Derivative Instruments and Hedging Activities - Non-Designated Derivatives (Details) - Non-designated derivatives - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income	$ (3.8)	$ (23.6)	$ 6.6
Foreign currency forward contracts | Other (Income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income	(10.0)	(25.4)	7.6
Foreign currency forward contracts | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized in Income	$ 6.2	$ 1.8	$ (1.0)