Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Mar. 27, 2016	Dec. 27, 2015	Mar. 29, 2015
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	$ (141)	$ (1,044)	$ 1,060
Not Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	0	1,088
Unrealized losses	0	0	(28)
Net unrealized gain (loss)	0	0	1,060
Not Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	321	416	0
Unrealized losses	(462)	(1,460)	0
Net unrealized gain (loss)	(141)	(1,044)	0
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain (loss)	65,929	107,438	125,977
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	53,774	78,910	74,219
Unrealized losses	(6,890)	(5,932)	(10,253)
Net unrealized gain (loss)	46,884	72,978	63,966
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	26,454	35,366	66,438
Unrealized losses	(3,618)	(710)	(914)
Net unrealized gain (loss)	22,836	34,656	65,524
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	1,900	0	3,149
Unrealized losses	(3,086)	0	(6,662)
Net unrealized gain (loss)	(1,186)	0	(3,513)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	1,349	241	0
Unrealized losses	(3,954)	(437)	0
Net unrealized gain (loss)	$ (2,605)	$ (196)	$ 0