CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 66.1	$ 56.1	$ 121.5	$ 99.7
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(0.7)	(49.6)	3.7	(29.6)
Defined benefit pension and other postretirement plan adjustments, net of tax of $0, $0.4, $0 and $0.1, respectively	0.1	1.0	(0.2)	0.3
Net gain (loss) on derivatives, net of tax of $0.8, $0.3, $(0.8), and $1.1, respectively	1.8	0.7	(1.5)	2.9
Other comprehensive income (loss), net of tax	1.2	(47.9)	2.0	(26.4)
Comprehensive income	$ 67.3	$ 8.2	$ 123.5	$ 73.3