Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Oct. 01, 2017	Dec. 25, 2016	Sep. 25, 2016
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain	$ 1,253	$ 4,657	$ 733
Not Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	2,606	5,854	812
Unrealized losses	(1,353)	(1,197)	(79)
Net unrealized gain	1,253	4,657	733
Not Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	0	0
Unrealized losses	0	0	0
Net unrealized gain	0	0	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain	(11,949)	71,928	18,992
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	10,207	34,265	34,179
Unrealized losses	(7,977)	(2,075)	(9,247)
Net unrealized gain	2,230	32,190	24,932
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	11,631	51,839	20,974
Unrealized losses	(3,139)	(792)	(7,524)
Net unrealized gain	8,492	51,047	13,450
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	5,354	8,481	4,352
Unrealized losses	(20,999)	(19,790)	(19,420)
Net unrealized gain	(15,645)	(11,309)	(15,068)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	8,325	0	992
Unrealized losses	(15,351)	0	(5,314)
Net unrealized gain	$ (7,026)	$ 0	$ (4,322)