Derivative Instruments and Hedging Activities - Non-designated Derivatives (Details) - Non-designated derivatives: - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ (2.9)	$ 12.0	$ (11.3)	$ 7.9
Foreign currency forward contracts | Other (income) expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	(4.3)	11.8	(13.1)	8.6
Foreign currency forward contracts | Interest expense, net
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ 1.4	$ 0.2	$ 1.8	$ (0.7)