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Revenue (Revenues Outside the Scope of Topic 606) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Disaggregation of Revenue [Line Items] |  |  |  |
Leases | $ 17 | $ 19 | $ 46 | $ 45
Operating segments | Electric |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Alternative Revenue Program | 0 | 0 | 1 | 0
Other revenues | 7 | 11 | 17 | 20
Operating segments | Gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Alternative Revenue Program | 0 | 1 | 0 | 9
Other revenues | 2 | 3 | 9 | 9
Operating segments | DTE Vantage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Leases | 17 | 19 | 46 | 45
Operating segments | Energy Trading |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Derivatives | $ 778 | $ 536 | $ 3,243 | $ 1,781

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