CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Operating Revenues:
Gas sales	$ 471	$ 251	$ 974	$ 566
Oil sales	23	20	46	31
NGL sales	37	20	77	37
Marketing	250	196	503	394
Gas gathering	30	35	57	73
Total Operating Revenues	811	522	1,657	1,101
Operating Costs and Expenses:
Marketing purchases	253	197	504	393
Operating expenses	164	151	311	316
General and administrative expenses	58	56	108	110
Restructuring charges		11		75
Depreciation, depletion and amortization	123	107	229	250
Impairment of natural gas and oil properties		470		1,504
Taxes, other than income taxes	25	22	51	45
Total Operating Costs and Expenses	623	1,014	1,203	2,693
Operating Income (Loss)	188	(492)	454	(1,592)
Interest Expense:
Interest on debt	59	56	117	109
Other interest charges	3	2	5	4
Interest capitalized	(28)	(41)	(56)	(82)
Total Interest Expense	34	17	66	31
Gain (Loss) on Derivatives	134	(85)	250	(99)
Loss on Early Extinguishment of Debt	(10)		(11)
Other Income (Loss), Net	6		8	(3)
Income (Loss) Before Income Taxes	284	(594)	635	(1,725)
Benefit for Income Taxes:
Deferred		(1)
Net Income (Loss)	284	(593)	635	(1,725)
Mandatory convertible preferred stock dividend	27	27	54	54
Participating securities - mandatory convertible preferred stock	33		76
Net Income (Loss) Attributable to Common Stock	$ 224	$ (620)	$ 505	$ (1,779)
Earnings (Loss) Per Common Share:
Basic	$ 0.45	$ (1.61)	$ 1.02	$ (4.63)
Diluted	$ 0.45	$ (1.61)	$ 1.02	$ (4.63)
Weighted Average Common Shares Outstanding:
Basic	496,419,815	385,594,815	494,753,391	384,232,831
Diluted	498,224,599	385,594,815	496,627,843	384,232,831