Condensed Consolidated Statements of Comprehensive (Loss) Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Net (loss) income	$ (36.7)	$ 12.6
Other comprehensive income, net of tax:
Foreign currency translation loss, net of tax of ($0.1)	(0.2)	0
Defined benefit pension and postretirement plans:
Amortization of prior service benefits, net of tax of ($1.2), ($1.2)	(2.0)	(2.1)
Amortization of net actuarial loss, net of tax of $2.8, $2.0	4.8	3.5
Other comprehensive income	2.6	1.4
Total comprehensive (loss) income	$ (34.1)	$ 14.0