CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018		Jun. 30, 2019	Jun. 30, 2018
Operating Revenues:
Total operating revenues	$ 667	$ 816		$ 1,657	$ 1,736
Operating Costs and Expenses:
Operating expenses	169	193		334	382
General and administrative expenses	40	59		77	114
Loss on sale of operating assets	3	0		3	0
Restructuring charges	2	18		5	18
Depreciation, depletion and amortization	121	142		233	285
Taxes, other than income taxes	17	15		36	38
Total operating costs and expense	645	692		1,422	1,357
Operating Income	22	124		235	379
Interest Expense:
Interest on debt	41	59		83	124
Other interest charges	2	2		3	4
Interest capitalized	(28)	(29)		(57)	(57)
Total Interest Expense	15	32		29	71
Gain (Loss) on Derivatives	152	(36)		120	(43)
Loss on Early Extinguishment of Debt	0	(8)		0	(8)
Other Income (Loss), Net	(6)	3		(5)	2
Income Before Income Taxes	153	51		321	259
Provision (Benefit) for Income Taxes
Current	0	0		0	0
Deferred	15	0		(411)	0
Total Provision (Benefit) from Income Taxes	15	0		(411)	0
Net Income	138	51	[1]	732	259	[1]
Participating securities - mandatory convertible preferred stock	0	0		0	2
Net Income Attributable to Common Stock	$ 138	$ 51		$ 732	$ 257
Earnings Per Common Share
Basic (in dollars per share)	$ 0.26	$ 0.09		$ 1.36	$ 0.45
Diluted (in dollars per share)	$ 0.26	$ 0.09		$ 1.35	$ 0.44
Weighted Average Common Shares Outstanding:
Basic (in shares)	539,005,941	581,159,200		539,362,984	576,255,744
Diluted (in shares)	539,947,053	582,878,106		540,624,742	578,222,740
Gas sales
Operating Revenues:
Total operating revenues	$ 275	$ 407		$ 705	$ 947
Oil sales
Operating Revenues:
Total operating revenues	47	44		86	79
NGL sales
Operating Revenues:
Total operating revenues	58	75		139	140
Marketing
Operating Revenues:
Total operating revenues	287	265		725	518
Gas gathering
Operating Revenues:
Total operating revenues	0	24		0	48
Other
Operating Revenues:
Total operating revenues	0	1		2	4
Marketing purchases
Operating Costs and Expenses:
Marketing purchases	$ 293	$ 265		$ 734	$ 520

[1] In 2018, deferred tax activity incurred in other comprehensive income was offset by a valuation allowance.