Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues
Sales	$ 1,470.2	$ 1,577.2
Other revenues	156.6	170.8
Total revenues	1,626.8	1,748.0
Costs and expenses
Operating costs and expenses (exclusive of items shown separately below)	1,394.8	1,389.4
Depreciation, depletion and amortization	157.2	170.7
Asset retirement obligation expenses	15.6	19.0
Selling and administrative expenses	59.5	65.1
Other operating (income) loss:
Net gain on disposal or exchange of assets	(9.8)	(2.6)
Loss from equity affiliates	6.6	17.6
Operating profit	2.9	88.8
Interest expense	103.3	101.3
Interest income	(3.6)	(5.9)
Loss from continuing operations before income taxes	(96.8)	(6.6)
Income tax (benefit) provision	(52.5)	3.7
Loss from continuing operations, net of income taxes	(44.3)	(10.3)
Income (loss) from discontinued operations, net of income taxes	0.2	(9.1)
Net loss	(44.1)	(19.4)
Less: Net income attributable to noncontrolling interests	4.4	4.0
Net loss attributable to common stockholders	$ (48.5)	$ (23.4)
Loss from continuing operations:
Basic loss per share	$ (0.18)	$ (0.05)
Diluted loss per share	$ (0.18)	$ (0.05)
Net loss attributable to common stockholders:
Basic loss per share	$ (0.18)	$ (0.09)
Diluted loss per share	$ (0.18)	$ (0.09)
Dividends declared per share	$ 0.085	$ 0.085