
Unsecured letter of credit facility, expiring February 2023150 — — 150 
Unsecured letter of credit facility, expiring July 202370 — — 70 
Unsecured letter of credit facility(b)
50 — — 50 
2,257 500 300 3,057 
Amounts outstanding at December 31, 2021
Revolver borrowings75 — — 75 
Commercial paper issuances320 153 210 683 
Letters of credit258 — — 258 
653 153 210 1,016 
Net availability at December 31, 2021$1,604 $347 $90 $2,041 
_______________________________________
(a)Total availability of $102 million expires in April 2024, including $67 million at DTE Energy, $22 million at DTE Electric, and $13 million at DTE Gas. All other availability expires in April 2025.
(b)Uncommitted letter of credit facility with automatic renewal provision for each July and therefore no expiration.
v3.22.0.1
Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Components of Lease Cost and Other Information Related to Leases
The following is a summary of the components of lease cost for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Operating lease cost$19 $21 $23 $14 $14 $17 
Finance lease cost:
Amortization of right-of-use assets7 5 4 6 4 4 
Interest of lease liabilities1 — — — — — 
Total finance lease cost8 5 4 6 4 4 
Variable lease cost9 10 10 — — — 
Short-term lease cost14 11 9 6 6 3 
$50 $47 $46 $26 $24 $24 
The following is a summary of other information related to leases for the years ended December 31:
DTE EnergyDTE Electric
202120202019202120202019
(In millions)
Supplemental Cash Flows Information
Cash paid for amounts included in the measurement of these liabilities:
Operating cash flows for finance leases$8 $3 $5 $7 $2 $5 
Operating cash flows for operating leases$19 $22 $22 $14 $14 $16 
Right-of-use assets obtained in exchange for lease obligations:
Operating leases$5 $2 $42 $1 $— $27 
Finance leases$3 $19 $8 $1 $14 $— 
Weighted Average Remaining Lease Term (Years)
Operating leases12.712.112.110.310.410.6
Finance leases7.87.69.12.13.12.0
Weighted Average Discount Rate
Operating leases3.6 %3.6 %3.5 %3.4 %3.3 %3.3 %
Finance leases2.2 %2.0 %3.1 %1.0 %1.0 %3.1 %
Schedule of Maturities of Operating Leases
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Schedule of Maturities of Finance Leases
The Registrants' future minimum lease payments under leases for remaining periods as of December 31, 2021 are as follows:
DTE EnergyDTE Electric
Operating LeasesFinance LeasesOperating LeasesFinance Leases
(In millions)
2022$16 $8 $12 $6 
202313 9 10 6 
202411 3 8 1 
20258 1 6 — 
20267 1 5 — 
2027 and thereafter56 8 27 — 
Total future minimum lease payments111 30 68 13 
Imputed interest(23)(3)(12)— 
Lease liabilities$88 $27 $56 $13 
Schedule of Finance Leases Reported on Consolidated Statement of Financial Position
Finance leases reported on the Consolidated Statements of Financial Position are as follows for the years ended December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Right-of-use assets, within Property, plant, and equipment, net$26 $29 $12 $16 
Current lease liabilities, within Current portion of long-term debt$8 $7 $6 $6 
Long-term lease liabilities$19 $24 $7 $13 
Schedule of Lease Income Associated with Operating Leases
DTE Energy’s lease income associated with operating leases, including the line items in which it was included on the Consolidated Statements of Operations, was as follows:
202120202019
(In millions)
Fixed payments$67 $57 $56 
Variable payments131 124 128 
$198 $181 $184 
Operating revenues$103 $99 $121 
Other income95 82 63 
$198 $181 $184 
Schedule of Minimum Future Rental Revenues under Operating Leases
DTE Energy’s minimum future rental revenues under operating leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$15 
202315 
202415 
202515 
202611 
2027 and thereafter51 
$122 
Schedule of Property under Operating Leases
The following is a summary of property under operating leases for DTE Energy as of December 31:
20212020
(In millions)
Gross property under operating leases$341 $389 
Accumulated amortization of property under operating leases$181 $191 
Components of Net Investment in Finance Leases
The components of DTE Energy’s net investment in finance leases for remaining periods as of December 31, 2021 are as follows:
DTE Energy
(In millions)
2022$23 
202322 
202422 
202521 
202621 
2027 and thereafter271 
Total minimum future lease receipts380 
Residual value of leased pipeline17 
Less unearned income198 
Net investment in finance lease199 
Less current portion6 
$193 
v3.22.0.1
Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Long-term Purchase Commitments The Registrants estimate the following commitments from 2022 through 2051 for DTE Energy, and 2022 through 2051 for DTE Electric, as detailed in the following tables:
202220232024202520262027 and ThereafterTotal
DTE Energy(In millions)
Long-term power purchase agreements(a)
$87 $92 $103 $103 $103 $986 $1,474 
Other purchase commitments(b)
3,203 1,704 1,174 482 357 980 7,900 
Total commitments$3,290 $1,796 $1,277 $585 $460 $1,966 $9,374 
202220232024202520262027 and ThereafterTotal
DTE Electric(In millions)
Long-term power purchase agreements(a)
$92 $97 $108 $108 $109 $1,006 $1,520 
Other purchase commitments(b)
365 402 431 197 118 275 1,788 
Total commitments$457 $499 $539 $305 $227 $1,281 $3,308 
_______________________________________
(a)The agreements represent the minimum obligations with suppliers for renewable energy and renewable energy credits under existing contract terms which expire from 2030 through 2035. DTE Electric's share of plant output ranges from 28% to 100%. Purchase commitments for DTE Electric include affiliate agreements with DTE Sustainable Generation that are eliminated in consolidation for DTE Energy.
(b)Excludes amounts associated with full requirements contracts where no stated minimum purchase volume is required.
v3.22.0.1
Retirement Benefits and Trusteed Assets (Tables)
 12 Months Ended
Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Defined Benefit Plans Disclosures
The table below represents the pension and other postretirement benefit plans of each Registrant at December 31, 2021:
Registrants
DTE EnergyDTE Electric
Qualified Pension Plans
DTE Energy Company Retirement PlanXX
DTE Gas Company Retirement Plan for Employees Covered by Collective Bargaining AgreementsX
Shenango Inc. Pension Plan(a)
X
Non-qualified Pension Plans
DTE Energy Company Supplemental Retirement Plan(b)
XX
DTE Energy Company Executive Supplemental Retirement Plan(b)
XX
DTE Energy Company Supplemental Severance Benefit PlanX
Other Postretirement Benefit Plans
The DTE Energy Company Comprehensive Non-Health Welfare PlanXX
The DTE Energy Company Comprehensive Retiree Group Health Care PlanXX
DTE Supplemental Retiree Benefit PlanXX
DTE Energy Company Retiree Reimbursement Arrangement PlanXX
_____________________________________
(a)Sponsored by Shenango, LLC
(b)Sponsored by DTE Energy Company
Pension Plan  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Defined Benefit Plans Disclosures
The following table reconciles the obligations, assets, and funded status of the plans as well as the amounts recognized as prepaid pension cost or pension liability in DTE Energy's Consolidated Statements of Financial Position at December 31:
DTE Energy
20212020
(In millions)
Accumulated benefit obligation, end of year$5,448 $5,843 
Change in projected benefit obligation
Projected benefit obligation, beginning of year$6,304 $5,810 
Service cost108 99 
Interest cost158 186 
Plan amendments4 — 
Actuarial (gain) loss(255)619 
Special termination benefits— 3 
Benefits paid(414)(353)
Settlements(48)(60)
Projected benefit obligation, end of year$5,857 $6,304 
Change in plan assets
Plan assets at fair value, beginning of year$5,497 $4,993 
Actual return on plan assets460 815 
Company contributions12 102 
Benefits paid(414)(353)
Settlements(48)(60)
Plan assets at fair value, end of year$5,507 $5,497 
Funded status$(350)$(807)
Amount recorded as:
Current liabilities$(11)$(10)
Noncurrent liabilities(339)(797)
$(350)$(807)
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial loss$126 $142 
Prior service cost1 3 
$127 $145 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$1,381 $1,949 
Prior service credit(9)(11)
$1,372 $1,938 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
The following table provides a summary of annual contributions to the qualified plans:
202120202019
(In millions)
DTE Energy$— $92 $150 
DTE Electric$— $60 $100 
Schedule of Net Benefit Costs
Net pension cost for DTE Energy includes the following components:
202120202019
(In millions)
Service cost$108 $99 $84 
Interest cost158 186 219 
Expected return on plan assets(339)(334)(325)
Amortization of:
Net actuarial loss196 171 131 
Prior service cost— 1 1 
Settlements16 25 2 
Net pension cost$139 $148 $112 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
20212020
(In millions)
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial (gain) loss$(376)$137 
Amortization of net actuarial loss(209)(193)
Prior service cost4 — 
Amortization of prior service cost(3)(1)
Total recognized in Regulatory assets and Other comprehensive income (loss)$(584)$(57)
Total recognized in net periodic pension cost, Regulatory assets, and Other comprehensive income (loss)$(445)$91 
Schedule of Expected Benefit Payments
At December 31, 2021, the benefits related to DTE Energy's qualified and non-qualified pension plans expected to be paid in each of the next five years and in the aggregate for the five fiscal years thereafter are as follows:
(In millions)
2022$346 
2023360 
2024341 
2025350 
2026346 
2027-20311,723 
Total$3,466 
Schedule of Assumptions Used
Assumptions used in determining the projected benefit obligation and net pension costs of DTE Energy are:
202120202019
Projected benefit obligation
Discount rate2.91%2.57%3.28%
Rate of compensation increase3.80%3.80%3.85%
Cash balance interest crediting rate2.40%2.00%3.30%
Net pension costs
Discount rate2.57%3.28%4.40%
Rate of compensation increase3.80%3.85%3.85%
Expected long-term rate of return on plan assets7.00%7.10%7.30%
Cash balance interest crediting rate2.00%3.30%3.70%
Schedule of Allocation of Plan Assets
Target allocations for DTE Energy's pension plan assets as of December 31, 2021 are listed below:
U.S. Large Capitalization (Cap) Equity Securities13 %
U.S. Small Cap and Mid Cap Equity Securities3 
Non-U.S. Equity Securities13 
Fixed Income Securities48 
Hedge Funds and Similar Investments11 
Private Equity and Other12 
100 %
The following tables provide the fair value measurement amounts for DTE Energy's pension plan assets at December 31, 2021 and 2020(a):
December 31, 2021December 31, 2020
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
DTE Energy asset category:(In millions)
Short-term Investments(c)
$112 $— $— $112 $92 $— $— $92 
Equity Securities
Domestic(d)
155 — 758 913 167 — 1,093 1,260 
International(e)
88 — 588 676 100 — 791 891 
Fixed Income Securities
Governmental(f)
943 83 — 1,026 459 95 — 554 
Corporate(g)
— 1,466 — 1,466 — 1,404 — 1,404 
Hedge Funds and Similar Investments(h)
139 63 365 567 238 61 411 710 
Private Equity and Other(i)
— — 747 747 — — 586 586 
DTE Energy Total$1,437 $1,612 $2,458 $5,507 $1,056 $1,560 $2,881 $5,497 
_______________________________________
(a)For a description of levels within the fair value hierarchy, see Note 12 to the Consolidated Financial Statements, "Fair Value."
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category are obtained from quoted prices in actively traded markets.
(d)This category represents portfolios of large, medium and small capitalization domestic equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(f)This category includes U.S. Treasuries, bonds, and other governmental debt. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services.
(g)This category primarily consists of corporate bonds from diversified industries, bank loans, and mortgage backed securities. Pricing for investments in this category is obtained from quotations from broker or pricing services.
(h)This category utilizes a diversified group of strategies that attempt to capture uncorrelated sources of return and includes publicly traded mutual funds, insurance-linked and asset-backed securities, commingled funds and limited partnership funds. Pricing for mutual funds in this category is obtained from quoted prices in actively traded markets. Pricing for insurance-linked and asset-backed securities is obtained from quotations. from broker or pricing services. Commingled funds and limited partnership funds are classified as NAV assets.
(i)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in private real estate and private debt. All investments in this category are classified as NAV assets.
Other postretirement benefit plan  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of Defined Benefit Plans Disclosures
The following table reconciles the obligations, assets, and funded status of the plans including amounts recorded as Accrued postretirement liability in the Registrants' Consolidated Statements of Financial Position at December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Change in accumulated postretirement benefit obligation
Accumulated postretirement benefit obligation, beginning of year$1,807 $1,751 $1,369 $1,337 
Service cost30 26 23 20 
Interest cost46 56 35 43 
Plan amendments1 — — — 
Actuarial (gain) loss(100)54 (73)31 
Benefits paid(82)(80)(61)(62)
Accumulated postretirement benefit obligation, end of year$1,702 $1,807 $1,293 $1,369 
Change in plan assets
Plan assets at fair value, beginning of year$1,960 $1,819 $1,320 $1,236 
Actual return on plan assets142 220 96 145 
Benefits paid(81)(79)(61)(61)
Plan assets at fair value, end of year$2,021 $1,960 $1,355 $1,320 
Funded status$319 $153 $62 $(49)
Amount recorded as:
Noncurrent assets$678 $561 $402 $335 
Current liabilities(1)(1)— — 
Noncurrent liabilities(358)(407)(340)(384)
$319 $153 $62 $(49)
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax
Net actuarial gain$(1)$(7)$— $— 
Amounts recognized in Regulatory assets(a)
Net actuarial loss$102 $234 $61 $156 
Prior service credit(49)(69)(34)(48)
$53 $165 $27 $108 
______________________________________
(a)See Note 9 to the Consolidated Financial Statements, "Regulatory Matters."
Schedule of Net Benefit Costs
Net other postretirement credit for DTE Energy includes the following components:
202120202019
(In millions)
Service cost$30 $26 $22 
Interest cost46 56 70 
Expected return on plan assets(129)(128)(96)
Amortization of:
Net actuarial loss13 16 12 
Prior service credit(19)(19)(9)
Net other postretirement credit$(59)$(49)$(1)
Net other postretirement credit for DTE Electric includes the following components:
202120202019
(In millions)
Service cost$23 $20 $16 
Interest cost35 43 53 
Expected return on plan assets(86)(87)(65)
Amortization of:
Net actuarial loss11 11 5 
Prior service credit(14)(14)(7)
Net other postretirement cost (credit)$(31)$(27)$2 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss)
20212020
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and Other comprehensive income (loss)
Net actuarial gain$(113)$(38)
Amortization of net actuarial loss(13)(16)
Prior service cost1 — 
Amortization of prior service credit19 19 
Total recognized in Regulatory assets and Other comprehensive income (loss)$(106)$(35)
Total recognized in net periodic benefit cost, Regulatory assets, and Other comprehensive income (loss)$(165)$(84)
20212020
(In millions)
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets
Net actuarial gain$(84)$(26)
Amortization of net actuarial loss(11)(11)
Amortization of prior service credit14 14 
Total recognized in Regulatory assets$(81)$(23)
Total recognized in net periodic benefit cost and Regulatory assets$(112)$(50)
Schedule of Expected Benefit Payments
At December 31, 2021, the benefits expected to be paid, including prescription drug benefits, in each of the next five years and in the aggregate for the five fiscal years thereafter for the Registrants are as follows:
DTE EnergyDTE Electric
(In millions)
2022$85 $64 
202389 68 
202491 69 
202594 71 
202695 72 
2027-2031493 375 
Total$947 $719 
Schedule of Assumptions Used
Assumptions used in determining the accumulated postretirement benefit obligation and net other postretirement benefit costs of the Registrants are:
202120202019
Accumulated postretirement benefit obligation
Discount rate2.91%2.58%3.29%
Health care trend rate pre- and post- 65
6.75 / 7.25%
6.75 / 7.25%
6.75 / 7.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203420332032
Other postretirement benefit costs
Discount rate2.58%3.29%4.40%
Expected long-term rate of return on plan assets6.70%7.20%7.30%
Health care trend rate pre- and post- 65
6.75 / 7.25%
6.75 / 7.25%
6.75 / 7.25%
Ultimate health care trend rate4.50%4.50%4.50%
Year in which ultimate reached pre- and post- 65203320322031
Schedule of Allocation of Plan Assets
Target allocations for the Registrants' other postretirement benefit plan assets as of December 31, 2021 are listed below:
U.S. Large Cap Equity Securities10 %
U.S. Small Cap and Mid Cap Equity Securities2 
Non-U.S. Equity Securities10 
Fixed Income Securities54 
Hedge Funds and Similar Investments10 
Private Equity and Other14 
100 %
The following tables provide the fair value measurement amounts for the Registrants' other postretirement benefit plan assets at December 31, 2021 and 2020(a):
December 31, 2021December 31, 2020
Level 1Level 2
Other(b)
TotalLevel 1Level 2
Other(b)
Total
(In millions)
DTE Energy asset category:
Short-term Investments(c)
$39 $— $— $39 $21 $— $— $21 
Equity Securities
Domestic(d)
27 — 199 226 51 — 200 251 
International(e)
27 — 141 168 23 — 178 201 
Fixed Income Securities
Governmental(f)
343 32 — 375 40 45 — 85 
Corporate(g)
— 355 271 626 — 477 379 856 
Hedge Funds and Similar Investments(h)
58 26 120 204 61 17 124 202 
Private Equity and Other(i)
— — 383 383 — — 344 344 
DTE Energy Total$494 $413 $1,114 $2,021 $196 $539 $1,225 $1,960 
DTE Electric asset category:
Short-term Investments(c)
$26 $— $— $26 $14 $— $— $14 
Equity Securities
Domestic(d)
18 — 132 150 33 — 131 164 
International(e)
18 — 93 111 16 — 117 133 
Fixed Income Securities
Governmental(f)
230 21 — 251 24 31 — 55 
Corporate(g)
— 235 187 422 — 321 263 584 
Hedge Funds and Similar Investments(h)
39 17 81 137 41 11 83 135 
Private Equity and Other(i)
— — 258 258 — — 235 235 
DTE Electric Total$331 $273 $751 $1,355 $128 $363 $829 $1,320 
_______________________________________
(a)For a description of levels within the fair value hierarchy see Note 12 to the Consolidated Financial Statements, "Fair Value."
(b)Amounts represent assets valued at NAV as a practical expedient for fair value.
(c)This category predominantly represents certain short-term fixed income securities and money market investments that are managed in separate accounts or commingled funds. Pricing for investments in this category are obtained from quoted prices in actively traded markets.
(d)This category represents portfolios of large, medium and small capitalization domestic equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(e)This category primarily consists of portfolios of non-U.S. developed and emerging market equities. Investments in this category include exchange-traded securities for which unadjusted quoted prices can be obtained and exchange-traded securities held in a commingled fund classified as NAV assets.
(f)This category includes U.S. Treasuries, bonds and other governmental debt. Pricing for investments in this category is obtained from quoted prices in actively traded markets and quotations from broker or pricing services.
(g)This category primarily consists of corporate bonds from diversified industries, bank loans, and mortgage backed securities. Pricing for investments in this category is obtained from quotations from broker or pricing services. Non-exchange traded securities and exchange-traded securities held in commingled funds are classified as NAV assets.
(h)This category utilizes a diversified group of strategies that attempt to capture uncorrelated sources of income and includes publicly traded mutual funds, insurance-linked and asset-backed securities, commingled funds and limited partnership funds. Pricing for mutual funds in this category is obtained from quoted prices in actively traded markets. Prices for insurance-linked and asset-backed securities are obtained from quotations from broker or pricing services. Commingled funds and limited partnership funds are classified as NAV assets.
(i)This category includes a diversified group of funds and strategies that primarily invests in private equity partnerships. This category also includes investments in private real estate and private debt. All investments in this category are classified as NAV assets.
Schedule of Accumulated Benefit Obligations in Excess of Plan Assets
The following table reflects other postretirement benefit plans with accumulated postretirement benefit obligations in excess of plan assets as of December 31:
DTE EnergyDTE Electric
2021202020212020
(In millions)
Accumulated postretirement benefit obligation$822 $878 $775 $826 
Fair value of plan assets463 470 435 442 
Accumulated postretirement benefit obligation in excess of plan assets$359 $408 $340 $384 
Retiree healthcare plan (VEBA)  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Schedule of VEBA Contributions The following table provides contributions to the VEBA in:
202120202019
(In millions)
DTE Energy$18 $15 $13 
DTE Electric$8 $7 $6 
v3.22.0.1
Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2021
Share-based Payment Arrangement, Noncash Expense [Abstract]  
Schedule of Components of Stock-Based Compensation
The following table summarizes the components of stock-based compensation for DTE Energy:
202120202019
(In millions)
Stock-based compensation expense$71 $63 $71 
Tax benefit$13 $12 $13 
Stock-based compensation cost capitalized in Property, plant, and equipment(a)
$— $— $16 
_______________________________________
(a)In DTE Electric's May 2020 rate order, the MPSC disallowed certain capital expenditures related to incentive compensation. Therefore, beginning in 2020, no stock-based compensation cost will be capitalized in Property, plant, and equipment.
