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Net Income Per Common Share (Tables) | 9 Months Ended
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Dec. 31, 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 December 31, |  | Nine Months Ended December 31,
|  |  |  |  |  |  | 2020 |  | 2019 |  | 2020 |  | 2019
Net income |  |  |  |  |  |  | $ | 36.2 |  |  | $ | 311.1 |  |  | $ | 233.4 |  |  | $ | 470.7 |
Basic weighted average common shares outstanding |  |  |  |  |  |  | 263.4 |  |  | 239.2 |  |  | 255.7 |  |  | 238.5 |
Dilutive effect of stock options and RSUs |  |  |  |  |  |  | 3.7 |  |  | 3.4 |  |  | 3.4 |  |  | 3.5 |
Dilutive effect of 2015 Senior Convertible Debt |  |  |  |  |  |  | 3.5 |  |  | 15.2 |  |  | 5.4 |  |  | 13.6 |
Dilutive effect of 2017 Senior Convertible Debt |  |  |  |  |  |  | 2.8 |  |  | 0.3 |  |  | 1.5 |  |  | 0.1 |
Dilutive effect of 2020 Senior Convertible Debt |  |  |  |  |  |  | — |  |  | — |  |  | — |  |  | — |
Dilutive effect of 2017 Junior Convertible Debt |  |  |  |  |  |  | 2.0 |  |  | 0.2 |  |  | 1.0 |  |  | 0.1 |
Diluted weighted average common shares outstanding |  |  |  |  |  |  | 275.4 |  |  | 258.3 |  |  | 267.0 |  |  | 255.8 |
Basic net income per common share |  |  |  |  |  |  | $ | 0.14 |  |  | $ | 1.30 |  |  | $ | 0.91 |  |  | $ | 1.97 |
Diluted net income per common share |  |  |  |  |  |  | $ | 0.13 |  |  | $ | 1.20 |  |  | $ | 0.87 |  |  | $ | 1.84 |
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 December 31, |  | Nine Months Ended December 31,
|  |  |  |  |  |  | 2020 |  | 2019 |  | 2020 |  | 2019
2015 Senior Convertible Debt |  |  |  |  |  |  | $ | 60.78 |  |  | $ | 61.67 |  |  | $ | 60.99 |  |  | $ | 61.92 |
2017 Senior Convertible Debt |  |  |  |  |  |  | $ | 94.78 |  |  | $ | 96.16 |  |  | $ | 95.11 |  |  | $ | 96.56 |
2020 Senior Convertible Debt |  |  |  |  |  |  | $ | 186.87 |  |  | $ | — |  |  | $ | 186.87 |  |  | $ | — |
2017 Junior Convertible Debt |  |  |  |  |  |  | $ | 93.12 |  |  | $ | 94.48 |  |  | $ | 93.44 |  |  | $ | 94.87 |

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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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