CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement of Comprehensive Income [Abstract]
Net income	$ 661.8	$ 346.2	$ 241.7
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	(59.3)	40.1	4.9
Prior service cost arising during period, net of tax of $0.5	1.5	0.0	0.0
Net actuarial gain (loss) arising during period, net of tax of $2.1, $(0.7), and $(0.3)	5.9	(2.5)	(1.9)
Settlement effects arising during period, net of tax of $0.4, $0.9, and $0.8	1.4	2.9	2.7
Less: amortization of actuarial loss (gain), net of tax of $0.1, $0.0, and $0.0	0.1	(0.1)	(0.2)
Less: amortization of prior service credit, net of tax of $(0.1), $(0.1) and $(0.1).	(0.2)	(0.5)	(0.5)
Net gain (loss) on equity affiliate accumulated other comprehensive income, net of tax of $0.0, $0.0, and $0.0	0.9	0.2	0.0
Net gain (loss) on derivatives, net of tax of $0.5, $(0.6), and $(0.2)	0.7	(1.1)	(0.4)
Other comprehensive (loss) income, net of tax	(49.0)	39.0	4.6
Comprehensive income	$ 612.8	$ 385.2	$ 246.3