Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Jun. 26, 2016	Dec. 27, 2015	Jun. 28, 2015
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	$ 1,033	$ (1,044)	$ 536
Not Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	1,033	0	563
Unrealized losses	0	0	(27)
Net unrealized gain (loss)	1,033	0	536
Not Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	416	0
Unrealized losses	0	(1,460)	0
Net unrealized gain (loss)	0	(1,044)	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	49,096	107,438	102,622
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	49,195	78,910	63,740
Unrealized losses	(9,953)	(5,932)	(12,302)
Net unrealized gain (loss)	39,242	72,978	51,438
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	29,838	35,366	54,664
Unrealized losses	(6,836)	(710)	(732)
Net unrealized gain (loss)	23,002	34,656	53,932
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	1,660	0	4,349
Unrealized losses	(10,600)	0	(7,026)
Net unrealized gain (loss)	(8,940)	0	(2,677)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	223	241	0
Unrealized losses	(4,431)	(437)	(71)
Net unrealized gain (loss)	$ (4,208)	$ (196)	$ (71)