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Retirement Benefits and Trusteed Assets (OPEB - Contributions to the VEBA) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contributions | $ 76 | $ 75 | $ 73
DTE Electric |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contributions | 35 | 35 | 35
Retiree healthcare plan (VEBA) |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contributions | 15 | 16 | 16
Retiree healthcare plan (VEBA) | DTE Electric |  |  |
Defined Contribution Plan Disclosure [Line Items] |  |  |
Contributions | $ 6 | $ 7 | $ 7

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