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Net Income Per Common Share
 9 Months Ended
Oct. 31, 2012
Earnings Per Share [Abstract]  
Net Income Per Common Share
Net Income Per Common Share
Basic income per common share from continuing operations attributable to Walmart is based on the weighted-average common shares outstanding during the relevant period. Diluted income per common share from continuing operations attributable to Walmart is based on the weighted-average common shares outstanding during the relevant period adjusted for the dilutive effect of outstanding stock options and other share-based awards. At October 31, 2012, all stock options and other share-based awards outstanding were dilutive and included in the calculation of diluted income per common share from continuing operations attributable to Walmart. At October 31, 2011, the Company had approximately 9 million stock options and other share-based awards outstanding that were antidilutive and not included in the calculation of diluted income per common share from continuing operations attributable to Walmart.
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
 
Nine Months Ended
 
 
October 31,
 
October 31,
(Amounts in millions, except per share data)
 
2012
 
2011
 
2012
 
2011
Numerator
 
 
 
 
 
 
 
 
Income from continuing operations
 
$
3,825

 
$
3,501

 
$
11,880

 
$
11,016

Less consolidated net income attributable to noncontrolling interest
 
(190
)
 
(157
)
 
(487
)
 
(444
)
Income from continuing operations attributable to Walmart
 
$
3,635

 
$
3,344

 
$
11,393

 
$
10,572

 
 
 
 
 
 
 
 
 
Denominator
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding, basic
 
3,364

 
3,445

 
3,385

 
3,473

Dilutive impact of stock options and other share-based awards
 
15

 
13

 
15

 
14

Weighted-average common shares outstanding, diluted
 
3,379

 
3,458

 
3,400

 
3,487

 
 
 
 
 
 
 
 
 
Income per common share from continuing operations attributable to Walmart
 
 
 
 
 
 
 
 
Basic
 
$
1.08

 
$
0.97

 
$
3.37

 
$
3.04

Diluted
 
1.08

 
0.97

 
3.35

 
3.03