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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, 2022 | Apr. 30, 2021 | Apr. 30, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected employer contributions to the defined benefit pension plans in the year ended April 30, 2023 | $ 15,600 |  |
Expected future benefit payments [Abstract] |  |  |
2023 | 27,397 |  |
2024 | 27,973 |  |
2025 | 30,160 |  |
2026 | 28,544 |  |
2027 | 29,492 |  |
2028-2032 | 162,611 |  |
Total | 306,177 |  |
Defined Contribution Savings Plans [Abstract] |  |  |
Expense recorded | 30,300 | $ 24,300 | $ 19,000
US [Member] |  |  |
Expected future benefit payments [Abstract] |  |  |
2023 | 15,533 |  |
2024 | 15,666 |  |
2025 | 15,315 |  |
2026 | 15,125 |  |
2027 | 15,200 |  |
2028-2032 | 76,222 |  |
Total | 153,061 |  |
Retiree Health Benefits [Abstract] |  |  |
Annual (credits) expenses for benefit plans | (230) | 882 | (542)
Non-US [Member] |  |  |
Expected future benefit payments [Abstract] |  |  |
2023 | 11,864 |  |
2024 | 12,307 |  |
2025 | 14,845 |  |
2026 | 13,419 |  |
2027 | 14,292 |  |
2028-2032 | 86,389 |  |
Total | 153,116 |  |
Retiree Health Benefits [Abstract] |  |  |
Annual (credits) expenses for benefit plans | (10,900) | (12,100) | (7,256)
Non-US [Member] | Minimum [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Expected employer contributions to the defined benefit pension plans in the year ended April 30, 2023 | 12,000 |  |
Postretirement Life Insurance and Health Care Benefits [Member] |  |  |
Retiree Health Benefits [Abstract] |  |  |
Accumulated post-retirement benefit obligation | 1,300 | 1,500 |
Annual (credits) expenses for benefit plans | $ (100) | $ (100) | $ (100)

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