Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Dec. 27, 2015	Dec. 28, 2014
Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	$ 78,910	$ 46,594
Unrealized losses	(5,932)	(11,508)
Net unrealized gain (loss)	72,978	35,086
Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	35,366	34,234
Unrealized losses	(710)	(172)
Net unrealized gain (loss)	34,656	34,062
Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	241	0
Unrealized losses	(437)	0
Net unrealized gain (loss)	(196)	0
Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	447
Unrealized losses	0	(725)
Net unrealized gain (loss)	0	(278)
Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	416	1,733
Unrealized losses	(1,460)	(4,046)
Net unrealized gain (loss)	$ (1,044)	$ (2,313)