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Net Income Per Common Share (Tables)
 9 Months Ended
Oct. 31, 2012
Earnings Per Share [Abstract]  
Schedule Of Calculation Of Numerator And Denominator In Earnings Per Share
 
 
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