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Retirement Benefits and Trusteed Assets (Details Textuals) - USD ($) | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
Pension plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension credit | $ 5,000,000 | $ 17,000,000
Anticipated contributions, current fiscal year | 0 |
Postretirement benefit plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension credit | 11,000,000 | 9,000,000
Anticipated contributions, current fiscal year | 0 |
DTE Electric | Pension plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension credit | 1,000,000 | 9,000,000
DTE Electric | Postretirement benefit plans |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Pension credit | $ 6,000,000 | $ 6,000,000

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