Schedule of Activity Relating to Performance Share Awards
DTE Energy recorded activity relating to performance share awards as follows:
202120202019
(In millions, except per share amounts)
Weighted average grant date fair value of awards granted (per share)$118.43 $129.68 $115.85 
Awards settled in cash(a)
$12 $21 $19 
Awards settled in stock(a)
$74 $53 $79 
Compensation expense$58 $50 $60 
_______________________________________
(a)Sum of awards settled in cash and stock approximates the intrinsic value of the awards.
Schedule of Stock-based Compensation, Performance Shares Activity Rollforward
The following table summarizes DTE Energy’s performance share activity for the period ended December 31, 2021:
Performance SharesWeighted Average
Grant Date
Fair Value
Balance at December 31, 20201,127,437 $117.06 
Grants(a)
567,196 $118.43 
Forfeitures(b)
(162,091)$123.04 
Payouts(429,925)$107.84 
Balance at December 31, 20211,102,617 $120.33 
_______________________________________
(a)Includes 166,686 incremental shares granted in 2021 to DTE Energy employees who did not separate with DT Midstream. The shares were granted to preserve the value of unvested 2019-2021 awards, considering the impact from the spin-off of DT Midstream on DTE Energy's stock price.
(b)Includes the cancellation of 95,923 shares that were held by employees that separated due to the spin-off of DT Midstream.
Schedule of Unrecognized Compensation Cost, Non-Vested Awards
As of December 31, 2021, DTE Energy's total unrecognized compensation cost related to non-vested stock incentive plan arrangements and the weighted average recognition period was as follows:
Unrecognized
Compensation
Cost		Weighted Average
to be Recognized
(In millions)(In years)
Stock awards$19 1.50
Performance shares44 1.04
$63 1.18
v3.22.0.1
Segment and Related Information (Tables)
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Financial Data of Business Segments
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, natural gas sales, and renewable natural gas sales in the following segments:
Year Ended December 31,
202120202019
(In millions)
Electric(a)
$64 $61 $56 
Gas14 16 12 
DTE Vantage575 464 596 
Energy Trading56 31 22 
Corporate and Other2 2 2 
$711 $574 $688 
_______________________________________
(a)Inter-segment billing for the Electric segment includes $4 million and $2 million relating to Non-utility operations for the years ended December 31, 2021 and 2020, respectively.
Financial data of DTE Energy's business segments follows:
ElectricGasDTE VantageEnergy
Trading
Corporate and Other(a)
Reclassifications
and
Eliminations		Total from
Continuing
Operations		Discontinued
Operations		Total
(In millions)
2021
Operating Revenues — Utility operations$5,809 1,553 — — — (74)$7,288 
Operating Revenues — Non-utility operations$12 — 1,482 6,831 2 (651)$7,676 
Depreciation and amortization$1,122 177 71 6 1 — $1,377 
Interest expense$338 81 28 5 270 (92)$630 
Interest income$— (6)(23)(1)(84)92 $(22)
Equity in earnings of equity method investees$— 1 8 — 29 — $38 
Income Tax Expense (Benefit)$104 38 (31)(27)(214)— $(130)
Net Income (Loss) Attributable to DTE Energy Company$864 214 168 (83)(367)— $796 111 $907 
Investment in equity method investees$6 13 118 — 50 — $187 
Capital expenditures and acquisitions$3,016 621 69 6 — — $3,712 60 $3,772 
Goodwill$1,208 743 25 17 — — $1,993 
Total Assets$28,524 6,729 983 1,174 4,281 (1,972)$39,719 — $39,719 
_______________________________________
(a)Corporate and Other results include significant one-time items resulting from the separation of DT Midstream, including a loss on debt extinguishment of $376 million following the settlement of intercompany borrowings with DT Midstream and optional redemption of DTE Energy long-term debt. DTE Energy also recognized a tax benefit of $85 million for the remeasurement of state deferred tax liabilities following the separation of DT Midstream. Refer to Notes 10 and 14 to the Consolidated Financial Statements, "Income Taxes" and "Long-Term Debt," for additional information.
ElectricGasDTE VantageEnergy
Trading		Corporate
and
Other		Reclassifications
and
Eliminations		Total from
Continuing
Operations		Discontinued
Operations		Total
(In millions)
2020
Operating Revenues — Utility operations$5,506 1,414 — — — (75)$6,845 
Operating Revenues — Non-utility operations$14 — 1,224 3,863 2 (525)$4,578 
Depreciation and amortization$1,057 157 72 5 1 — $1,292 
Interest expense$337 80 37 6 325 (184)$601 
Interest income$(4)(5)(22)(2)(180)184 $(29)
Equity in earnings of equity method investees$— 1 17 — 8 — $26 
Income Tax Expense (Benefit)$108 48 (40)12 (91)— $37 
Net Income (Loss) Attributable to DTE Energy Company$777 186 134 36 (79)— $1,054 314 $1,368 
Investment in equity method investees$6 12 125 — 34 — $177 
Capital expenditures and acquisitions$2,701 574 186 5 — — $3,466 517 $3,983 
Goodwill$1,208 743 25 17 — — $1,993 
Total Assets$26,588 6,339 696 807 5,063 (2,073)$37,420 8,076 $45,496 
ElectricGasDTE VantageEnergy
Trading		Corporate
and
Other		Reclassifications
and
Eliminations		Total from
Continuing
Operations		Discontinued
Operations		Total
(In millions)
2019
Operating Revenues — Utility operations$5,224 1,482 — — — (68)$6,638 
Operating Revenues — Non-utility operations$5 — 1,560 4,610 2 (647)$5,530 
Depreciation and amortization$949 144 69 6 1 — $1,169 
Interest expense$315 78 33 8 266 (132)$568 
Interest income$(2)(6)(9)(4)(120)132 $(9)
Equity in earnings of equity method investees$1 2 14 — (3)— $14 
Income Tax Expense (Benefit)$137 62 (63)17 (82)— $71 
Net Income (Loss) Attributable to DTE Energy Company$714 185 133 49 (126)— $955 214 $1,169 
Investment in equity method investees$5 11 130 — 31 — $177 
Capital expenditures and acquisitions$2,368 530 54 5 — — $2,957 2,510 $5,467 
Goodwill$1,208 743 25 17 — — $1,993 
Total Assets$24,617 5,717 537 798 4,779 (1,843)$34,605 7,663 $42,268 
v3.22.0.1
Related Party Transactions (Tables)
 12 Months Ended
Dec. 31, 2021
Related Party Transactions [Abstract]  
Summary of Related Party Transactions
The following is a summary of DTE Electric's transactions with affiliated companies:
202120202019
(In millions)
Revenues and Other Income
Energy sales$9 $8 $10 
Other services and interest$2 $2 $5 
Shared capital assets$49 $47 $42 
Costs
Fuel and purchased power$13 $16 $6 
Other services and interest$— $1 $24 
Corporate expenses$391 $367 $372 
Other
Dividends declared$588 $539 $494 
Dividends paid$588 $539 $494 
Capital contribution from DTE Energy$555 $636 $180 
v3.22.0.1
Supplementary Quarterly Financial Information (Unaudited ) (Tables)
 12 Months Ended
Dec. 31, 2021
Quarterly Financial Information Disclosure [Abstract]  
Schedule of Quarterly Financial Information
DTE Energy
The sum of quarterly earnings per share may not equal year-end amounts, since quarterly computations are based on weighted average common shares outstanding during each quarter.
First
Quarter		Second
Quarter		Third
Quarter		Fourth
Quarter		Year
(In millions, except per share amounts)
2021
Operating Revenues$3,581 $3,021 $3,715 $4,647 $14,964 
Operating Income433 242 405 415 1,495 
Net Income from Continuing Operations(a)
317 114 55 300 786 
Net Income (Loss) from Discontinued Operations80 65 (33)5 117 
Net Income397 179 22 305 903 
Net Income Attributable to DTE Energy Company$397 $179 $25 $306 $907 
Basic Earnings per Share
  Continuing Operations$1.65 $0.60 $0.30 $1.56 $4.11 
  Discontinued Operations0.40 0.32 (0.17)0.02 0.57 
Total$2.05 $0.92 $0.13 $1.58 $4.68 
Diluted Earnings per Share
  Continuing Operations$1.65 $0.60 $0.30 $1.55 $4.10 
  Discontinued Operations0.40 0.32 (0.17)0.02 0.57 
Total$2.05 $0.92 $0.13 $1.57 $4.67 
2020
Operating Revenues$2,852 $2,411 $3,080 $3,080 $11,423 
Operating Income445 263 479 368 1,555 
Net Income from Continuing Operations268 201 370 206 1,045 
Net Income from Discontinued Operations74 76 107 69 326 
Net Income342 277 477 275 1,371 
Net Income Attributable to DTE Energy Company$340 $277 $476 $275 $1,368 
Basic Earnings per Share
  Continuing Operations$1.39 $1.06 $1.93 $1.08 $5.46 
  Discontinued Operations0.38 0.38 0.54 0.34 1.63 
Total$1.77 $1.44 $2.47 $1.42 $7.09 
Diluted Earnings per Share
  Continuing Operations$1.39 $1.06 $1.92 $1.08 $5.45 
  Discontinued Operations0.37 0.38 0.54 0.34 1.63 
Total$1.76 $1.44 $2.46 $1.42 $7.08 
_______________________________________
(a)Third Quarter 2021 results include significant one-time items resulting from the separation of DT Midstream, including a loss on debt extinguishment of $376 million following the settlement of intercompany borrowings with DT midstream and optional redemption of DTE Energy long-term debt. Refer to Note 14 to the Consolidated Financial Statements, "Long-Term Debt," for additional information. Third Quarter 2021 results also include a tax benefit of $85 million for the remeasurement of state deferred tax liabilities following the separation of DT Midstream. Refer to Note 10 to the Consolidated Financial Statements, "Income Taxes," for additional information.
v3.22.0.1
Organization and Basis of Presentation (Details Textuals)
customer in Millions, $ in Millions
Dec. 31, 2021
USD ($)
customer
Dec. 31, 2020
USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]    
Number of electric utility customers | customer 2.3  
Number of gas utility customers | customer 1.3  
Variable Interest Entity [Line Items]    
Material potential exposure $ 0  
Investments in equity method investees 187 $ 177
Amount in excess of carrying amount 99 93
Undistributed earnings from equity method investees 32 $ 15
DTE Electric    
Variable Interest Entity [Line Items]    
Material potential exposure $ 0  
v3.22.0.1
Organization and Basis of Presentation (Consolidated Variable Interest Entities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
ASSETS      
Cash and cash equivalents $ 28 $ 472  
Restricted cash 7 2  
Accounts receivable 1,695 1,542  
Property, plant, and equipment, net 26,944 24,499  
Total Assets 39,719 45,496 $ 42,268
LIABILITIES      
Short-term borrowings 758 38  
Variable interest entity, primary beneficiary      
ASSETS      
Cash and cash equivalents 11 20  
Restricted cash 6 0  
Accounts receivable 1 28  
Inventories 3 107  
Property, plant, and equipment, net 4 14  
Notes receivable and other 70 33  
Total Assets 95 202  
LIABILITIES      
Accounts payable 5 22  
Short-term borrowings 75 38  
Other current and long-term liabilities 0 4  
Total liabilities $ 80 $ 64  
v3.22.0.1
Organization and Basis of Presentation (Non-Consolidated Variable Interest Entities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Variable Interest Entity [Line Items]    
Investments in equity method investees $ 187 $ 177
Notes receivable 310 261
Variable interest entity, nonconsolidated    
Variable Interest Entity [Line Items]    
Investments in equity method investees 172 159
Notes receivable 13 21
Future funding commitments $ 3 $ 6
v3.22.0.1
Significant Accounting Policies (Schedule of Other Income) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Schedule of Other Nonoperating Income, by Component [Line Items]      
Income from REF entities $ 141 $ 139 $ 130
Equity in earnings of equity method investees 38 26 14
Contract services 27 28 29
Allowance for equity funds used during construction 27 25 24
Gains from rabbi trust securities 8 28 37
Other 13 13 16
Other income 254 259 250
DTE Electric      
Schedule of Other Nonoperating Income, by Component [Line Items]      
Contract services 27 28 32
Allowance for equity funds used during construction 25 23 22
Gains from rabbi trust securities 8 28 37
Other 11 8 16
Other income $ 71 $ 87 $ 107
v3.22.0.1
Significant Accounting Policies (Details Textuals) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Significant Accounting Policies [Line Items]      
Unbilled revenues $ 1,695,000,000 $ 1,542,000,000  
Specific review of probable future collections based on receivable balances, threshold duration 30 days    
Intangible assets amortization expense $ 16,000,000 16,000,000 $ 9,000,000
Capitalized cloud computing costs 16,000,000 0  
Excise and sales taxes net impact on statement of operations 0    
Charitable contributions 25,000,000 20,000,000 $ 0
Natural gas inventory      
Significant Accounting Policies [Line Items]      
LIFO inventory amount 50,000,000 40,000,000  
Excess of replacement costs over stated LIFO value 136,000,000 62,000,000  
Notes receivable      
Significant Accounting Policies [Line Items]      
Financing receivables 150,000,000    
Past due      
Significant Accounting Policies [Line Items]      
Financing receivables $ 0    
Minimum | Notes receivable      
Significant Accounting Policies [Line Items]      
Number of dates after which receivable is considered delinquent 60 days    
Maximum | Notes receivable      
Significant Accounting Policies [Line Items]      
Number of dates after which receivable is considered delinquent 120 days    
DTE Electric and DTE Gas      
Significant Accounting Policies [Line Items]      
Threshold period past due for write-off of trade accounts receivable 150 days    
DTE Electric and DTE Gas | Accounts Receivable      
Significant Accounting Policies [Line Items]      
Number of dates after which receivable is considered delinquent 21 days    
DTE Electric      
Significant Accounting Policies [Line Items]      
Unbilled revenues $ 694,000,000 763,000,000  
Capitalized cloud computing costs 12,000,000 0  
DTE Electric | Notes receivable      
Significant Accounting Policies [Line Items]      
Financing receivables 17,000,000    
Unbilled revenues      
Significant Accounting Policies [Line Items]      
Unbilled revenues 1,000,000,000 800,000,000  
Unbilled revenues | DTE Electric      
Significant Accounting Policies [Line Items]      
Unbilled revenues $ 270,000,000 $ 260,000,000  
v3.22.0.1
Significant Accounting Policies (Accumulated Other Comprehensive Loss) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance $ 12,589 $ 11,836 $ 10,717
Other comprehensive income (loss) 15 11 (3)
Separation of DT Midstream (4,010)    
Ending balance 8,713 12,589 11,836
AOCI including portion attributable to noncontrolling interest      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (137) (148)  
Other comprehensive income (loss) before reclassifications 2 (4)  
Amounts reclassified from Accumulated other comprehensive loss 13 15  
Other comprehensive income (loss) 15 11  
Separation of DT Midstream 10    
Ending balance (112) (137) (148)
Net Unrealized Gain (Loss) on Derivatives      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (23) (25)  
Other comprehensive income (loss) before reclassifications 1 (3)  
Amounts reclassified from Accumulated other comprehensive loss 6 5  
Other comprehensive income (loss) 7 2  
Separation of DT Midstream 5    
Ending balance (11) (23) (25)
Benefit Obligations      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (109) (117)  
Other comprehensive income (loss) before reclassifications 1 (2)  
Amounts reclassified from Accumulated other comprehensive loss 7 10  
Other comprehensive income (loss) 8 8  
Separation of DT Midstream 0    
Ending balance (101) (109) (117)
Foreign Currency Translation      
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]      
Beginning balance (5) (6)  
Other comprehensive income (loss) before reclassifications 0 1  
Amounts reclassified from Accumulated other comprehensive loss 0 0  
Other comprehensive income (loss) 0 1  
Separation of DT Midstream 5    
Ending balance $ 0 $ (5) $ (6)
v3.22.0.1
Significant Accounting Policies (Financing Receivables Classified by Internal Grade of Credit Risk) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Notes receivable  
Financing Receivable, Credit Quality Indicator [Line Items]  
2021 $ 16
2020 107
2019 and prior 27
Total 150
Notes receivable | DTE Electric  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 17
Notes receivable | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
2021 0
2020 0
2019 and prior 21
Total 21
Notes receivable | Internal grade 1 | DTE Electric  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 14
Notes receivable | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
2021 16
2020 107
2019 and prior 6
Total 129
Notes receivable | Internal grade 2 | DTE Electric  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 3
Net investment in leases  
Financing Receivable, Credit Quality Indicator [Line Items]  
2021 0
2020 160
2019 and prior 39
Total 199
Net investment in leases | DTE Electric  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 0
Net investment in leases | Internal grade 1  
Financing Receivable, Credit Quality Indicator [Line Items]  
2021 0
2020 1
2019 and prior 38
Total 39
Net investment in leases | Internal grade 1 | DTE Electric  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total 0
Net investment in leases | Internal grade 2  
Financing Receivable, Credit Quality Indicator [Line Items]  
2021 0
2020 159
2019 and prior 1
Total 160
Net investment in leases | Internal grade 2 | DTE Electric  
Financing Receivable, Credit Quality Indicator [Line Items]  
Total $ 0
v3.22.0.1
Significant Accounting Policies (Roll-Forward of Activity for Financing Receivables Credit Loss Reserves) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Jan. 01, 2020
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance $ 104 $ 83  
Current period provision 54 105  
Write-offs charged against allowance (127) (134)  
Recoveries of amounts previously written off 61 50  
Ending balance 92 104  
DTE Electric      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 57 46  
Current period provision 36 61  
Write-offs charged against allowance (77) (80)  
Recoveries of amounts previously written off 38 30  
Ending balance 54 57  
Trade accounts receivable      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 101 79  
Current period provision 53 102  
Write-offs charged against allowance (126) (130)  
Recoveries of amounts previously written off 61 50  
Ending balance 89 101  
Trade accounts receivable | Discontinued operations, spinoff | DT Midstream      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Trade accounts receivable reserve related to discontinued operations     $ 8
Other receivables      
Financing Receivable, Allowance for Credit Loss [Roll Forward]      
Beginning balance 3 4  
Current period provision 1 3  
Write-offs charged against allowance (1) (4)  
Recoveries of amounts previously written off 0 0  
Ending balance $ 3 $ 3  
v3.22.0.1
Significant Accounting Policies (Uncollectible Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Uncollectible expense $ 55 $ 105 $ 106
DTE Electric      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Uncollectible expense $ 36 $ 62 $ 65
v3.22.0.1
Significant Accounting Policies (Intangible Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ (98) $ (83)
Indefinite-lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization 4 11
Long-term intangible assets    
Gross Carrying Value 275 282
Accumulated Amortization (98) (83)
Net Carrying Value 177 199
DTE Electric    
Indefinite-lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization 2 11
Contract intangibles    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Value 271 271
Accumulated Amortization (98) (83)
Net Carrying Value 173 188
Long-term intangible assets    
Accumulated Amortization $ (98) $ (83)
Contract intangibles | Minimum    
Finite-Lived Intangible Assets [Line Items]    
Useful Lives 6 years  
Contract intangibles | Maximum    
Finite-Lived Intangible Assets [Line Items]    
Useful Lives 26 years  
v3.22.0.1
Significant Accounting Policies (Future Amortization Expense Intangible Assets) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Estimated amortization expense  
2022 $ 16
2023 16
2024 16
2025 16
2026 $ 14
v3.22.0.1
Dispositions and Impairments (Details Textuals)
 1 Months Ended 3 Months Ended 12 Months Ended
Jul. 01, 2021
USD ($)
shares
Jun. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Face amount     $ 4,535,000,000   $ 4,535,000,000    
Redemption of long-term debt       $ 2,600,000,000 3,522,000,000 $ 882,000,000 $ 821,000,000
Net assets of DT Midstream         4,010,000,000    
Deferred revenue recognized         59,000,000    
Steel industry customer              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Deferred revenue recognized     17,000,000        
DTE Vantage              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Impairment charge         27,000,000    
DTE Vantage | Property, plant and equipment              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Impairment of long-lived assets held for use         18,000,000    
DTE Vantage | Other noncurrent assets              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Impairment of long-lived assets held for use         9,000,000    
Discontinued operations, spinoff | DT Midstream              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Assets from discontinued operations     0   0 8,076,000,000  
Liabilities from discontinued operations     $ 0   $ 0 $ 935,000,000  
Net assets of DT Midstream $ 4,000,000,000            
Maximum | Discontinued operations, spinoff | DT Midstream              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Transition Services Agreement period 24 months            
Senior Notes              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Redemption of long-term debt       $ 2,600,000,000      
DT Midstream              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Distribution of shares (in shares) | shares 96,732,466            
Share distribution ratio 0.5            
Discount and debt issuance costs   $ 53,000,000          
Cash payment for dividend to DTE Energy   501,000,000          
DT Midstream | Affiliated entity              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Cash payment for short-term borrowings due to DTE Energy   2,537,000,000          
Net cash payment for accounts receivable due from and accounts payable due to DTE Energy   9,000,000          
DT Midstream | June 2021 Variable Rate Term Loan Maturing in 2028              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Face amount   1,000,000,000          
DT Midstream | Senior Notes              
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]              
Face amount   $ 2,100,000,000          
v3.22.0.1
Dispositions and Impairments (Financial Results That Have Been Reclassified from Continuing Operations and Included in Discontinued Operations) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Other (Income) and Deductions                      
Net Income from Discontinued Operations, Net of Taxes $ 5 $ (33) $ 65 $ 80 $ 69 $ 107 $ 76 $ 74 $ 117 $ 326 $ 230
Less: Net Income Attributable to Noncontrolling Interests                 6 12 16
Net Income from Discontinued Operations                 111 314 214
Transaction costs                 59 8  
DT Midstream | Discontinued operations, spinoff                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Operating Revenues — Non-utility operations                 405 754 501
Operating Expenses                      
Cost of gas and other — non-utility                 15 21 18
Operation and maintenance                 123 138 103
Depreciation and amortization                 82 151 94
