Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - USD ($) $ in Thousands	Dec. 25, 2016	Dec. 27, 2015
Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	$ 34,265	$ 78,910
Unrealized losses	(2,075)	(5,932)
Net unrealized gain (loss)	32,190	72,978
Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	51,839	35,366
Unrealized losses	(792)	(710)
Net unrealized gain (loss)	51,047	34,656
Designated as Hedging Instrument [Member] | Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	241
Unrealized losses	0	(437)
Net unrealized gain (loss)	0	(196)
Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	8,481	0
Unrealized losses	(19,790)	0
Net unrealized gain (loss)	(11,309)	0
Not Designated as Hedging Instrument [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	416
Unrealized losses	0	(1,460)
Net unrealized gain (loss)	0	(1,044)
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	4,657	(1,044)
Foreign Exchange Forward [Member] | Designated as Hedging Instrument [Member] | Prepaid Expenses and Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	5,854	0
Unrealized losses	(1,197)	0
Net unrealized gain (loss)	$ 4,657	$ 0