Acquisitions, Divestitures and Restructuring Activities - Pro Forma Summary (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Business Combinations [Abstract]
Total revenues and other income	$ 4,463	$ 1,731	$ 10,326	$ 4,829
Net income (loss) attributable to common stockholders	$ 1,045	(85)	1,355	(243)
Parsley Energy, Inc. and DoublePoint
Business Acquisition [Line Items]
Revenues and other income		2,168	10,373	6,797
Net income (loss)		$ (40)	$ 1,210	$ (3,870)