Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues
Sales	$ 1,076.8	$ 1,277.4	$ 2,861.9	$ 3,922.9
Other revenues	130.3	141.5	412.6	373.2
Total revenues	1,207.1	1,418.9	3,274.5	4,296.1
Costs and expenses
Operating costs and expenses (exclusive of items shown separately below)	1,064.8	1,254.0	2,981.2	3,774.4
Depreciation, depletion and amortization	117.8	136.0	345.5	430.6
Asset retirement obligation expenses	12.7	12.3	37.3	40.4
Selling and administrative expenses	32.1	37.8	114.6	128.8
Restructuring charges	0.3	1.8	15.5	23.0
Other operating (income) loss:
Net gain on disposal of assets	(1.9)	(7.9)	(17.4)	(20.2)
Asset impairment	0.0	0.0	17.2	900.8
Loss from equity affiliates	2.9	5.3	12.6	12.3
Operating loss	(21.6)	(20.4)	(232.0)	(994.0)
Interest expense	58.5	118.5	243.7	344.0
Loss on early debt extinguishment	0.0	0.0	0.0	67.8
Interest income	(1.3)	(1.4)	(4.0)	(6.6)
Reorganization Items, net	29.7	0.0	125.1	0.0
Loss from continuing operations before income taxes	(108.5)	(137.5)	(596.8)	(1,399.2)
Income tax (benefit) provision	(12.9)	6.9	(108.7)	(83.2)
Loss from continuing operations, net of income taxes	(95.6)	(144.4)	(488.1)	(1,316.0)
Loss from discontinued operations, net of income taxes	38.1	157.5	44.5	202.7
Net loss	(133.7)	(301.9)	(532.6)	(1,518.7)
Less: Net income attributable to noncontrolling interests	1.8	2.8	3.5	7.9
Net loss attributable to common stockholders	$ (135.5)	$ (304.7)	$ (536.1)	$ (1,526.6)
Loss from continuing operations:
Basic loss per share	$ (5.32)	$ (8.08)	$ (26.88)	$ (73.05)
Diluted loss per share	(5.32)	(8.08)	(26.88)	(73.05)
Net loss attributable to common stockholders:
Basic loss per share	(7.41)	(16.73)	(29.31)	(84.23)
Diluted loss per share	(7.41)	(16.73)	(29.31)	(84.23)
Dividends declared per share	$ 0.0000	$ 0.0000	$ 0.0000	$ 0.0750