Changes in Accumulated Other Comprehensive Income (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Oct. 03, 2021	Sep. 27, 2020	Oct. 03, 2021	Sep. 27, 2020
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		$ 2,493,256	$ 1,744,551	$ 2,207,018	$ 1,480,158
Other comprehensive (loss) income		(11,105)	16,748	(29,299)	27,102
Balance		2,537,493	1,993,544	2,537,493	1,993,544
Foreign Currency Translation Reclassification Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance				25,389	(23,514)
Other comprehensive (loss) income before reclassifications, net of tax				(26,672)	24,131
Amounts reclassified from accumulated other comprehensive income (loss), net of tax				0	0
Other comprehensive (loss) income				(26,672)	24,131
Balance		(1,283)	617	(1,283)	617
Unrealized Gains (Losses) on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance				6,954	3,480
Other comprehensive (loss) income before reclassifications, net of tax				(1,952)	5,165
Amounts reclassified from accumulated other comprehensive income (loss), net of tax				(670)	(2,188)
Other comprehensive (loss) income				(2,622)	2,977
Balance		4,332	6,457	4,332	6,457
Retirement Plans Prior Service Credit
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance				1,173	1,180
Other comprehensive (loss) income before reclassifications, net of tax				0	0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax	[1]	(2)	(2)	(5)	(6)
Other comprehensive (loss) income				(5)	(6)
Balance		1,168	1,174	1,168	1,174
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance		15,322	(8,500)	33,516	(18,854)
Other comprehensive (loss) income before reclassifications, net of tax				(28,624)	29,296
Amounts reclassified from accumulated other comprehensive income (loss), net of tax		(231)	(691)	(675)	(2,194)
Other comprehensive (loss) income		(11,105)	16,748	(29,299)	27,102
Balance		$ 4,217	$ 8,248	$ 4,217	$ 8,248

[1] The amortization of prior service credit is included in the computation of net periodic postretirement benefit cost. See Note Q: “Retirement Plans.