Financial Instruments - Schedule of Derivative Contracts on Consolidated Statement of Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded in revenue	$ 393,575	$ 392,522	$ 940,784	$ 1,044,763
Total amounts presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded in operating expenses	240,061	217,762	554,132	602,459
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]
Total amounts presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded in operating expenses	0	0	0	(1,405)
Gains (losses) on foreign exchange contracts designated as cash flow hedges reclassified from OCI into revenue	2,449	(6,617)	3,606	(6,897)
Cash flow hedges [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Total amounts presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded in revenue	393,575	392,522	940,784	1,044,763
Total amounts presented in the condensed consolidated statement of operations in which the effects of cash flow hedges are recorded in operating expenses	$ 171,328	$ 202,396	$ 586,907	$ 624,728