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 ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Feb. 17, 2019	Feb. 18, 2018	Feb. 17, 2019	Feb. 18, 2018
Earnings Per Share [Abstract]
Net income available to common stockholders used in basic and diluted net income per common share	$ 889	$ 701	$ 1,656	$ 1,341
Weighted average number of common shares used in basic net income per common share	440,284	439,022	439,721	438,494
RSUs	2,053	2,546	2,814	2,707
Weighted average number of common shares and dilutive potential of common stock used in diluted net income per share	442,337	441,568	442,535	441,201
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1,667