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Net Income Per Common Share (Tables) | 9 Months Ended
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Dec. 31, 2019
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,
| 2019 |  | 2018 |  | 2019 |  | 2018
Net income | $ | 311.1 |  |  | $ | 49.2 |  |  | $ | 470.7 |  |  | $ | 181.2 |
Basic weighted average common shares outstanding | 239.2 |  |  | 236.7 |  |  | 238.5 |  |  | 235.9 |
Dilutive effect of stock options and RSUs | 3.4 |  |  | 3.3 |  |  | 3.5 |  |  | 3.8 |
Dilutive effect of 2015 Senior Convertible Debt | 15.2 |  |  | 4.6 |  |  | 13.6 |  |  | 9.8 |
Dilutive effect of 2017 Senior Convertible Debt | 0.3 |  |  | — |  |  | 0.1 |  |  | — |
Dilutive effect of 2017 Junior Convertible Debt | 0.2 |  |  | — |  |  | 0.1 |  |  | — |
Diluted weighted average common shares outstanding | 258.3 |  |  | 244.6 |  |  | 255.8 |  |  | 249.5 |
Basic net income per common share | $ | 1.30 |  |  | $ | 0.21 |  |  | $ | 1.97 |  |  | $ | 0.77 |
Diluted net income per common share | $ | 1.20 |  |  | $ | 0.20 |  |  | $ | 1.84 |  |  | $ | 0.73 |
Schedule of Convertible Debt | The following is the weighted average conversion price per share used in calculating the dilutive effect (See Note 12 for details on the convertible debt):
| Three Months Ended December 31, |  | Nine Months Ended December 31,
| 2019 |  | 2018 |  | 2019 |  | 2018
2015 Senior Convertible Debt | $ | 61.67 |  |  | $ | 62.72 |  |  | $ | 61.92 |  |  | $ | 63.00 |
2017 Senior Convertible Debt | $ | 96.16 |  |  | $ | 97.81 |  |  | $ | 96.56 |  |  | $ | 98.25 |
2017 Junior Convertible Debt | $ | 94.48 |  |  | $ | 96.10 |  |  | $ | 94.87 |  |  | $ | 96.53 |

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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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