Taxes other than income                 13 15 8
Asset (gains) losses and impairments, net                 17 (2) 1
Operating Expenses                 250 323 224
Operating Income                 155 431 277
Other (Income) and Deductions                      
Interest expense                 50 113 73
Interest income                 (4) (9) (8)
Other income                 (62) (129) (100)
Other expenses                 0 0 1
Other (Income) and Deductions                 (16) (25) (34)
Income from Discontinued Operations Before Income Taxes                 171 456 311
Income Tax Expense                 54 130 81
Net Income from Discontinued Operations, Net of Taxes                 117 326 230
Less: Net Income Attributable to Noncontrolling Interests                 6 12 16
Net Income from Discontinued Operations                 $ 111 $ 314 $ 214
v3.22.0.1
Dispositions and Impairments (Major Classes of Assets and Liabilities Transferred and Presented as Discontinued Operations) (Details) - USD ($)
Dec. 31, 2021
Dec. 31, 2020
Total Assets of Discontinued Operations    
Current assets of discontinued operations for DTE Energy $ 0 $ 217,000,000
Noncurrent assets of discontinued operations for DTE Energy 0 7,859,000,000
Total Liabilities of Discontinued Operations    
Current liabilities of discontinued operations for DTE Energy 0 99,000,000
Noncurrent liabilities of discontinued operations for DTE Energy 0 836,000,000
Discontinued operations, spinoff | DT Midstream    
Discontinued Operations and Disposal Groups [Abstract]    
Cash   42,000,000
Total Assets of Discontinued Operations    
Cash   42,000,000
Accounts receivable   126,000,000
Inventories   8,000,000
Other   44,000,000
Current assets of DT Midstream   220,000,000
Less: Previously affiliated amounts eliminated at DTE Energy   3,000,000
Current assets of discontinued operations for DTE Energy   217,000,000
Investments in equity method investees   1,691,000,000
Net property, plant, and equipment   3,470,000,000
Goodwill   473,000,000
Intangible assets   2,140,000,000
Notes receivable   19,000,000
Operating lease right-of-use assets   45,000,000
Other   21,000,000
Noncurrent assets of discontinued operations for DTE Energy   7,859,000,000
Total Assets of Discontinued Operations for DTE Energy 0 8,076,000,000
Total Liabilities of Discontinued Operations    
Accounts payable   39,000,000
Operating lease liabilities   17,000,000
Short-term borrowings due to DTE Energy   2,913,000,000
Other   53,000,000
Current liabilities of DT Midstream   3,022,000,000
Less: Previously affiliated amounts eliminated at DTE Energy   2,923,000,000
Current liabilities of discontinued operations for DTE Energy   99,000,000
Deferred income taxes   753,000,000
Asset retirement obligations   10,000,000
Operating lease liabilities   28,000,000
Other   45,000,000
Noncurrent liabilities of discontinued operations for DTE Energy   836,000,000
Total Liabilities of Discontinued Operations for DTE Energy $ 0 $ 935,000,000
v3.22.0.1
Dispositions and Impairments (Significant Non-cash Items, Capital Expenditures, and Significant Financing Activities of Discontinued Operations) (Details) - DT Midstream - Discontinued operations, spinoff - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Activities      
Depreciation and amortization $ 82 $ 151 $ 94
Deferred income taxes 53 125 78
Equity earnings of equity method investees (59) (106) (97)
Asset (gains) losses and impairments, net 19 (2) 1
Investing Activities      
Plant and equipment expenditures — non-utility (60) (517) (214)
Acquisitions related to business combinations, net of cash acquired 0 0 (2,296)
Financing Activities      
Purchase of noncontrolling interest 0 0 (297)
Acquisition related deferred payment, excluding accretion $ 0 $ (380) $ 0
v3.22.0.1
Revenue (Disaggregation of Revenue by Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]                      
Revenues $ 4,647 $ 3,715 $ 3,021 $ 3,581 $ 3,080 $ 3,080 $ 2,411 $ 2,852 $ 14,964 $ 11,423 $ 12,168
Electric                      
Disaggregation of Revenue [Line Items]                      
Revenues                 5,821 5,520 5,229
Electric | Residential                      
Disaggregation of Revenue [Line Items]                      
Revenues                 2,926 2,825 2,427
Electric | Commercial                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,908 1,739 1,795
Electric | Industrial                      
Disaggregation of Revenue [Line Items]                      
Revenues                 628 592 659
Electric | Other                      
Disaggregation of Revenue [Line Items]                      
Revenues                 359 364 348
Electric | Other | DTE Sustainable Generation                      
Disaggregation of Revenue [Line Items]                      
Revenues                 12 14 5
Gas                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,553 1,414 1,482
Gas | Other                      
Disaggregation of Revenue [Line Items]                      
Revenues                 180 146 142
Gas | Gas sales                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,058 971 1,043
Gas | End User Transportation                      
Disaggregation of Revenue [Line Items]                      
Revenues                 233 218 219
Gas | Intermediate Transportation                      
Disaggregation of Revenue [Line Items]                      
Revenues                 82 79 78
DTE Vantage                      
Disaggregation of Revenue [Line Items]                      
Revenues                 1,482 1,224 1,560
Energy Trading                      
Disaggregation of Revenue [Line Items]                      
Revenues                 $ 6,831 $ 3,863 $ 4,610
v3.22.0.1
Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Disaggregation of Revenue [Line Items]      
Leases $ 198 $ 181 $ 184
Electric      
Disaggregation of Revenue [Line Items]      
Alternative Revenue Program 36 26 22
Other revenues 19 22 19
Gas      
Disaggregation of Revenue [Line Items]      
Alternative Revenue Program 10 10 8
Other revenues 6 8 7
DTE Vantage      
Disaggregation of Revenue [Line Items]      
Leases 103 99 121
Energy Trading      
Disaggregation of Revenue [Line Items]      
Derivatives $ 5,603 $ 2,690 $ 3,415
v3.22.0.1
Revenue (Details Textuals)
 12 Months Ended
Dec. 31, 2021
DTE Vantage  
Revenue from External Customer [Line Items]  
Payment terms 30 days
v3.22.0.1
Revenue (Deferred Revenue) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Contract Liability [Roll Forward]    
Beginning Balance $ 65  
Increases due to cash received or receivable, excluding amounts recognized as revenue during the period 72  
Revenue recognized that was included in the deferred revenue balance at the beginning of the period (59)  
Ending Balance $ 78  
Discontinued operations, spinoff | DT Midstream    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Deferred revenue   $ 22
v3.22.0.1
Revenue (Expected Recognition of Deferred Revenue) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 78
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 $ 75
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 $ 1
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 $ 1
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 $ 0
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 0
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 1
Remaining performance obligation, expected timing of satisfaction
v3.22.0.1
Revenue (Expected Recognition of Deferred Revenue for fixed consideration) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 78
Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation 1,262
Fixed Consideration | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation 24
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 $ 75
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 292
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01 | Fixed Consideration | 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
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 $ 1
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 285
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01 | Fixed Consideration | 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
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 $ 1
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 171
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01 | Fixed Consideration | 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
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 $ 0
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 91
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01 | Fixed Consideration | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 0
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 0
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 59
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01 | Fixed Consideration | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 0
Remaining performance obligation, expected timing of satisfaction 1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 1
Remaining performance obligation, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Fixed Consideration  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 364
Remaining performance obligation, expected timing of satisfaction
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01 | Fixed Consideration | DTE Electric  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Remaining performance obligation $ 0
Remaining performance obligation, expected timing of satisfaction
v3.22.0.1
Property, Plant, and Equipment (Summary of Property by Classification) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment $ 37,083 $ 34,016
Accumulated depreciation and amortization (10,139) (9,517)
Net property, plant, and equipment 26,944 24,499
DTE Vantage    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 1,118 1,194
Accumulated depreciation and amortization (545) (619)
Other    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 208 217
Accumulated depreciation and amortization (73) (84)
DTE Electric    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 28,849 26,171
Accumulated depreciation and amortization (7,676) (7,050)
Net property, plant, and equipment 21,173 19,121
DTE Electric | Nuclear    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 3,394 3,295
Accumulated depreciation and amortization (413) (373)
DTE Electric | Renewables    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 2,522 1,817
Accumulated depreciation and amortization (357) (295)
DTE Electric | Fossil and other generation    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 8,640 8,031
Accumulated depreciation and amortization (3,214) (3,014)
DTE Electric | Distribution    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 11,414 10,354
Accumulated depreciation and amortization (2,842) (2,686)
DTE Electric | Other    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 2,879 2,674
Accumulated depreciation and amortization (850) (682)
DTE Gas    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 6,908 6,434
Accumulated depreciation and amortization (1,845) (1,764)
DTE Gas | Distribution    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 4,900 4,517
Accumulated depreciation and amortization (1,265) (1,215)
DTE Gas | Storage    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 593 576
Accumulated depreciation and amortization (154) (146)
DTE Gas | Transmission and other    
Property, Plant, and Equipment [Line Items]    
Property, plant, and equipment 1,415 1,341
Accumulated depreciation and amortization $ (426) $ (403)
v3.22.0.1
Property, Plant, and Equipment (Schedule of AFUDC and Capitalized Interest Rates (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant, and Equipment [Line Items]      
Non-regulated businesses capitalized interest 3.30% 3.90% 4.00%
DTE Electric      
Property, Plant, and Equipment [Line Items]      
AFUDC 5.46% 5.47% 5.43%
DTE Gas      
Property, Plant, and Equipment [Line Items]      
AFUDC 5.55% 5.56% 5.56%
v3.22.0.1
Property, Plant, and Equipment (Schedule of AFUDC and Interest Capitalized) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]      
Allowance for debt funds used during construction and interest capitalized $ 12 $ 11 $ 14
Allowance for equity funds used during construction 27 25 24
Total 39 36 38
DTE Electric      
Property, Plant, and Equipment [Line Items]      
Allowance for debt funds used during construction 11 10 10
Allowance for equity funds used during construction 25 23 22
Total $ 36 $ 33 $ 32
v3.22.0.1
Property, Plant, and Equipment (Details Textuals)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Minimum | Non-utility      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 3 years    
Minimum | Capitalized software      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 3 years    
Maximum | Non-utility      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 50 years    
Maximum | Capitalized software      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 15 years    
DTE Electric | Minimum | Other      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 3 years    
DTE Electric | Minimum | Capitalized software      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 3 years    
DTE Electric | Maximum | Other      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 80 years    
DTE Electric | Maximum | Capitalized software      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 15 years    
DTE Gas | Minimum | Transmission and other      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 3 years    
DTE Gas | Maximum | Transmission and other      
Public Utility Property, Plant, and Equipment [Line Items]      
Property plant and equipment, useful life 80 years    
DTE Electric      
Public Utility Property, Plant, and Equipment [Line Items]      
Composite depreciation rate for plants in service 4.20% 4.20% 4.00%
DTE Gas      
Public Utility Property, Plant, and Equipment [Line Items]      
Composite depreciation rate for plants in service 2.90% 2.80% 2.70%
v3.22.0.1
Property, Plant, and Equipment (Average Estimated Useful Life of Each Major Class) (Details)
 12 Months Ended
Dec. 31, 2021
DTE Electric  
Public Utility Property, Plant, and Equipment [Line Items]  
Useful Life - Generation 34 years
Useful Life - Distribution 38 years
DTE Gas  
Public Utility Property, Plant, and Equipment [Line Items]  
Useful Life - Distribution 49 years
Useful Life - Storage 58 years
v3.22.0.1
Property, Plant, and Equipment (Depreciation and Amortization) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant, and Equipment [Line Items]      
Property, plant, and equipment $ 1,095 $ 1,025 $ 927
Regulatory assets and liabilities 259 244 227
Intangible assets 16 16 9
Other 7 7 6
Depreciation and amortization 1,377 1,292 1,169
DTE Electric      
Property, Plant, and Equipment [Line Items]      
Property, plant, and equipment 890 831 748
Regulatory assets and liabilities 214 207 193
Other 5 5 5
Depreciation and amortization $ 1,109 $ 1,043 $ 946
v3.22.0.1
Property, Plant, and Equipment (Capitalized Software) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant, and Equipment [Line Items]      
Amortization expense of capitalized software $ 145 $ 128 $ 122
Gross carrying value of capitalized software 920 863  
Accumulated amortization of capitalized software 493 430  
DTE Electric      
Property, Plant, and Equipment [Line Items]      
Amortization expense of capitalized software 132 118 $ 112
Gross carrying value of capitalized software 826 756  
Accumulated amortization of capitalized software $ 439 $ 363  
v3.22.0.1
Jointly-Owned Utility Plant (Details Textuals)
Dec. 31, 2021
plant
Belle River Unit 1  
Jointly-Owned Utility Plant Interests [Line Items]  
Percent of the total capacity and energy of the plant 19.00%
Ludington Hydroelectric Pumped Storage  
Jointly-Owned Utility Plant Interests [Line Items]  
Percent of the total capacity and energy of the plant 51.00%
DTE Electric  
Jointly-Owned Utility Plant Interests [Line Items]  
Number of power plants owned 2
v3.22.0.1
Jointly-Owned Utility Plant (Ownership Information) (Details) - DTE Electric
$ in Millions
Dec. 31, 2021
USD ($)
MW
Belle River  
Jointly-Owned Utility Plant Interests [Line Items]  
Total plant capacity | MW 1,270,000
Ownership interest 81.00%
Investment in Property, plant, and equipment (in millions) $ 1,952
Accumulated depreciation (in millions) $ 1,007
Ludington Hydroelectric Pumped Storage  
Jointly-Owned Utility Plant Interests [Line Items]  
Total plant capacity | MW 2,220,000
Ownership interest 49.00%
Investment in Property, plant, and equipment (in millions) $ 618
Accumulated depreciation (in millions) $ 128
v3.22.0.1
Asset Retirement Obligations (Rollforward) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]      
Asset retirement obligations at January 1 $ 2,829 $ 2,656 $ 2,463
Accretion 167 156 148
Liabilities incurred 28 24 11
Liabilities settled (30) (13) (17)
Revision in estimated cash flows 168 6 51
Asset retirement obligations at December 31 3,162 2,829 2,656
DTE Electric      
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]      
Asset retirement obligations at January 1 2,607 2,447 2,271
Accretion 155 145 138
Liabilities incurred 29 18 1
Liabilities settled (27) (8) (14)
Revision in estimated cash flows 168 5 51
Asset retirement obligations at December 31 $ 2,932 $ 2,607 $ 2,447
v3.22.0.1
Asset Retirement Obligations (Details Textuals) - Fermi 2
Dec. 31, 2021
USD ($)
Asset Retirement Obligations [Line Items]  
Nuclear decommissioning liabilities funded through surcharge and included in ARO balance $ 2,400,000,000
Liabilities balance upon completion of decommissioning $ 0
v3.22.0.1
Regulatory Matters (Schedule of Regulatory Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Regulatory Assets [Line Items]    
Regulatory assets $ 3,677 $ 4,254
Less amount included in Current Assets (195) (129)
Regulatory assets, noncurrent 3,482 4,125
Pension    
Regulatory Assets [Line Items]    
Regulatory assets 1,372 1,938
Other postretirement costs    
Regulatory Assets [Line Items]    
Regulatory assets 53 165
Recoverable undepreciated costs on retiring plants    
Regulatory Assets [Line Items]    
Regulatory assets 667 664
Fermi 2 asset retirement obligation    
Regulatory Assets [Line Items]    
Regulatory assets 613 645
Recoverable Michigan income taxes    
Regulatory Assets [Line Items]    
Regulatory assets 163 176
Enhanced Tree Trimming Program deferred costs    
Regulatory Assets [Line Items]    
Regulatory assets 189 119
Accrued PSCR/GCR revenue    
Regulatory Assets [Line Items]    
Regulatory assets 160 100
Recoverable income taxes related to AFUDC equity    
Regulatory Assets [Line Items]    
Regulatory assets 68 64
Energy Waste Reduction incentive    
Regulatory Assets [Line Items]    
Regulatory assets 79 62
Deferred environmental costs    
Regulatory Assets [Line Items]    
Regulatory assets 51 57
Unamortized loss on reacquired debt    
Regulatory Assets [Line Items]    
Regulatory assets 51 55
Nuclear Performance Evaluation and Review Committee Tracker    
Regulatory Assets [Line Items]    
Regulatory assets 39 55
Customer360 deferred costs    
Regulatory Assets [Line Items]    
Regulatory assets 46 51
Non-service pension and other postretirement costs    
Regulatory Assets [Line Items]    
Regulatory assets 25 21
Energy Waste Reduction    
Regulatory Assets [Line Items]    
Regulatory assets 20 19
Other recoverable income taxes    
Regulatory Assets [Line Items]    
Regulatory assets 16 19
Transitional Reconciliation Mechanism    
Regulatory Assets [Line Items]    
Regulatory assets 8 11
Other    
Regulatory Assets [Line Items]    
Regulatory assets 57 33
DTE Electric    
Regulatory Assets [Line Items]    
Regulatory assets 3,136 3,563
Less amount included in Current Assets (168) (123)
Regulatory assets, noncurrent 2,968 3,440
DTE Electric | Pension    
Regulatory Assets [Line Items]    
Regulatory assets 1,056 1,477
DTE Electric | Other postretirement costs    
Regulatory Assets [Line Items]    
Regulatory assets 27 108
DTE Electric | Recoverable undepreciated costs on retiring plants    
Regulatory Assets [Line Items]    
Regulatory assets 667 664
DTE Electric | Fermi 2 asset retirement obligation    
Regulatory Assets [Line Items]    
Regulatory assets 613 645
DTE Electric | Recoverable Michigan income taxes    
Regulatory Assets [Line Items]    
Regulatory assets 133 142
DTE Electric | Enhanced Tree Trimming Program deferred costs    
Regulatory Assets [Line Items]    
Regulatory assets 189 119
DTE Electric | Accrued PSCR/GCR revenue    
Regulatory Assets [Line Items]    
Regulatory assets 142 100
DTE Electric | Recoverable income taxes related to AFUDC equity    
Regulatory Assets [Line Items]    
Regulatory assets 61 54
DTE Electric | Energy Waste Reduction incentive    
Regulatory Assets [Line Items]    
Regulatory assets 63 49
DTE Electric | Deferred environmental costs    
Regulatory Assets [Line Items]    
Regulatory assets 0 0
DTE Electric | Unamortized loss on reacquired debt    
Regulatory Assets [Line Items]    
Regulatory assets 38 41
DTE Electric | Nuclear Performance Evaluation and Review Committee Tracker    
Regulatory Assets [Line Items]    
Regulatory assets 39 55
DTE Electric | Customer360 deferred costs    
Regulatory Assets [Line Items]    
Regulatory assets 46 51
DTE Electric | Non-service pension and other postretirement costs    
Regulatory Assets [Line Items]    
Regulatory assets 0 0
DTE Electric | Energy Waste Reduction    
Regulatory Assets [Line Items]    
Regulatory assets 0 0
DTE Electric | Other recoverable income taxes    
Regulatory Assets [Line Items]    
Regulatory assets 16 19
DTE Electric | Transitional Reconciliation Mechanism    
Regulatory Assets [Line Items]    
Regulatory assets 8 11
DTE Electric | Other    
Regulatory Assets [Line Items]    
Regulatory assets $ 38 $ 28
v3.22.0.1
Regulatory Matters (Schedule of Regulatory Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Regulatory Liabilities [Line Items]    
Regulatory liabilities $ 3,262 $ 3,402
Less amount included in Current Liabilities (156) (39)
Regulatory liabilities, noncurrent 3,106 3,363
Refundable federal income taxes    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 2,117 2,255
Removal costs liability    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 679 831
Negative other postretirement offset    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 150 122
Non-service pension and other postretirement costs    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 110 78
Incremental tree trim surge    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 90 0
COVID-19 voluntary refund    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 30 30
Energy Waste Reduction    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 27 15
Renewable energy    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 13 21
Other    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 46 50
DTE Electric    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 2,375 2,450
Less amount included in Current Liabilities (154) (18)
Regulatory liabilities, noncurrent 2,221 2,432
DTE Electric | Refundable federal income taxes    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 1,729 1,827
