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Income Taxes (Deferred Tax Assets (Liabilities)) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, plant, and equipment | $ (3,897) | $ (3,826)
Regulatory assets and liabilities | (493) | (124)
Tax credit carry-forwards | 1,378 | 1,260
Pension and benefits | 111 | 102
Federal net operating loss carry-forward | 266 | 199
State and local net operating loss carry-forwards | 97 | 73
Investments in equity method investees | 65 | 59
Other | 137 | 145
Deferred tax assets (liabilities) | (2,336) | (2,112)
Less: Valuation allowance | (58) | (51)
Long-term deferred income tax liabilities | (2,394) | (2,163)
Deferred income tax assets | 2,317 | 2,224
Deferred income tax liabilities | (4,711) | (4,387)
DTE Electric |  |
Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, plant, and equipment | (3,188) | (3,164)
Regulatory assets and liabilities | (589) | (230)
Tax credit carry-forwards | 487 | 379
Pension and benefits | 103 | 127
Federal net operating loss carry-forward | 58 | 5
State and local net operating loss carry-forwards | 38 | 15
Investments in equity method investees | 0 | (1)
Other | 145 | 128
Deferred tax assets (liabilities) | (2,946) | (2,741)
Less: Valuation allowance | 0 | 0
Long-term deferred income tax liabilities | (2,946) | (2,741)
Deferred income tax assets | 1,081 | 988
Deferred income tax liabilities | $ (4,027) | $ (3,729)

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