Provision for Income Tax Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Aug. 25, 2012	Aug. 27, 2011	Aug. 28, 2010
Current:
Federal	$ 449,670	$ 391,132	$ 397,062
State	47,386	39,473	34,155
Total	497,056	430,605	431,217
Deferred:
Federal	28,379	49,698	(3,831)
State	(2,822)	(5,031)	(5,192)
Total	25,557	44,667	(9,023)
Income tax expense	$ 522,613	$ 475,272	$ 422,194