DTE Electric | Removal costs liability    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 283 410
DTE Electric | Negative other postretirement offset    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 106 86
DTE Electric | Non-service pension and other postretirement costs    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 54 36
DTE Electric | Incremental tree trim surge    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 90 0
DTE Electric | COVID-19 voluntary refund    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 30 30
DTE Electric | Energy Waste Reduction    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 27 15
DTE Electric | Renewable energy    
Regulatory Liabilities [Line Items]    
Regulatory liabilities 13 21
DTE Electric | Other    
Regulatory Liabilities [Line Items]    
Regulatory liabilities $ 43 $ 25
v3.22.0.1
Regulatory Matters (Details Textuals) - USD ($)
$ in Millions
 12 Months Ended
Jan. 21, 2022
Dec. 09, 2021
Feb. 12, 2021
Dec. 31, 2021
Dec. 28, 2021
Dec. 27, 2021
Nov. 04, 2021
Aug. 31, 2021
Jun. 23, 2021
Mar. 26, 2021
Jul. 09, 2020
Regulatory Assets [Line Items]                      
Deferral of investigation and remediation of costs associated with gas utilities former MGP sites       10 years              
DTE Electric | MPSC                      
Regulatory Assets [Line Items]                      
Authorized issuance of securitization bonds of qualified costs, maximum                 $ 236    
Regulatory liability for non-plant-related accumulated deferred income tax balances that resulted from the TCJA, accelerated amortization approved                     $ 102
Requested securitization financing of qualified costs                   $ 184  
DTE Electric | MPSC | 2022 Electric Rate Case Filing | Subsequent Event                      
Regulatory Assets [Line Items]                      
Requested rate increase $ 388                    
Approved return on equity, percent 9.90%                    
Requested return on equity, percent 10.25%                    
DTE Electric | MPSC | Incremental tree trim surge                      
Regulatory Assets [Line Items]                      
Requested regulatory liability           $ 90   $ 70      
Approved regulatory liability         $ 90            
DTE Electric | MPSC | Incremental tree trim surge | Minimum                      
Regulatory Assets [Line Items]                      
Approved regulatory liability             $ 70        
DTE Gas | MPSC | 2021 Gas Rate Case Filing                      
Regulatory Assets [Line Items]                      
Requested rate increase     $ 195                
Approved return on equity, percent   9.90% 9.90%                
Requested return on equity, percent     10.25%                
Approved revenue increase   $ 84                  
Recoverable undepreciated costs on retiring plants | DTE Electric | MPSC                      
Regulatory Assets [Line Items]                      
Authorized issuance of securitization bonds of qualified costs, maximum                 73    
Enhanced Tree Trimming Program deferred costs | DTE Electric | MPSC                      
Regulatory Assets [Line Items]                      
Authorized issuance of securitization bonds of qualified costs, maximum                 $ 157    
Customer360 deferred costs                      
Regulatory Assets [Line Items]                      
Approved amortization period       15 years              
Nuclear Performance Evaluation and Review Committee Tracker                      
Regulatory Assets [Line Items]                      
Approved amortization period       5 years              
v3.22.0.1
Income Taxes (Details Textuals) - USD ($)
 3 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Entity Information [Line Items]        
Deferred tax benefit for deferred tax remeasurement $ 85,000,000 $ 85,000,000    
Deferred tax expense for deferred intercompany gain recognized   9,000,000    
Deferred tax asset, general business tax credit carryforwards   1,300,000,000    
State and local net operating loss carry-forwards   73,000,000 $ 36,000,000  
Valuation allowance   51,000,000 41,000,000  
Interest on income taxes accrued   5,000,000 5,000,000  
Interest on income taxes expense   0 1,000,000 $ 1,000,000
Penalties on income taxes accrued   0 0  
State and local net operating loss carry-forwards        
Entity Information [Line Items]        
Valuation allowance   29,000,000 30,000,000  
Charitable contribution carryforwards        
Entity Information [Line Items]        
Increase in valuation allowance   18,000,000    
Federal        
Entity Information [Line Items]        
Net operating loss carry-forwards   950,000,000    
DTE Electric        
Entity Information [Line Items]        
Income tax receivable from related party   31,000,000 8,000,000  
State and local net operating loss carry-forwards   15,000,000 0  
Valuation allowance   0 0  
Interest on income taxes accrued   7,000,000 6,000,000  
Interest on income taxes expense   1,000,000 1,000,000 $ 1,000,000
Penalties on income taxes accrued   0 $ 0  
DTE Electric | General Business Credits        
Entity Information [Line Items]        
Tax credit carry-forward   379,000,000    
DTE Electric | Federal        
Entity Information [Line Items]        
Net operating loss carry-forwards   $ 24,000,000    
v3.22.0.1
Income Taxes (Reconciliation of Income Tax Expense to the Statutory Federal Income Tax Rate) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income Before Income Taxes $ 656 $ 1,082 $ 1,013
Income tax expense at 21% statutory rate 138 227 213
Production tax credits (138) (121) (128)
TCJA regulatory liability amortization (103) (76) (38)
State deferred tax remeasurement due to separation of DT Midstream, net of federal benefit (85) 0 0
Investment tax credits (3) (4) (4)
Net operating loss carryback 0 (34) 0
Enactment of West Virginia income tax legislation, net of federal benefit 8 0 0
Deferred intercompany gain 9 0 0
Valuation allowance on charitable contribution carryforwards 18 3 6
State and local income taxes, excluding items above, net of federal benefit 30 47 29
Other, net (4) (5) (7)
Income Tax Expense (Benefit) $ (130) $ 37 $ 71
Effective income tax rate (19.90%) 3.40% 7.00%
DTE Electric      
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Income Before Income Taxes $ 970 $ 887 $ 854
Income tax expense at 21% statutory rate 204 186 179
Production tax credits (70) (55) (45)
TCJA regulatory liability amortization (73) (62) (35)
Investment tax credits (3) (4) (4)
State and local income taxes, excluding items above, net of federal benefit 54 50 49
Other, net (8) (6) (6)
Income Tax Expense (Benefit) $ 104 $ 109 $ 138
Effective income tax rate 10.70% 12.30% 16.20%
v3.22.0.1
Income Taxes (Components of Income Tax Expense) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Current income tax expense (benefit)      
Federal $ (33) $ (249) $ (183)
State and other income tax (12) 4 3
Total current income taxes (45) (245) (180)
Deferred income tax expense (benefit)      
Federal (42) 227 218
State and other income tax (43) 55 33
Total deferred income taxes (85) 282 251
Income Tax Expense (Benefit) (130) 37 71
DTE Electric      
Current income tax expense (benefit)      
Federal (11) 15 25
State and other income tax (7) 5 16
Total current income taxes (18) 20 41
Deferred income tax expense (benefit)      
Federal 47 30 51
State and other income tax 75 59 46
Total deferred income taxes 122 89 97
Income Tax Expense (Benefit) $ 104 $ 109 $ 138
v3.22.0.1
Income Taxes (Deferred Tax Assets (Liabilities)) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Components of Deferred Tax Assets and Liabilities [Abstract]    
Property, plant, and equipment $ (3,970) $ (3,691)
Regulatory assets and liabilities (117) (102)
Tax credit carry-forwards 1,260 1,144
Pension and benefits 310 310
Federal net operating loss carry-forward 199 109
State and local net operating loss carry-forwards 73 36
Investments in equity method investees 58 51
Other 75 115
Deferred tax assets (liabilities) (2,112) (2,028)
Less: Valuation allowance (51) (41)
Long-term deferred income tax liabilities (2,163) (2,069)
Deferred income tax assets 2,224 2,050
Deferred income tax liabilities (4,387) (4,119)
DTE Electric    
Components of Deferred Tax Assets and Liabilities [Abstract]    
Property, plant, and equipment (3,428) (3,099)
Regulatory assets and liabilities (64) (53)
Tax credit carry-forwards 379 278
Pension and benefits 282 264
Federal net operating loss carry-forward 5 0
State and local net operating loss carry-forwards 15 0
Investments in equity method investees (1) 0
Other 71 85
Deferred tax assets (liabilities) (2,741) (2,525)
Less: Valuation allowance 0 0
Long-term deferred income tax liabilities (2,741) (2,525)
Deferred income tax assets 988 883
Deferred income tax liabilities $ (3,729) $ (3,408)
v3.22.0.1
Income Taxes (Reconciliation of Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning balance $ 10 $ 10 $ 10
Additions for tax positions of prior years 0 0 0
Unrecognized tax benefits, ending balance 10 10 10
DTE Electric      
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning balance 13 13 13
Additions for tax positions of prior years 0 0 0
Unrecognized tax benefits, ending balance $ 13 $ 13 $ 13
v3.22.0.1
Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Basic Earnings per Share                      
Net Income Attributable to DTE Energy Company — continuing operations                 $ 796 $ 1,054 $ 955
Less: Allocation of earnings to net restricted stock awards                 (2) (2) (2)
Net income from continuing operations available to common shareholders — basic                 794 1,052 953
Net Income Attributable to DTE Energy Company — discontinued operations                 111 314 214
Net income available to common shareholders — basic                 $ 905 $ 1,366 $ 1,167
Average number of common shares outstanding — basic (in shares)                 193.0 193.0 185.0
Income from continuing operations (in dollars per share) $ 1.56 $ 0.30 $ 0.60 $ 1.65 $ 1.08 $ 1.93 $ 1.06 $ 1.39 $ 4.11 $ 5.46 $ 5.16
Income (loss) from discontinued operations (in dollars per share) 0.02 (0.17) 0.32 0.40 0.34 0.54 0.38 0.38 0.57 1.63 1.16
Basic Earnings per Common Share (in dollars per share) 1.58 0.13 0.92 2.05 1.42 2.47 1.44 1.77 $ 4.68 $ 7.09 $ 6.32
Diluted Earnings per Share                      
Net Income Attributable to DTE Energy Company — continuing operations                 $ 796 $ 1,054 $ 955
Less: Allocation of earnings to net restricted stock awards                 (2) (2) (2)
Net income from continuing operations available to common shareholders — diluted                 794 1,052 953
Net Income Attributable to DTE Energy Company — discontinued operations                 111 314 214
Net income available to common shareholders — diluted                 $ 905 $ 1,366 $ 1,167
Average number of common shares outstanding — basic (in shares)                 193.0 193.0 185.0
Average dilutive equity units and performance share awards (in shares)                 1.0 0.0 0.0
Average number of common shares outstanding — diluted (in shares)                 194.0 193.0 185.0
Income from continuing operations (in dollars per share) 1.55 0.30 0.60 1.65 1.08 1.92 1.06 1.39 $ 4.10 $ 5.45 $ 5.15
Income from discontinued operations (in dollars per share) 0.02 (0.17) 0.32 0.40 0.34 0.54 0.38 0.37 0.57 1.63 1.16
Diluted Earnings per Common Share (in dollars per share) $ 1.57 $ 0.13 $ 0.92 $ 2.05 $ 1.42 $ 2.46 $ 1.44 $ 1.76 $ 4.67 $ 7.08 $ 6.31
Antidilutive securities excluded from computation of earnings per share (in shares)                 11.5 10.3 10.3
v3.22.0.1
Fair Value (Assets and Liabilities Recorded at Fair Value on a Recurring Basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivative assets    
Derivative assets, gross $ 1,391 $ 567
Derivative assets, netting (1,120) (411)
Derivative assets, net 271 156
Liabilities    
Derivative liabilities, gross (1,508) (533)
Derivative liabilities, netting 1,078 405
Derivative liabilities, net (430) (128)
DTE Electric    
Assets    
Nuclear decommissioning trusts 2,071 1,855
Current liabilities    
Liabilities    
Derivative liabilities, gross (1,037) (386)
Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (471) (147)
Natural Gas    
Derivative assets    
Derivative assets, gross 454 233
Derivative assets, netting (394) (156)
Derivative assets, net 60 77
Liabilities    
Derivative liabilities, gross (594) (223)
Derivative liabilities, netting 347 151
Derivative liabilities, net (247) (72)
Electricity    
Derivative assets    
Derivative assets, gross 643 180
Derivative assets, netting (441) (120)
Derivative assets, net 202 60
Liabilities    
Derivative liabilities, gross (622) (168)
Derivative liabilities, netting 443 125
Derivative liabilities, net (179) (43)
Environmental & Other    
Derivative assets    
Derivative assets, gross 294 154
Derivative assets, netting (285) (135)
Derivative assets, net 9 19
Liabilities    
Derivative liabilities, gross (288) (137)
Derivative liabilities, netting 288 129
Derivative liabilities, net 0 (8)
Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, gross (4) (5)
Derivative liabilities, netting 0 0
Derivative liabilities, net (4) (5)
Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 39 27
Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 205 104
Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 76 0
Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,107 1,169
Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 644 555
Recurring    
Assets    
Cash equivalents 4 438
Derivative assets    
Derivative assets, netting (1,120) (411)
Derivative assets, net 271 156
Total assets 2,507 2,609
Liabilities    
Derivative liabilities, netting 1,078 405
Derivative liabilities, net (430) (128)
Net Assets (Liabilities) at end of period 2,077 2,481
Net Assets (Liabilities) at the end of the period, netting (42) (6)
Recurring | DTE Electric    
Assets    
Cash equivalents 0 4
Derivative assets    
Total assets 2,111 1,890
Recurring | Current assets    
Derivative assets    
Derivative assets, netting (854) (330)
Total assets 185 554
Recurring | Current assets | DTE Electric    
Derivative assets    
Total assets 9 8
Recurring | Noncurrent assets    
Derivative assets    
Derivative assets, netting (266) (81)
Total assets 2,322 2,055
Recurring | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 2,102 1,882
Recurring | Current liabilities    
Liabilities    
Derivative liabilities, netting 799 318
Derivative liabilities, net (238) (68)
Recurring | Noncurrent liabilities    
Liabilities    
Derivative liabilities, netting 279 87
Derivative liabilities, net (192) (60)
Recurring | Restricted cash    
Assets    
Cash equivalents 1 2
Recurring | Natural Gas    
Derivative assets    
Derivative assets, netting (394) (156)
Derivative assets, net 60 77
Liabilities    
Derivative liabilities, netting 347 151
Derivative liabilities, net (247) (72)
Recurring | Electricity    
Derivative assets    
Derivative assets, netting (441) (120)
Derivative assets, net 202 60
Liabilities    
Derivative liabilities, netting 443 125
Derivative liabilities, net (179) (43)
Recurring | Environmental & Other    
Derivative assets    
Derivative assets, netting (285) (135)
Derivative assets, net 9 19
Liabilities    
Derivative liabilities, netting 288 129
Derivative liabilities, net 0 (8)
Recurring | Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, netting 0 0
Derivative liabilities, net (4) (5)
Recurring | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 9 4
Recurring | Cash equivalents    
Assets    
Nuclear decommissioning trusts 39 27
Other investments 86 97
Recurring | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 39 27
Other investments 11 11
Recurring | Private equity and other    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Hedge Funds and Similar Investments    
Assets    
Nuclear decommissioning trusts 76 0
Recurring | Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 76 0
Recurring | Equity securities    
Assets    
Nuclear decommissioning trusts 1,107 1,169
Other investments 68 55
Recurring | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 1,107 1,169
Other investments 20 16
Recurring | Fixed income securities    
Assets    
Nuclear decommissioning trusts 644 555
Other investments 7 8
Recurring | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 644 555
Other investments 0 0
Recurring | Level 1    
Assets    
Cash equivalents 4 438
Derivative assets    
Derivative assets, gross 273 99
Total assets 1,576 1,773
Liabilities    
Derivative liabilities, gross (177) (88)
Net Assets (Liabilities) at end of period 1,399 1,685
Recurring | Level 1 | DTE Electric    
Assets    
Cash equivalents 0 4
Derivative assets    
Total assets 1,169 1,107
Recurring | Level 1 | Current assets    
Derivative assets    
Total assets 227 532
Recurring | Level 1 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 4
Recurring | Level 1 | Noncurrent assets    
Derivative assets    
Total assets 1,349 1,241
Recurring | Level 1 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 1,169 1,103
Recurring | Level 1 | Current liabilities    
Liabilities    
Derivative liabilities, gross (168) (84)
Recurring | Level 1 | Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (9) (4)
Recurring | Level 1 | Natural Gas    
Derivative assets    
Derivative assets, gross 273 99
Liabilities    
Derivative liabilities, gross (177) (88)
Recurring | Level 1 | Electricity    
Derivative assets    
Derivative assets, gross 0 0
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Environmental & Other    
Derivative assets    
Derivative assets, gross 0 0
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 1 | Foreign currency exchange contracts    
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 39 27
Other investments 86 97
Recurring | Level 1 | Cash equivalents | DTE Electric    
Assets    
Nuclear decommissioning trusts 39 27
Other investments 11 11
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 | Hedge Funds and Similar Investments    
Assets    
Nuclear decommissioning trusts 58 0
Recurring | Level 1 | Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 58 0
Recurring | Level 1 | Equity securities    
Assets    
Nuclear decommissioning trusts 917 947
Other investments 68 55
Recurring | Level 1 | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 917 947
Other investments 20 16
Recurring | Level 1 | Fixed income securities    
Assets    
Nuclear decommissioning trusts 124 102
Other investments 7 8
Recurring | Level 1 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 124 102
Other investments 0 0
Recurring | Level 2    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 900 352
Total assets 1,336 723
Liabilities    
Derivative liabilities, gross (898) (327)
Net Assets (Liabilities) at end of period 438 396
Recurring | Level 2 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 436 371
Recurring | Level 2 | Current assets    
Derivative assets    
Total assets 646 260
Recurring | Level 2 | Current assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 2 | Noncurrent assets    
Derivative assets    
Total assets 690 463
Recurring | Level 2 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 436 371
Recurring | Level 2 | Current liabilities    
Liabilities    
Derivative liabilities, gross (609) (223)
Recurring | Level 2 | Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (289) (104)
Recurring | Level 2 | Natural Gas    
Derivative assets    
Derivative assets, gross 115 74
Liabilities    
Derivative liabilities, gross (172) (59)
Recurring | Level 2 | Electricity    
Derivative assets    
Derivative assets, gross 500 128
Liabilities    
Derivative liabilities, gross (434) (126)
Recurring | Level 2 | Environmental & Other    
Derivative assets    
Derivative assets, gross 285 150
Liabilities    
Derivative liabilities, gross (288) (137)
Recurring | Level 2 | Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, gross (4) (5)
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 | Hedge Funds and Similar Investments    
Assets    
Nuclear decommissioning trusts 18 0
Recurring | Level 2 | Hedge Funds and Similar Investments | DTE Electric    
Assets    
Nuclear decommissioning trusts 18 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 418 371
Other investments 0 0
Recurring | Level 2 | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 418 371
Other investments 0 0
Recurring | Level 3    
Assets    
Cash equivalents 0 0
Derivative assets    
Derivative assets, gross 218 116
Total assets 218 116
Liabilities    
Derivative liabilities, gross (433) (118)
Net Assets (Liabilities) at end of period (215) (2)
Recurring | Level 3 | DTE Electric    
Assets    
Cash equivalents 0 0
Derivative assets    
Total assets 9 4
Recurring | Level 3 | Current assets    
Derivative assets    
Total assets 166 92
Recurring | Level 3 | Current assets | DTE Electric    
Derivative assets    
Total assets 9 4
Recurring | Level 3 | Noncurrent assets    
Derivative assets    
Total assets 52 24
Recurring | Level 3 | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 0 0
Recurring | Level 3 | Current liabilities    
Liabilities    
Derivative liabilities, gross (260) (79)
Recurring | Level 3 | Noncurrent liabilities    
Liabilities    
Derivative liabilities, gross (173) (39)
Recurring | Level 3 | Natural Gas    
Derivative assets    
Derivative assets, gross 66 60
Liabilities    
Derivative liabilities, gross (245) (76)
Recurring | Level 3 | Electricity    
Derivative assets    
Derivative assets, gross 143 52
Liabilities    
Derivative liabilities, gross (188) (42)
Recurring | Level 3 | Environmental & Other    
Derivative assets    
Derivative assets, gross 9 4
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Foreign currency exchange contracts    
Liabilities    
Derivative liabilities, gross 0 0
Recurring | Level 3 | Derivative assets — FTRs | DTE Electric    
Derivative assets    
Derivative assets, net 9 4
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 | Hedge Funds and Similar Investments    
Assets    
Nuclear decommissioning trusts 0 0
Recurring | Level 3 | Hedge Funds and Similar Investments | 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
Other investments 0 0
Recurring | Other    
Derivative assets    
Total assets 497 408
Liabilities    
Net Assets (Liabilities) at end of period 497 408
Recurring | Other | DTE Electric    
Derivative assets    
Total assets 497 408
Recurring | Other | Noncurrent assets    
Derivative assets    
Total assets 497 408
Recurring | Other | Noncurrent assets | DTE Electric    
Derivative assets    
Total assets 497 408
Recurring | Other | Private equity and other    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Other | Private equity and other | DTE Electric    
Assets    
Nuclear decommissioning trusts 205 104
Recurring | Other | Equity securities    
Assets    
Nuclear decommissioning trusts 190 222
Recurring | Other | Equity securities | DTE Electric    
Assets    
Nuclear decommissioning trusts 190 222
Recurring | Other | Fixed income securities    
Assets    
Nuclear decommissioning trusts 102 82
Recurring | Other | Fixed income securities | DTE Electric    
Assets    
Nuclear decommissioning trusts $ 102 $ 82
