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Financial and Derivative Instruments - Effect of Derivatives (Details) - Commodity - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Effect of derivatives, gain (loss), net | $ 305 | $ (630) | $ 47 | $ (646)
Sales and other operating revenues |  |  |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Effect of derivatives, gain (loss), net | 258 | (420) | 18 | (439)
Purchased crude oil and products |  |  |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Effect of derivatives, gain (loss), net | 55 | (202) | 16 | (183)
Other income (loss) |  |  |  |
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments |  |  |  |
Effect of derivatives, gain (loss), net | $ (8) | $ (8) | $ 13 | $ (24)

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