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Derivatives (Classification of Gross Fair Values of Derivative Instruments, Excluding Cash Collateral) (Detail) - Commodity derivatives - USD ($) $ in Millions | Jun. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Other current assets |  |  |
Derivative [Line Items] |  |  |
Asset |  | $ 761 | $ 271
Liability |  | 622 | 249
Other current liabilities |  |  |
Derivative [Line Items] |  |  |
Asset |  | 0 | 0
Liability | [1] | 14 | 15
Deferred credits and other liabilities |  |  |
Derivative [Line Items] |  |  |
Asset |  | 0 | 0
Liability | [1] | $ 78 | $ 93
[1] | Includes embedded derivatives.

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