Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 5.7	$ 5.5
Other comprehensive income (loss), net of tax:
Defined benefit plan adjustments	0.1	0.1
Foreign currency translation gain (loss)	1.9	(2.7)
Other comprehensive income (loss), net of tax	2.0	(2.6)
Comprehensive income	$ 7.7	$ 2.9