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Significant Accounting Policies, Short-term Investments, Property, Plant and Equipment and Assets Held for Sale (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022
--- | --- | --- | ---
Short-Term Investments [Abstract] |  |  |
Short-term investments | $ 0.0 | $ 3.5 |
Property, Plant and Equipment [Abstract] |  |  |
Accrued capital expenditures | 22.7 | 13.6 | $ 9.0
Assets Held for Sale [Abstract] |  |  |
Assets held for sale | $ 0.0 | $ 0.0 |

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