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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
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Entity Information [Line Items] |  |  |
Income Before Income Taxes | $ 1,566 | $ 1,112 | $ 656
Income tax expense at 21% statutory rate | 329 | 234 | 138
Production tax credits | (91) | (91) | (138)
TCJA regulatory liability amortization | (63) | (155) | (103)
Investment tax credits | (44) | (1) | (3)
Enactment of state income tax legislation, net of federal benefit | (1) | 0 | 8
State deferred tax remeasurement due to separation of DT Midstream, net of federal benefit | 0 | 0 | (85)
Valuation allowance on charitable contribution carryforwards | 0 | 9 | 18
State and local income taxes, excluding items above, net of federal benefit | 59 | 42 | 30
Other, net | (20) | (9) | 5
Income Tax Expense (Benefit) | $ 169 | $ 29 | $ (130)
Effective income tax rate | 10.80% | 2.60% | (19.90%)
DTE Electric |  |  |
Entity Information [Line Items] |  |  |
Income Before Income Taxes | $ 850 | $ 981 | $ 970
Income tax expense at 21% statutory rate | 179 | 206 | 204
Production tax credits | (79) | (83) | (70)
TCJA regulatory liability amortization | (53) | (145) | (73)
State and local income taxes, excluding items above, net of federal benefit | 45 | 56 | 54
Other, net | (14) | (8) | (11)
Income Tax Expense (Benefit) | $ 78 | $ 26 | $ 104
Effective income tax rate | 9.20% | 2.70% | 10.70%

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