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Earnings Per Common Share
 9 Months Ended
Dec. 31, 2018
Earnings Per Share [Abstract]  
Earnings Per Common Share
Earnings Per Common Share
Basic earnings per common share is computed by dividing net income by the weighted average number of common shares outstanding during the reporting period. Diluted earnings per common share is computed similar to basic earnings per common share except that it 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:
  
Quarter Ended December 31,
 
Nine Months Ended December 31,
(In millions, except per share amounts)
2018
 
2017
 
2018
 
2017
Income from continuing operations
$
527

 
$
960

 
$
998

 
$
1,379

Net income attributable to noncontrolling interests
(57
)
 
(58
)
 
(169
)
 
(169
)
Income from continuing operations attributable to McKesson
470

 
902

 
829

 
1,210

(Loss) Income from discontinued operations, net of tax
(1
)
 
1

 
1

 
3

Net income attributable to McKesson
$
469

 
$
903

 
$
830

 
$
1,213

 
 
 
 
 
 
 
 
Weighted average common shares outstanding:
 
 
 
 
 
 
 
Basic
194

 
207

 
198

 
209

Effect of dilutive securities:
 
 
 
 
 
 
 
Restricted stock units
1

 
1

 
1

 
1

Diluted
195

 
208

 
199

 
210

 
 
 
 
 
 
 
 
Earnings per common share attributable to McKesson: (1)
 
 
 
 
 
 
 
Diluted
 
 
 
 
 
 
 
Continuing operations
$
2.41

 
$
4.32

 
$
4.17

 
$
5.75

Discontinued operations
(0.01
)
 
0.01

 
0.01

 
0.01

Total
$
2.40

 
$
4.33

 
$
4.18

 
$
5.76

Basic
 
 
 
 
 
 
 
Continuing operations
$
2.42

 
$
4.34

 
$
4.19

 
$
5.78

Discontinued operations
(0.01
)
 
0.01

 
—

 
0.02

Total
$
2.41

 
$
4.35

 
$
4.19

 
$
5.80


(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 $3 million and $2 million potentially dilutive securities for the third quarter and first nine months of 2019 and $2 million potentially dilutive securities for the third quarter and first nine months of 2018 were excluded from the computations of diluted net earnings per common share, as they were anti-dilutive.