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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)