Exploratory Well and Project Costs - Schedule of Capitalized Exploratory Well And Project Activity (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward]
Beginning capitalized exploratory well and project costs	$ 834	$ 632	$ 498
Additions to exploratory well and project costs pending the determination of proved reserves	3,940	3,341	2,935
Additions to capitalized exploratory well and project costs from acquisitions	0	0	235
Reclassifications due to determination of proved reserves	(3,990)	(3,139)	(2,973)
Disposition of assets	0	0	(63)
Ending capitalized exploratory well and project costs	$ 784	$ 834	$ 632