Consolidated Statements Of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Other Comprehensive Income [Abstract]
Net (loss) income	$ (139.4)	$ 72.2	$ 206.1
Foreign currency translation adjustments net of tax	4.1	(8.5)	2.4
Less: Reclassification of realized foreign currency translation loss included in net income (includes income tax benefit of $0.5)		1.0
Foreign currency translation adjustments, net	4.1	(7.5)	2.4
Defined benefit pension adjustments, net of tax	0.3	(0.1)	(0.2)
Other comprehensive income (loss), net of tax	4.4	(7.6)	2.2
Comprehensive (loss) income	$ (135.0)	$ 64.6	$ 208.3