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Net Income Per Common Share (Tables)
 9 Months Ended
Oct. 31, 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 October 31,
 
Nine Months Ended October 31,
(Amounts in millions, except per share data)
 
2015
 
2014
 
2015
 
2014
Numerator
 
 
 
 
 
 
 
 
Income from continuing operations
 
$
3,414

 
$
3,826

 
$
10,332

 
$
11,626

Income from continuing operations attributable to noncontrolling interest
 
(110
)
 
(115
)
 
(212
)
 
(410
)
Income from continuing operations attributable to Walmart
 
$
3,304

 
$
3,711

 
$
10,120

 
$
11,216

 
 
 
 
 
 
 
 
 
Denominator
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding, basic
 
3,210

 
3,229

 
3,221

 
3,231

Dilutive impact of stock options and other share-based awards
 
9

 
11

 
10

 
12

Weighted-average common shares outstanding, diluted
 
3,219

 
3,240

 
3,231

 
3,243


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

 
$
1.15

 
$
3.14

 
$
3.47

Diluted
 
1.03

 
1.15

 
3.13

 
3.46