Suspended Well Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net changes in capitalized exploratory well costs
Beginning balance	$ 33	$ 71	$ 49
Additions to capitalized exploratory well costs pending the determination of net proved reserves	22	33	71
Reclassifications based on the determination of net proved reserves	(33)	(67)	(48)
Capitalized exploratory well costs charged to expense (1)	0	(4)	0
Ending balance	22	$ 33	$ 71
Exploratory well costs capitalized for more than one year	$ 0