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v3.22.1

Significant Accounting Policies, Short-term Investments, Property, Plant and Equipment and Assets Held for Sale (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
--- | --- | --- | ---
Short-Term Investments [Abstract] |  |  |
Short-term investments | $ 3.7 | $ 3.7 |
Property, Plant and Equipment [Abstract] |  |  |
Accrued capital expenditures | $ 9.0 | 7.9 | $ 8.7
Liabilities Held for Sale [Member] |  |  |
Property, Plant and Equipment [Abstract] |  |  |
Accrued capital expenditures |  | $ 2.7 |

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