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Earnings Per Share (Tables) | 12 Months Ended
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Mar. 31, 2020
Earnings Per Share Reconciliation [Abstract] |
Computation Of Basic Earnings And Diluted Earnings Per Share |
| Year Ended March 31, |  |  |  |  |
(In millions, except per share amounts) | 2020 |  | 2019 |  | 2018 |
Net income | $ | 3,039 |  |  | $ | 1,019 |  |  | $ | 1,043 |  |
Shares used to compute earnings per share: |  |  |  |  |  |
Weighted-average common stock outstanding — basic | 293 |  |  | 303 |  |  | 308 |  |
Dilutive potential common shares related to stock award plans and from assumed exercise of stock options | 2 |  |  | 3 |  |  | 4 |  |
Weighted-average common stock outstanding — diluted | 295 |  |  | 306 |  |  | 312 |  |
Earnings per share: |  |  |  |  |  |
Basic | $ | 10.37 |  |  | $ | 3.36 |  |  | $ | 3.39 |  |
Diluted | $ | 10.30 |  |  | $ | 3.33 |  |  | $ | 3.34 |  |

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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://fasb.org/us-gaap/role/ref/legacyRef -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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