Income Tax Expense - Components of Income Before Tax and Provision for Income Taxes (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Components of income (loss) before income taxes
United States	$ (170.3)	$ (98.2)	$ (86.1)
Foreign	27.0	75.0	98.7
Net (loss) income from continuing operations before income taxes	(143.3)	(23.2)	12.6
Current
U.S. Federal	0	(0.1)	0.5
U.S. State	(0.6)	(0.1)	0.2
Foreign	13.6	16.0	15.9
Total	13.0	15.8	16.6
Deferred
U.S. Federal	(119.1)	3.2	2.0
U.S. State	(9.4)	0.7	0.1
Foreign	(2.2)	1.0	(0.3)
Total	(130.7)	4.9	1.8
Total income tax (benefit) expense	$ (117.7)	$ 20.7	$ 18.4