Stock-Based Compensation Plans - Tax Benefits Realized and Intrinsic Value Related to Stock Options Exercised (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Feb. 16, 2014		Feb. 17, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Actual tax benefit realized for stock options exercised	$ 9		$ 23
Intrinsic value of stock options exercised	$ 24	[1]	$ 64	[1]

[1] The difference between the exercise price and the market value of common stock measured at each exercise date.