Derivative Instruments - Effect on Income Statement (Details) (Foreign Exchange Contract [Member], USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 29, 2015	Mar. 30, 2014
Other Comprehensive Income (Loss) [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in AOCI (effective portion)	$ (8,288)	$ (2,202)
Sales Revenue, Net [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from AOCI into income (effective portion)	(112)	37
Cost of Sales [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from AOCI into income (effective portion)	(2,563)	(570)
Other Income Expense Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net	(7,158)	(3,109)
Other Income Expense Net [Member] | Cash Flow Hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net (ineffective portion and amount excluded from effectiveness testing)	$ (93)	$ 0