Tax Effect of Temporary Differences That Give Rise to Deferred Income Taxes (Detail) - USD ($) $ in Thousands	Dec. 28, 2019	Dec. 29, 2018
Deferred tax liabilities and (assets):
Lease assets	$ 770,182	$ 0
Property, plant and equipment	671,864	581,290
Deferred Tax Liabilities, Investments	176,744
Deferred Tax Assets, Investments		(10,811)
Inventories	30,398	25,989
Lease liabilities	(781,250)	(4,662)
Self-insurance reserves	(80,655)	(79,467)
Retirement plan contributions	(46,196)	(41,424)
Postretirement benefit cost	(32,064)	(28,224)
Purchase allowances	(15,299)	(11,114)
Other	(11,240)	(10,820)
Deferred Tax Liabilities, Net	$ 682,484	$ 420,757