Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ (162.6)	$ 146.1	$ 131.0
Other comprehensive income (loss):
Foreign currency translation adjustments	274.4	28.4	(156.1)
Change in fair value of derivative financial instruments	(13.4)	28.2
Change in fair value of derivative financial instruments			(5.7)
Change in post-retirement and pension liability	(5.4)	(1.8)	(5.7)
Other comprehensive income (loss), net of tax	255.6	54.8	(167.5)
Comprehensive income (loss)	$ 93.0	$ 200.9	$ (36.5)