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Net Income per Common and Common Equivalent Share (Tables)
 8 Months Ended
May 07, 2023
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 of potentially dilutive common shares outstanding (shares in 000s):
12 Weeks Ended36 Weeks Ended
May 7,
2023		May 8,
2022		May 7,
2023		May 8,
2022
Net income attributable to Costco
$1,302 $1,353 $4,132 $3,976 
Weighted average basic shares
443,814 443,700 443,843 443,567 
RSUs546 1,186 612 1,235 
Weighted average diluted shares
444,360 444,886 444,455 444,802