v3.22.0.1
Fair Value (Details Textuals) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Nuclear decommissioning trusts | Fixed Income Securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Securities with no contractual maturity date $ 102  
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 $ 199 $ 183
Minimum | Equity or debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, redemption notice period 7 days  
Minimum | Private Equity and Other    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments classified as NAV assets, general contractual durations 7 years  
Maximum | Equity or debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments, redemption notice period 65 days  
Maximum | Private Equity and Other    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Investments classified as NAV assets, general contractual durations 12 years  
v3.22.0.1
Fair Value (Reconciliation of Level 3 Assets and Liabilities at Fair Value on a Recurring Basis) (Details) - Recurring - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Net Assets (Liabilities) as of January 1 $ (2) $ 4
Transfers from Level 3 into Level 2 0 (2)
Total gains (losses)    
Included in earnings (289) 31
Recorded in Regulatory liabilities 19 20
Purchases, issuances, and settlements:    
Settlements 57 (55)
Net Assets (Liabilities) as of December 31 (215) (2)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 (276) (4)
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 9 4
Natural Gas    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Net Assets (Liabilities) as of January 1 (16) (15)
Transfers from Level 3 into Level 2 0 (2)
Total gains (losses)    
Included in earnings (343) (75)
Recorded in Regulatory liabilities 0 0
Purchases, issuances, and settlements:    
Settlements 180 76
Net Assets (Liabilities) as of December 31 (179) (16)
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 (208) (4)
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 0 0
Electricity    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Net Assets (Liabilities) as of January 1 10 16
Transfers from Level 3 into Level 2 0 0
Total gains (losses)    
Included in earnings 54 113
Recorded in Regulatory liabilities 0 0
Purchases, issuances, and settlements:    
Settlements (109) (119)
Net Assets (Liabilities) as of December 31 (45) 10
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 4 70
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 0 0
Other    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Net Assets (Liabilities) as of January 1 4 3
Transfers from Level 3 into Level 2 0 0
Total gains (losses)    
Included in earnings 0 (7)
Recorded in Regulatory liabilities 19 20
Purchases, issuances, and settlements:    
Settlements (14) (12)
Net Assets (Liabilities) as of December 31 9 4
Total gains (losses) included in Net Income attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 (72) (70)
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 9 4
DTE Electric    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]    
Net Assets (Liabilities) as of January 1 4 3
Total gains (losses)    
Recorded in Regulatory liabilities 19 20
Purchases, issuances, and settlements:    
Settlements (14) (19)
Net Assets (Liabilities) as of December 31 9 4
Total gains (losses) included in Regulatory liabilities attributed to the change in unrealized gains (losses) related to assets and liabilities held at December 31 $ 9 $ 4
v3.22.0.1
Fair Value (Unobservable Inputs related to Level 3 Assets and Liabilities) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
$ / MWh
$ / MMBTU
Dec. 31, 2020
USD ($)
$ / MMBTU
$ / MWh
Unobservable Input Valuation Techniques [Line Items]    
Derivative Assets $ 1,391 $ 567
Derivative Liabilities (1,508) (533)
Natural Gas    
Unobservable Input Valuation Techniques [Line Items]    
Derivative Assets 454 233
Derivative Liabilities (594) (223)
Electricity    
Unobservable Input Valuation Techniques [Line Items]    
Derivative Assets 643 180
Derivative Liabilities $ (622) $ (168)
Level 3 | Discounted Cash Flow | Forward basis price | Natural Gas | Minimum    
Unobservable Input Valuation Techniques [Line Items]    
Forward basis price | $ / MMBTU (1.36) (0.86)
Level 3 | Discounted Cash Flow | Forward basis price | Natural Gas | Maximum    
Unobservable Input Valuation Techniques [Line Items]    
Forward basis price | $ / MMBTU 3.82 2.50
Level 3 | Discounted Cash Flow | Forward basis price | Natural Gas | Weighted Average    
Unobservable Input Valuation Techniques [Line Items]    
Forward basis price | $ / MMBTU (0.04) (0.07)
Level 3 | Discounted Cash Flow | Forward basis price | Electricity | Minimum    
Unobservable Input Valuation Techniques [Line Items]    
Forward basis price | $ / MWh (12) (9)
Level 3 | Discounted Cash Flow | Forward basis price | Electricity | Maximum    
Unobservable Input Valuation Techniques [Line Items]    
Forward basis price | $ / MWh 7 6
Level 3 | Discounted Cash Flow | Forward basis price | Electricity | Weighted Average    
Unobservable Input Valuation Techniques [Line Items]    
Forward basis price | $ / MWh (2) 0
Recurring | Level 3    
Unobservable Input Valuation Techniques [Line Items]    
Derivative Assets $ 218 $ 116
Derivative Liabilities (433) (118)
Recurring | Level 3 | Natural Gas    
Unobservable Input Valuation Techniques [Line Items]    
Derivative Assets 66 60
Derivative Liabilities (245) (76)
Recurring | Level 3 | Electricity    
Unobservable Input Valuation Techniques [Line Items]    
Derivative Assets 143 52
Derivative Liabilities $ (188) $ (42)
v3.22.0.1
Fair Value (Fair Value of Financial Instruments) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Carrying Amount    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable $ 150 $ 141
Short-term borrowings 758 38
Notes payable 27 19
Long-term debt 17,378 19,439
Carrying Amount | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 17 16
Short-term borrowings 153 0
Notes payable 27 17
Long-term debt 8,907 8,236
Carrying Amount | DTE Electric | Affiliated entity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings 53 101
Fair Value | Level 1    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 0 0
Notes payable 0 0
Long-term debt 2,284 2,547
Fair Value | Level 1 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 0 0
Notes payable 0 0
Long-term debt 0 0
Fair Value | Level 1 | DTE Electric | Affiliated entity    
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 0 0
Short-term borrowings 758 38
Notes payable 0 0
Long-term debt 15,425 18,230
Fair Value | Level 2 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 0 0
Short-term borrowings 153 0
Notes payable 0 0
Long-term debt 9,898 9,579
Fair Value | Level 2 | DTE Electric | Affiliated entity    
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 167 141
Short-term borrowings 0 0
Notes payable 27 19
Long-term debt 1,207 1,397
Fair Value | Level 3 | DTE Electric    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Notes receivable 17 16
Short-term borrowings 0 0
Notes payable 27 17
Long-term debt 150 379
Fair Value | Level 3 | DTE Electric | Affiliated entity    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Short-term borrowings $ 53 $ 101
v3.22.0.1
Fair Value (Fair Value of Nuclear Decommissioning Trust Fund Assets) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds $ 2,071 $ 1,855
DTE Electric    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 2,071 1,855
DTE Electric | Nuclear decommissioning trusts    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 2,071 1,855
DTE Electric | Nuclear decommissioning trusts | Fermi 2    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 2,051 1,841
DTE Electric | Nuclear decommissioning trusts | Fermi 1    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds 3 3
DTE Electric | Nuclear decommissioning trusts | Low-level radioactive waste    
Debt Securities, Available-for-sale [Line Items]    
Nuclear decommissioning trust funds $ 17 $ 11
v3.22.0.1
Fair Value (Gains and Losses and Proceeds from the Sale of Securities by the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - Nuclear decommissioning trusts - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Securities, Available-for-sale [Line Items]      
Realized gains $ 95 $ 192 $ 56
Realized losses (12) (111) (31)
Proceeds from sale of securities $ 1,047 $ 2,350 $ 788
v3.22.0.1
Fair Value (Fair Value and Unrealized Gains and Losses for the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]    
Fair Value $ 2,071 $ 1,855
Unrealized Gains 628 501
Unrealized Losses (25) (7)
Cash equivalents    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 39 27
Private Equity and Other    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 205 104
Unrealized Gains 58 11
Unrealized Losses (8) 0
Hedge Funds and Similar Investments    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 76 0
Unrealized Gains 1 0
Unrealized Losses (2) 0
Equity securities    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 1,107 1,169
Unrealized Gains 546 468
Unrealized Losses (9) (6)
Fixed Income Securities    
Debt Securities, Available-for-sale [Line Items]    
Fair Value 644 555
Unrealized Gains 23 22
Unrealized Losses $ (6) $ (1)
v3.22.0.1
Fair Value (Fair Value of Fixed Income Securities Held in Nuclear Decommissioning Trust Funds (Details) - Nuclear decommissioning trusts - Fixed Income Securities
$ in Millions
Dec. 31, 2021
USD ($)
Debt Securities, Available-for-sale [Line Items]  
Due within one year $ 20
Due after one through five years 135
Due after five through ten years 109
Due after ten years 278
Fixed income securities total $ 542
v3.22.0.1
Fair Value (Gains (Losses) Related to the Trust) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Rabbi Trust      
Schedule of Investments [Line Items]      
Gains (losses) related to the trust $ 7 $ (3) $ 37
Equity securities      
Schedule of Investments [Line Items]      
Gains (losses) related to the trust 7 (1) 27
Fixed Income Securities      
Schedule of Investments [Line Items]      
Gains (losses) related to the trust $ 0 $ (2) $ 10
v3.22.0.1
Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 1,391 $ 567
Derivative Liabilities (1,508) (533)
Current derivative asset    
Derivatives, Fair Value [Line Items]    
Derivative Assets 1,035 446
Noncurrent derivative asset    
Derivatives, Fair Value [Line Items]    
Derivative Assets 356 121
Current derivative liability    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (1,037) (386)
Noncurrent derivative liability    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (471) (147)
Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Liabilities (4) (5)
Natural gas    
Derivatives, Fair Value [Line Items]    
Derivative Assets 454 233
Derivative Liabilities (594) (223)
Electricity    
Derivatives, Fair Value [Line Items]    
Derivative Assets 643 180
Derivative Liabilities (622) (168)
Environmental & Other    
Derivatives, Fair Value [Line Items]    
Derivative Assets 294 154
Derivative Liabilities (288) (137)
Derivatives designated as hedging instruments | Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 0 0
Derivative Liabilities (4) (4)
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative Assets 1,391 567
Derivative Liabilities (1,504) (529)
Derivatives not designated as hedging instruments | Foreign currency exchange contracts    
Derivatives, Fair Value [Line Items]    
Derivative Assets 0 0
Derivative Liabilities 0 (1)
Derivatives not designated as hedging instruments | Natural gas    
Derivatives, Fair Value [Line Items]    
Derivative Assets 454 233
Derivative Liabilities (594) (223)
Derivatives not designated as hedging instruments | Electricity    
Derivatives, Fair Value [Line Items]    
Derivative Assets 643 180
Derivative Liabilities (622) (168)
Derivatives not designated as hedging instruments | Environmental & Other    
Derivatives, Fair Value [Line Items]    
Derivative Assets 294 154
Derivative Liabilities $ (288) $ (137)
v3.22.0.1
Financial and Other Derivative Instruments (Details Textuals) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 1,391 $ 567
Letters of credit that could be used to offset net derivative liabilities 18 7
Letters of credit that could be used to offset net derivative assets 37 9
Additional collateral, aggregate fair value 667  
Derivative net liability position aggregate fair value 1,300  
Collateral already posted fair value 8  
Derivative, net asset position, fair value 1,000  
Remaining amount of offsets to derivative net liability positions for hard and soft trigger provisions 232  
Derivatives not designated as hedging instruments    
Derivatives, Fair Value [Line Items]    
Derivative Assets 1,391 567
FTRs | Derivatives not designated as hedging instruments | DTE Electric | Other current assets    
Derivatives, Fair Value [Line Items]    
Derivative Assets $ 9 $ 4
v3.22.0.1
Financial and Other Derivative Instruments (Net Cash Collateral Offsetting Arrangements) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Cash collateral netted against Derivative assets $ (90) $ (12)
Cash collateral netted against Derivative liabilities 48 6
Cash collateral recorded in Accounts receivable 55 14
Cash collateral recorded in Accounts payable (21) (1)
Total net cash collateral posted (received) $ (8) $ 7
v3.22.0.1
Financial and Other Derivative Instruments (Netting Offsets of Derivative Assets and Liabilities) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) $ 1,391 $ 567
Gross Amounts Offset in the Consolidated Statements of Financial Position (1,120) (411)
Derivative assets, net 271 156
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (1,508) (533)
Gross Amounts Offset in the Consolidated Statements of Financial Position 1,078 405
Derivative liabilities, net (430) (128)
Natural gas    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 454 233
Gross Amounts Offset in the Consolidated Statements of Financial Position (394) (156)
Derivative assets, net 60 77
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (594) (223)
Gross Amounts Offset in the Consolidated Statements of Financial Position 347 151
Derivative liabilities, net (247) (72)
Electricity    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 643 180
Gross Amounts Offset in the Consolidated Statements of Financial Position (441) (120)
Derivative assets, net 202 60
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (622) (168)
Gross Amounts Offset in the Consolidated Statements of Financial Position 443 125
Derivative liabilities, net (179) (43)
Environmental & Other    
Derivative assets    
Gross Amounts of Recognized Assets (Liabilities) 294 154
Gross Amounts Offset in the Consolidated Statements of Financial Position (285) (135)
Derivative assets, net 9 19
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (288) (137)
Gross Amounts Offset in the Consolidated Statements of Financial Position 288 129
Derivative liabilities, net 0 (8)
Foreign currency exchange contracts    
Derivative liabilities    
Gross Amounts of Recognized Assets (Liabilities) (4) (5)
Gross Amounts Offset in the Consolidated Statements of Financial Position 0 0
Derivative liabilities, net $ (4) $ (5)
v3.22.0.1
Financial and Other Derivative Instruments (Netting Offsets Reconciliation to Balance Sheet) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivative Assets    
Derivative Assets $ 1,391 $ 567
Collateral adjustment (90) (12)
Derivative asset, current 181 116
Derivative assets, noncurrent 90 40
Derivative Liabilities    
Derivative Liabilities (1,508) (533)
Collateral adjustment 48 6
Derivative liabilities, current (238) (68)
Derivative liabilities, noncurrent (192) (60)
Current derivative asset    
Derivative Assets    
Derivative Assets 1,035 446
Counterparty netting (791) (318)
Collateral adjustment (63) (12)
Derivative asset, current 181 116
Noncurrent derivative asset    
Derivative Assets    
Derivative Assets 356 121
Counterparty netting (239) (81)
Collateral adjustment (27) 0
Derivative assets, noncurrent 90 40
Current derivative liability    
Derivative Liabilities    
Derivative Liabilities (1,037) (386)
Counterparty netting 791 318
Collateral adjustment 8 0
Derivative liabilities, current (238) (68)
Noncurrent derivative liability    
Derivative Liabilities    
Derivative Liabilities (471) (147)
Counterparty netting 239 81
Collateral adjustment 40 6
Derivative liabilities, noncurrent $ (192) $ (60)
v3.22.0.1
Financial and Other Derivative Instruments (Effect of Derivatives not Designated as Hedging Instruments on the Consolidated Statement of Operations) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income on Derivatives $ (184) $ (83) $ 55
Natural gas | Operating Revenues — Non-utility operations      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income on Derivatives (224) (70) 44
Natural gas | Fuel, purchased power, gas, and other — non-utility      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income on Derivatives (89) 20 (5)
Electricity | Operating Revenues — Non-utility operations      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income on Derivatives 169 91 44
Environmental & Other | Operating Revenues — Non-utility operations      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income on Derivatives (40) (118) (26)
Foreign currency exchange contracts | Operating Revenues — Non-utility operations      
Derivative Instruments, Gain (Loss) [Line Items]      
Gain (Loss) Recognized in Income on Derivatives $ 0 $ (6) $ (2)
v3.22.0.1
Financial and Other Derivative Instruments (Cumulative Gross Volume of Derivative Contracts Outstanding) (Details)
 12 Months Ended
Dec. 31, 2021
CAD ($)
MWh
MMBTU
T
Natural gas (MMBtu)  
Derivative [Line Items]  
Commodity, energy measure | MMBTU 2,139,606,569
Electricity (MWh)  
Derivative [Line Items]  
Commodity, energy measure 32,140,743
Foreign currency exchange ($ CAD)  
Derivative [Line Items]  
Commodity, monetary measure | $ $ 116,073,431
Renewable Energy Certificates (MWh)  
Derivative [Line Items]  
Commodity, energy measure 7,711,766
Carbon emissions (Metric Ton)  
Derivative [Line Items]  
Commodity, mass measure | T 1,142,009
v3.22.0.1
Long-Term Debt (Long Term Debt Outstanding and Weighted Average Interest Rates) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Long-term debt, total $ 17,517  
Mortgage Bonds, Notes and Other    
Debt Instrument [Line Items]    
Long-term debt, gross 16,608 $ 18,393
Unamortized debt discount (23) (25)
Unamortized debt issuance costs (90) (104)
Long-term debt due within one year (2,866) (462)
Mortgage bonds, notes, and other $ 13,629 17,802
Unsecured    
Debt Instrument [Line Items]    
Interest rate 2.10%  
Long-term debt, gross $ 5,555 8,175
Junior Subordinated Debentures    
Debt Instrument [Line Items]    
Interest rate 4.80%  
Long-term debt, gross $ 910 1,210
Unamortized debt issuance costs (27) (35)
Long-term debt, total 883 1,175
DTE Electric    
Debt Instrument [Line Items]    
Long-term debt due within one year (316) (462)
Mortgage bonds, notes, and other 8,591 7,774
Long-term debt, total 8,988  
DTE Electric | Mortgage Bonds, Notes and Other    
Debt Instrument [Line Items]    
Unamortized debt discount (19) (16)
Unamortized debt issuance costs (62) (56)
Mortgage bonds, notes, and other $ 8,591 7,774
DTE Electric | Principally Secured    
Debt Instrument [Line Items]    
Interest rate 3.70%  
Long-term debt, gross $ 8,988 8,308
DTE Gas | Principally Secured    
Debt Instrument [Line Items]    
Interest rate 3.90%  
Long-term debt, gross $ 2,065 $ 1,910
v3.22.0.1
Long-Term Debt (Debt Issuances) (Details) - USD ($)
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Nov. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Debt Instrument [Line Items]                
Amount $ 4,535,000,000   $ 4,535,000,000          
Redemption of long-term debt   $ 2,600,000,000 $ 3,522,000,000 $ 882,000,000 $ 821,000,000      
Senior Notes                
Debt Instrument [Line Items]                
Redemption of long-term debt   $ 2,600,000,000            
Junior Subordinated Debentures | November 2021, 4.38% Junior Subordinated Debentures Maturing in 2081                
Debt Instrument [Line Items]                
Interest Rate           4.375%    
Amount           $ 280,000,000    
Junior Subordinated Debentures | 2016, 6.00% Junior Subordinated Debentures Maturing in 2076                
Debt Instrument [Line Items]                
Interest Rate 6.00%   6.00%          
Redemption of long-term debt $ 280,000,000              
DTE Electric                
Debt Instrument [Line Items]                
Redemption of long-term debt     $ 321,000,000 $ 632,000,000 $ 0      
DTE Electric | Mortgage Bonds | March 2021 1.90% Mortgage Bonds Maturing in 2028                
Debt Instrument [Line Items]                
Interest Rate               1.90%
Amount               $ 575,000,000
DTE Electric | Mortgage Bonds | March 2021 3.25% Mortgage Bonds Maturing In 2051                
Debt Instrument [Line Items]                
Interest Rate               3.25%
Amount               $ 425,000,000
DT Midstream | June 2021 Variable Rate Term Loan Maturing in 2028                
Debt Instrument [Line Items]                
Amount             $ 1,000,000,000  
DT Midstream | Senior Notes                
Debt Instrument [Line Items]                
Amount             $ 2,100,000,000  
DT Midstream | Senior Notes | June 2021 4.125% Senior Notes Maturing in 2029                
Debt Instrument [Line Items]                
Interest Rate             4.125%  
Amount             $ 1,100,000,000  
DT Midstream | Senior Notes | June 2021 4.375% Senior Notes Maturing in 2031                
Debt Instrument [Line Items]                
Interest Rate             4.375%  
Amount             $ 1,000,000,000  
DTE Gas | Mortgage Bonds | November 2021 2.07% Mortgage Bonds Maturing in 2031                
Debt Instrument [Line Items]                
Interest Rate           2.07%    
Amount           $ 60,000,000    
DTE Gas | Mortgage Bonds | November 2021 2.85% Mortgage Bonds Maturing in 2051                
Debt Instrument [Line Items]                
Interest Rate           2.85%    
Amount           $ 95,000,000    
v3.22.0.1
Long-Term Debt (Details Textuals)
$ / shares in Units, shares in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Feb. 01, 2020
$ / shares
Nov. 01, 2019
USD ($)
$ / shares
Jul. 31, 2021
day
$ / shares
Sep. 30, 2021
USD ($)
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Nov. 30, 2022
shares
Debt Instrument [Line Items]                
Face amount         $ 4,535,000,000      
Redemption of long-term debt       $ 2,600,000,000 3,522,000,000 $ 882,000,000 $ 821,000,000  
Prepayment costs for extinguishment of long-term debt         $ 361,000,000 0 0  
Equity units, face amount of attached debt instrument   $ 1,000            
Financial instruments subject to mandatory redemption, settlement terms, share value, amount             150,000,000  
Senior Notes                
Debt Instrument [Line Items]                
Redemption of long-term debt       2,600,000,000        
Prepayment costs for extinguishment of long-term debt       361,000,000        
Write off of unamortized issuance costs and discounts       $ 15,000,000        
Equity units subject to mandatory redemption                
Debt Instrument [Line Items]                
