Financial Instruments - Gains (Losses), before Taxes, Recognized in AOCI (Details) - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016
Derivative Instruments, Gains (Losses)
Gains (losses) recognized in accumulated other comprehensive loss	$ (0.6)	$ 0.2	$ (3.9)	$ (1.5)
Foreign exchange contracts
Derivative Instruments, Gains (Losses)
Gains (losses) recognized in accumulated other comprehensive loss	(0.4)	(0.3)	(3.5)	(1.8)
Commodity contracts
Derivative Instruments, Gains (Losses)
Gains (losses) recognized in accumulated other comprehensive loss	$ (0.2)	$ 0.5	$ (0.4)	$ 0.3