Impairment Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Impairment of Oil and Gas Properties [Line Items]
Impairment of oil and gas properties	$ 202	$ 382	$ 376
Proved Properties
Impairment of Oil and Gas Properties [Line Items]
Impairment of oil and gas properties	44	120	20
Unproved Properties
Impairment of Oil and Gas Properties [Line Items]
Impairment of oil and gas properties	125	206	310
Impairment of oil and gas properties due to exit activities			38
Other Assets
Impairment of Oil and Gas Properties [Line Items]
Impairment of oil and gas properties	31	29	28
Inventories
Impairment of Oil and Gas Properties [Line Items]
Impairment of oil and gas properties	0	25	13
Firm Commitments Contracts
Impairment of Oil and Gas Properties [Line Items]
Impairment of oil and gas properties	$ 2	$ 2	$ 5