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Fair Value (Gains and Losses and Proceeds from the Sale of Securities by the Nuclear Decommissioning Trust Funds) (Details) - DTE Electric - Nuclear decommissioning trusts - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items] |  |  |
Realized gains | $ 71 | $ 95 | $ 192
Realized losses | (53) | (12) | (111)
Proceeds from sale of securities | $ 879 | $ 1,047 | $ 2,350

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