Retirement Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 28, 2011	Aug. 29, 2010	Aug. 30, 2009
Minimum number of days of employment to qualify for 401(k) Retirement Plan	90
Amounts expensed under defined contribution and defined benefit plans	$ 345	$ 313	$ 287
US Employees Other Than California Union [Member]
Deferred pre-tax matching contribution rate of employee benefits	50% of the first one thousand dollars
California Union Employees [Member]
Deferred pre-tax matching contribution rate of employee benefits	50% of the first five hundred dollars