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Net Income (Loss) Per Common Share (Tables)
 9 Months Ended
Oct. 31, 2019
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 October 31,
 
Nine Months Ended October 31,
(Amounts in millions, except per share data)
 
2019
 
2018
 
2019
 
2018
Numerator
 
 
 
 
 
 
 
 
Consolidated net income
 
$
3,321

 
$
1,817

 
$
10,907

 
$
3,366

Consolidated net income attributable to noncontrolling interest
 
(33
)
 
(107
)
 
(167
)
 
(383
)
Consolidated net income attributable to Walmart
 
$
3,288

 
$
1,710

 
$
10,740

 
$
2,983

 
 
 
 
 
 
 
 
 
Denominator
 
 
 
 
 
 
 
 
Weighted-average common shares outstanding, basic
 
2,843

 
2,924

 
2,855

 
2,940

Dilutive impact of share-based awards
 
18

 
17

 
17

 
16

Weighted-average common shares outstanding, diluted
 
2,861

 
2,941

 
2,872

 
2,956

 
 
 
 
 
 
 
 
 
Net income per common share attributable to Walmart
 
 
 
 
 
 
 
 
Basic
 
$
1.16

 
$
0.58

 
$
3.76

 
$
1.01

Diluted
 
1.15

 
0.58

 
3.74

 
1.01