Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 367,660	$ 355,698	$ 355,679
Additions Charged to Income	402,644	407,419	344,924
Deductions From Reserves	394,495	395,457	344,905
Balance at End of Year	375,809	367,660	355,698
Self-Insurance Reserves, Current
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	145,241	137,100	139,554
Additions Charged to Income	398,336	403,598	342,451
Deductions From Reserves	394,495	395,457	344,905
Balance at End of Year	149,082	145,241	137,100
Self-Insurance Reserves, Noncurrent
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	222,419	218,598	216,125
Additions Charged to Income	4,308	3,821	2,473
Deductions From Reserves	0	0	0
Balance at End of Year	$ 226,727	$ 222,419	$ 218,598