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Investments (Details) - USD ($)
12 Months Ended
Jun. 20, 2024
May 31, 2025
May 31, 2024
May 31, 2023
Investments (Details) [Line Items]        
Investments   $ 40,000,000.0 $ 37,500,000  
Income from equity method investments   500,000 500,000 $ 900,000
Proceeds from dividends received   0 1,300,000 0
International        
Investments (Details) [Line Items]        
Equity method investments   33,600,000 31,500,000  
Income from equity method investments   $ 300,000 500,000 $ 900,000
International | U.K. Book Publishing Business        
Investments (Details) [Line Items]        
Ownership percentage   26.20%    
Entertainment        
Investments (Details) [Line Items]        
Impairment of investments   $ 0    
Income from equity method investments   200,000    
Entertainment | 9 Story Media Group Inc.        
Investments (Details) [Line Items]        
Investment acquired, fair value $ 900,000      
Entertainment | Other Cost Method Investments        
Investments (Details) [Line Items]        
Investments     $ 6,000,000.0  
Entertainment | Financing and Production Company        
Investments (Details) [Line Items]        
Impairment of investments   0    
Entertainment | Animated Television Production Companies        
Investments (Details) [Line Items]        
Ownership percentage 50.00%      
Entertainment | UK Children's Book Publishing        
Investments (Details) [Line Items]        
Equity investment, percentage acquired 12.00%      
Entertainment | Equity and Cost Method Investments        
Investments (Details) [Line Items]        
Investments   $ 6,400,000    
Entertainment | Financing and Production Company | Financing and Production Company        
Investments (Details) [Line Items]        
Percent ownership in financing and production company   4.60%