CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Operating Revenues:
Gas sales	$ 394.0	$ 340.0	$ 1,368.0	$ 906.0
Oil sales	27.0	19.0	73.0	50.0
NGL sales	55.0	22.0	132.0	59.0
Marketing	233.0	237.0	736.0	631.0
Gas gathering	28.0	33.0	85.0	106.0
Total Operating Revenues	737.0	651.0	2,394.0	1,752.0
Operating Costs and Expenses:
Marketing purchases	236.0	234.0	740.0	627.0
Operating expenses	170.0	139.0	481.0	455.0
General and administrative expenses	62.0	61.0	170.0	171.0
Restructuring charges		2.0		77.0
Depreciation, depletion and amortization	135.0	99.0	364.0	349.0
Impairment of natural gas and oil properties		817.0		2,321.0
Taxes, other than income taxes	24.0	24.0	75.0	69.0
Total Operating Costs and Expenses	627.0	1,376.0	1,830.0	4,069.0
Operating Income (Loss)	110.0	(725.0)	564.0	(2,317.0)
Interest Expense:
Interest on debt	58.0	59.0	175.0	168.0
Other interest charges	2.0	8.0	7.0	12.0
Interest capitalized	(29.0)	(41.0)	(85.0)	(123.0)
Total Interest Expense	31.0	26.0	97.0	57.0
Gain (Loss) on Derivatives	45.0	71.0	295.0	(28.0)
Loss on Early Extinguishment of Debt	(59.0)	(51.0)	(70.0)	(51.0)
Other Income (Loss), Net	(2.0)	3.0	6.0
Income (Loss) Before Income Taxes	63.0	(728.0)	698.0	(2,453.0)
Benefit for Income Taxes:
Current	(10.0)		(10.0)
Deferred	(4.0)	(20.0)	(4.0)	(20.0)
Benefit for Income Taxes	(14.0)	(20.0)	(14.0)	(20.0)
Net Income (Loss)	77.0	(708.0)	712.0	(2,433.0)
Mandatory convertible preferred stock dividend	27.0	27.0	81.0	81.0
Participating securities - mandatory convertible preferred stock	7.0		83.0
Net Income (Loss) Attributable to Common Stock	$ 43.0	$ (735.0)	$ 548.0	$ (2,514.0)
Earnings (Loss) Per Common Share:
Basic	$ 0.09	$ (1.52)	$ 1.11	$ (6.02)
Diluted	$ 0.09	$ (1.52)	$ 1.10	$ (6.02)
Weighted Average Common Shares Outstanding:
Basic	499,812,926	482,485,150	496,458,435	417,222,661
Diluted	502,290,779	482,485,150	498,527,671	417,222,661