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Net Income Per Common Share (Tables) | 6 Months Ended
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Sep. 30, 2020
Earnings Per Share [Abstract] |
Schedule of Computation of Basic and Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted net income per common share (in millions, except per share amounts):
|  |  | Three Months Ended September 30, |  | Six Months Ended September 30,
|  |  |  |  |  |  | 2020 |  | 2019 |  | 2020 |  | 2019
Net income |  |  |  |  |  |  | $ | 73.6 |  |  | $ | 108.9 |  |  | $ | 197.2 |  |  | $ | 159.6 |
Basic weighted average common shares outstanding |  |  |  |  |  |  | 256.0 |  |  | 238.4 |  |  | 251.9 |  |  | 238.1 |
Dilutive effect of stock options and RSUs |  |  |  |  |  |  | 3.4 |  |  | 3.6 |  |  | 3.0 |  |  | 3.6 |
Dilutive effect of 2015 Senior Convertible Debt |  |  |  |  |  |  | 5.5 |  |  | 13.3 |  |  | 6.4 |  |  | 12.9 |
Dilutive effect of 2017 Senior Convertible Debt |  |  |  |  |  |  | 1.7 |  |  | — |  |  | 0.9 |  |  | — |
Dilutive effect of 2017 Junior Convertible Debt |  |  |  |  |  |  | 1.1 |  |  | — |  |  | 0.6 |  |  | — |
Diluted weighted average common shares outstanding |  |  |  |  |  |  | 267.7 |  |  | 255.3 |  |  | 262.8 |  |  | 254.6 |
Basic net income per common share |  |  |  |  |  |  | $ | 0.29 |  |  | $ | 0.46 |  |  | $ | 0.78 |  |  | $ | 0.67 |
Diluted net income per common share |  |  |  |  |  |  | $ | 0.27 |  |  | $ | 0.43 |  |  | $ | 0.75 |  |  | $ | 0.63 |
Schedule of Convertible Debt | The following is the weighted average conversion price per share used in calculating the dilutive effect (see Note 6 for details on the Convertible Debt):
|  |  | Three Months Ended September 30, |  | Six Months Ended September 30,
|  |  |  |  |  |  | 2020 |  | 2019 |  | 2020 |  | 2019
2015 Senior Convertible Debt |  |  |  |  |  |  | $ | 60.98 |  |  | $ | 61.92 |  |  | $ | 61.10 |  |  | $ | 62.05 |
2017 Senior Convertible Debt |  |  |  |  |  |  | $ | 95.09 |  |  | $ | 96.55 |  |  | $ | 95.27 |  |  | $ | 96.76 |
2017 Junior Convertible Debt |  |  |  |  |  |  | $ | 93.42 |  |  | $ | 94.86 |  |  | $ | 93.60 |  |  | $ | 95.06 |

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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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