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Net Income Per Common Share (Tables)
 3 Months Ended
Apr. 30, 2017
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:
 
 
Three Months Ended April 30,
(Amounts in millions, except per share data)
 
2017
 
2016
Numerator
 
 
 
 
Consolidated net income
 
$
3,152

 
$
3,216

Consolidated net income attributable to noncontrolling interest
 
(113
)
 
(137
)
Consolidated net income attributable to Walmart
 
$
3,039

 
$
3,079

 
 
 
 
 
Denominator
 
 
 
 
Weighted-average common shares outstanding, basic
 
3,035

 
3,144

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

 
10

Weighted-average common shares outstanding, diluted
 
3,047

 
3,154


 
 
 
 
Net income per common share attributable to Walmart
 
 
 
 
Basic
 
$
1.00

 
$
0.98

Diluted
 
1.00

 
0.98