Property, Plant and Equipment - Components of Property, Plant and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Total — at cost	$ 32,592,000	$ 31,178,000
Less: Reserves for depreciation, depletion, amortization and lease impairment	17,494,000	16,996,000
Property, Plant and Equipment— Net	15,098,000	14,182,000
Exploration and Production
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment— Net	6,764,000	6,596,000
Operating Segments | Exploration and Production
Property, Plant and Equipment [Line Items]
Unproved properties	149,000	184,000
Proved properties	2,660,000	2,877,000
Wells, equipment and related facilities	25,182,000	23,745,000
Total — at cost	27,991,000	26,806,000
Operating Segments | Midstream
Property, Plant and Equipment [Line Items]
Total — at cost	4,571,000	4,342,000
Corporate, Interest and Other
Property, Plant and Equipment [Line Items]
Total — at cost	30,000	30,000
Property, Plant and Equipment— Net	$ 8,000	$ 10,000