Fair Value - Summary of Assets And Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Thousands	Sep. 29, 2019	Dec. 31, 2018	Sep. 30, 2018
Assets:
Cash equivalents	$ 624,789	$ 998,601	$ 687,956
Marketable securities	49,821	54,250	59,843
Derivatives instruments	11,971	15,071	12,531
Assets, fair value	686,581	1,067,922	760,330
Liabilities:
Derivatives instruments	12,589	5,316	931
Level 1
Assets:
Cash equivalents	496,900	728,800	446,300
Marketable securities	49,821	44,243	49,832
Derivatives instruments	0	0	0
Assets, fair value	546,721	773,043	496,132
Liabilities:
Derivatives instruments	0	0	0
Level 2
Assets:
Cash equivalents	127,889	269,801	241,656
Marketable securities	0	10,007	10,011
Derivatives instruments	11,971	15,071	12,531
Assets, fair value	139,860	294,879	264,198
Liabilities:
Derivatives instruments	$ 12,589	$ 5,316	$ 931