CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Operating Revenues:
Total operating revenues	$ 1,050	$ 410	$ 2,122	$ 1,002
Operating Costs and Expenses:
Operating expenses	259	182	509	375
General and administrative expenses	34	32	72	58
Merger-related expenses	3	0	4	0
Restructuring charges	1	2	7	12
Depreciation, depletion and amortization	100	84	196	197
Impairments	0	655	0	2,134
Taxes, other than income taxes	27	10	51	23
Total operating costs and expense	757	1,166	1,528	3,248
Operating Income (Loss)	293	(756)	594	(2,246)
Interest Expense:
Interest on debt	48	40	98	80
Other interest charges	3	3	6	5
Interest capitalized	(21)	(21)	(43)	(44)
Total interest expense	30	22	61	41
Gain (Loss) on Derivatives	(871)	(109)	(1,062)	230
Gain on Early Extinguishment of Debt	0	7	0	35
Other Income (Loss), Net	(1)	0	0	1
Loss Before Income Taxes	(609)	(880)	(529)	(2,021)
Provision (Benefit) for Income Taxes:
Current	0	0	0	(2)
Deferred	0	0	0	408
Total provision (benefit) from income taxes	0	0	0	406
Net Loss	$ (609)	$ (880)	$ (529)	$ (2,427)
Loss Per Common Share:
Basic (in dollars per share)	$ (0.90)	$ (1.63)	$ (0.78)	$ (4.49)
Diluted (in dollars per share)	$ (0.90)	$ (1.63)	$ (0.78)	$ (4.49)
Weighted Average Common Shares Outstanding:
Basic (in shares)	676,722,999	541,079,192	676,057,534	540,693,841
Diluted (in shares)	676,722,999	541,079,192	676,057,534	540,693,841
Gas sales
Operating Revenues:
Total operating revenues	$ 433	$ 164	$ 897	$ 412
Oil sales
Operating Revenues:
Total operating revenues	106	19	187	71
NGL sales
Operating Revenues:
Total operating revenues	179	40	352	90
Marketing
Operating Revenues:
Total operating revenues	332	187	684	426
Other
Operating Revenues:
Total operating revenues	0	0	2	3
Marketing purchases
Operating Costs and Expenses:
Marketing purchases	$ 333	$ 201	$ 689	$ 449