Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets [Abstract]
Proved oil and gas properties carrying amount	$ 146	$ 27	$ 1,587
Assets written down during the period - fair value at end of period	26	7	319
Pretax impairment charges	120	20	1,268
Pretax impairment charge for a commodity price-related write-down			$ 72
Debt Disclosure [Abstract]
Aggregate principal amount of current and long-term debt	4,890	4,890
Estimated fair value of debt	$ 4,740	$ 5,577