Supplementary Cash Flow Information - Schedule of Cash Flow Supplemental Disclosures (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows From Operating Activities
Interest paid	$ (459)	$ (460)	$ (380)
Net income taxes (paid) refunded	(16)	(64)	(417)
Cash Flows From Investing Activities
Additions to property, plant and equipment - E&P	(1,584)	(1,896)	(2,433)
Additions to property, plant and equipment - Midstream	(163)	(301)	(396)
Exploration and Production
Cash Flows From Investing Activities
Capital expenditures incurred	(1,698)	(1,678)	(2,576)
Increase (decrease) in related liabilities	114	(218)	143
Additions to property, plant and equipment - E&P	(1,584)	(1,896)	(2,433)
Midstream
Cash Flows From Investing Activities
Capital expenditures incurred	(183)	(253)	(416)
Increase (decrease) in related liabilities	20	(48)	20
Additions to property, plant and equipment - Midstream	$ (163)	$ (301)	$ (396)