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Retirement Plans - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Apr. 30, 2025 | Apr. 30, 2024 | Apr. 30, 2023
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 | $ 4.8 |  |
Defined contribution plan, cost | $ 22.8 | $ 27.0 | $ 30.7
Equity securities: |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation percentage | 19.00% |  |
Fixed Income Securities and Cash |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Target allocation percentage | 81.00% |  |
Retirement Indemnity Plan for the Employees of Cross Knowledge |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Curtailment credit |  |  | (0.3)
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 | $ 0.6 | 0.6 |
Pension expense | $ (0.1) | $ (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 | $ 1.8 |  |
Maximum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Employee retirement age limit under retirement plans | 65 years |  |
Maximum | Russia Pension Plan | Russia |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Cost due to settlement and curtailment |  |  | $ (1.5)

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- Definition 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. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480482/715-20-55-17 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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