Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 12.5	$ 8.5	$ 31.2	$ 31.2
Other comprehensive income (loss):
Change in foreign currency translation adjustment	3.3	(0.9)	9.5	5.1
Change in unrecognized net actuarial losses related to pension benefit plans, net of income tax expense of $0.2, $0.7, $0.7 and $2.2, respectively	(0.1)	1.3	0.0	5.1
Change in unrealized net gain on derivatives, net of income tax expense (benefit) of $0.0, $0.0, $0.2 and $(0.1), respectively	0.2	0.0	0.4	(0.1)
Total other comprehensive income	3.4	0.4	9.9	10.1
Comprehensive income	$ 15.9	$ 8.9	$ 41.1	$ 41.3