Consolidated Statements Of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 61.6	$ 43.8	$ 63.5
Other comprehensive income (loss):
Change in foreign currency translation adjustment	10.5	0.3	(13.5)
Change in unrecognized net actuarial losses related to pension benefit plans, net of income tax expense (benefit) of $1.3, $(2.1) and $1.6, respectively	3.6	(3.4)	4.2
Change in unrealized net gain on derivatives, net of income tax expense (benefit) of $0.6, $(0.1) and $0.0, respectively	1.0	(0.1)	0.0
Total other comprehensive income (loss)	15.1	(3.2)	(9.3)
Comprehensive income	$ 76.7	$ 40.6	$ 54.2