Condensed Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 2.6	$ 3.6
Other comprehensive income (loss), net of tax:
Defined benefit plans adjustments	0.1	0.1
Foreign currency translation adjustment (losses) gains	(0.5)	0.3
Other comprehensive (loss) income, net of tax	(0.4)	0.4
Comprehensive income	$ 2.2	$ 4.0