Derivative Instruments (Effect of Derivative Instruments) (Details) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2017	Apr. 03, 2016
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) recognized in AOCI	$ 0.5	$ 4.0
Net foreign exchange gain (loss) recognized in other income and expense	(0.1)	(0.2)
Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI into cost of sales	(0.2)	(2.2)
Other Operating Income (Expense)
Derivative Instruments, Gain (Loss) [Line Items]
Net gain (loss) reclassified from AOCI into cost of sales	$ 0.8	$ 0.0