Property, Plant and Equipment - Net Changes in Capitalized Exploratory Well Costs (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) well	Dec. 31, 2022 USD ($) well	Dec. 31, 2021 USD ($) well
Property, Plant and Equipment [Abstract]
Beginning balance	$ 886	$ 681	$ 459
Additions to capitalized exploratory well costs pending the determination of proved reserves	257	298	222
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	(133)	(93)	0
Capitalized exploratory well costs charged to expense	(58)	0	0
Ending balance	$ 952	$ 886	$ 681
Exploration and appraisal wells | well	43	43	35