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Significant Accounting Policies (Schedule of Other Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Schedule of Other Nonoperating Income, by Component [Line Items] |  |  |
Allowance for equity funds used during construction | $ 29 | $ 27 | $ 25
Contract services | 28 | 27 | 28
Gains from rabbi trust securities | 3 | 8 | 28
Income from REF entities | 0 | 141 | 139
Equity earnings (losses) of equity method investees | (14) | 38 | 26
Other | 12 | 13 | 13
Other income | 58 | 254 | 259
DTE Electric |  |  |
Schedule of Other Nonoperating Income, by Component [Line Items] |  |  |
Allowance for equity funds used during construction | 26 | 25 | 23
Contract services | 27 | 27 | 28
Gains from rabbi trust securities | 3 | 8 | 28
Other | 9 | 11 | 8
Other income | $ 65 | $ 71 | $ 87

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