CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 55.4	$ 43.6
Other comprehensive income, net of tax:
Foreign currency translation adjustments	4.4	20.0
Defined benefit pension and other postretirement plan adjustments, net of tax of $0 and $(0.3)	(0.3)	(0.7)
Net (loss) gain on derivatives, net of tax of $(1.6) and $0.8	(3.3)	2.2
Other comprehensive income, net of tax	0.8	21.5
Comprehensive income	$ 56.2	$ 65.1