Stock-Based Compensation Plans (Summary Of Stock Option Activity) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	6 Months Ended
	Feb. 12, 2012 years
Stock-Based Compensation Plans [Abstract]
Outstanding and exercisable at August 28, 2011, Number Of Options	5,917
Exercised, Number Of Options	(963)
Outstanding and exercisable at February 12, 2012, Number Of Options	4,954
Outstanding and exercisable at August 28, 2011, Weighted-Average Exercise Price	$ 40.07
Exercised, Weighted-Average Exercise Price	$ 39.77
Outstanding and exercisable at February 12, 2012, Weighted-Average Exercise Price	$ 40.12
Outstanding and exercisable at February 12, 2012, Weighted-Average Remaining Contractual Term (in years)	2.40
Outstanding and exercisable at February 12, 2012, Aggregate Intrinsic Value	$ 218	[1]

[1] The difference between the exercise price and market value of common stock at February 12, 2012.