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Income Taxes (Deferred Tax Assets (Liabilities)) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, plant, and equipment | $ (3,695) | $ (3,423)
Regulatory assets and liabilities | (1,272) | (1,158)
Tax credit carryforwards | 1,604 | 1,519
Pension and benefits | 55 | 77
Federal net operating loss carryforward | 190 | 202
State and local net operating loss carryforwards | 68 | 76
Investments in equity method investees | (28) | (33)
Other | 145 | 130
Deferred tax assets (liabilities) | (2,933) | (2,610)
Less: Valuation allowance | (25) | (39)
Long-term deferred income tax liabilities | (2,958) | (2,649)
Deferred income tax assets | 2,508 | 2,415
Deferred income tax liabilities | (5,466) | (5,064)
DTE Electric |  |
Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, plant, and equipment | (2,788) | (2,693)
Regulatory assets and liabilities | (1,492) | (1,314)
Tax credit carryforwards | 583 | 572
Pension and benefits | 62 | 69
Federal net operating loss carryforward | 30 | 71
State and local net operating loss carryforwards | 42 | 49
Investments in equity method investees | (1) | 0
Other | 176 | 137
Deferred tax assets (liabilities) | (3,388) | (3,109)
Less: Valuation allowance | (5) | 0
Long-term deferred income tax liabilities | (3,393) | (3,109)
Deferred income tax assets | 1,209 | 1,202
Deferred income tax liabilities | $ (4,602) | $ (4,311)

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