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Segment and Related Information (Financial Data - Operating Revenues including Inter-segment Revenues) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Utility operations | $ 1,827 | $ 2,053 | $ 5,504 | $ 6,196
Operating Revenues — Non-utility operations | 1,061 | 3,198 | 3,847 | 8,556
Operating Revenues | 2,888 | 5,251 | 9,351 | 14,752
Reconciliation and Eliminations |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Non-utility operations | (57) | (77) | (165) | (198)
Operating Revenues | (57) | (77) | (165) | (198)
Electric | Operating segments |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Utility operations | 1,623 | 1,844 | 4,324 | 4,896
Operating Revenues — Non-utility operations | 3 | 3 | 10 | 11
Operating Revenues | 1,626 | 1,847 | 4,334 | 4,907
Electric | Reconciliation and Eliminations |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues | (20) | (19) | (55) | (53)
Gas | Operating segments |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Utility operations | 227 | 230 | 1,245 | 1,358
Operating Revenues | 227 | 230 | 1,245 | 1,358
Gas | Reconciliation and Eliminations |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues | (4) | (4) | (13) | (10)
DTE Vantage | Operating segments |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Non-utility operations | 199 | 227 | 572 | 626
Operating Revenues | 199 | 227 | 572 | 626
DTE Vantage | Reconciliation and Eliminations |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues | (13) | (15) | (32) | (57)
Energy Trading | Operating segments |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Non-utility operations | 893 | 3,024 | 3,365 | 8,059
Operating Revenues | 893 | 3,024 | 3,365 | 8,059
Energy Trading | Reconciliation and Eliminations |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues | (20) | (39) | (65) | (78)
Corporate and Other | Operating segments |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues — Non-utility operations | 0 | 0 | 0 | 0
Corporate and Other | Reconciliation and Eliminations |  |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |  |
Operating Revenues | $ 0 | $ 0 | $ 0 | $ 0

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