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Long-Term Debt (Debt Redemptions) (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2024 | Nov. 30, 2024 | Oct. 31, 2024 | Sep. 30, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Amount |  |  |  |  |  |  | $ 2,139 | $ 1,616 | $ 1,587
Senior Notes | Senior Notes 2.53% Maturing In 2024 |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate |  |  | 2.53% |  |  |  |  |  |
Amount |  |  | $ 675 |  |  |  |  |  |
Senior Notes | Series F 4.22% Senior Notes Due November 1, 2024 |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 4.22% | 4.22% |  |  |  |  | 4.22% |  |
Amount |  | $ 1,300 |  |  |  |  |  |  |
DTE Electric |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Amount |  |  |  |  |  |  | $ 164 | $ 541 | $ 337
DTE Electric | Mortgage Bonds | 2013 Series B Mortgage Bonds |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  |  | 3.65% |  |  |
Amount |  |  |  |  |  | $ 100 |  |  |
DTE Electric | Securitization Bonds | 2.64% Securitization Bonds |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  |  | 2.64% |  |  |  |
Amount |  |  |  |  | $ 19 |  |  |  |
DTE Electric | Securitization Bonds | Securitization Bonds 5.97% Due 2024 |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate |  |  |  | 5.97% |  |  |  |  |
Amount |  |  |  | $ 24 |  |  |  |  |
DTE Electric | Securitization Bonds | 2.64% Securitization Bonds |  |  |  |  |  |  |  |  |
Debt Instrument, Redemption [Line Items] |  |  |  |  |  |  |  |  |
Interest Rate | 2.64% |  |  |  |  |  | 2.64% |  |
Amount | $ 21 |  |  |  |  |  |  |  |

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