Derivative Instruments - Effect on Income Statement (Details) - Foreign Exchange Contract [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Other Comprehensive Income (Loss) [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in AOCI (effective portion)	$ (3,253)	$ (6,757)	$ (16,977)	$ (11,016)
Sales Revenue, Net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from AOCI into income (effective portion)	0	1	(112)	47
Cost of Sales [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Reclassified from AOCI into income (effective portion)	(2,475)	(2,486)	(8,122)	(4,152)
Other Income Expense Net [Member] | Not Designated as Hedging Instrument [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net	(2,500)	(2,018)	(8,185)	(5,763)
Other Income Expense Net [Member] | Cash Flow Hedging [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Recognized in other, net (ineffective portion and amount excluded from effectiveness testing)	$ (19)	$ (49)	$ (127)	$ (58)