Consolidated Statements of Comprehensive Earnings - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net earnings	$ 520,454	$ 220,434	$ 396,607
Other comprehensive earnings (loss):
Foreign currency translation adjustments	9,556	(55,524)	32,017
Unrealized holding gains (losses) on available-for-sale securities, net of tax	514	(2,000)	(390)
Net gains (losses) on cash flow hedging activities, net of tax	11,678
Net gains (losses) on cash flow hedging activities, net of tax		36,107	(90,302)
Changes in unrecognized pension and postretirement amounts, net of tax	14,850	(23,763)	1,555
Reclassifications to earnings, net of tax:
Net (gains) losses on cash flow hedging activities	(18,459)
Net (gains) losses on cash flow hedging activities		1,929	6,390
Amortization of unrecognized pension and postretirement amounts	6,160	9,665	5,875
Settlement of U.S. defined benefit plan	85,995	0	0
Total other comprehensive earnings (loss), net of tax	110,294	(33,586)	(44,855)
Total comprehensive earnings	$ 630,748	$ 186,848	$ 351,752