Derivative Instruments and Hedging Activities - Non-designated Derivatives (Details) - USD ($) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2017	Jul. 01, 2017	Oct. 01, 2016	Apr. 02, 2016	Sep. 30, 2017	Oct. 01, 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	$ 8.3		$ (1.2)		$ (6.7)	$ (10.2)
Foreign currency forward contracts | Other (income) expense, net | Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	10.1		(0.2)		(3.8)	(8.7)
Foreign currency forward contracts | Other (income) expense, net | Non-designated derivatives:
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain/(Loss) Recognized against Earnings	$ (1.8)		$ (1.0)		$ (2.9)	$ (1.5)