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Earnings Per Common Share
 12 Months Ended
Mar. 31, 2020
Earnings Per Share [Abstract]  
Earnings Per Common Share
Earnings per Common Share
Basic earnings per common share are computed by dividing net income by the weighted average number of common shares outstanding during the reporting period. Diluted earnings per common share are computed similar to basic earnings per common share except that the former reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock.
The computations for basic and diluted earnings per common share are as follows:
 
Years Ended March 31,
(In millions, except per share amounts)
2020
 
2019
 
2018
Income from continuing operations
$
1,126

 
$
254

 
$
292

Net income attributable to noncontrolling interests
(220
)
 
(221
)
 
(230
)
Income from continuing operations attributable to McKesson
906

 
33

 
62

Income (loss) from discontinued operations, net of tax
(6
)
 
1

 
5

Net income attributable to McKesson
$
900

 
$
34

 
$
67

 
 
 
 
 
 
Weighted average common shares outstanding:
 
 
 
 
 
Basic
181

 
196

 
208

Effect of dilutive securities:
 
 
 
 
 
Restricted stock units
1

 
1

 
1

Diluted
182

 
197

 
209

 
 
 
 
 
 
Earnings (loss) per common share attributable to McKesson: (1)
 
 
 
 
 
Diluted
 
 
 
 
 
Continuing operations
$
4.99

 
$
0.17

 
$
0.30

Discontinued operations
(0.04
)
 
—

 
0.02

Total
$
4.95

 
$
0.17

 
$
0.32

Basic
 
 
 
 
 
Continuing operations
$
5.01

 
$
0.17

 
$
0.30

Discontinued operations
(0.03
)
 
—

 
0.02

Total
$
4.98

 
$
0.17

 
$
0.32


(1)
Certain computations may reflect rounding adjustments.
Potentially dilutive securities include outstanding stock options, restricted stock units and performance-based and other restricted stock units. Approximately 2 million, 3 million and 2 million potentially dilutive securities for 2020, 2019 and 2018 were excluded from the computations of diluted net earnings per common share, as they were anti-dilutive.