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Net Income per Common and Common Equivalent Share (Tables) | 8 Months Ended
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May 09, 2021
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 Ended |  | 36 Weeks Ended
| May 9, 2021 |  | May 10, 2020 |  | May 9, 2021 |  | May 10, 2020
Net income attributable to Costco | $ | 1,220 |  |  | $ | 838 |  |  | $ | 3,337 |  |  | $ | 2,613 |
Weighted average basic shares | 443,043 |  |  | 442,322 |  |  | 443,043 |  |  | 442,054 |
RSUs | 1,084 |  |  | 1,533 |  |  | 1,293 |  |  | 1,700 |
Weighted average diluted shares | 444,127 |  |  | 443,855 |  |  | 444,336 |  |  | 443,754 |
Anti-dilutive RSUs | 1,046 |  |  | — |  |  | — |  |  | — |

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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