Restructuring - Restructuring Reserve (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restructuring and Related Activities [Abstract]
Beginning Balance	$ 78.0	$ 102.7	$ 71.5
Expense recorded	71.9	34.4	79.8
Payments made	(99.8)	(57.3)	(46.4)
Foreign currency translation	5.7	(1.8)	(2.2)
Ending Balance	$ 55.8	$ 78.0	$ 102.7