v3.25.2
Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
 12 Months Ended
Apr. 30, 2025
Apr. 30, 2024
Apr. 30, 2023
Goodwill [Roll Forward]      
Balance, beginning of period $ 1,091,368,000 $ 1,204,050,000  
Impairment of goodwill 0 (108,449,000) $ (99,800,000)
Acquisition 1,026,000    
Foreign Translation Adjustment 29,111,000 (4,233,000)  
Balance, end of period 1,121,505,000 1,091,368,000 1,204,050,000
Total excluding Held for Sale or Sold segment      
Goodwill [Roll Forward]      
Balance, beginning of period 1,091,368,000 1,095,754,000  
Impairment of goodwill   0  
Acquisition 1,026,000    
Foreign Translation Adjustment 29,111,000 (4,386,000)  
Balance, end of period 1,121,505,000 1,091,368,000 1,095,754,000
Research      
Goodwill [Roll Forward]      
Balance, beginning of period 607,289,000 609,729,000  
Impairment of goodwill   0  
Acquisition 0    
Foreign Translation Adjustment 32,145,000 (2,440,000)  
Balance, end of period 639,434,000 607,289,000 609,729,000
Learning      
Goodwill [Roll Forward]      
Balance, beginning of period 484,079,000 486,025,000  
Impairment of goodwill   0  
Acquisition 1,026,000    
Foreign Translation Adjustment (3,034,000) (1,946,000)  
Balance, end of period 482,071,000 484,079,000 486,025,000
Held for Sale or Sold      
Goodwill [Roll Forward]      
Balance, beginning of period 0 108,296,000  
Impairment of goodwill   (108,449,000)  
Acquisition 0    
Foreign Translation Adjustment 0 153,000  
Balance, end of period $ 0 0 $ 108,296,000
Goodwill, accumulated impairment loss   $ 318,200,000