CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Revenues:
Gas sales	$ 1,946	$ 2,827	$ 2,381
Oil sales	76	19	14
NGL sales	73	3	2
Marketing	863	996	792
Gas gathering	175	193	182
Total Operating Revenues	3,133	4,038	3,371
Operating Costs and Expenses:
Marketing purchases	852	980	782
Operating expenses	689	427	328
General and administrative expenses	246	221	191
Depreciation, depletion and amortization	1,091	942	787
Impairment of natural gas and oil properties	6,950
Gain on sale of assets, net	(283)
Taxes, other than income taxes	110	95	79
Total Operating Costs and Expenses	9,655	2,665	2,167
Operating Income (Loss)	(6,522)	1,373	1,204
Interest Expense:
Interest on debt	200	101	100
Other interest charges	60	13	4
Interest capitalized	(204)	(55)	(62)
Total Interest Expense	56	59	42
Other Income (Loss), Net	(30)	(4)	2
Gain on Derivatives	47	139	26
Income (Loss) Before Income Taxes	(6,561)	1,449	1,190
Provision (Benefit) for Income Taxes:
Current	(2)	21	(11)
Deferred	(2,003)	504	497
Provision (Benefit) for Income Taxes	(2,005)	525	486
Net Income (Loss)	(4,556)	924	704
Mandatory convertible preferred stock dividend	106
Net Income (Loss) Attributable to Common Stock	$ (4,662)	$ 924	$ 704
Earnings (Loss) Per Common Share:
Basic	$ (12.25)	$ 2.63	$ 2.01
Diluted	$ (12.25)	$ 2.62	$ 2.00
Weighted Average Common Shares Outstanding:
Basic	380,521,039	351,446,747	350,465,430
Diluted	380,521,039	352,410,683	351,101,452