v3.25.2
Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
 3 Months Ended
Jul. 31, 2025
Apr. 30, 2025
Goodwill [Roll Forward]    
Balance, beginning of period $ 1,121,505,000  
Balance, end of period 1,117,827,000  
Research and Learning    
Goodwill [Roll Forward]    
Balance, beginning of period 1,121,505,000  
Foreign Translation Adjustment (3,678,000)  
Balance, end of period 1,117,827,000  
Research    
Goodwill [Roll Forward]    
Balance, beginning of period 639,434,000  
Foreign Translation Adjustment (5,441,000)  
Balance, end of period 633,993,000  
Learning    
Goodwill [Roll Forward]    
Balance, beginning of period 482,071,000  
Foreign Translation Adjustment 1,763,000  
Balance, end of period 483,834,000  
Held for Sale or Sold    
Goodwill [Roll Forward]    
Balance, beginning of period $ 0  
Cumulative pretax noncash goodwill impairment   $ 318,200,000