Schedule of Earnings Per Share Effect on Net Income and Weighted Average Number of Dilutive Potential Common Stock (Detail) (USD $) In Millions, except Share data in Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Feb. 17, 2013	Feb. 12, 2012	Feb. 17, 2013	Feb. 12, 2012
Earnings Per Share [Line Items]
Net income available to common stockholders used in basic and diluted net income per common share	$ 547	$ 394	$ 963	$ 714
Weighted average number of common shares used in basic net income per common share	435,975	434,535	434,698	434,374
RSUs and stock options	3,775	4,094	4,086	4,801
Conversion of convertible notes	62	839	438	861
Weighted average number of common shares and dilutive potential of common stock used in diluted net income per share	439,812	439,468	439,222	440,036
Anti-dilutive RSUs	0	6	0	4