Dispositions (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($) a	Dec. 31, 2020 USD ($)	Nov. 30, 2022	Nov. 30, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales	$ 178	$ 427	$ 493
Gain (loss) on asset sales, pre-tax	101	29	87
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
Gain (loss) on asset sales, pre-tax	76
Gain (loss) on asset sale, after income taxes	76
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
Gain (loss) on asset sales, pre-tax	22
Gain (loss) on asset sale, after income taxes	$ 22
Interests in Denmark
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales		130
Gain (loss) on asset sales, pre-tax		29
Gain (loss) on asset sale, after income taxes		29
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
Developed and undeveloped acreage sold | a		78,700
Interest in Shenzi Field
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from asset sales			482
Gain (loss) on asset sales, pre-tax			79
Gain (loss) on asset sale, after income taxes			$ 79
Participation interest percentage					28.00%