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Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 694 | $ 1,197
Derivative Liabilities | $ (605) | $ (1,172)
Derivative Asset, Statement of Financial Position [Extensible Enumeration] | Derivative Asset, Current, Derivative Asset, Noncurrent | Derivative Asset, Current, Derivative Asset, Noncurrent
Current derivative asset |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 488 | $ 910
Noncurrent derivative asset |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 206 | 287
Current derivative liability |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (441) | (847)
Noncurrent derivative liability |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (164) | (325)
Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 20 | 0
Derivative Liabilities | 0 | (16)
Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Derivative Liabilities | (1) | (3)
Natural gas |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 428 | 637
Derivative Liabilities | (410) | (615)
Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 187 | 421
Derivative Liabilities | (150) | (388)
Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 58 | 139
Derivative Liabilities | (44) | (150)
Derivatives designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 20 | 0
Derivative Liabilities | (1) | (18)
Derivatives designated as hedging instruments | Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 20 | 0
Derivative Liabilities | 0 | (16)
Derivatives designated as hedging instruments | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 0 | 0
Derivative Liabilities | (1) | (2)
Derivatives not designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 674 | 1,197
Derivative Liabilities | (604) | (1,154)
Derivatives not designated as hedging instruments | Foreign currency exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 1 | 0
Derivative Liabilities | 0 | (1)
Derivatives not designated as hedging instruments | Natural gas |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 428 | 637
Derivative Liabilities | (410) | (615)
Derivatives not designated as hedging instruments | Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 187 | 421
Derivative Liabilities | (150) | (388)
Derivatives not designated as hedging instruments | Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 58 | 139
Derivative Liabilities | (44) | (150)
Derivatives not designated as hedging instruments | Derivative assets — FTRs | Other current assets | DTE Electric |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 9 | $ 7

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