Derivative Instruments and Hedging Activities - Non-designated Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings		$ (5.9)
Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ (2.2)	8.3	$ 5.7	$ (6.7)
Foreign currency forward contracts | Other (income) expense, net | Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	(2.0)	10.1	6.6	(3.8)
Foreign currency forward contracts | Interest expense, net | Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ (0.2)	$ (1.8)	$ (0.9)	$ (2.9)