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Revenue (Disaggregation of Revenue By Segment) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 2,888 | $ 5,251 | $ 9,351 | $ 14,752
Operating segments | Electric |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 1,626 | 1,847 | 4,334 | 4,907
Operating segments | Electric | Residential |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 861 | 882 | 2,173 | 2,273
Operating segments | Electric | Commercial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 585 | 541 | 1,604 | 1,505
Operating segments | Electric | Industrial |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 190 | 167 | 545 | 498
Operating segments | Electric | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | (10) | 257 | 12 | 631
Operating segments | Electric | Other | DTE Sustainable Generation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 3 | 3 | 10 | 11
Operating segments | Gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 227 | 230 | 1,245 | 1,358
Operating segments | Gas | Gas sales |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 119 | 128 | 936 | 955
Operating segments | Gas | End User Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 44 | 42 | 184 | 195
Operating segments | Gas | Intermediate Transportation |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 16 | 15 | 63 | 60
Operating segments | Gas | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 48 | 45 | 62 | 148
Operating segments | DTE Vantage |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | 199 | 227 | 572 | 626
Operating segments | Energy Trading |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenues | $ 893 | $ 3,024 | $ 3,365 | $ 8,059

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