Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 29, 2018	Dec. 30, 2017	Dec. 31, 2016
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 355,698	$ 355,679	$ 350,339
Additions Charged to Income	407,419	344,924	343,350
Deductions From Reserves	395,457	344,905	338,010
Balance at End of Year	367,660	355,698	355,679
Self-Insurance Reserves, Current
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	137,100	139,554	135,865
Additions Charged to Income	403,598	342,451	341,699
Deductions From Reserves	395,457	344,905	338,010
Balance at End of Year	145,241	137,100	139,554
Self-Insurance Reserves, Noncurrent
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	218,598	216,125	214,474
Additions Charged to Income	3,821	2,473	1,651
Deductions From Reserves	0	0	0
Balance at End of Year	$ 222,419	$ 218,598	$ 216,125