Unaudited Condensed Consolidated Statements of Operations - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues
Revenues	$ 1,149.0	$ 1,309.4	$ 2,399.6	$ 2,772.1
Costs and expenses
Operating costs and expenses (exclusive of items shown separately below)	858.2	946.5	1,806.6	2,003.7
Depreciation, depletion and amortization	165.4	163.9	337.9	333.5
Asset retirement obligation expenses	15.3	13.2	29.1	25.5
Selling and administrative expenses	38.9	44.1	75.6	81.1
Transaction costs related to business combinations and joint ventures	1.6	0.0	1.6	0.0
Other operating (income) loss:
Net (gain) loss on disposals	(0.2)	1.6	(1.7)	(29.0)
Provision for North Goonyella equipment loss	0.0	0.0	24.7	0.0
North Goonyella insurance recovery	0.0	0.0	(125.0)	0.0
Income from equity affiliates	(9.7)	(25.2)	(13.2)	(47.2)
Operating profit	79.5	165.3	264.0	404.5
Interest expense	36.0	38.3	71.8	74.6
Loss on early debt extinguishment	0.0	2.0	0.0	2.0
Interest income	(7.2)	(7.0)	(15.5)	(14.2)
Net periodic benefit costs, excluding service cost	4.8	4.6	9.7	9.1
Reorganization items, net	0.0	0.0	0.0	(12.8)
Income from continuing operations before income taxes	45.9	127.4	198.0	345.8
Income tax provision	3.0	7.4	21.8	17.5
Income from continuing operations, net of income taxes	42.9	120.0	176.2	328.3
Loss from discontinued operations, net of income taxes	(3.4)	(3.6)	(6.8)	(4.9)
Net income	39.5	116.4	169.4	323.4
Less: Series A Convertible Preferred Stock dividends	0.0	0.0	0.0	102.5
Less: Net income attributable to noncontrolling interests	2.4	2.7	8.1	0.6
Net income attributable to common stockholders	$ 37.1	$ 113.7	$ 161.3	$ 220.3
Income from continuing operations:
Basic income per share (in dollars per share)	$ 0.38	$ 0.94	$ 1.56	$ 1.78
Diluted income per share (in dollars per share)	0.37	0.93	1.54	1.76
Net income attributable to common stockholders:
Basic income per share (in dollars per share)	0.35	0.91	1.50	1.74
Diluted income per share (in dollars per share)	$ 0.34	$ 0.90	$ 1.48	$ 1.72