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v3.20.1

Retirement Plans, Components of Net Pension Expense (Income) and Weighted-Average Assumptions (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2020 | Apr. 30, 2019 | Apr. 30, 2018
Weighted-average assumptions [Abstract] |  |  |
Retirement plans settlemt charges for employees | $ 300 |  |
Retirement plans with accumulated benefit obligations in excess of plan assets [Abstract] |  |  |
Projected benefit obligation for plans with accumulated benefit obligations in excess of plan assets | 853,300 | $ 794,200 |
Accumulated benefit obligation for plans with accumulated benefit obligations in excess of plan assets | 816,500 | 762,800 |
Fair value of plan assets for plans with accumulated benefit obligations in excess of plan assets | 659,400 | 621,900 |
U.S. [Member] |  |  |
Defined benefit plans, net pension (income) expense [Abstract] |  |  |
Service Cost | 0 | 0 | $ 0
Interest Cost | 11,247 | 11,704 | 11,666
Expected Return on Plan Assets | (14,038) | (13,472) | (13,154)
Net Amortization of Prior Service Cost | (154) | (154) | (154)
Recognized Net Actuarial Loss | 2,403 | 2,035 | 2,289
Curtailment/Settlement Loss | 0 | 0 | 0
Net Pension Expense (Income) | $ (542) | $ 113 | $ 647
Weighted-average assumptions [Abstract] |  |  |
Discount Rate | 4.10% | 4.30% | 4.10%
Expected Return on Plan Assets | 6.80% | 6.80% | 6.80%
Retirement plans with accumulated benefit obligations in excess of plan assets [Abstract] |  |  |
Projected benefit obligation for plans with accumulated benefit obligations in excess of plan assets | $ 318,967 | $ 285,197 |
Non-U.S. [Member] |  |  |
Defined benefit plans, net pension (income) expense [Abstract] |  |  |
Service Cost | 1,851 | 912 | $ 960
Interest Cost | 12,652 | 12,943 | 13,876
Expected Return on Plan Assets | (26,116) | (25,551) | (26,385)
Net Amortization of Prior Service Cost | 73 | 57 | 57
Recognized Net Actuarial Loss | 3,993 | 3,746 | 3,832
Curtailment/Settlement Loss | 291 | 0 | 19
Net Pension Expense (Income) | $ (7,256) | $ (7,893) | $ (7,641)
Weighted-average assumptions [Abstract] |  |  |
Discount Rate | 2.40% | 2.60% | 2.60%
Rate of Compensation Increase | 3.00% | 3.00% | 3.00%
Expected Return on Plan Assets | 6.50% | 6.50% | 6.50%
Retirement plans with accumulated benefit obligations in excess of plan assets [Abstract] |  |  |
Projected benefit obligation for plans with accumulated benefit obligations in excess of plan assets | $ 497,489 | $ 477,561 |

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