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Earnings Per Common Share
 9 Months Ended
Dec. 31, 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 December 31,
 
Nine Months Ended December 31,
(In millions, except per share amounts)
2016
 
2015
 
2016
 
2015
Income from continuing operations
$
649

 
$
642

 
$
1,647

 
$
1,877

Net income attributable to noncontrolling interests
(13
)
 
(13
)
 
(48
)
 
(39
)
Income from continuing operations attributable to McKesson
636

 
629

 
1,599

 
1,838

Income (loss) from discontinued operations, net of tax
(3
)
 
5

 
(117
)
 
(11
)
Net income attributable to McKesson
$
633

 
$
634

 
$
1,482

 
$
1,827

 
 
 
 
 
 
 
 
Weighted average common shares outstanding:
 
 
 
 
 
 
 
Basic
221

 
230

 
224

 
231

Effect of dilutive securities:
 
 
 
 
 
 
 
Options to purchase common stock
—

 
1

 
1

 
1

Restricted stock units
1

 
1

 
1

 
2

Diluted
222

 
232

 
226

 
234

 
 
 
 
 
 
 
 
Earnings (loss) per common share attributable to McKesson: (1)
 
 
 
 
 
 
 
Diluted
 
 
 
 
 
 
 
Continuing operations
$
2.86

 
$
2.71

 
$
7.07

 
$
7.86

Discontinued operations
(0.01
)
 
0.02

 
(0.51
)
 
(0.05
)
Total
$
2.85

 
$
2.73

 
$
6.56

 
$
7.81

Basic
 
 
 
 
 
 
 
Continuing operations
$
2.89

 
$
2.74

 
$
7.14

 
$
7.95

Discontinued operations
(0.02
)
 
0.02

 
(0.52
)
 
(0.04
)
Total
$
2.87

 
$
2.76

 
$
6.62

 
$
7.91


(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 December 31, 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 nine months ended December 31, 2016 and 2015, as they were anti-dilutive.