Dispositions (Detail)	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) a	Nov. 30, 2022
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales	$ 3,000,000	$ 178,000,000	$ 427,000,000
Gain (loss) on asset sales, pre-tax	$ 2,000,000	101,000,000	29,000,000
Interest in Waha Concession in Libya
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales		150,000,000
Gain (loss) on asset sales, pre-tax		76,000,000
Gain (loss) on asset sale, after income taxes		76,000,000
Participation interest percentage				8.00%
Former Downstream Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales		24,000,000
Gain (loss) on asset sales, pre-tax		22,000,000
Gain (loss) on asset sale, after income taxes		$ 22,000,000
Interests in Denmark
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales			130,000,000
Gain (loss) on asset sales, pre-tax			29,000,000
Gain (loss) on asset sale, after income taxes			29,000,000
Little Knife & Murphy Creek Acreage Interests in Bakken
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales			297,000,000
Gain (loss) on asset sales, pre-tax			$ 0
Developed and undeveloped acreage sold | a			78,700