Forward contract indexed to issuer's equity, forward rate per share (in dollars per share) | $ / shares $ 50 $ 50            
Equity units, percentage interest in attached debt instrument   0.005%            
Financial instruments subject to mandatory redemption, settlement terms, share value, amount   $ 150,000,000            
Financial instruments subject to mandatory redemption, contract adjustment rate 4.00% 4.00%            
Financial instruments subject to mandatory redemption, contract adjustment rate, annual amount (in dollars per share) | $ / shares $ 2              
Financial instruments subject to mandatory redemption, settlement terms, maximum number of shares (in shares) | shares         13.0      
Equity units subject to mandatory redemption | Minimum | Forecast                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, settlement terms, number of shares (in shares) | shares               9.8
Equity units subject to mandatory redemption | Maximum | Forecast                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, settlement terms, number of shares (in shares) | shares               12.2
Equal to or greater than $133.08, 0.3757 shares of common stock | Equity units subject to mandatory redemption                
Debt Instrument [Line Items]                
Number of consecutive scheduled trading days | day     20          
Financial instruments subject to mandatory redemption, anti-dilution provision, conversion ratio     0.3757          
Equal to or greater than $133.08, 0.3757 shares of common stock | Equity units subject to mandatory redemption | Minimum                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, anti-dilution provision, stock price threshold (in dollars per share) | $ / shares     $ 133.08          
Less than $133.08, but greater than $106.50, number of shares of common stock equal to $50 divided by the AMV | Equity units subject to mandatory redemption                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, anti-dilution provision, conversion ratio     50          
Less than $133.08, but greater than $106.50, number of shares of common stock equal to $50 divided by the AMV | Equity units subject to mandatory redemption | Maximum                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, anti-dilution provision, stock price threshold (in dollars per share) | $ / shares     $ 133.08          
Less than or equal to $106.50, 0.4695 shares of common stock | Equity units subject to mandatory redemption                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, anti-dilution provision, conversion ratio     0.4695          
Less than or equal to $106.50, 0.4695 shares of common stock | Equity units subject to mandatory redemption | Maximum                
Debt Instrument [Line Items]                
Financial instruments subject to mandatory redemption, anti-dilution provision, stock price threshold (in dollars per share) | $ / shares     $ 106.50          
November 2019 Series F 2.25% RSNs Maturing 2025 | Equity Units                
Debt Instrument [Line Items]                
Face amount   $ 1,300,000,000            
Interest rate   2.25%            
November 2019 Series F 2.25% RSNs Maturing 2025 | Unsuccessful remarketing | Equity Units                
Debt Instrument [Line Items]                
Debt instrument, redemption price, percentage   100.00%            
DTE Electric                
Debt Instrument [Line Items]                
Redemption of long-term debt         $ 321,000,000 $ 632,000,000 $ 0  
DTE Electric | 1.45% Revenue Bonds Maturing in 2030 | Tax-Exempt Revenue Bonds                
Debt Instrument [Line Items]                
Face amount         $ 82,000,000      
Interest rate       1.45% 1.45%      
DTE Electric | 1.35% Revenue Bonds Maturing in 2029 | Tax-Exempt Revenue Bonds                
Debt Instrument [Line Items]                
Face amount         $ 59,000,000      
Interest rate       1.45% 1.35%      
v3.22.0.1
Long-Term Debt (Debt Redemptions) (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2021
Aug. 31, 2021
Jul. 31, 2021
Jun. 30, 2021
May 31, 2021
Apr. 30, 2021
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument, Redemption [Line Items]                    
Amount             $ 2,600 $ 3,522 $ 882 $ 821
Loss on extinguishment of debt             376 393 6 0
Junior Subordinated Debentures                    
Debt Instrument, Redemption [Line Items]                    
Loss on extinguishment of debt               $ 17    
Junior Subordinated Debentures | 5.375% Junior Subordinated Debentures Maturing in 2076                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate       5.375%            
Amount       $ 300            
Loss on extinguishment of debt       $ 8            
Junior Subordinated Debentures | 2016, 6.00% Junior Subordinated Debentures Maturing in 2076                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate 6.00%             6.00%    
Amount $ 280                  
Loss on extinguishment of debt $ 9                  
Senior Notes                    
Debt Instrument, Redemption [Line Items]                    
Amount             $ 2,600      
Senior Notes | 3.30% Senior Notes Maturing in 2022                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate     3.30%              
Amount     $ 300              
Senior Notes | 2.60% Senior Notes Maturing in 2022                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate     2.60%              
Amount     $ 300              
Senior Notes | 3.70% Senior Notes Maturing in2023                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate     3.70%              
Amount     $ 600              
Senior Notes | 3.85% Senior Notes Maturing in 2023                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate   3.85% 3.85%              
Amount   $ 165 $ 135              
Senior Notes | 3.50% Senior Notes Maturing in 2024                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate     3.50%              
Amount     $ 350              
Senior Notes | 3.80% Senior Notes Maturing in 2027                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate     3.80%              
Amount     $ 350              
Senior Notes | 3.40% Senior Notes Maturing in 2029                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate     3.40%              
Amount     $ 21              
Senior Notes | 6.375% Senior Notes Maturing in 2033                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate   6.375% 6.375%              
Amount   $ 209 $ 191              
DTE Electric                    
Debt Instrument, Redemption [Line Items]                    
Amount               $ 321 $ 632 $ 0
DTE Electric | Mortgage Bonds | 3.90% Mortgage Bonds Maturing in 2021                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate           3.90%        
Amount           $ 250        
DTE Electric | Mortgage Bonds | 7.00% Mortgage Bonds Maturing in 2021                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate         7.00%          
Amount         $ 33          
DTE Electric | Mortgage Bonds | 6.90% Senior Notes Maturing in 2021                    
Debt Instrument, Redemption [Line Items]                    
Interest Rate   6.90%                
Amount   $ 38                
v3.22.0.1
Long-Term Debt (Scheduled Debt Maturities) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Maturities of Long-term Debt [Abstract]  
2022 $ 2,866
2023 277
2024 1,075
2025 1,220
2026 777
2027 and Thereafter 11,302
Long-term debt, total 17,517
DTE Electric  
Maturities of Long-term Debt [Abstract]  
2022 316
2023 202
2024 400
2025 350
2026 177
2027 and Thereafter 7,543
Long-term debt, total $ 8,988
v3.22.0.1
Long-Term Debt (Scheduled Interest Payments) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Debt Instrument [Line Items]  
2022 $ 575
2023 548
2024 529
2025 494
2026 450
2027 and Thereafter 7,510
Total 10,106
DTE Electric  
Debt Instrument [Line Items]  
2022 330
2023 322
2024 305
2025 292
2026 284
2027 and Thereafter 4,222
Total $ 5,755
v3.22.0.1
Long-Term Debt (Equity Units) (Details) - USD ($)
shares in Millions
 12 Months Ended
Feb. 01, 2020
Nov. 01, 2019
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]          
Total Net Proceeds   $ 1,265,000,000 $ 0 $ 0 $ 1,265,000,000
Total Long-Term Debt     4,535,000,000    
Equity units subject to mandatory redemption          
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]          
Units Issued (in shares)   26      
Stock Purchase Contract Annual Rate 4.00% 4.00%      
Stock Purchase Contract Liability   $ 150,000,000 51,000,000 101,000,000  
Payments     $ 50,000,000 $ 49,000,000  
November 2019 Equity Units Maturing 2025 | Equity Units          
Financial Instruments Subject to Mandatory Redemption by Settlement Terms [Line Items]          
Total Long-Term Debt   $ 1,300,000,000      
RSN Annual Interest Rate   2.25%      
v3.22.0.1
Preferred and Preference Securities (Details)
Dec. 31, 2021
$ / shares
shares
DTE Electric  
Preferred and Preferenced Securities [Line Items]  
Preferred stock, par value (in dollars per share) | $ / shares $ 100
Preferred stock, shares authorized (in shares) | shares 6,747,484
Preference stock, par value (in dollars per share) | $ / shares $ 1
Preference stock shares authorized (in shares) | shares 30,000,000
DTE Gas  
Preferred and Preferenced Securities [Line Items]  
Preferred stock, par value (in dollars per share) | $ / shares $ 1
Preferred stock, shares authorized (in shares) | shares 7,000,000
Preference stock, par value (in dollars per share) | $ / shares $ 1
Preference stock shares authorized (in shares) | shares 4,000,000
DTE Energy  
Preferred and Preferenced Securities [Line Items]  
Preferred stock, par value (in dollars per share) | $ / shares $ 0
Preferred stock, shares authorized (in shares) | shares 5,000,000
v3.22.0.1
Short-Term Credit Arrangements and Borrowings (Details Textuals)
Dec. 31, 2021
USD ($)
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
USD ($)
Short-term Debt [Line Items]        
Face amount $ 4,535,000,000      
Amount outstanding $ 758,000,000     $ 38,000,000
Weighted average interest rate 0.30%     1.10%
Dividend restriction $ 1,400,000,000      
Retained earnings 3,438,000,000     $ 7,156,000,000
Effective limitations $ 0      
DTE Electric        
Short-term Debt [Line Items]        
Total funded debt to capitalization ratio 0.51      
Weighted average interest rate 0.20%      
Short-term borrowings $ 153,000,000     0
Retained earnings $ 2,901,000,000     2,623,000,000
DTE Gas        
Short-term Debt [Line Items]        
Total funded debt to capitalization ratio 0.48      
DTE Energy        
Short-term Debt [Line Items]        
Total funded debt to capitalization ratio 0.66      
DTE Energy | Demand financing agreement        
Short-term Debt [Line Items]        
Maximum borrowing capacity $ 250,000,000      
Amount outstanding 103,000,000     $ 49,000,000
Maximum        
Short-term Debt [Line Items]        
Total funded debt to capitalization ratio   0.70 0.65  
Unsecured term loan, expiring June 2022 | Unsecured term loan        
Short-term Debt [Line Items]        
Face amount 400,000,000      
Amount outstanding 0      
Demand financing agreement, indefinite term | DTE Energy | Demand financing agreement        
Short-term Debt [Line Items]        
Maximum borrowing capacity 50,000,000      
Additional margin financing 50,000,000      
Demand financing agreement, expiring in 2022 | DTE Energy | Demand financing agreement        
Short-term Debt [Line Items]        
Maximum borrowing capacity $ 150,000,000      
v3.22.0.1
Short-Term Credit Arrangements and Borrowings (Schedule of Borrowings) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 3,057
Amounts outstanding 1,016
Net availability 2,041
DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 500
Amounts outstanding 153
Net availability 347
DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 300
Amounts outstanding 210
Net availability 90
DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 2,257
Amounts outstanding 653
Net availability 1,604
Revolving credit facility  
Line Of Credit Facility [Line Items]  
Amounts outstanding 75
Revolving credit facility | DTE Electric  
Line Of Credit Facility [Line Items]  
Amounts outstanding 0
Revolving credit facility | DTE Gas  
Line Of Credit Facility [Line Items]  
Amounts outstanding 0
Revolving credit facility | DTE Energy  
Line Of Credit Facility [Line Items]  
Amounts outstanding 75
Revolving credit facility | Unsecured revolving credit facility, expiring April 2025  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 2,300
Revolving credit facility | Unsecured revolving credit facility, expiring April 2025 | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 500
Revolving credit facility | Unsecured revolving credit facility, expiring April 2025 | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 300
Revolving credit facility | Unsecured revolving credit facility, expiring April 2025 | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 1,500
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 87
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023 | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023 | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Revolving credit facility | Unsecured Canadian revolving credit facility, expiring May 2023 | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 87
Revolving credit facility | Unsecured revolving credit facility expiring in April 2024  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 102
Revolving credit facility | Unsecured revolving credit facility expiring in April 2024 | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 22
Revolving credit facility | Unsecured revolving credit facility expiring in April 2024 | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 13
Revolving credit facility | Unsecured revolving credit facility expiring in April 2024 | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 67
Unsecured term loan | Unsecured term loan, expiring June 2022  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 400
Unsecured term loan | Unsecured term loan, expiring June 2022 | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring June 2022 | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Unsecured term loan | Unsecured term loan, expiring June 2022 | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 400
Letters of credit  
Line Of Credit Facility [Line Items]  
Amounts outstanding 258
Letters of credit | DTE Electric  
Line Of Credit Facility [Line Items]  
Amounts outstanding 0
Letters of credit | DTE Gas  
Line Of Credit Facility [Line Items]  
Amounts outstanding 0
Letters of credit | DTE Energy  
Line Of Credit Facility [Line Items]  
Amounts outstanding 258
Letters of credit | Unsecured letter of credit facility, expiring February 2023  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 150
Letters of credit | Unsecured letter of credit facility, expiring February 2023 | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring February 2023 | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring February 2023 | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 150
Letters of credit | Unsecured letter of credit facility, expiring July 2023  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 70
Letters of credit | Unsecured letter of credit facility, expiring July 2023 | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring July 2023 | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility, expiring July 2023 | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 70
Letters of credit | Unsecured letter of credit facility  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 50
Letters of credit | Unsecured letter of credit facility | DTE Electric  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility | DTE Gas  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 0
Letters of credit | Unsecured letter of credit facility | DTE Energy  
Line Of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity 50
Commercial paper issuances  
Line Of Credit Facility [Line Items]  
Amounts outstanding 683
Commercial paper issuances | DTE Electric  
Line Of Credit Facility [Line Items]  
Amounts outstanding 153
Commercial paper issuances | DTE Gas  
Line Of Credit Facility [Line Items]  
Amounts outstanding 210
Commercial paper issuances | DTE Energy  
Line Of Credit Facility [Line Items]  
Amounts outstanding $ 320
v3.22.0.1
Leases (Details Textuals) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]        
Additional net investment in finance leases $ 31      
Depreciation expense associated with property under operating leases   $ 22 $ 24 $ 23
Interest income recognized under finance leases   17 $ 16 $ 5
Profit from the sale of membership interests   $ 11    
Minimum        
Lessee, Lease, Description [Line Items]        
Lease terms   2 years    
Term of operating lease contracts   2 years    
Maximum        
Lessee, Lease, Description [Line Items]        
Lease terms   40 years    
Term of operating lease contracts   24 years    
DTE Electric | Minimum        
Lessee, Lease, Description [Line Items]        
Lease terms   2 years    
DTE Electric | Maximum        
Lessee, Lease, Description [Line Items]        
Lease terms   40 years    
v3.22.0.1
Leases (Components of Lease Cost) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lessee, Lease, Description [Line Items]      
Operating lease cost $ 19 $ 21 $ 23
Finance lease cost:      
Amortization of right-of-use assets 7 5 4
Interest of lease liabilities 1 0 0
Total finance lease cost 8 5 4
Variable lease cost 9 10 10
Short-term lease cost 14 11 9
Total lease cost 50 47 46
DTE Electric      
Lessee, Lease, Description [Line Items]      
Operating lease cost 14 14 17
Finance lease cost:      
Amortization of right-of-use assets 6 4 4
Interest of lease liabilities 0 0 0
Total finance lease cost 6 4 4
Variable lease cost 0 0 0
Short-term lease cost 6 6 3
Total lease cost $ 26 $ 24 $ 24
v3.22.0.1
Leases (Other Information) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Cash paid for amounts included in the measurement of these liabilities:      
Operating cash flows for finance leases $ 8 $ 3 $ 5
Operating cash flows for operating leases 19 22 22
Right-of-use assets obtained in exchange for lease obligations:      
Operating leases 5 2 42
Finance leases $ 3 $ 19 $ 8
Weighted Average Remaining Lease Term (Years)      
Operating leases 12 years 8 months 12 days 12 years 1 month 6 days 12 years 1 month 6 days
Finance leases 7 years 9 months 18 days 7 years 7 months 6 days 9 years 1 month 6 days
Weighted Average Discount Rate      
Operating leases 3.60% 3.60% 3.50%
Finance leases 2.20% 2.00% 3.10%
DTE Electric      
Cash paid for amounts included in the measurement of these liabilities:      
Operating cash flows for finance leases $ 7 $ 2 $ 5
Operating cash flows for operating leases 14 14 16
Right-of-use assets obtained in exchange for lease obligations:      
Operating leases 1 0 27
Finance leases $ 1 $ 14 $ 0
Weighted Average Remaining Lease Term (Years)      
Operating leases 10 years 3 months 18 days 10 years 4 months 24 days 10 years 7 months 6 days
Finance leases 2 years 1 month 6 days 3 years 1 month 6 days 2 years
Weighted Average Discount Rate      
Operating leases 3.40% 3.30% 3.30%
Finance leases 1.00% 1.00% 3.10%
v3.22.0.1
Leases (Future Minimum Lease Payments) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Operating Leases  
2022 $ 16
2023 13
2024 11
2025 8
2026 7
2027 and thereafter 56
Total future minimum lease payments 111
Imputed interest (23)
Lease liabilities 88
Finance Leases  
2022 8
2023 9
2024 3
2025 1
2026 1
2027 and thereafter 8
Total future minimum lease payments 30
Imputed interest (3)
Lease liabilities 27
DTE Electric  
Operating Leases  
2022 12
2023 10
2024 8
2025 6
2026 5
2027 and thereafter 27
Total future minimum lease payments 68
Imputed interest (12)
Lease liabilities 56
Finance Leases  
2022 6
2023 6
2024 1
2025 0
2026 0
2027 and thereafter 0
Total future minimum lease payments 13
Imputed interest 0
Lease liabilities $ 13
v3.22.0.1
Leases (Finance Leases Reported on Consolidated Statements of Financial Position) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Lessee, Lease, Description [Line Items]    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Right-of-use assets, within Property, plant, and equipment, net $ 26 $ 29
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Long-term Debt and Lease Obligation, Current Long-term Debt and Lease Obligation, Current
Current lease liabilities, within Current portion of long-term debt $ 8 $ 7
Long-term lease liabilities $ 19 $ 24
DTE Electric    
Lessee, Lease, Description [Line Items]    
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, Plant and Equipment, Net Property, Plant and Equipment, Net
Right-of-use assets, within Property, plant, and equipment, net $ 12 $ 16
Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Long-term Debt and Lease Obligation, Current Long-term Debt and Lease Obligation, Current
Current lease liabilities, within Current portion of long-term debt $ 6 $ 6
Long-term lease liabilities $ 7 $ 13
v3.22.0.1
Leases (Lease Income Associated with Operating Leases) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Lessor, Lease, Description [Line Items]      
Fixed payments $ 67 $ 57 $ 56
Variable payments 131 124 128
Total lease income under operating leases 198 181 184
Operating Revenues      
Lessor, Lease, Description [Line Items]      
Total lease income under operating leases 103 99 121
Other Income      
Lessor, Lease, Description [Line Items]      
Total lease income under operating leases $ 95 $ 82 $ 63
v3.22.0.1
Leases (Minimum Future Rental Revenues under Operating Leases) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Leases [Abstract]  
2022 $ 15
2023 15
2024 15
2025 15
2026 11
2027 and thereafter 51
Total minimum future rental revenues under operating leases $ 122
v3.22.0.1
Leases (Property under Operating Leases) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Leases [Abstract]    
Gross property under operating leases $ 341 $ 389
Accumulated amortization of property under operating leases $ 181 $ 191
v3.22.0.1
Leases (Components of Net Investment in Finance Leases) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Leases [Abstract]  
2022 $ 23
2023 22
2024 22
2025 21
2026 21
2027 and thereafter 271
Total minimum future lease receipts 380
Residual value of leased pipeline 17
Less unearned income 198
Net investment in finance lease 199
Less current portion 6
Net investment in finance lease, noncurrent $ 193
v3.22.0.1
Commitments and Contingencies (Details Textuals)
 1 Months Ended 12 Months Ended
Jun. 30, 2020
Dec. 31, 2021
USD ($)
employee
facility
site
Dec. 31, 2020
USD ($)
Loss Contingencies [Line Items]      
Utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees estimated for next year   $ 3,700,000,000  
Labor force concentration risk | Workforce subject to collective bargaining arrangements      
Loss Contingencies [Line Items]      
Approximate number of employees | employee   5,200  
Percentage of total employees   50.00%  
