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Net Income Per Common Share (Tables)
 3 Months Ended
Apr. 30, 2018
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)
 
2018
 
2017
Numerator
 
 
 
 
Consolidated net income
 
$
2,276

 
$
3,152

Consolidated net income attributable to noncontrolling interest
 
(142
)
 
(113
)
Consolidated net income attributable to Walmart
 
$
2,134

 
$
3,039

 
 
 
 
 
Denominator
 
 
 
 
Weighted-average common shares outstanding, basic
 
2,950

 
3,035

Dilutive impact of stock options and other share-based awards
 
17

 
12

Weighted-average common shares outstanding, diluted
 
2,967

 
3,047


 
 
 
 
Net income per common share attributable to Walmart
 
 
 
 
Basic
 
$
0.72

 
$
1.00

Diluted
 
0.72

 
1.00