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Share-Based Compensation, CVARs, Employee Stock Purchase Plan and Subsidiary Equity Incentive Plans (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022
Subsidiary Equity Incentive Plans [Member] |  |  |  |
Subsidiary Equity Incentive Plans [Abstract] |  |  |  |
Share-based compensation expense | $ 23.3 | $ 13.7 | $ 53.1 | $ 37.8
CVARs [Member] | March 2020 CVAR Grants [Member] |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Number of shares outstanding (in shares) | 27,531,825 |  | 27,531,825 |
Equity instruments vested and settled (in shares) |  |  | 4,499,113 |
Number of shares issued (in shares) |  |  | 1,445,420 |
CVARs [Member] | November 2021 CVAR Grants [Member] |  |  |  |
Share-Based Compensation [Abstract] |  |  |  |
Number of shares issued (in shares) |  |  | 955,782 |
CVARs [Member] | RSL 2021 EIP [Member] | November 2021 CVAR Grants [Member] |  |  |  |
Capped Value Appreciation Rights [Abstract] |  |  |  |
Non-vested balance, beginning (in shares) |  |  | 3,222,645 |
Vested (in shares) |  |  | (955,782) |
Forfeited (in shares) |  |  | (128,377) |
Non-vested balance, ending (in shares) | 2,138,486 |  | 2,138,486 |

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