Net Income Per Common And Common Equivalent Share (Schedule Of Earnings Per Share Effect On Net Income And Weighted Average Number Of Dilutive Potential Common Stock) (Details) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 12, 2012	Feb. 13, 2011	Feb. 12, 2012	Feb. 13, 2011
Net Income Per Common And Common Equivalent Share [Abstract]
Net income available to common stockholders used in basic and diluted net income per common share	$ 394	$ 348	$ 714	$ 660
Weighted average number of common shares used in basic net income per common share	434,535	436,682	434,374	435,385
Stock options and RSUs	4,094	5,565	4,801	5,958
Conversion of convertible notes	839	939	861	940
Weighted number of common shares and dilutive potential of common stock used in diluted net income per share	439,468	443,186	440,036	442,283
Anti-dilutive RSUs	6	0	4	0