Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	$ 345,229	$ 335,470	$ 348,964
Addition charged to income	306,788	296,798	269,063
Deductions from reserve	300,291	287,039	282,557
Balance at End of Year	351,726	345,229	335,470
Self-Insurance Reserves, Current
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	125,569	114,133	119,375
Addition charged to income	306,788	296,798	269,063
Deductions from reserve	293,359	285,362	274,305
Balance at End of Year	138,998	125,569	114,133
Self-Insurance Reserves, Noncurrent
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Year	219,660	221,337	229,589
Deductions from reserve	6,932	1,677	8,252
Balance at End of Year	$ 212,728	$ 219,660	$ 221,337