Other Financial Information (Property Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Jan. 15, 2021	Dec. 31, 2020
Capitalized costs, proved properties	$ 114,274		$ 94,312
Capitalized costs, unproved properties	10,993		4,141
Other	4,379		3,653
Gross properties, plants and equipment	129,646		102,106
Accumulated DD&A	(64,735)		(62,213)
Property, plant and equipment, net	64,911		$ 39,893
Concho Resources Incorporated [Member]
Capitalized costs, proved properties	20,000	$ 11,800
Capitalized costs, unproved properties	$ 6,900	$ 6,900