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Earnings Per Common Share
 6 Months Ended
Sep. 30, 2016
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 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 September 30,
 
Six Months Ended September 30,
(In millions, except per share amounts)
2016
 
2015
 
2016
 
2015
Income from continuing operations
$
325

 
$
636

 
$
998

 
$
1,235

Net income attributable to noncontrolling interests
(17
)
 
(13
)
 
(35
)
 
(26
)
Income from continuing operations attributable to McKesson
308

 
623

 
963

 
1,209

Loss from discontinued operations, net of tax
(1
)
 
(6
)
 
(114
)
 
(16
)
Net income attributable to McKesson
$
307

 
$
617

 
$
849

 
$
1,193

 
 
 
 
 
 
 
 
Weighted average common shares outstanding:
 
 
 
 
 
 
 
Basic
226

 
232

 
226

 
232

Effect of dilutive securities:
 
 
 
 
 
 
 
Options to purchase common stock
1

 
2

 
1

 
1

Restricted stock units
1

 
1

 
1

 
2

Diluted
228

 
235

 
228

 
235

 
 
 
 
 
 
 
 
Earnings (loss) per common share attributable to McKesson: (1)
 
 
 
 
 
 
 
Diluted
 
 
 
 
 
 
 
Continuing operations
$
1.35

 
$
2.65

 
$
4.22

 
$
5.15

Discontinued operations
(0.01
)
 
(0.02
)
 
(0.50
)
 
(0.07
)
Total
$
1.34

 
$
2.63

 
$
3.72

 
$
5.08

Basic
 
 
 
 
 
 
 
Continuing operations
$
1.36

 
$
2.68

 
$
4.27

 
$
5.21

Discontinued operations
—

 
(0.02
)
 
(0.51
)
 
(0.06
)
Total
$
1.36

 
$
2.66

 
$
3.76

 
$
5.15


(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 and 1 million potentially dilutive securities were excluded from the computations of diluted net earnings per common share for each of the quarters ended September 30, 2016 and 2015 and 2 million and 1 million potentially dilutive securities were excluded from the computations of diluted net earnings per common share for the six months ended September 30, 2016 and 2015, as they were anti-dilutive.