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Earnings (Loss) Per Common Share | 3 Months Ended
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Jun. 30, 2021
Earnings Per Share [Abstract] |
Earnings (Loss) Per Common Share | Earnings (Loss) Per Common Share Basic earnings (loss) per common share are computed by dividing net income by the weighted-average number of common shares outstanding during the reporting period. The computation of diluted earnings (loss) per common share is similar to that of basic earnings (loss) 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. Potentially dilutive securities include outstanding stock options, restricted stock units, and performance-based and other restricted stock units. Approximately 1 million and 3 million of potentially dilutive securities for the three months ended June 30, 2021 and 2020 were excluded from the computation of diluted net earnings per common share as they were anti-dilutive. The computations for basic and diluted earnings or loss per common share are as follows:
|  |  | Three Months Ended June 30,
(In millions, except per share amounts) |  |  |  |  | 2021 |  | 2020
Income from continuing operations |  |  |  |  | $ | 536 |  |  | $ | 495 |
Net income attributable to noncontrolling interests |  |  |  |  | (47) |  |  | (50) |
Income from continuing operations attributable to McKesson Corporation |  |  |  |  | 489 |  |  | 445 |
Loss from discontinued operations, net of tax |  |  |  |  | (3) |  |  | (1) |
Net income attributable to McKesson Corporation |  |  |  |  | $ | 486 |  |  | $ | 444 |
Weighted-average common shares outstanding: |  |  |  |  |  |  |
Basic |  |  |  |  | 156.2 |  |  | 162.0 |
Effect of dilutive securities: |  |  |  |  |  |  |
Stock options |  |  |  |  | 0.1 |  |  | — |
Restricted stock units (1) |  |  |  |  | 1.8 |  |  | 1.2 |
Diluted |  |  |  |  | 158.1 |  |  | 163.2 |
Earnings (loss) per common share attributable to McKesson: (2) |  |  |  |  |  |  |
Diluted |  |  |  |  |  |  |
Continuing operations |  |  |  |  | $ | 3.09 |  |  | $ | 2.72 |
Discontinued operations |  |  |  |  | (0.02) |  |  | — |
Total |  |  |  |  | $ | 3.07 |  |  | $ | 2.72 |
Basic |  |  |  |  |  |  |
Continuing operations |  |  |  |  | $ | 3.13 |  |  | $ | 2.74 |
Discontinued operations |  |  |  |  | (0.02) |  |  | — |
Total |  |  |  |  | $ | 3.11 |  |  | $ | 2.74 |
(1)Includes dilutive effect from restricted stock units, performance-based restricted stock units, and performance-based stock units. (2)Certain computations may reflect rounding adjustments.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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