Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Statement Of Income And Comprehensive Income [Abstract]
Net Income/(loss)	$ 39.2	$ (116.6)
Other Comprehensive income:
Change in fair value of interest rate swap, net of tax		(11.7)
Reclassification of interest rate swap, net of tax	2.4
Pension liability adjustment, net of tax		(0.1)
Change in fair value of net investment hedge, net of tax		31.3
Foreign currency translation adjustment	(43.0)	(58.4)
Total other comprehensive income/(loss):	(40.6)	(38.9)
Comprehensive income/(loss)	$ (1.4)	$ (155.5)