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Net Income per Common and Common Equivalent Share - Schedule of Earnings per Share Effect on Net Income and Weighted Averegae Number of Dilutive Potential Common Stock (Details) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Sep. 01, 2024	Sep. 03, 2023	Aug. 28, 2022
Earnings Per Share [Abstract]
NET INCOME ATTRIBUTABLE TO COSTCO	$ 7,367	$ 6,292	$ 5,844
Weighted average number of common shares used in basic net income per common share	443,914	443,854	443,651
RSUs and other	845	598	1,106
Weighted average number of common shares and dilutive potential of common stock used in diluted net income per share	444,759	444,452	444,757

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