Retirement Plans - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 02, 2012 Day	Aug. 28, 2011	Aug. 29, 2010
Retirement Plans [Line Items]
Minimum number of days of employment to qualify for 401(k) retirement plan	90
Amounts expensed under defined contribution and defined benefit plans	$ 382	$ 345	$ 313
US Employees Other Than California Union
Retirement Plans [Line Items]
Deferred pre-tax matching contribution rate of employee benefits	50% of the first one thousand dollars
California Union Employees
Retirement Plans [Line Items]
Deferred pre-tax matching contribution rate of employee benefits	50% of the first five hundred dollars