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Revenue (Disaggregation of Revenue By Segment) (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] |  |  |  |
Revenues | $ 3,527 | $ 2,906 | $ 11,386 | $ 9,021
Operating segments | Electric |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 2,051 | 1,697 | 5,196 | 4,783
Operating segments | Electric | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 968 | 946 | 2,421 | 2,390
Operating segments | Electric | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 606 | 632 | 1,671 | 1,759
Operating segments | Electric | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 169 | 189 | 493 | 559
Operating segments | Electric | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 308 | (70) | 611 | 75
Operating segments | Electric | Other | DTE Sustainable Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 14 | 2 | 23 | 11
Operating segments | Gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 209 | 230 | 1,401 | 1,230
Operating segments | Gas | Gas sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 112 | 125 | 1,033 | 891
Operating segments | Gas | End User Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 44 | 45 | 186 | 180
Operating segments | Gas | Intermediate Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 15 | 15 | 62 | 60
Operating segments | Gas | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 38 | 45 | 120 | 99
Operating segments | DTE Vantage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 163 | 190 | 520 | 555
Operating segments | Energy Trading |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 1,179 | $ 840 | $ 4,529 | $ 2,610

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