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Stock-Based Compensation Plans - Summary of Stock Incentive Plan (Details) - Stock Incentive Plan - USD ($)
$ / shares in Units, $ in Thousands
 12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Number of Options      
Beginning balance (in shares) 735,886,000 613,400,000 501,400,000
Granted (in shares) 29,781,000 197,486,000 140,000,000
Exercised (in shares) 0 (35,000,000) (28,000,000)
Cancelled (in shares) (74,000,000) (40,000,000) 0
Ending balance (in shares) 691,667,000 735,886,000 613,400,000
Exercise Price per Share      
Beginning balance (in dollars per share) $ 75.51 $ 77.41 $ 78.25
Granted (in dollars per share) 57.19 72.30 69.19
Exercised (in dollars per share)   52.23 51.38
Cancelled (in dollars per share) 63.51 109.06  
Ending balance (in dollars per share) $ 76.01 $ 75.51 $ 77.41
Proceeds on Exercise      
Beginning balance $ 55,569 $ 47,480 $ 39,232
Granted 1,703 14,279 9,687
Exercised 0 (1,828) (1,439)
Cancelled (4,700) (4,362) 0
Ending balance $ 52,572 $ 55,569 $ 47,480
Minimum      
Exercise Price per Share      
Granted (in dollars per share) $ 42.25 $ 70.57 $ 61.02
Exercised (in dollars per share)   36.54 44.52
Cancelled (in dollars per share)   46.23  
Maximum      
Exercise Price per Share      
Granted (in dollars per share) $ 61.32 86.30 94.59
Exercised (in dollars per share)   54.85 $ 53.02
Cancelled (in dollars per share)   $ 150.83