Property, Plant and Equipment - Net Changes in Capitalized Exploratory Well Costs (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) well	Dec. 31, 2023 USD ($) well	Dec. 31, 2022 USD ($) well
Property, Plant and Equipment [Abstract]
Beginning balance	$ 952	$ 886	$ 681
Additions to capitalized exploratory well costs pending the determination of proved reserves	225	257	298
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	(117)	(133)	(93)
Capitalized exploratory well costs charged to expense	(50)	(58)	0
Ending balance	$ 1,010	$ 952	$ 886
Exploration and appraisal wells | well	40	43	43