Annual report pursuant to Section 13 and 15(d)

Deferred Compensation and Retirement Plans - Additional Information (Detail)

v3.22.2
Deferred Compensation and Retirement Plans - Additional Information (Detail)
 12 Months Ended
Apr. 30, 2022
USD ($)
Person
Jurisdiction
Apr. 30, 2021
USD ($)
Person
Apr. 30, 2020
USD ($)
Defined Benefit Plan Disclosure [Line Items]      
Recognized investment income(expense) $ (12,000,000.0) $ 38,500,000 $ (1,800,000)
Increase in market value of the underlying COLI investments 5,819,000 13,017,000 6,551,000
Net CSV 183,308,000 161,295,000  
CSV of COLI Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Outstanding policy loans 79,800,000 80,000,000.0  
Total death benefits payable, net of loans 449,300,000 443,900,000  
Increase in market value of the underlying COLI investments 5,800,000 13,000,000.0 6,600,000
Net CSV $ 183,300,000 161,300,000  
Maximum | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation range 60.00%    
Maximum | Debt Securities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation range 60.00%    
Minimum | Equity Securities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation range 40.00%    
Minimum | Debt Securities      
Defined Benefit Plan Disclosure [Line Items]      
Target allocation range 40.00%    
Long Term Performance Unit Plan      
Defined Benefit Plan Disclosure [Line Items]      
Number of payments after the seventh anniversary of the grant date 5 years    
Vesting percentage on each anniversary date 25.00%    
Long Term Performance Unit Plan | Maximum      
Defined Benefit Plan Disclosure [Line Items]      
Value per unit award $ 50,000    
Annual Benefit Payments per vested unit after anniversary period 25,000    
Long Term Performance Unit Plan | Minimum      
Defined Benefit Plan Disclosure [Line Items]      
Value per unit award 25,000    
Annual Benefit Payments per vested unit after anniversary period $ 12,500    
Enhanced Wealth Accumulation Plan      
Defined Benefit Plan Disclosure [Line Items]      
Participant contribution period towards deferred compensation plans (in years) 8 years    
Participant after tax contribution period towards deferred compensation plans (in years) 15 years    
Additional deferred units to acquire (in years) 5 years    
Medical and Life Insurance plan | Hay Group      
Defined Benefit Plan Disclosure [Line Items]      
Benefit plan, number of participants | Person 111    
Total benefit obligation $ 5,365,000 6,584,000 7,527,000
International Retirement Plans      
Defined Benefit Plan Disclosure [Line Items]      
Number of foreign jurisdictions | Jurisdiction 25    
Total benefit obligation $ 14,400,000 $ 15,600,000  
Long-term benefit obligation accrued, number of participants | Person 3,568 2,557  
Company's contributions $ 14,800,000 $ 12,700,000  
Executive Capital Accumulation Plan      
Defined Benefit Plan Disclosure [Line Items]      
Total benefit obligation 166,723,000 163,582,000 129,315,000
Company's contributions $ 7,500,000 8,200,000 9,000,000.0
Deferred compensation arrangement vesting period 5 years    
Gain (loss) on deferred compensation plan $ (10,600,000) 37,300,000 (800,000)
Company's contributions, unamortized portion 18,200,000 20,200,000  
Defined Contribution Plan      
Defined Benefit Plan Disclosure [Line Items]      
Company's matching contributions next fiscal year 3,200,000    
Company's matching contributions $ 2,100,000 3,000,000.0 0
Percentage contribution by the participants to defined contribution plan 50.00%    
Deferred Compensation Plan      
Defined Benefit Plan Disclosure [Line Items]      
Total benefit obligation $ 211,598,000 205,740,000 $ 180,821,000
Deferred Compensation Plan | CSV of COLI Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Gross CSV 263,200,000 241,300,000  
Outstanding policy loans 79,800,000 $ 80,000,000.0  
Company Owned Life Insurance Held In Trust | CSV of COLI Contracts      
Defined Benefit Plan Disclosure [Line Items]      
Net CSV 162,800,000    
Total death benefits, net of loans held in trust $ 400,600,000