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Financial and Other Derivative Instruments (Fair Value of Derivative Instruments) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 891 | $ 1,197
Derivative Liabilities | (935) | (1,172)
Current derivative assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 658 | 910
Current derivative liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (642) | (847)
Noncurrent derivative assets |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 233 | 287
Noncurrent derivative liabilities |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Liabilities | (293) | (325)
Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 10 | 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 | 499 | 637
Derivative Liabilities | (506) | (615)
Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 235 | 421
Derivative Liabilities | (267) | (388)
Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 146 | 139
Derivative Liabilities | (161) | (150)
Derivatives designated as hedging instruments |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 10 | 0
Derivative Liabilities | (1) | (18)
Derivatives designated as hedging instruments | Interest rate contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 10 | 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 | 881 | 1,197
Derivative Liabilities | (934) | (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 | 499 | 637
Derivative Liabilities | (506) | (615)
Derivatives not designated as hedging instruments | Electricity |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 235 | 421
Derivative Liabilities | (267) | (388)
Derivatives not designated as hedging instruments | Environmental & Other |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | 146 | 139
Derivative Liabilities | (161) | (150)
Derivatives not designated as hedging instruments | FTRs | Other current assets | DTE Electric |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Assets | $ 3 | $ 7

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