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Consolidated Statements of Comprehensive Income (Unaudited) - DTE Energy Company (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Statement of Comprehensive Income [Abstract] |  |  |  |
Tax effect on benefit obligations | $ 0 | $ 0 | $ 1 | $ 2
Tax effect on net unrealized losses on derivatives during the period | $ 4 | $ 1 | $ 5 | $ 2

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