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Net Income per Common and Common Equivalent Share (Tables)
 6 Months Ended
Feb. 13, 2022
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table shows the amounts used in computing net income per share and the weighted average number of shares of basic and potentially dilutive common shares outstanding (shares in 000s):
12 Weeks Ended24 Weeks Ended
February 13,
2022		February 14,
2021		February 13,
2022		February 14,
2021
Net income attributable to Costco
$1,299 $951 $2,623 $2,117 
Weighted average basic shares
443,623 443,134 443,500 443,043 
RSUs1,293 1,360 1,260 1,397 
Weighted average diluted shares
444,916 444,494 444,760 444,440