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Income Taxes (Deferred Tax Assets (Liabilities)) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, plant, and equipment | $ (3,423) | $ (3,897)
Regulatory assets and liabilities | (1,158) | (493)
Tax credit carryforwards | 1,519 | 1,378
Pension and benefits | 77 | 111
Federal net operating loss carryforward | 202 | 266
State and local net operating loss carryforwards | 76 | 97
Investments in equity method investees | (33) |
Investments in equity method investees |  | 65
Other | 130 | 137
Deferred tax assets (liabilities) | (2,610) | (2,336)
Less: Valuation allowance | (39) | (58)
Long-term deferred income tax liabilities | (2,649) | (2,394)
Deferred income tax assets | 2,415 | 2,317
Deferred income tax liabilities | (5,064) | (4,711)
DTE Electric |  |
Components of Deferred Tax Assets and Liabilities [Abstract] |  |
Property, plant, and equipment | (2,693) | (3,188)
Regulatory assets and liabilities | (1,314) | (589)
Tax credit carryforwards | 572 | 487
Pension and benefits | 69 | 103
Federal net operating loss carryforward | 71 | 58
State and local net operating loss carryforwards | 49 | 38
Investments in equity method investees | 0 |
Investments in equity method investees |  | 0
Other | 137 | 145
Deferred tax assets (liabilities) | (3,109) | (2,946)
Less: Valuation allowance | 0 | 0
Long-term deferred income tax liabilities | (3,109) | (2,946)
Deferred income tax assets | 1,202 | 1,081
Deferred income tax liabilities | $ (4,311) | $ (4,027)

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