CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 26.9	$ 213.9	$ 24.8	$ 313.5
Other comprehensive income (loss), net of tax:
Employee pension and postretirement benefits	0.4	1.1	0.8	2.3
Currency translation adjustments	(33.9)	7.7	(40.4)	(12.3)
Change in fair value of derivative instruments	4.4	0.3	5.2	0.7
Total other comprehensive income (loss), net of tax	(29.1)	9.1	(34.4)	(9.3)
Comprehensive income (loss)	$ (2.2)	$ 223.0	$ (9.6)	$ 304.2