Derivative Instruments (Effect of Derivative Instruments) (Details) (Cash Flow Hedging, USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 29, 2015		Mar. 30, 2014
Cash Flow Hedging
Effect of derivative instruments designated as cash flow hedges
Net loss recognized in AOCI (a)	$ (4.6)	[1]	$ (2.2)	[1]
Net loss reclassified from AOCI into cost of sales (a)	(1.4)	[1]	(0.9)	[1]
Net foreign exchange gain recognized in other income and expense (b)	$ 0.2	[2]	$ 0.1	[2]

[1] Effective portion, pre-tax

[2] Amount excluded from effectiveness testing