Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Foreign exchange rate used to translate amounts denominated in functional currency to reporting currency.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6897108&loc=SL6897125-166521

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- Definition

Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 830
-SubTopic 30
-Section 45
-Paragraph 20
-Subparagraph (b,c)
-URI http://asc.fasb.org/extlink&oid=109240241&loc=d3e32211-110900

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Comprehensive Income - Foreign Currency Translation Gain (Loss) Components (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2018	Dec. 30, 2017	Jul. 01, 2017	Dec. 26, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ (10,582)	$ 58,916	$ (106,154)	$ 173,166
Euro
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ (144)	$ 30,373	$ (27,896)	$ 95,715
FX rate into USD	1.16	1.18	1.16	1.18	1.16	1.2	1.14	1.05
British Pound
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ (1,804)	$ 9,168	$ (11,886)	$ 24,712
FX rate into USD	1.31	1.34	1.31	1.34	1.31	1.35	1.3	1.23
Australian Dollar
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ (5,507)	$ 3,767	$ (21,227)	$ 16,220
FX rate into USD	0.72	0.78	0.72	0.78	0.74	0.78	0.77	0.72
Canadian Dollar
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ 1,488	$ 5,640	$ (4,366)	$ 9,820
FX rate into USD	0.77	0.8	0.77	0.8	0.76	0.8	0.77	0.74
Polish Zloty
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ 1,253	$ 940	$ (3,907)	$ 7,891
FX rate into USD	0.27	0.27	0.27	0.27	0.27	0.29	0.27	0.24
Swiss Franc
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ 266	$ 407	$ (1,741)	$ 5,305
FX rate into USD	1.02	1.03	1.02	1.03	1	1.03	1.04	0.98
Brazilian Real
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ (6,001)	$ 6,400	$ (32,701)	$ 4,136
FX rate into USD	0.25	0.32	0.25	0.32	0.26	0.3	0.3	0.31
All other currencies
Accumulated Other Comprehensive Income (Loss) [Line Items]
Foreign currency translation gain (loss)	$ (133)	$ 2,221	$ (2,430)	$ 9,367