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Derivative and Financial Instruments - Gain (Loss) Amounts of Derivatives, Income Statement Location (Details) - Commodity - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Sales and other operating revenues
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from commodity derivatives	$ 86	$ (88)	$ (228)
Other income
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from commodity derivatives	(6)	(5)	25
Purchased commodities
Derivative Instruments, Gain (Loss) [Line Items]
Gains (losses) from commodity derivatives	$ (90)	$ (91)	$ 75

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