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Net Income per Common and Common Equivalent Share (Tables) | 6 Months Ended
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Feb. 17, 2019
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 potentially dilutive common shares outstanding (shares in 000’s):
| 12 Weeks Ended |  | 24 Weeks Ended
| February 17, 2019 |  | February 18, 2018 |  | February 17, 2019 |  | February 18, 2018
Net income attributable to Costco | $ | 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 |
Anti-dilutive RSUs | 1,667 |  |  | — |  |  | — |  |  | — |

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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