Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues
Revenues	$ 1,106.4	$ 1,412.6	$ 3,506.0	$ 4,184.7
Costs and expenses
Operating costs and expenses (exclusive of items shown separately below)	906.2	1,047.9	2,712.8	3,051.6
Depreciation, depletion and amortization	141.5	169.6	479.4	503.1
Asset retirement obligation expenses	15.5	12.4	44.6	37.9
Selling and administrative expenses	32.2	38.6	107.8	119.7
Transaction costs related to business combinations and joint ventures	8.2	2.5	9.8	2.5
Other operating (income) loss:
Net gain on disposals	(1.1)	(20.8)	(2.8)	(49.8)
Asset impairment	20.0	0.0	20.0	0.0
Provision for North Goonyella equipment loss	0.0	49.3	24.7	49.3
North Goonyella insurance recovery	0.0	0.0	(125.0)	0.0
Loss (income) from equity affiliates	20.7	(17.2)	7.5	(64.4)
Operating (loss) profit	(36.8)	130.3	227.2	534.8
Interest expense	35.4	38.2	107.2	112.8
Loss on early debt extinguishment	0.0	0.0	0.0	2.0
Interest income	(7.0)	(10.1)	(22.5)	(24.3)
Net periodic benefit costs, excluding service cost	4.9	4.5	14.6	13.6
Reorganization items, net	0.0	0.0	0.0	(12.8)
(Loss) income from continuing operations before income taxes	(70.1)	97.7	127.9	443.5
Income tax provision	4.2	13.8	26.0	31.3
(Loss) income from continuing operations, net of income taxes	(74.3)	83.9	101.9	412.2
Loss from discontinued operations, net of income taxes	(3.8)	(4.1)	(10.6)	(9.0)
Net (loss) income	(78.1)	79.8	91.3	403.2
Less: Series A Convertible Preferred Stock dividends	0.0	0.0	0.0	102.5
Less: Net income attributable to noncontrolling interests	4.7	8.3	12.8	8.9
Net (loss) income attributable to common stockholders	$ (82.8)	$ 71.5	$ 78.5	$ 291.8
(Loss) income from continuing operations:
Basic (loss) income per share (in dollars per share)	$ (0.77)	$ 0.64	$ 0.84	$ 2.43
Diluted (loss) income per share (in dollars per share)	(0.77)	0.63	0.83	2.40
Net (loss) income attributable to common stockholders:
Basic (loss) income per share (in dollars per share)	(0.81)	0.60	0.74	2.36
Diluted (loss) income per share (in dollars per share)	$ (0.81)	$ 0.59	$ 0.73	$ 2.33