Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Jul. 02, 2017	Dec. 25, 2016	Jun. 26, 2016
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	$ (2,815)	$ 4,657	$ 1,033
Not Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	5,854	1,033
Unrealized losses	0	(1,197)	0
Net unrealized gain (loss)	0	4,657	1,033
Not Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	55	0	0
Unrealized losses	(2,870)	0	0
Net unrealized gain (loss)	(2,815)	0	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	5,943	71,928	49,096
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	12,220	34,265	49,195
Unrealized losses	(4,059)	(2,075)	(9,953)
Net unrealized gain (loss)	8,161	32,190	39,242
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	22,468	51,839	29,838
Unrealized losses	(5,257)	(792)	(6,836)
Net unrealized gain (loss)	17,211	51,047	23,002
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	6,403	8,481	1,660
Unrealized losses	(23,421)	(19,790)	(10,600)
Net unrealized gain (loss)	(17,018)	(11,309)	(8,940)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	2,079	0	223
Unrealized losses	(4,490)	0	(4,431)
Net unrealized gain (loss)	$ (2,411)	$ 0	$ (4,208)