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Derivatives (Classification of Gross Fair Values of Derivative Instruments, Excluding Cash Collateral) (Detail) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Commodity derivatives | Other current assets |  |
Derivative [Line Items] |  |
Asset | $ 303 | $ 244
Liability | 295 | 249
Embedded derivatives in commodity contracts | Other current liabilities |  |
Derivative [Line Items] |  |
Asset | 0 | 0
Liability | 10 | 11
Embedded derivatives in commodity contracts | Deferred credits and other liabilities |  |
Derivative [Line Items] |  |
Asset | 0 | 0
Liability | $ 59 | $ 50

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