Asset Retirement Obligations - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) u_hesLease	Dec. 31, 2020 USD ($)
Asset Retirement Obligations [Line Items]
Number of offshore Gulf of Mexico leases abandoned | u_hesLease	7
Liabilities incurred | $	$ 229	$ 36
Fair value of sinking fund deposits legally restricted for purposes of settling asset retirement obligations | $	$ 233	$ 207
West Delta 79/86 Field
Asset Retirement Obligations [Line Items]
Number of offshore Gulf of Mexico leases abandoned | u_hesLease	7
Number of leases received decommissioning orders | u_hesLease	6
Liabilities incurred | $	$ 147