Labor force concentration risk | Workforce subject to collective bargaining arrangements expiring within one year      
Loss Contingencies [Line Items]      
Percentage of total employees   15.00%  
Synthetic fuel guarantees      
Loss Contingencies [Line Items]      
Number of days after expiration of statutes of limitations   90 days  
Maximum potential liability   $ 70,000,000  
Reduced emissions fuel guarantees      
Loss Contingencies [Line Items]      
Number of days after expiration of statutes of limitations   90 days  
Maximum potential liability   $ 720,000,000  
Other guarantees      
Loss Contingencies [Line Items]      
Maximum potential liability   40,000,000  
Performance surety bonds      
Loss Contingencies [Line Items]      
Performance bonds outstanding   168,000,000  
DTE Electric      
Loss Contingencies [Line Items]      
Environmental capital expenditures   2,400,000,000  
Estimated capital expenditures   $ 0  
Number of former MGP sites | site   3  
Accrued for remediation related to the sites   $ 14,000,000 $ 10,000,000
Number of permitted engineered coal ash storage facilities owned | facility   3  
Utility capital expenditures, expenditures for non-utility businesses, and contributions to equity method investees estimated for next year   $ 2,700,000,000  
DTE Electric | Labor force concentration risk | Workforce subject to collective bargaining arrangements      
Loss Contingencies [Line Items]      
Approximate number of employees | employee   2,700  
Percentage of total employees   57.00%  
DTE Electric | Labor force concentration risk | Workforce subject to collective bargaining arrangements expiring within one year      
Loss Contingencies [Line Items]      
Percentage of total employees   21.00%  
DTE Electric | Performance surety bonds      
Loss Contingencies [Line Items]      
Performance bonds outstanding   $ 119,000,000  
DTE Gas      
Loss Contingencies [Line Items]      
Number of former MGP sites | site   14  
Accrued for remediation related to the sites   $ 24,000,000 $ 24,000,000
Amortization period for MGP costs (in years)   10 years  
DTE Gas | Cleanup completed and site closed      
Loss Contingencies [Line Items]      
Number of former MGP sites | site   8  
DTE Gas | Partial closure completed      
Loss Contingencies [Line Items]      
Number of former MGP sites | site   4  
Reduction of Carbon Emissions by 2023      
Loss Contingencies [Line Items]      
Goal to reduce carbon emissions, percentage   32.00%  
Reduction of Carbon Emissions by 2028      
Loss Contingencies [Line Items]      
Goal to reduce carbon emissions, percentage   50.00%  
Reduction of Carbon Emissions by 2040      
Loss Contingencies [Line Items]      
Goal to reduce carbon emissions, percentage   80.00%  
Reduction of Carbon Emissions by 2050 | DTE Electric      
Loss Contingencies [Line Items]      
Goal of net carbon emissions, percentage   0.00%  
CCR and ELG Rules | DTE Electric      
Loss Contingencies [Line Items]      
Estimated impact of the CCR and ELG rules   $ 522,000,000  
Estimated impact of the CCR and ELG rules for 2022 through 2026   $ 417,000,000  
Reduction of Greenhouse Gas Emissions by 2050 | DTE Gas      
Loss Contingencies [Line Items]      
Goal to reduce net greenhouse gas emissions, percentage 0.00%    
Reduction of Emissions from Natural Gas by 2050 | DTE Gas      
Loss Contingencies [Line Items]      
Goal to reduce emissions from natural gas 35.00%    
v3.22.0.1
Commitments and Contingencies (Purchase Commitments) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 $ 3,290
2023 1,796
2024 1,277
2025 585
2026 460
2027 and thereafter 1,966
Total 9,374
Long-term power purchase agreements  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 87
2023 92
2024 103
2025 103
2026 103
2027 and thereafter 986
Total 1,474
Other purchase commitments  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 3,203
2023 1,704
2024 1,174
2025 482
2026 357
2027 and thereafter 980
Total 7,900
DTE Electric  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 457
2023 499
2024 539
2025 305
2026 227
2027 and thereafter 1,281
Total 3,308
DTE Electric | Long-term power purchase agreements  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 92
2023 97
2024 108
2025 108
2026 109
2027 and thereafter 1,006
Total 1,520
DTE Electric | Other purchase commitments  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
2022 365
2023 402
2024 431
2025 197
2026 118
2027 and thereafter 275
Total $ 1,788
DTE Electric | Minimum  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
Share of plant output 28.00%
DTE Electric | Maximum  
Purchase Obligation, Fiscal Year Maturity [Abstract]  
Share of plant output 100.00%
v3.22.0.1
Nuclear Operations (Details) - DTE Electric
$ in Millions
 4 Months Ended 12 Months Ended
May 16, 2014
kWh
May 15, 2014
$ / MWh
Dec. 31, 2021
USD ($)
Entity Information [Line Items]      
Policy waiting period     84 days
Insurance coverage for extra expense when power plant unavailable     $ 490
Period of coverage of policy for extra expenses     3 years
Primary coverage for stabilization, decontamination, debris removal, repair and/or replacement of property, and decommissioning     $ 1,500
Excess coverage for stabilization, decontamination, debris removal, repair and/or replacement of property, and decommissioning     1,250
Combined coverage limit for total property damage     2,750
Total limit for property damage for non-nuclear events     1,800
Limit of coverage for aggregate extra expenses for non-nuclear events     $ 328
Period of coverage for extra expenses     2 years
Time period for TRIA after the first loss from terrorism     1 year
NEIL policies against terrorism loss, amount made available to all insured entities (up to)     $ 3,200
Maximum assessment if loss amount exceeds funds available     57
Public liability insurance for a nuclear incident     450
One industry aggregate limit of coverage arising from terrorist act outside scope of TRIA     300
Maximum deferred premium charges that could be levied against each licensed nuclear facility     138
Limit of deferred premium charges per year per facility     $ 20
Company obligated to pay DOE fee of Fermi 2 electricity generated and sold (in dollars per MWh) | $ / MWh   1  
New DOE fee for Fermi 2 electricity generated and sold (KWh) | kWh 0    
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Pension Cost Inclusions) (Details) - Pension plan - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) [Abstract]      
Service cost $ 108 $ 99 $ 84
Interest cost 158 186 219
Expected return on plan assets (339) (334) (325)
Amortization of:      
Net actuarial loss 196 171 131
Prior service cost 0 1 1
Settlements 16 25 2
Net pension cost/other postretirement cost (credit) $ 139 $ 148 $ 112
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Other Changes in Plan Assets and Benefit Obligations recognized in Reg Assets and OCI) (Details) - Pension plan - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Other changes in plan assets and benefit obligations recognized in Regulatory assets and Other comprehensive income (loss)    
Net actuarial (gain) loss $ (376) $ 137
Amortization of net actuarial loss (209) (193)
Prior service credit (cost) 4 0
Amortization of prior service cost (3) (1)
Total recognized in Regulatory assets and Other comprehensive income (loss) (584) (57)
Total recognized in net periodic pension cost, Regulatory assets, and Other comprehensive income (loss) $ (445) $ 91
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Reconciliation of Obligations, Assets and Funded Status of Plans) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in projected benefit obligation      
Plan amendments $ 4 $ 0  
Amounts recognized in Regulatory assets      
Regulatory assets 3,677 4,254  
Pension plan      
Defined Benefit Plans and Other Postretirement Benefit Plans [Line Items]      
Accumulated benefit obligation, end of year 5,448 5,843  
Change in projected benefit obligation      
Projected/Accumulated postretirement benefit obligation, beginning of year 6,304 5,810  
Service cost 108 99 $ 84
Interest cost 158 186 219
Actuarial (gain) loss (255) 619  
Special termination benefits 0 3  
Benefits paid (414) (353)  
Settlements (48) (60)  
Projected/Accumulated postretirement benefit obligation, end of year 5,857 6,304 5,810
Change in plan assets      
Plan assets at fair value, beginning of year 5,497 4,993  
Actual return on plan assets 460 815  
Company contributions 12 102  
Benefits paid (414) (353)  
Settlements (48) (60)  
Plan assets at fair value, end of year 5,507 5,497 $ 4,993
Funded status (350) (807)  
Amount recorded as:      
Current liabilities (11) (10)  
Noncurrent liabilities (339) (797)  
Defined benefit plans liabilities (350) (807)  
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax      
Net actuarial loss 126 142  
Prior service cost 1 3  
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax 127 145  
Amounts recognized in Regulatory assets      
Net actuarial loss 1,381 1,949  
Prior service credit (9) (11)  
Regulatory assets $ 1,372 $ 1,938  
v3.22.0.1
Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Annual contributions per employee, percentage   4.00%    
Defined contribution plan cost   $ 70 $ 73 $ 65
DTE Electric        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Defined contribution plan cost   $ 34 34 31
DTE Gas        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Annual contributions per employee, percentage   8.00%    
Pension plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Company contributions   $ 12 102  
Expected return on plan assets for next fiscal year   6.80%    
Pension plan | Qualified Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Company contributions   $ 0 92 150
Pension plan | DTE Electric        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Allocated pension benefit costs   107 106 93
Pension plan | DTE Electric | Qualified Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Company contributions   0 $ 60 $ 100
Pension plan | Maximum | Qualified Plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Estimated future employer contributions in next fiscal year   $ 7    
Pension plan | Maximum | DTE Electric | Qualified Plan | Forecast        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Pension funds transferred to (from) plan $ 50      
Pension plan | Maximum | DTE Gas | Qualified Plan | Forecast        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Pension funds transferred to (from) plan $ (50)      
Other postretirement benefit plan        
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]        
Expected return on plan assets for next fiscal year   6.40%    
Retiree health care allowance will increase at lower of the rate of medical inflation or a set percentage   2.00%    
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Contributions) (Details) - Pension Plan - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Cash contributions to qualified pension plans $ 12 $ 102  
Qualified Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Cash contributions to qualified pension plans 0 92 $ 150
Qualified Plan | DTE Electric      
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]      
Cash contributions to qualified pension plans $ 0 $ 60 $ 100
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Benefits related to Qualified and Nonqualified Pension Plans Expected to be paid in the Next Ten Years) (Details) - Pension plan
$ in Millions
Dec. 31, 2021
USD ($)
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2022 $ 346
2023 360
2024 341
2025 350
2026 346
2027-2031 1,723
Total $ 3,466
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Assumptions used in Determining the PBO and Net Pension Costs) (Details) - Pension plan
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Projected benefit obligation      
Discount rate 2.91% 2.57% 3.28%
Rate of compensation increase 3.80% 3.80% 3.85%
Cash balance interest crediting rate 2.40% 2.00% 3.30%
Net pension costs      
Discount rate 2.57% 3.28% 4.40%
Rate of compensation increase 3.80% 3.85% 3.85%
Expected long-term rate of return on plan assets 7.00% 7.10% 7.30%
Cash balance interest crediting rate 2.00% 3.30% 3.70%
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Target Allocations of Plan Assets) (Details) - Pension plan
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 100.00%
U.S. Large Capitalization (Cap) Equity Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 13.00%
U.S. Small Cap and Mid Cap Equity Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 3.00%
Non-U.S. Equity Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 13.00%
Fixed Income Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 48.00%
Hedge Funds and Similar Investments  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 11.00%
Private Equity and Other  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 12.00%
v3.22.0.1
Retirement Benefits and Trusteed Assets (Pension Plan - Fair Value Measurements) (Details) - Pension Plan - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value $ 5,507 $ 5,497 $ 4,993
Short-term Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 112 92  
Equity Securities, Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 913 1,260  
Equity Securities, International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 676 891  
Fixed Income Securities, Governmental      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,026 554  
Fixed Income Securities, Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,466 1,404  
Hedge Funds and Similar Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 567 710  
Private Equity and Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 747 586  
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,437 1,056  
Level 1 | Short-term Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 112 92  
Level 1 | Equity Securities, Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 155 167  
Level 1 | Equity Securities, International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 88 100  
Level 1 | Fixed Income Securities, Governmental      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 943 459  
Level 1 | Fixed Income Securities, Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Level 1 | Hedge Funds and Similar Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 139 238  
Level 1 | Private Equity and Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,612 1,560  
Level 2 | Short-term Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Level 2 | Equity Securities, Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Level 2 | Equity Securities, International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Level 2 | Fixed Income Securities, Governmental      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 83 95  
Level 2 | Fixed Income Securities, Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,466 1,404  
Level 2 | Hedge Funds and Similar Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 63 61  
Level 2 | Private Equity and Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 2,458 2,881  
Other | Short-term Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Other | Equity Securities, Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 758 1,093  
Other | Equity Securities, International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 588 791  
Other | Fixed Income Securities, Governmental      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Other | Fixed Income Securities, Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Other | Hedge Funds and Similar Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 365 411  
Other | Private Equity and Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value $ 747 $ 586  
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Contributions to the VEBA) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Contribution Plan Disclosure [Line Items]      
Contributions $ 70 $ 73 $ 65
DTE Electric      
Defined Contribution Plan Disclosure [Line Items]      
Contributions 34 34 31
Retiree healthcare plan (VEBA)      
Defined Contribution Plan Disclosure [Line Items]      
Contributions 18 15 13
Retiree healthcare plan (VEBA) | DTE Electric      
Defined Contribution Plan Disclosure [Line Items]      
Contributions $ 8 $ 7 $ 6
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Postretirement Cost Inclusions) (Details) - Other postretirement benefit plan - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 30 $ 26 $ 22
Interest cost 46 56 70
Expected return on plan assets (129) (128) (96)
Amortization of:      
Net actuarial loss 13 16 12
Prior service credit (19) (19) (9)
Net pension cost/other postretirement cost (credit) (59) (49) (1)
DTE Electric      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 23 20 16
Interest cost 35 43 53
Expected return on plan assets (86) (87) (65)
Amortization of:      
Net actuarial loss 11 11 5
Prior service credit (14) (14) (7)
Net pension cost/other postretirement cost (credit) $ (31) $ (27) $ 2
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Other Changes in Plan Assets and APBO Recognized in Regulatory Assets and OCI) (Details) - Other postretirement benefit plan - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and Other comprehensive income (loss)    
Net actuarial gain $ (113) $ (38)
Amortization of net actuarial loss (13) (16)
Prior service credit (cost) 1 0
Amortization of prior service credit 19 19
Total recognized in Regulatory assets and Other comprehensive income (loss) (106) (35)
Total recognized in net periodic pension cost, Regulatory assets, and Other comprehensive income (loss) (165) (84)
DTE Electric    
Other changes in plan assets and accumulated postretirement benefit obligation recognized in Regulatory assets and Other comprehensive income (loss)    
Net actuarial gain (84) (26)
Amortization of net actuarial loss (11) (11)
Amortization of prior service credit 14 14
Total recognized in Regulatory assets and Other comprehensive income (loss) (81) (23)
Total recognized in net periodic pension cost, Regulatory assets, and Other comprehensive income (loss) $ (112) $ (50)
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Reconciliation of Obligations, Assets and Funded Status of Plans) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Change in accumulated postretirement benefit obligation      
Plan amendments $ 4 $ 0  
Amounts recognized in Regulatory assets      
Regulatory assets 3,677 4,254  
Other postretirement benefit plan      
Change in accumulated postretirement benefit obligation      
Projected/Accumulated postretirement benefit obligation, beginning of year 1,807 1,751  
Service cost 30 26 $ 22
Interest cost 46 56 70
Plan amendments 1 0  
Actuarial (gain) loss (100) 54  
Benefits paid (82) (80)  
Projected/Accumulated postretirement benefit obligation, end of year 1,702 1,807 1,751
Change in plan assets      
Plan assets at fair value, beginning of year 1,960 1,819  
Actual return on plan assets 142 220  
Benefits paid (81) (79)  
Plan assets at fair value, end of year 2,021 1,960 1,819
Funded status 319 153  
Amount recorded as:      
Noncurrent assets 678 561  
Current liabilities (1) (1)  
Noncurrent liabilities (358) (407)  
Defined benefit plans assets (liabilities) 319 153  
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax      
Net actuarial gain (1) (7)  
Amounts recognized in Regulatory assets      
Net actuarial loss 102 234  
Prior service credit (49) (69)  
Regulatory assets 53 165  
DTE Electric      
Amounts recognized in Regulatory assets      
Regulatory assets 3,136 3,563  
DTE Electric | Other postretirement benefit plan      
Change in accumulated postretirement benefit obligation      
Projected/Accumulated postretirement benefit obligation, beginning of year 1,369 1,337  
Service cost 23 20 16
Interest cost 35 43 53
Plan amendments 0 0  
Actuarial (gain) loss (73) 31  
Benefits paid (61) (62)  
Projected/Accumulated postretirement benefit obligation, end of year 1,293 1,369 1,337
Change in plan assets      
Plan assets at fair value, beginning of year 1,320 1,236  
Actual return on plan assets 96 145  
Benefits paid (61) (61)  
Plan assets at fair value, end of year 1,355 1,320 $ 1,236
Funded status 62 (49)  
Amount recorded as:      
Noncurrent assets 402 335  
Current liabilities 0 0  
Noncurrent liabilities (340) (384)  
Defined benefit plans assets (liabilities) 62 (49)  
Amounts recognized in Accumulated other comprehensive income (loss), pre-tax      
Net actuarial gain 0 0  
Amounts recognized in Regulatory assets      
Net actuarial loss 61 156  
Prior service credit (34) (48)  
Regulatory assets $ 27 $ 108  
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Accumulated Postretirement Obligations in Excess of Plan Assets) (Details) - Other postretirement benefit plan - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Accumulated postretirement benefit obligation $ 822 $ 878
Fair value of plan assets 463 470
Accumulated postretirement benefit obligation in excess of plan assets 359 408
DTE Electric    
Defined Benefit Plan Disclosure [Line Items]    
Accumulated postretirement benefit obligation 775 826
Fair value of plan assets 435 442
Accumulated postretirement benefit obligation in excess of plan assets $ 340 $ 384
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Benefits related to Qualified and Nonqualified Pension Plans Expected to be paid in the Next Ten Years) (Details) - Other postretirement benefit plan
$ in Millions
Dec. 31, 2021
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2022 $ 85
2023 89
2024 91
2025 94
2026 95
2027-2031 493
Total 947
DTE Electric  
Defined Benefit Plan Disclosure [Line Items]  
2022 64
2023 68
2024 69
2025 71
2026 72
2027-2031 375
Total $ 719
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Assumptions used in Determining the PBO and Net Pension Costs) (Details)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated postretirement benefit obligation      
Ultimate health care trend rate     4.50%
Other postretirement benefit costs      
Ultimate health care trend rate     4.50%
Other postretirement benefit plan      
Accumulated postretirement benefit obligation      
Discount rate 2.91% 2.58% 3.29%
Health care trend rate pre- 65 6.75% 6.75% 6.75%
Health care trend post- 65 7.25% 7.25% 7.25%
Ultimate health care trend rate 4.50% 4.50% 4.50%
Other postretirement benefit costs      
Discount rate 2.58% 3.29% 4.40%
Expected long-term rate of return on plan assets 6.70% 7.20% 7.30%
Health care trend rate pre- 65 6.75% 6.75% 6.75%
Health care trend post- 65 7.25% 7.25% 7.25%
Ultimate health care trend rate 4.50% 4.50% 4.50%
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Target Allocations of Plan Assets) (Details) - Other postretirement benefit plan
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 100.00%
U.S. Large Cap Equity Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 10.00%
U.S. Small Cap and Mid Cap Equity Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 2.00%
Non-U.S. Equity Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 10.00%
Fixed Income Securities  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 54.00%
Hedge Funds and Similar Investments  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 10.00%
Private Equity and Other  
