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Earnings per Common Share (Tables) | 12 Months Ended
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Mar. 31, 2021
Earnings Per Share [Abstract] |
Schedule of basic and diluted earnings per common share | The computations for basic and diluted earnings or loss per common share are as follows:
| Years Ended March 31,
(In millions, except per share amounts) | 2021 |  | 2020 |  | 2019
Income (loss) from continuing operations | $ | (4,339) |  |  | $ | 1,126 |  |  | $ | 254 |
Net income attributable to noncontrolling interests | (199) |  |  | (220) |  |  | (221) |
Income (loss) from continuing operations attributable to McKesson | (4,538) |  |  | 906 |  |  | 33 |
Income (loss) from discontinued operations, net of tax | (1) |  |  | (6) |  |  | 1 |
Net income (loss) attributable to McKesson | $ | (4,539) |  |  | $ | 900 |  |  | $ | 34 |
Weighted-average common shares outstanding: |  |  |  |  |
Basic | 160.6 |  |  | 180.6 |  |  | 196.3 |
Effect of dilutive securities: |  |  |  |  |
Restricted stock units | — |  |  | 1.0 |  |  | 1.0 |
Diluted | 160.6 |  |  | 181.6 |  |  | 197.3 |
Earnings (loss) per common share attributable to McKesson: (1) |  |  |  |  |
Diluted |  |  |  |  |
Continuing operations | $ | (28.26) |  |  | $ | 4.99 |  |  | $ | 0.17 |
Discontinued operations | — |  |  | (0.04) |  |  | — |
Total | $ | (28.26) |  |  | $ | 4.95 |  |  | $ | 0.17 |
Basic |  |  |  |  |
Continuing operations | $ | (28.26) |  |  | $ | 5.01 |  |  | $ | 0.17 |
Discontinued operations | — |  |  | (0.03) |  |  | — |
Total | $ | (28.26) |  |  | $ | 4.98 |  |  | $ | 0.17 |
(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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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