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Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 837 | $ 694
Derivative Liabilities | (758) | (605)
Current derivative assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 607 | 488
Current derivative liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (546) | (441)
Noncurrent derivative assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 230 | 206
Noncurrent derivative liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (212) | (164)
Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 3 | 20
Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 1
Derivative Liabilities | (1) | (1)
Natural gas |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 461 | 428
Derivative Liabilities | (395) | (410)
Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 304 | 187
Derivative Liabilities | (310) | (150)
Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 68 | 58
Derivative Liabilities | (52) | (44)
Derivatives designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 3 | 20
Derivative Liabilities | (1) | (1)
Derivatives designated as hedging instruments | Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 3 | 20
Derivative Liabilities | 0 | 0
Derivatives designated as hedging instruments | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 0 | 0
Derivative Liabilities | (1) | (1)
Derivatives not designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 834 | 674
Derivative Liabilities | (757) | (604)
Derivatives not designated as hedging instruments | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 1
Derivative Liabilities | 0 | 0
Derivatives not designated as hedging instruments | Natural gas |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 461 | 428
Derivative Liabilities | (395) | (410)
Derivatives not designated as hedging instruments | Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 304 | 187
Derivative Liabilities | (310) | (150)
Derivatives not designated as hedging instruments | Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 68 | 58
Derivative Liabilities | (52) | (44)
Derivatives not designated as hedging instruments | FTRs | Other current assets | DTE Electric |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 3 | $ 9

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