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Income Taxes (Reconciliation of Income Tax Expense to the Statutory Federal Income Tax Rate) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Before Income Taxes | $ 1,112 | $ 656 | $ 1,082
Income tax expense at 21% statutory rate | 234 | 138 | 227
TCJA regulatory liability amortization | (155) | (103) | (76)
Production tax credits | (91) | (138) | (121)
Net operating loss carryback | (5) | 0 | (34)
State deferred tax remeasurement due to separation of DT Midstream, net of federal benefit | 0 | (85) | 0
Enactment of West Virginia income tax legislation, net of federal benefit | 0 | 8 | 0
Deferred intercompany gain | 0 | 9 | 0
Valuation allowance on charitable contribution carryforwards | 9 | 18 | 3
State and local income taxes, excluding items above, net of federal benefit | 42 | 30 | 47
Other, net | (5) | (7) | (9)
Income Tax Expense (Benefit) | $ 29 | $ (130) | $ 37
Effective income tax rate | 2.60% | (19.90%) | 3.40%
DTE Electric |  |  |
Effective Income Tax Rate Reconciliation, Amount [Abstract] |  |  |
Income Before Income Taxes | $ 981 | $ 970 | $ 887
Income tax expense at 21% statutory rate | 206 | 204 | 186
TCJA regulatory liability amortization | (145) | (73) | (62)
Production tax credits | (83) | (70) | (55)
State and local income taxes, excluding items above, net of federal benefit | 56 | 54 | 50
Other, net | (8) | (11) | (10)
Income Tax Expense (Benefit) | $ 26 | $ 104 | $ 109
Effective income tax rate | 2.70% | 10.70% | 12.30%

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