Financial and Derivative Instruments - Effect of Derivatives Not Designated On Hedging Instruments (Details) - Commodity - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments
Derivative instruments not designated as hedging instruments, gain (loss), net	$ 66	$ (49)	$ (128)	$ (258)
Sales and other operating revenues
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments
Derivative instruments not designated as hedging instruments, gain (loss), net	86	(82)	(58)	(240)
Purchased crude oil and products
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments
Derivative instruments not designated as hedging instruments, gain (loss), net	(19)	25	(63)	(39)
Other income (loss)
Consolidated Statement of Income: The Effect of Derivatives not Designated as Hedging Instruments
Derivative instruments not designated as hedging instruments, gain (loss), net	$ (1)	$ 8	$ (7)	$ 21