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Pensions and Other Postretirement Benefits (Details Textual) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Oct. 31, 2025 | Oct. 31, 2024
Defined Benefit Plan Disclosure [Line Items] |  |
Defined Benefit Plan, Plan Assets, Benefits Paid | $ 1.7 | $ 1.7

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