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Net Income Per Common Share (Tables)
 3 Months Ended
Apr. 30, 2015
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 income per common share from continuing operations attributable to Walmart:
 
 
Three Months Ended April 30,
(Amounts in millions, except per share data)
 
2015
 
2014
Numerator
 
 
 
 
Income from continuing operations
 
$
3,283

 
$
3,711

Income from continuing operations attributable to noncontrolling interest
 
58

 
(129
)
Income from continuing operations attributable to Walmart
 
$
3,341

 
$
3,582

 
 
 
 
 
Denominator
 
 
 
 
Weighted-average common shares outstanding, basic
 
3,231

 
3,233

Dilutive impact of stock options and other share-based awards
 
12

 
15

Weighted-average common shares outstanding, diluted
 
3,243

 
3,248


 
 
 
 
Income per common share from continuing operations attributable to Walmart
 
 
 
 
Basic
 
$
1.03

 
$
1.10

Diluted
 
1.03

 
1.10