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Net Income Per Common Share (Tables) | 6 Months Ended
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Sep. 30, 2024
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,
|  |  |  |  |  |  | 2024 |  | 2023 |  | 2024 |  | 2023
Net income |  |  |  |  |  |  | $ | 78.4 |  |  | $ | 666.6 |  |  | $ | 207.7 |  |  | $ | 1,333.0 |
Basic weighted average common shares outstanding |  |  |  |  |  |  | 536.7 |  |  | 543.1 |  |  | 536.7 |  |  | 544.1 |
Dilutive effect of RSUs |  |  |  |  |  |  | 4.5 |  |  | 5.1 |  |  | 4.8 |  |  | 5.0 |
Dilutive effect of 2015 Senior Convertible Debt |  |  |  |  |  |  | 0.2 |  |  | 0.2 |  |  | 0.2 |  |  | 0.3 |
Dilutive effect of 2017 Senior Convertible Debt |  |  |  |  |  |  | 0.6 |  |  | 0.8 |  |  | 0.7 |  |  | 0.9 |
Diluted weighted average common shares outstanding |  |  |  |  |  |  | 542.0 |  |  | 549.2 |  |  | 542.4 |  |  | 550.3 |
Basic net income per common share |  |  |  |  |  |  | $ | 0.15 |  |  | $ | 1.23 |  |  | $ | 0.39 |  |  | $ | 2.45 |
Diluted net income per common share |  |  |  |  |  |  | $ | 0.14 |  |  | $ | 1.21 |  |  | $ | 0.38 |  |  | $ | 2.42 |
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,
|  |  |  |  |  |  | 2024 |  | 2023 |  | 2024 |  | 2023
2015 Senior Convertible Debt |  |  |  |  |  |  | $ | 28.50 |  |  | $ | 29.10 |  |  | $ | 28.58 |  |  | $ | 29.18 |
2017 Senior Convertible Debt |  |  |  |  |  |  | $ | 44.44 |  |  | $ | 45.38 |  |  | $ | 44.57 |  |  | $ | 45.50 |
2020 Senior Convertible Debt |  |  |  |  |  |  | $ | 90.93 |  |  | $ | 92.05 |  |  | $ | 91.08 |  |  | $ | 92.19 |
2024 Senior Convertible Debt |  |  |  |  |  |  | $ | 121.84 |  |  | $ | — |  |  | $ | 121.84 |  |  | $ | — |
2017 Junior Convertible Debt(1) |  |  |  |  |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 44.81 |
(1) The weighted average conversion price per share for the 2017 Junior Convertible Debt was prior to the settlement of the outstanding principal amount in May 2023.

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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 -Topic 260 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482662/260-10-50-1 + Details
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