Percentage of acceptable ranges within which asset allocations will fluctuate.

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Refers to the employee retirement age limit under retirement plans based on length of service and compensation, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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A period of notice within which redemption request can be executed.

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The period of time subsequent to termination of employment during which the company provides for the payment of supplemental retirement benefits for certain officers and senior management, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Amount of contribution expected to be received by defined benefit plan from employer in next fiscal year following current fiscal year.

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- Definition

Amount of net periodic benefit cost (credit) for defined benefit plan.

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Indicates line item in statement of income or comprehensive income that includes settlement and curtailment gain (loss) component of net periodic benefit (cost) credit for defined benefit plan.

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

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- Definition

Amount of gain (loss) recognized in net periodic benefit (cost) credit from settlement and curtailment.

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Amount of cost for defined contribution plan.

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Amount of liability for retirement benefits, classified as other.

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Retirement Plans - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Apr. 30, 2026	Apr. 30, 2025	Apr. 30, 2024
Defined Benefit Plan Disclosure [Line Items]
Cost due to settlement and curtailment		$ (0.2)
Defined Benefit Plan Net Periodic Benefit Cost Credit Settlement And Curtailment Gain Loss Statement Of Income Or Comprehensive Income Extensible List Not Disclosed Flag		Other Nonoperating Income (Expense)
Acceptable ranges within which asset allocations will fluctuate	5.00%
Notice period for redemption request	7 days
Expected future employer contributions, next fiscal year	$ 6.0
Defined contribution plan, cost	$ 21.5	$ 22.8	$ 27.0
Defined Benefit Plan, Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	15.00%
Fixed Income Securities and Cash
Defined Benefit Plan Disclosure [Line Items]
Target allocation percentage	85.00%
Supplemental Executive Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Term of supplemental retirement benefits	10 years
Postretirement Life Insurance and Health Care Benefits
Defined Benefit Plan Disclosure [Line Items]
Accumulated post-retirement benefit obligation	$ 0.3	0.6
Pension credits	$ (0.3)	$ (0.1)	$ (0.1)
Minimum
Defined Benefit Plan Disclosure [Line Items]
Employee retirement age limit under retirement plans	60 years
Minimum \| Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Expected future employer contributions, next fiscal year	$ 2.0
Maximum
Defined Benefit Plan Disclosure [Line Items]
Employee retirement age limit under retirement plans	65 years