Other Expense - Schedule of Components of Other Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Restructuring Cost and Reserve [Line Items]
Parsley Acquisition transaction costs (a)	$ 3	$ 0	$ 209	$ 0
Winter Storm Uri gas commitments (b)	0	0	80	0
DoublePoint Acquisition transaction costs (c)	5	0	32	0
Unoccupied facility expense (d)	10	0	26	(1)
Transportation commitment charges (e)	5	4	15	12
Termination and idle drilling and frac equipment charges (f)	0	16	5	69
Loss on early extinguishment of debt, net	0	0	2	27
Restructuring charges (Note 3)	0	74	1	75
South Texas deficiency fee obligation	0	0	0	69
Vertical integration services loss (income), net (g)	2	(2)	(4)	(1)
Other	9	6	18	23
Total other expense	34	98	384	273
Gross revenues	9	11	32	36
Gross costs and expenses	11	$ 9	28	$ 35
Parsley | Employee related costs
Restructuring Cost and Reserve [Line Items]
Parsley Acquisition transaction costs (a)			90
Parsley | Transaction related fees
Restructuring Cost and Reserve [Line Items]
Parsley Acquisition transaction costs (a)	$ 3		$ 119