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Earnings Per Common Share (Tables) | 9 Months Ended
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Dec. 31, 2016
Earnings Per Share [Abstract] |
Schedule of computations for basic and diluted earnings per common share | 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.

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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