Consolidated Statements Of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 28, 2019	Sep. 30, 2020	Sep. 28, 2019
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net earnings	$ 356,676	$ 81,935	$ 638,583	$ 375,123
Foreign currency translation adjustment and other (net of taxes (benefit) of $351 and $688 for the three and nine months ended September 30, 2020; and $(409) and $(413) for the three and nine months ended September 28, 2019, respectively)	9,611	(11,679)	(1,738)	(9,458)
Unrealized gain (loss) on cash flow hedge (net of taxes (benefit) of $745 and $(5,937) for the three and nine months ended September 30, 2020; and $(1,327) and $(5,396) for the three and nine months ended September 28, 2019, respectively)	2,265	(4,037)	(18,050)	(16,407)
Unrealized holding gain (loss) on available-for-sale investments (net of taxes (benefit) of $(73) and $142 for the three and nine months ended September 30, 2020; and $5 and $286 for the three and nine months ended September 28, 2019, respectively)	(220)	14	433	867
Comprehensive income	368,332	66,233	619,228	350,125
Foreign currency translation adjustment and other, taxes (benefit)	351	(409)	688	(413)
Unrealized loss on cash flow hedge, (taxes) benefit	(745)	1,327	5,937	5,396
Change in net unrealized holding gain (loss) on available-for-sale investments, taxes (benefit)	$ (73)	$ 5	$ 142	$ 286