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Employee Benefits - Additional Information (Details) - Performance Compensation Retirement Plan
12 Months Ended
Apr. 30, 2022
Minimum  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Period to elect to receive benefit payments 5 years
Maximum  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
Period to elect to receive benefit payments 20 years