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Acquisitions and Divestitures - Narrative (Details)
 3 Months Ended
May 31, 2023
USD ($)
Nov. 01, 2022
USD ($)
Jul. 31, 2023
USD ($)
Segment
Jul. 31, 2022
USD ($)
Apr. 30, 2023
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Goodwill     $ 1,102,499,000   $ 1,204,050,000
Proceeds related to the sale of a business     $ 457,000 $ 0  
Number of reportable segments | Segment     3    
Learning          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Goodwill     $ 483,377,000   $ 486,025,000
Series of Individually Immaterial Business Acquisitions          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Fair value of consideration transferred   $ 6,100,000      
Total cash consideration transferred   5,200,000      
Cash to be paid after acquisition date   900,000      
Intangible assets   3,700,000      
Series of Individually Immaterial Business Acquisitions | Learning          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Goodwill   $ 3,900,000      
Held-for-Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Intangible assets, net     186,609,000    
Goodwill     81,940,000    
Disposal group, pre-tax impairment     73,900,000    
Tuition Manager | Disposed of by Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Proceeds related to the sale of a business $ 500,000        
Loss on disposal 2,000,000        
Total non-current assets held-for-sale 2,500,000        
Intangible assets, net 1,000,000        
Goodwill $ 0        
University Services | Held-for-Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Intangible assets, net     133,413,000    
Goodwill     0    
Disposal group, pre-tax impairment     40,600,000    
Cross Knowledge | Held-for-Sale          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Intangible assets, net     18,305,000    
Goodwill     0    
Disposal group, pre-tax impairment     $ 33,300,000