Defined Benefit Plan Disclosure [Line Items]  
Target allocation percentage of assets 14.00%
v3.22.0.1
Retirement Benefits and Trusteed Assets (OPEB - Fair Value Measurements) (Details) - Other postretirement benefit plan - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value $ 2,021 $ 1,960 $ 1,819
Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 494 196  
Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 413 539  
Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,114 1,225  
Short-term Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 39 21  
Short-term Investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 39 21  
Short-term Investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Short-term Investments | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Equity Securities, Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 226 251  
Equity Securities, Domestic | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 27 51  
Equity Securities, Domestic | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Equity Securities, Domestic | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 199 200  
Equity Securities, International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 168 201  
Equity Securities, International | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 27 23  
Equity Securities, International | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Equity Securities, International | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 141 178  
Fixed Income Securities, Governmental      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 375 85  
Fixed Income Securities, Governmental | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 343 40  
Fixed Income Securities, Governmental | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 32 45  
Fixed Income Securities, Governmental | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Fixed Income Securities, Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 626 856  
Fixed Income Securities, Corporate | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Fixed Income Securities, Corporate | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 355 477  
Fixed Income Securities, Corporate | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 271 379  
Hedge Funds and Similar Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 204 202  
Hedge Funds and Similar Investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 58 61  
Hedge Funds and Similar Investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 26 17  
Hedge Funds and Similar Investments | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 120 124  
Private Equity and Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 383 344  
Private Equity and Other | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Private Equity and Other | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
Private Equity and Other | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 383 344  
DTE Electric      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 1,355 1,320 $ 1,236
DTE Electric | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 331 128  
DTE Electric | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 273 363  
DTE Electric | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 751 829  
DTE Electric | Short-term Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 26 14  
DTE Electric | Short-term Investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 26 14  
DTE Electric | Short-term Investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Short-term Investments | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Equity Securities, Domestic      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 150 164  
DTE Electric | Equity Securities, Domestic | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 18 33  
DTE Electric | Equity Securities, Domestic | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Equity Securities, Domestic | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 132 131  
DTE Electric | Equity Securities, International      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 111 133  
DTE Electric | Equity Securities, International | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 18 16  
DTE Electric | Equity Securities, International | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Equity Securities, International | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 93 117  
DTE Electric | Fixed Income Securities, Governmental      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 251 55  
DTE Electric | Fixed Income Securities, Governmental | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 230 24  
DTE Electric | Fixed Income Securities, Governmental | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 21 31  
DTE Electric | Fixed Income Securities, Governmental | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Fixed Income Securities, Corporate      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 422 584  
DTE Electric | Fixed Income Securities, Corporate | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Fixed Income Securities, Corporate | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 235 321  
DTE Electric | Fixed Income Securities, Corporate | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 187 263  
DTE Electric | Hedge Funds and Similar Investments      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 137 135  
DTE Electric | Hedge Funds and Similar Investments | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 39 41  
DTE Electric | Hedge Funds and Similar Investments | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 17 11  
DTE Electric | Hedge Funds and Similar Investments | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 81 83  
DTE Electric | Private Equity and Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 258 235  
DTE Electric | Private Equity and Other | Level 1      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Private Equity and Other | Level 2      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value 0 0  
DTE Electric | Private Equity and Other | Other      
Defined Benefit Plan Disclosure [Line Items]      
Plan assets at fair value $ 258 $ 235  
v3.22.0.1
Stock-Based Compensation (Details Textuals)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized limit of common stock shares (in shares) 20,162,716    
Performance units price per unit (in dollars per share) 1.00    
DTE Electric | DTE Energy      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation cost charged against income (in millions) | $ $ 45 $ 37 $ 43
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 500,000    
Restricted Stock Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 150,000    
Award vesting period 3 years    
Compensation cost charged against income (in millions) | $ $ 14 $ 13 $ 11
Performance Share Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 300,000    
Award vesting period 3 years    
Performance Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum award per employee (in shares) 1,000,000    
v3.22.0.1
Stock-Based Compensation (Components of Stock Based Compensation) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Components of stock based-compensation [Abstract]      
Stock-based compensation expense $ 71 $ 63 $ 71
Tax benefit 13 12 13
Stock-based compensation cost capitalized in Property, plant, and equipment $ 0 $ 0 $ 16
v3.22.0.1
Stock-Based Compensation (Activity Relating to Performance Share Awards) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Compensation Expense Recorded [Line Items]      
Compensation expense $ 71 $ 63 $ 71
Performance Share Awards      
Compensation Expense Recorded [Line Items]      
Weighted grant date fair value of awards granted (in dollars per share) $ 118.43 $ 129.68 $ 115.85
Awards settled in cash $ 12 $ 21 $ 19
Awards settled in stock 74 53 79
Compensation expense $ 58 $ 50 $ 60
v3.22.0.1
Stock-Based Compensation (Performance Share Awards Activity) (Details) - Performance shares - $ / shares
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Performance Shares      
Balance at beginning of period (in shares) 1,127,437    
Grants (in shares) 567,196    
Forfeitures (in shares) (162,091)    
Payouts (in shares) (429,925)    
Balance at end of period (in shares) 1,102,617 1,127,437  
Weighted Average Grant Date Fair Value      
Balance at beginning of period (in dollars per share) $ 117.06    
Grants (in dollars per share) 118.43 $ 129.68 $ 115.85
Forfeitures (in dollars per share) 123.04    
Payouts (in dollars per share) 107.84    
Balance at end of period (in dollars per share) $ 120.33 $ 117.06  
Incremental shares granted to DTE Energy employees who did not separate with DT Midstream (in shares) 166,686    
Cancellation of shares that were held by employees that separated due to the spin-off (in shares) 95,923    
v3.22.0.1
Stock-Based Compensation (Unrecognized Compensation Costs) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
Share Based Compensation Unrecognized and Non-Vested Cost [Line Items]  
Unrecognized Compensation Cost $ 63
Weighted Average to be Recognized 1 year 2 months 4 days
Stock awards  
Share Based Compensation Unrecognized and Non-Vested Cost [Line Items]  
Unrecognized Compensation Cost $ 19
Weighted Average to be Recognized 1 year 6 months
Performance shares  
Share Based Compensation Unrecognized and Non-Vested Cost [Line Items]  
Unrecognized Compensation Cost $ 44
Weighted Average to be Recognized 1 year 14 days
v3.22.0.1
Segment and Related Information (Details Textuals)
customer in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
USD ($)
customer
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Segment Reporting [Abstract]      
Number of electric utility customers | customer 2.3    
Number of gas utility customers | customer 1.3    
Segment Reporting Information [Line Items]      
Operating Revenues — Non-utility operations $ 7,676 $ 4,578 $ 5,530
Continuing operations      
Segment Reporting Information [Line Items]      
Operating Revenues — Non-utility operations 7,676 4,578 5,530
Reclassifications and Eliminations | Continuing operations      
Segment Reporting Information [Line Items]      
Operating Revenues — Non-utility operations (651) (525) (647)
Reclassifications and Eliminations | Gas Storage and Pipelines | Continuing operations      
Segment Reporting Information [Line Items]      
Operating Revenues — Non-utility operations $ 14 $ 26 $ 27
v3.22.0.1
Segment and Related Information (Inter-Segment Billing) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]                      
Operating Revenues $ (4,647) $ (3,715) $ (3,021) $ (3,581) $ (3,080) $ (3,080) $ (2,411) $ (2,852) $ (14,964) $ (11,423) $ (12,168)
Operating Revenues — Non-utility operations                 (7,676) (4,578) (5,530)
Electric                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 (5,821) (5,520) (5,229)
Gas                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 (1,553) (1,414) (1,482)
DTE Vantage                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 (1,482) (1,224) (1,560)
Energy Trading                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 (6,831) (3,863) (4,610)
Reclassifications and Eliminations                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 711 574 688
Reclassifications and Eliminations | Electric                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 64 61 56
Operating Revenues — Non-utility operations                 4 2  
Reclassifications and Eliminations | Gas                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 14 16 12
Reclassifications and Eliminations | DTE Vantage                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 575 464 596
Reclassifications and Eliminations | Energy Trading                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 56 31 22
Reclassifications and Eliminations | Corporate and Other                      
Segment Reporting Information [Line Items]                      
Operating Revenues                 $ 2 $ 2 $ 2
v3.22.0.1
Segment and Related Information (Financial Data) (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 $ 7,288 $ 6,845 $ 6,638
Operating Revenues — Non-utility operations                 7,676 4,578 5,530
Depreciation and amortization                 1,377 1,292 1,169
Interest expense                 630 601 568
Interest income                 (22) (29) (9)
Equity in earnings of equity method investees                 38 26 14
Income Tax Expense (Benefit)                 (130) 37 71
Net Income (Loss) Attributable to DTE Energy Company $ 306 $ 25 $ 179 $ 397 $ 275 $ 476 $ 277 $ 340 907 1,368 1,169
Investments in equity method investees 187       177       187 177  
Capital expenditures and acquisitions                 3,772 3,983 5,467
Goodwill 1,993       1,993       1,993 1,993  
Total Assets 39,719       45,496       39,719 45,496 42,268
Loss on extinguishment of debt   376             393 6 0
Deferred tax benefit for deferred tax remeasurement   $ 85             85    
Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 7,288 6,845 6,638
Operating Revenues — Non-utility operations                 7,676 4,578 5,530
Depreciation and amortization                 1,377 1,292 1,169
Interest expense                 630 601 568
Interest income                 (22) (29) (9)
Equity in earnings of equity method investees                 38 26 14
Income Tax Expense (Benefit)                 (130) 37 71
Net Income (Loss) Attributable to DTE Energy Company                 796 1,054 955
Investments in equity method investees 187       177       187 177 177
Capital expenditures and acquisitions                 3,712 3,466 2,957
Goodwill 1,993       1,993       1,993 1,993 1,993
Total Assets 39,719       37,420       39,719 37,420 34,605
Discontinued operations                      
Segment Reporting Information [Line Items]                      
Net Income (Loss) Attributable to DTE Energy Company                 111 314 214
Capital expenditures and acquisitions                 60 517 2,510
Total Assets 0       8,076       0 8,076 7,663
Operating Segments | Electric | Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 5,809 5,506 5,224
Operating Revenues — Non-utility operations                 12 14 5
Depreciation and amortization                 1,122 1,057 949
Interest expense                 338 337 315
Interest income                 0 (4) (2)
Equity in earnings of equity method investees                 0 0 1
Income Tax Expense (Benefit)                 104 108 137
Net Income (Loss) Attributable to DTE Energy Company                 864 777 714
Investments in equity method investees 6       6       6 6 5
Capital expenditures and acquisitions                 3,016 2,701 2,368
Goodwill 1,208       1,208       1,208 1,208 1,208
Total Assets 28,524       26,588       28,524 26,588 24,617
Operating Segments | Gas | Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 1,553 1,414 1,482
Operating Revenues — Non-utility operations                 0 0 0
Depreciation and amortization                 177 157 144
Interest expense                 81 80 78
Interest income                 (6) (5) (6)
Equity in earnings of equity method investees                 1 1 2
Income Tax Expense (Benefit)                 38 48 62
Net Income (Loss) Attributable to DTE Energy Company                 214 186 185
Investments in equity method investees 13       12       13 12 11
Capital expenditures and acquisitions                 621 574 530
Goodwill 743       743       743 743 743
Total Assets 6,729       6,339       6,729 6,339 5,717
Operating Segments | DTE Vantage | Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 0 0 0
Operating Revenues — Non-utility operations                 1,482 1,224 1,560
Depreciation and amortization                 71 72 69
Interest expense                 28 37 33
Interest income                 (23) (22) (9)
Equity in earnings of equity method investees                 8 17 14
Income Tax Expense (Benefit)                 (31) (40) (63)
Net Income (Loss) Attributable to DTE Energy Company                 168 134 133
Investments in equity method investees 118       125       118 125 130
Capital expenditures and acquisitions                 69 186 54
Goodwill 25       25       25 25 25
Total Assets 983       696       983 696 537
Operating Segments | Energy Trading | Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 0 0 0
Operating Revenues — Non-utility operations                 6,831 3,863 4,610
Depreciation and amortization                 6 5 6
Interest expense                 5 6 8
Interest income                 (1) (2) (4)
Equity in earnings of equity method investees                 0 0 0
Income Tax Expense (Benefit)                 (27) 12 17
Net Income (Loss) Attributable to DTE Energy Company                 (83) 36 49
Investments in equity method investees 0       0       0 0 0
Capital expenditures and acquisitions                 6 5 5
Goodwill 17       17       17 17 17
Total Assets 1,174       807       1,174 807 798
Operating Segments | Corporate and Other                      
Segment Reporting Information [Line Items]                      
Loss on extinguishment of debt                 376    
Deferred tax benefit for deferred tax remeasurement                 85    
Operating Segments | Corporate and Other | Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 0 0 0
Operating Revenues — Non-utility operations                 2 2 2
Depreciation and amortization                 1 1 1
Interest expense                 270 325 266
Interest income                 (84) (180) (120)
Equity in earnings of equity method investees                 29 8 (3)
Income Tax Expense (Benefit)                 (214) (91) (82)
Net Income (Loss) Attributable to DTE Energy Company                 (367) (79) (126)
Investments in equity method investees 50       34       50 34 31
Capital expenditures and acquisitions                 0 0 0
Goodwill 0       0       0 0 0
Total Assets 4,281       5,063       4,281 5,063 4,779
Reclassifications and Eliminations | Continuing operations                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Utility operations                 (74) (75) (68)
Operating Revenues — Non-utility operations                 (651) (525) (647)
Depreciation and amortization                 0 0 0
Interest expense                 (92) (184) (132)
Interest income                 92 184 132
Equity in earnings of equity method investees                 0 0 0
Income Tax Expense (Benefit)                 0 0 0
Net Income (Loss) Attributable to DTE Energy Company                 0 0 0
Investments in equity method investees 0       0       0 0 0
Capital expenditures and acquisitions                 0 0 0
Goodwill 0       0       0 0 0
Total Assets $ (1,972)       $ (2,073)       (1,972) (2,073) $ (1,843)
Reclassifications and Eliminations | Electric                      
Segment Reporting Information [Line Items]                      
Operating Revenues — Non-utility operations                 $ (4) $ (2)  
v3.22.0.1
Related Party Transactions (DTE Electric Transactions with Affiliated Companies) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]      
Dividends declared $ 752,000,000 $ 796,000,000 $ 714,000,000
Dividends paid 791,000,000 760,000,000 692,000,000
DTE Electric      
Related Party Transaction [Line Items]      
Dividends declared 588,000,000 539,000,000 494,000,000
Dividends paid 588,000,000 539,000,000 494,000,000
DTE Electric | Energy sales      
Related Party Transaction [Line Items]      
Revenues and Other Income 9,000,000 8,000,000 10,000,000
DTE Electric | Other services and interest      
Related Party Transaction [Line Items]      
Other services and interest 2,000,000 2,000,000 5,000,000
Costs 0 1,000,000 24,000,000
DTE Electric | Shared capital assets      
Related Party Transaction [Line Items]      
Revenues and Other Income 49,000,000 47,000,000 42,000,000
DTE Electric | Fuel and purchased power      
Related Party Transaction [Line Items]      
Costs 13,000,000 16,000,000 6,000,000
DTE Electric | Corporate expenses      
Related Party Transaction [Line Items]      
Costs 391,000,000 367,000,000 372,000,000
DTE Electric | DTE Energy      
Related Party Transaction [Line Items]      
Dividends declared 588,000,000 539,000,000 494,000,000
Dividends paid 588,000,000 539,000,000 494,000,000
Capital contribution from DTE Energy 555,000,000 636,000,000 180,000,000
DTE Electric | DTE Energy Foundation      
Related Party Transaction [Line Items]      
Charitable contributions to foundation $ 2,000,000 $ 20,000,000 $ 0
v3.22.0.1
Supplementary Quarterly Financial Information (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]                      
Operating Revenues $ 4,647 $ 3,715 $ 3,021 $ 3,581 $ 3,080 $ 3,080 $ 2,411 $ 2,852 $ 14,964 $ 11,423 $ 12,168
Operating Income 415 405 242 433 368 479 263 445 1,495 1,555 1,430
Net Income from Continuing Operations 300 55 114 317 206 370 201 268 786 1,045 942
Net Income (Loss) from Discontinued Operations 5 (33) 65 80 69 107 76 74 117 326 230
Net Income 305 22 179 397 275 477 277 342 903 1,371 1,172
Net Income Attributable to DTE Energy Company/DTE Electric Company $ 306 $ 25 $ 179 $ 397 $ 275 $ 476 $ 277 $ 340 $ 907 $ 1,368 $ 1,169
Basic Earnings per Share                      
Continuing operations (in dollars per share) $ 1.56 $ 0.30 $ 0.60 $ 1.65 $ 1.08 $ 1.93 $ 1.06 $ 1.39 $ 4.11 $ 5.46 $ 5.16
Discontinued operations (in dollars per share) 0.02 (0.17) 0.32 0.40 0.34 0.54 0.38 0.38 0.57 1.63 1.16
Basic Earnings per Common Share (in dollars per share) 1.58 0.13 0.92 2.05 1.42 2.47 1.44 1.77 4.68 7.09 6.32
Diluted Earnings per Share                      
Continuing operations (in dollars per share) 1.55 0.30 0.60 1.65 1.08 1.92 1.06 1.39 4.10 5.45 5.15
Discontinued operations (in dollars per share) 0.02 (0.17) 0.32 0.40 0.34 0.54 0.38 0.37 0.57 1.63 1.16
Diluted Earnings per Common Share (in dollars per share) $ 1.57 $ 0.13 $ 0.92 $ 2.05 $ 1.42 $ 2.46 $ 1.44 $ 1.76 $ 4.67 $ 7.08 $ 6.31
Loss on extinguishment of debt   $ 376             $ 393 $ 6 $ 0
Deferred tax benefit for deferred tax remeasurement   $ 85             $ 85    
v3.22.0.1
Schedule II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)      
Balance at Beginning of Period $ 104    
Additions:      
Balance at End of Period 92 $ 104  
DTE Electric      
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)      
Balance at Beginning of Period 57    
Additions:      
Balance at End of Period 54 57  
Allowance for Doubtful Accounts      
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)      
Balance at Beginning of Period 104 83 $ 91
Additions:      
Charged to costs and expenses 54 105 103
Charged to other accounts 61 50 56
Deductions (127) (134) (167)
Balance at End of Period 92 104 83
Allowance for Doubtful Accounts | DTE Electric      
Allowance for Doubtful Accounts (shown as deduction from Accounts receivable in DTE Energy's Consolidated Statements of Financial Position)      
Balance at Beginning of Period 57 46 53
Additions:      
Charged to costs and expenses 36 61 65
Charged to other accounts 38 30 36
Deductions (77) (80) (108)
Balance at End of Period $ 54 $ 57 $ 46