Asset Retirement Obligations - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Asset Retirement Obligations [Line Items]
Revisions of estimated liabilities	$ 113	$ 148
Fair value of sinking fund deposits legally restricted for purposes of settling asset retirement obligations	$ 327	294
West Delta Field in the Gulf of America
Asset Retirement Obligations [Line Items]
Revisions of estimated liabilities		$ 82