Impairment (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Asset Impairment Charges Line Items [Line Items]
Impairment	$ 132	$ 0		$ 132	$ 82
Conger Field in the Gulf of Mexico
Asset Impairment Charges Line Items [Line Items]
Impairment	92
Impairment, after tax	92
Uneconomic Properties in the Gulf of Mexico
Asset Impairment Charges Line Items [Line Items]
Impairment	40
Impairment, after tax	$ 38
West Delta Field in the Gulf of Mexico
Asset Impairment Charges Line Items [Line Items]
Impairment			$ 82
Impairment, after tax			$ 82