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Net Income Per Common Share (Tables) | 12 Months Ended
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Jan. 31, 2018
Earnings Per Share [Abstract] |
Schedule of calculation of numerator and denominator in earnings per share | The following table provides a reconciliation of the numerators and denominators used to determine basic and diluted net income per common share attributable to Walmart:
|  | Fiscal Years Ended January 31,
(Amounts in millions, except per share data) |  | 2018 |  | 2017 |  | 2016
Numerator |  |  |  |  |  |
Consolidated net income |  | $ | 10,523 |  |  | $ | 14,293 |  |  | $ | 15,080 |
Consolidated net income attributable to noncontrolling interest |  | (661 | ) |  | (650 | ) |  | (386 | )
Consolidated net income attributable to Walmart |  | $ | 9,862 |  |  | $ | 13,643 |  |  | $ | 14,694 |
Denominator |  |  |  |  |  |
Weighted-average common shares outstanding, basic |  | 2,995 |  |  | 3,101 |  |  | 3,207 |
Dilutive impact of stock options and other share-based awards |  | 15 |  |  | 11 |  |  | 10 |
Weighted-average common shares outstanding, diluted |  | 3,010 |  |  | 3,112 |  |  | 3,217 |
Net income per common share attributable to Walmart |  |  |  |  |  |
Basic |  | $ | 3.29 |  |  | $ | 4.40 |  |  | $ | 4.58 |
Diluted |  | 3.28 |  |  | 4.38 |  |  | 4.57 |

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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/2003/role/presentationRef -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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