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Asset Write Down (Details) - USD ($)
3 Months Ended 9 Months Ended
Feb. 28, 2026
Nov. 30, 2025
Aug. 31, 2025
Feb. 28, 2025
Feb. 28, 2026
Feb. 28, 2025
May 31, 2025
Debt (Details) [Line Items]              
Prepublication costs, net $ 42,300,000     $ 47,600,000 $ 42,300,000 $ 47,600,000 $ 49,700,000
Equity Securities without readily determinable fair value, impairment loss 0       0    
Asset impairments and write downs $ 0 $ 8,600,000   $ 300,000 $ 9,400,000 $ 400,000  
Total Entertainment              
Debt (Details) [Line Items]              
Investment in film and television programs and other production costs   4,900,000          
Total Education Solutions              
Debt (Details) [Line Items]              
Prepublication costs, net   3,400,000          
Total Children's Book Publishing and Distribution              
Debt (Details) [Line Items]              
Asset impairments and write downs     $ 800,000        
UK Children's Book Publishing              
Debt (Details) [Line Items]              
Equity Securities without readily determinable fair value, impairment loss   $ 300,000          
Other equity investments, percentage acquired   12.00%