Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 26, 2020	Dec. 28, 2019	Dec. 29, 2018
Current
Federal	$ 871,187	$ 504,047	$ 413,735
State	144,074	61,540	62,821
Current income tax expense	1,015,261	565,587	476,556
Deferred
Federal	56,382	171,422	59,377
State	(6,826)	43,582	3,868
Deferred income taxes	49,556	215,004	63,245
Federal	927,569	675,469	473,112
State	137,248	105,122	66,689
Income tax expense	$ 1,064,817	$ 780,591	$ 539,801