Impairment and Other (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) u_hesLease
Impairments [Line Items]
Impairment and other charge, pre-tax	$ 82	$ 54	$ 147
Number of offshore Gulf of Mexico leases abandoned | u_hesLease			7
West Delta Field in the Gulf of Mexico
Impairments [Line Items]
Impairment and other charge, pre-tax	82		$ 147
Impairment and other charge, after income taxes	$ 82		$ 147
Oil and Gas Properties | Non-Producing Properties in Gulf of Mexico
Impairments [Line Items]
Impairment and other charge, pre-tax		28
Impairment and other charge, after income taxes		28
Oil and Gas Properties | Penn State Field in Gulf of Mexico
Impairments [Line Items]
Impairment and other charge, pre-tax		26
Impairment and other charge, after income taxes		$ 26