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Income Taxes, Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Mar. 31, 2024
--- | --- | ---
Deferred Tax Assets [Abstract] |  |
Accounts receivable | $ 0.5 | $ 0.7
Inventories | 5.3 | 6.3
Plant and equipment | 10.1 | 12.0
Lease liabilities | 24.2 | 19.1
Pension and employee benefits | 26.7 | 27.7
Net operating and capital losses | 50.3 | 45.9
Credit carryforwards | 35.0 | 45.3
Research and experimental expenditures | 19.1 | 12.2
Other, principally accrued liabilities | 10.2 | 11.2
Total gross deferred tax assets | 181.4 | 180.4
Less: valuation allowances | (67.6) | (63.0)
Net deferred tax assets | 113.8 | 117.4
Deferred Tax Liabilities [Abstract] |  |
Plant and equipment | 9.1 | 7.2
Lease assets | 24.1 | 18.8
Goodwill | 4.9 | 4.8
Intangible assets | 31.3 | 40.9
Other | 1.5 | 0.6
Total gross deferred tax liabilities | 70.9 | 72.3
Net deferred tax assets | $ 42.9 | $ 45.1

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