Impairment and Other (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) u_hesLease	Dec. 31, 2020 USD ($)
West Delta 79/86 Field
Impairments [Line Items]
Loss contingency charge, pre-tax		$ 147
Loss contingency charge, after tax		$ 147
Number of offshore Gulf of Mexico leases abandoned | u_hesLease		7
Oil and Gas Properties | Non-Producing Properties in Gulf of Mexico
Impairments [Line Items]
Impairment charge, pre-tax	$ 28
Impairment charge, after income taxes	28
Oil and Gas Properties | Penn State Field in Gulf of Mexico
Impairments [Line Items]
Impairment charge, pre-tax	26
Impairment charge, after income taxes	$ 26
Oil and Gas Properties | North Malay Basin in Malaysia
Impairments [Line Items]
Impairment charge, pre-tax			$ 755
Impairment charge, after income taxes			755
Oil and Gas Properties | South Arne Field in Denmark
Impairments [Line Items]
Impairment charge, pre-tax			670
Impairment charge, after income taxes			594
Oil and Gas Properties | Stampede Field in Gulf of Mexico
Impairments [Line Items]
Impairment charge, pre-tax			410
Impairment charge, after income taxes			410
Oil and Gas Properties | Tubular Bells Field in Gulf of Mexico
Impairments [Line Items]
Impairment charge, pre-tax			270
Impairment charge, after income taxes			270
Other Assets
Impairments [Line Items]
Impairment charge, pre-tax			21
Impairment charge, after income taxes			$ 20