CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 187.3	$ 91.2	$ 338.5	$ 165.5
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	5.7	13.0	(22.7)	(34.3)
Defined benefit pension and other postretirement plan adjustments, net of tax of $0, $(1.7), $0.2, and $(1.1), respectively	0.1	(5.8)	0.7	(3.8)
Net (loss) gain on derivatives, net of tax of $0.8, $(1.5), $0 and $(0.2), respectively	1.2	(2.7)	(0.6)	(0.1)
Other comprehensive income (loss), net of tax	7.0	4.5	(22.6)	(38.2)
Comprehensive income	$ 194.3	$ 95.7	$ 315.9	$ 127.3