CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating Revenues:
Total operating revenues	$ 410	$ 667	$ 1,002	$ 1,657
Operating Costs and Expenses:
Operating expenses	182	169	375	334
General and administrative expenses	32	40	58	77
Loss on sale of operating assets	0	3	0	3
Restructuring charges	2	2	12	5
Depreciation, depletion and amortization	84	115	197	227
Impairments	655	6	2,134	6
Taxes, other than income taxes	10	17	23	36
Total operating costs and expense	1,166	645	3,248	1,422
Operating Income (Loss)	(756)	22	(2,246)	235
Interest Expense:
Interest on debt	40	41	80	83
Other interest charges	3	2	5	3
Interest capitalized	(21)	(28)	(44)	(57)
Total Interest Expense	22	15	41	29
Gain (Loss) on Derivatives	(109)	152	230	120
Gain on Early Extinguishment of Debt	7	0	35	0
Other Income (Loss), Net	0	(6)	1	(5)
Income (Loss) Before Income Taxes	(880)	153	(2,021)	321
Provision (Benefit) for Income Taxes:
Current	0	0	(2)	0
Deferred	0	15	408	(411)
Total Provision (Benefit) from Income Taxes	0	15	406	(411)
Net Income (Loss)	$ (880)	$ 138	$ (2,427)	$ 732
Earnings (Loss) Per Common Share:
Basic (in dollars per share)	$ (1.63)	$ 0.26	$ (4.49)	$ 1.36
Diluted (in dollars per share)	$ (1.63)	$ 0.26	$ (4.49)	$ 1.35
Weighted Average Common Shares Outstanding:
Basic (in shares)	541,079,192	539,005,941	540,693,841	539,362,984
Diluted (in shares)	541,079,192	539,947,053	540,693,841	540,624,742
Gas sales
Operating Revenues:
Total operating revenues	$ 164	$ 275	$ 412	$ 705
Oil sales
Operating Revenues:
Total operating revenues	19	47	71	86
NGL sales
Operating Revenues:
Total operating revenues	40	58	90	139
Marketing
Operating Revenues:
Total operating revenues	187	287	426	725
Other
Operating Revenues:
Total operating revenues	0	0	3	2
Marketing purchases
Operating Costs and Expenses:
Marketing purchases	$ 201	$ 293	$ 449	$ 734