Derivative Financial Instruments, Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type (Details) - Foreign Exchange Forward [Member] - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 30, 2018	Apr. 01, 2018
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain	$ 2,054	$ (1,551)	$ (736)
Not Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	2,391	0	0
Unrealized losses	(337)	0	0
Net unrealized gain	2,054	0	0
Not Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	1,269	383
Unrealized losses	0	(2,820)	(1,119)
Net unrealized gain	0	(1,551)	(736)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Net unrealized gain	30,197	26,017	(35,732)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Prepaid expenses and other current assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	22,737	21,718	458
Unrealized losses	(2,008)	(972)	(405)
Net unrealized gain	20,729	20,746	53
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other Assets [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	9,752	6,173	5,996
Unrealized losses	(239)	(843)	(3,089)
Net unrealized gain	9,513	5,330	2,907
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Accrued liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	77	8,218
Unrealized losses	(45)	(136)	(30,826)
Net unrealized gain	(45)	(59)	(22,608)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Other liabilities [Member]
Derivatives, Fair Value [Line Items]
Unrealized gains	0	0	2,846
Unrealized losses	0	0	(18,930)
Net unrealized gain	$ 0	$ 0	$ (16,084)