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Retirement Plans - Expected Employer Contributions and Benefit Payments and Other Retirement Plans (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2022
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected future employer contributions, next fiscal year | $ 15,000 |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2025 | 29,734 |  |
2026 | 28,767 |  |
2027 | 29,582 |  |
2028 | 29,832 |  |
2029 | 31,049 |  |
2030–2034 | 167,032 |  |
Total | 315,996 |  |
Defined Contribution Savings Plans [Abstract] |  |  |
Defined contribution plan, cost | 27,000 | $ 30,700 | $ 30,300
US |  |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2025 | 15,887 |  |
2026 | 15,648 |  |
2027 | 15,659 |  |
2028 | 15,700 |  |
2029 | 15,781 |  |
2030–2034 | 76,966 |  |
Total | 155,641 |  |
Retiree Health Benefits [Abstract] |  |  |
Pension expense | 3,574 | 3,459 | (230)
Non-US |  |  |
Defined Benefit Plan, Expected Future Benefit Payment [Abstract] |  |  |
2025 | 13,847 |  |
2026 | 13,119 |  |
2027 | 13,923 |  |
2028 | 14,132 |  |
2029 | 15,268 |  |
2030–2034 | 90,066 |  |
Total | 160,355 |  |
Retiree Health Benefits [Abstract] |  |  |
Pension expense | 2,874 | (6,866) | (10,900)
Non-US | Minimum |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected future employer contributions, next fiscal year | 11,800 |  |
Postretirement Life Insurance and Health Care Benefits |  |  |
Retiree Health Benefits [Abstract] |  |  |
Accumulated post-retirement benefit obligation | 600 | 700 |
Pension expense | $ (100) | $ (100) | $ (100)

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