Financial Instruments - Schedule of Derivative Contracts on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Revenue	$ 299,344	$ 353,299	$ 547,209	$ 652,241
Cost of revenue	180,329	204,054	314,071	384,697
Accumulated net gain (loss) from cash flow hedges attributable to parent [Member] \| Reclassification out of accumulated other comprehensive income [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Revenue	1,157	(1,035)	1,157	(280)
Cost of revenue	0	(440)	0	(1,405)
Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Cost of revenue	$ 218,103	$ 212,654	$ 415,579	$ 422,332

The aggregate cost of goods produced and sold and services rendered during the reporting period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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+ References

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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