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Price Risk Management Activities, Effect of Derivative Instruments on Income and Other Comprehensive Income (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Commodity Contracts [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Gain (loss) recognized in other comprehensive income (loss) | $ 82 | $ (292) | $ (44)
Commodity Contracts [Member] | Revenues [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Loss reclassified from accumulated other comprehensive loss into income | (8) | (286) | (46)
Commodity Contracts [Member] | Revenues [Member] | Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Gain (loss) recognized in income on derivatives | (27) | (17) | 28
Commodity Contracts [Member] | Cost of Materials and Other [Member] | Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Gain (loss) recognized in income on derivatives | 208 | (988) | (86)
Commodity Contracts [Member] | Operating Expenses (Excluding Depreciation and Amortization Expense) [Member] | Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Gain (loss) recognized in income on derivatives | 1 | (1) | 54
Foreign Currency Contracts [Member] | Cost of Materials and Other [Member] | Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Gain (loss) recognized in income on derivatives | (34) | 73 | 9
Foreign Currency Contracts [Member] | Other Income, Net [Member] | Derivatives Not Designated as Hedging Instruments [Member] |  |  |
Effect of Derivative Instruments on Income |  |  |
Gain (loss) recognized in income on derivatives | $ 0 | $ (119) | $ 44

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