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Regulatory Matters (2023 Electric Rate Case Filing) (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 01, 2023 | Feb. 10, 2023 | Dec. 31, 2025 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Regulatory liability |  |  |  |  | $ 2,674 | $ 2,707
Other postretirement costs |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Regulatory liability |  |  |  |  | 210 | 191
DTE Electric |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Regulatory liability |  |  |  |  | 1,759 | 1,811
DTE Electric | Other postretirement costs |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Regulatory liability |  |  |  |  | $ 142 | $ 128
Amortization period for regulatory liability | 7 years |  |  |  |  |
MPSC | DTE Electric |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Approved return on equity, percent |  |  |  |  | 9.90% |
2023 DTE Electric Rate Case Filing | MPSC | DTE Electric |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Requested rate increase |  | $ 622 |  |  |  |
Approved return on equity, percent | 9.90% | 9.90% |  |  |  |
Requested return on equity, percent |  | 10.25% |  |  |  |
Approved revenue increase | $ 368 |  |  |  |  |
Estimated reduction to Operations and maintenance expense for regulatory liability amortization | 18 |  |  |  |  |
Disallowed capital expenditures | $ 25 |  |  |  |  |
2023 DTE Electric Rate Case Filing | MPSC | DTE Electric | Other postretirement costs |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Amortization period for regulatory liability | 7 years |  |  |  |  |
2023 DTE Electric Rate Case Filing | MPSC | DTE Electric | Recovery Mechanism, Infrastructure Recovery |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Recovery mechanism surcharge period | 2 years |  |  |  |  |
2023 DTE Electric Rate Case Filing | MPSC | DTE Electric | Recovery Mechanism, Infrastructure Recovery | Forecast |  |  |  |  |  |
Public Utilities, General Disclosures [Line Items] |  |  |  |  |  |
Recovery mechanism surcharge, expected annual revenue increase |  |  | $ 25 | $ 4 |  |

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