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Retirement Plans - Changes in and Status of Defined Benefit Plans' Assets and Benefit Obligations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Apr. 30, 2024 | Apr. 30, 2023 | Apr. 30, 2022
CHANGE IN PLAN ASSETS |  |  |
Fair value of plan assets, beginning of year | $ 488,662 |  |
Fair value, end of year | 466,737 | $ 488,662 |
US |  |  |
CHANGE IN PLAN ASSETS |  |  |
Fair value of plan assets, beginning of year | 186,607 | 204,455 |
Actual return on plan assets | (707) | (5,953) |
Employer contributions | 3,672 | 3,701 |
Employee contributions | 0 | 0 |
Settlements | 0 | 0 |
Benefits paid | (16,003) | (15,596) |
Foreign currency rate changes | 0 | 0 |
Fair value, end of year | 173,569 | 186,607 | $ 204,455
CHANGE IN PROJECTED BENEFIT OBLIGATION |  |  |
Benefit obligation, beginning of year | (235,888) | (249,570) |
Service cost | 0 | 0 | 0
Interest cost | (11,654) | (11,242) | (9,451)
Actuarial gains | 15,976 | 9,328 |
Benefits paid | 16,003 | 15,596 |
Foreign currency rate changes | 0 | 0 |
Settlements and other | 0 | 0 |
Benefit obligation, end of year | (215,563) | (235,888) | (249,570)
Underfunded status, end of year | (41,994) | (49,281) |
AMOUNTS RECOGNIZED ON THE STATEMENT OF FINANCIAL POSITION |  |  |
Noncurrent assets | 0 | 0 |
Current pension liability | (3,093) | (3,557) |
Noncurrent pension liability excluding held-for-sale | (38,901) | (45,724) |
Noncurrent pension liability held-for-sale | 0 | 0 |
Noncurrent pension liability | (38,901) | (45,724) |
Net amount recognized in statement of financial position | (41,994) | (49,281) |
AMOUNTS RECOGNIZED IN ACCUMULATED OTHER COMPREHENSIVE LOSS (BEFORE TAX) CONSIST OF |  |  |
Net actuarial losses | (77,025) | (84,367) |
Prior service cost gains (losses) | 1,638 | 1,792 |
Total accumulated other comprehensive loss | (75,387) | (82,575) |
Change in accumulated other comprehensive loss | 7,188 | (4,407) |
INFORMATION FOR PENSION PLANS WITH AN ACCUMULATED BENEFIT OBLIGATION IN EXCESS OF PLAN ASSETS |  |  |
Accumulated benefit obligation | 215,563 | 235,888 |
Fair value of plan assets | 173,569 | 186,607 |
INFORMATION FOR PENSION PLANS WITH A PROJECTED BENEFIT OBLIGATION IN EXCESS OF PLAN ASSETS |  |  |
Projected benefit obligation | 215,563 | 235,888 |
Fair value of plan assets | $ 173,569 | $ 186,607 |
WEIGHTED AVERAGE ASSUMPTIONS USED IN DETERMINING ASSETS AND LIABILITIES |  |  |
Discount rate | 5.10% | 5.10% |
Accumulated benefit obligations | $ (215,563) | $ (235,888) |
Non-US |  |  |
CHANGE IN PLAN ASSETS |  |  |
Fair value of plan assets, beginning of year | 302,055 | 442,259 |
Actual return on plan assets | (7,276) | (133,855) |
Employer contributions | 11,708 | 11,600 |
Employee contributions | 0 | 0 |
Settlements | 0 | (394) |
Benefits paid | (12,215) | (10,458) |
Foreign currency rate changes | (1,104) | (7,097) |
Fair value, end of year | 293,168 | 302,055 | 442,259
CHANGE IN PROJECTED BENEFIT OBLIGATION |  |  |
Benefit obligation, beginning of year | (343,008) | (474,802) |
Service cost | (532) | (796) | (1,196)
Interest cost | (16,069) | (13,389) | (11,148)
Actuarial gains | 21,258 | 127,635 |
Benefits paid | 12,215 | 10,458 |
Foreign currency rate changes | 2,009 | 5,416 |
Settlements and other | (235) | 2,470 |
Benefit obligation, end of year | (324,362) | (343,008) | $ (474,802)
Underfunded status, end of year | (31,194) | (40,953) |
AMOUNTS RECOGNIZED ON THE STATEMENT OF FINANCIAL POSITION |  |  |
Noncurrent assets | 2,967 | 830 |
Current pension liability | (1,193) | (1,203) |
Noncurrent pension liability excluding held-for-sale | (31,931) | (40,580) |
Noncurrent pension liability held-for-sale | (1,037) | 0 |
Noncurrent pension liability | (32,968) | (40,580) |
Net amount recognized in statement of financial position | (31,194) | (40,953) |
AMOUNTS RECOGNIZED IN ACCUMULATED OTHER COMPREHENSIVE LOSS (BEFORE TAX) CONSIST OF |  |  |
Net actuarial losses | (196,705) | (197,701) |
Prior service cost gains (losses) | (1,224) | (1,058) |
Total accumulated other comprehensive loss | (197,929) | (198,759) |
Change in accumulated other comprehensive loss | 830 | (26,320) |
INFORMATION FOR PENSION PLANS WITH AN ACCUMULATED BENEFIT OBLIGATION IN EXCESS OF PLAN ASSETS |  |  |
Accumulated benefit obligation | 34,274 | 35,068 |
Fair value of plan assets | 481 | 496 |
INFORMATION FOR PENSION PLANS WITH A PROJECTED BENEFIT OBLIGATION IN EXCESS OF PLAN ASSETS |  |  |
Projected benefit obligation | 34,643 | 335,109 |
Fair value of plan assets | $ 481 | $ 293,326 |
WEIGHTED AVERAGE ASSUMPTIONS USED IN DETERMINING ASSETS AND LIABILITIES |  |  |
Discount rate | 4.80% | 4.80% |
Rate of compensation increase | 3.00% | 3.00% |
Accumulated benefit obligations | $ (316,107) | $ (329,329) |

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- Definition Amount of plan asset for defined benefit pension plan with projected benefit obligation in excess of plan assets. + 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 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
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- Definition Amount of accumulated benefit obligation for defined benefit plan with accumulated benefit obligation in excess of plan assets. + 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 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
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- Definition Amount of plan asset for defined benefit plan with accumulated benefit obligation in excess of plan assets. + 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 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
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- Definition Amount of projected benefit obligation for defined benefit pension plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-3 + Details
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- Definition Amount of payment to participant under defined benefit plan which decreases plan assets. For pension plan, payment includes, but is not limited to, pension benefits and death benefits. For other postretirement plan, payment includes, but is not limited to, prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 60 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480266/715-60-50-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(5) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of contributions received by defined benefit plan from participant which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) plan assets of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit 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/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 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-6 + Details
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