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Stock-Based Compensation - Stock Option Activity (Details) - Share-based Payment Arrangement, Option - $ / shares
6 Months Ended
Oct. 31, 2022
Oct. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Grants in period, stock option awards (in shares) 10,000 260,000
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]    
Weighted average fair value of options on grant date (in dollars per share) $ 9.42 $ 11.71
Weighted Average Assumptions [Abstract]    
Expected life of options (in years) 5 years 10 months 24 days 6 years 3 months 18 days
Risk-free interest rate 0.50% 1.10%
Expected volatility 31.20% 30.70%
Expected dividend yield 3.00% 2.40%
Fair value of common stock on grant date (in dollars per share) $ 45.99 $ 56.79
Exercise price of stock option grant (in dollars per share) $ 45.99 $ 62.36
Maximum    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Exercisable period 10 years  
First Anniversary    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Options generally vesting, as a percent 10.00%  
Second Anniversary    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Options generally vesting, as a percent 20.00%  
Third Anniversary    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Options generally vesting, as a percent 30.00%  
Fourth Anniversary    
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]    
Options generally vesting, as a percent 40.00%