CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Operating Revenues:
Gas sales	$ 1,273	$ 1,946	$ 2,827
Oil sales	69	76	19
NGL sales	92	73	3
Marketing	864	863	996
Gas gathering	138	175	193
Total Operating Revenues	2,436	3,133	4,038
Operating Costs and Expenses:
Marketing purchases	864	852	980
Operating expenses	592	689	427
General and administrative expenses	247	246	221
Restructuring charges	78
Depreciation, depletion and amortization	436	1,091	942
Impairment of natural gas and oil properties	2,321	6,950
Gain on sale of assets, net		(283)
Taxes, other than income taxes	93	110	95
Total Operating Costs and Expenses	4,631	9,655	2,665
Operating Income (Loss)	(2,195)	(6,522)	1,373
Interest Expense:
Interest on debt	226	200	101
Other interest charges	14	60	13
Interest capitalized	(152)	(204)	(55)
Total Interest Expense	88	56	59
Gain (Loss) on Derivatives	(339)	47	139
Loss on Early Extinguishment of Debt	(51)
Other Income (Loss), Net	1	(30)	(4)
Income (Loss) Before Income Taxes	(2,672)	(6,561)	1,449
Provision (Benefit) for Income Taxes:
Current	(7)	(2)	21
Deferred	(22)	(2,003)	504
Provision (Benefit) for Income Taxes	(29)	(2,005)	525
Net Income (Loss)	(2,643)	(4,556)	924
Mandatory convertible preferred stock dividend	108	106
Net Income (Loss) Attributable to Common Stock	$ (2,751)	$ (4,662)	$ 924
Earnings (Loss) Per Common Share:
Basic	$ (6.32)	$ (12.25)	$ 2.63
Diluted	$ (6.32)	$ (12.25)	$ 2.62
Weighted Average Common Shares Outstanding:
Basic	435,337,402	380,521,039	351,446,747
Diluted	435,337,402	380,521,039	352,410,683