Property, Plant and Equipment - Net Changes in Capitalized Exploratory Well Costs (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) well	Dec. 31, 2021 USD ($) well	Dec. 31, 2020 USD ($) well
Property, Plant and Equipment [Abstract]
Beginning balance	$ 681	$ 459	$ 584
Additions to capitalized exploratory well costs pending the determination of proved reserves	298	222	111
Reclassifications to wells, facilities and equipment based on the determination of proved reserves	(93)	0	(111)
Capitalized exploratory well costs charged to expense	0	0	(125)
Ending balance	$ 886	$ 681	$ 459
Exploration and appraisal wells | well	43	35	22