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Significant Accounting Policies - Government Incentives (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Mar. 31, 2023
--- | --- | ---
Government Assistance [Line Items] |  |
Government Assistance, Statement of Financial Position [Extensible Enumeration] | Property, Plant and Equipment, Net |
Government Assistance, Noncurrent, Statement of Financial Position [Extensible Enumeration] | Other Assets, Noncurrent |
Government Assistance, Current, Statement of Financial Position [Extensible Enumeration] | Accrued Liabilities, Current |
Capital-Related Grants |  |
Government Assistance [Line Items] |  |
Capital-related grants | $ 126.5 | $ 81.0
Capital-related grants - offset within other assets | 93.2 |
Capital-related grants - reduction to income tax payable | $ 27.3 |

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