Exploratory Well Costs (Details) $ in Millions		12 Months Ended
		Dec. 31, 2022 USD ($) well	Dec. 31, 2021 USD ($) well	Dec. 31, 2020 USD ($) well
Increase (Decrease) in Capitalized Exploratory Well Costs that are Pending Determination of Proved Reserves [Roll Forward]
Beginning balance		$ 7	$ 29	$ 26
Additions Pending the Determination of Proved Reserves		135	73	108
Reclassifications to Proved Properties		(88)	(41)	(81)
Costs Charged to Expense	[1]	(39)	(54)	(24)
Ending balance		15	7	29
Capitalized exploratory well costs that have been capitalized for a period of one year or less		15	7	26
Capitalized exploratory well costs that have been capitalized for a period greater than one year		$ 0	$ 0	$ 3	[2]
Number of exploratory wells that have been capitalized for a period greater than one year | well		0	0	1

[1] Includes capitalized exploratory well costs charged to either dry hole costs or impairments.

[2] (1)    Consists of costs related to a project in the United States at December 31, 2020.