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Significant Accounting Policies, Tooling and Research and Development (Details) - USD ($) $ in Millions | 12 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021 | Mar. 31, 2020
Tooling [Abstract] |  |  |  |
Property, plant and equipment - net | [1] | $ 315.4 | $ 269.9 |
Customer owned tooling receivable |  | 12.3 | 8.1 |
Research and Development [Abstract] |  |  |  |
Research and development cost |  | $ 50.3 | 46.3 | $ 59.5
Held for Sale [Member] |  |  |  |
Tooling [Abstract] |  |  |  |
Customer owned tooling receivable |  |  | 5.6 |
Tooling [Member] |  |  |  |
Tooling [Abstract] |  |  |  |
Property, plant and equipment, depreciable lives |  | 3 years |  |
Property, plant and equipment - net |  | $ 18.3 | $ 14.1 |
[1] | As of March 31, 2021, the Company had written-down the carrying value of held for sale property, plant and equipment within the liquid-cooled automotive business to zero. During fiscal 2022, the business no longer met the requirements to be classified as held for sale. As a result, the Company remeasured its long-lived assets to the lower of carrying value or fair value and recorded net impairment reversals totaling $56.0 million during fiscal 2022. The assets within the liquid-cooled automotive business are located in Hungary, Germany, China, the U.S., Italy, and the Netherlands. See Note 2 for additional information.

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