CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Operating Revenues:
Total operating revenues	$ 990	$ 920
Operating Costs and Expenses:
Operating expenses	165	189
General and administrative expenses	37	55
Restructuring charges	3	0
Depreciation, depletion and amortization	112	143
Taxes, other than income taxes	19	23
Total operating costs and expense	777	665
Operating Income	213	255
Interest Expense:
Interest on debt	42	65
Other interest charges	1	2
Interest capitalized	(29)	(28)
Total Interest Expense	14	39
Loss on Derivatives	(32)	(7)
Other Income (Loss), Net	1	(1)
Income Before Income Taxes	168	208
Benefit from Income Taxes:
Current	0	0
Deferred	(426)	0
Total Benefit from Income Taxes	(426)	0
Net Income	594	208
Participating securities - mandatory convertible preferred stock	0	3
Net Income Attributable to Common Stock	$ 594	$ 205
Earnings Per Common Share:
Basic (in dollars per share)	$ 1.10	$ 0.36
Diluted (in dollars per share)	$ 1.10	$ 0.36
Weighted Average Common Shares Outstanding:
Basic (in shares)	539,721,751	571,297,804
Diluted (in shares)	541,320,487	573,844,459
Gas sales
Operating Revenues:
Total operating revenues	$ 430	$ 540
Oil sales
Operating Revenues:
Total operating revenues	39	35
NGL sales
Operating Revenues:
Total operating revenues	81	65
Marketing
Operating Revenues:
Total operating revenues	438	253
Gas gathering
Operating Revenues:
Total operating revenues	0	24
Other
Operating Revenues:
Total operating revenues	2	3
Marketing purchases
Operating Costs and Expenses:
Marketing purchases	$ 441	$ 255