Derivative Instruments and Hedging Activities - Non-designated Derivatives (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings			$ (5.9)	$ (7.0)
Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ (5.7)	$ (2.2)	(15.0)	(9.0)
Foreign currency forward contracts | Other expense, net | Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	(5.0)	(1.6)	(13.9)	(8.5)
Foreign currency forward contracts | Other expense, net | Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ (0.7)	$ (0.6)	$ (1.1)	$ (0.5)