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Investments - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Jun. 20, 2024
Nov. 30, 2025
Nov. 30, 2024
Nov. 30, 2025
Nov. 30, 2024
Debt and Equity Securities, FV-NI [Line Items]          
Equity Securities without readily determinable fair value, impairment loss   $ 0.0   $ 0.0  
Income from equity-method investments   $ 0.4 $ (0.6) $ 0.3 $ 0.8
Impairment effect on earnings per share, basic (in dollars per share)   $ (0.26)      
Impairment effect on earnings per share, diluted (in dollars per share)   $ (0.25)      
Impairment Effect on Earnings Per Share, after Tax       $ 0.28  
9 Story Media Group Inc.          
Debt and Equity Securities, FV-NI [Line Items]          
Equity method and other investments $ 0.9        
Financing and Production Company | Financing and Production Company          
Debt and Equity Securities, FV-NI [Line Items]          
Other equity percentage       4.60%  
UK Children's Book Publishing          
Debt and Equity Securities, FV-NI [Line Items]          
Equity Securities without readily determinable fair value, impairment loss   $ 0.3   $ 0.3  
Other equity investments, percentage acquired 12.00%        
Animated Television Production Companies          
Debt and Equity Securities, FV-NI [Line Items]          
Equity method ownership percentage 50.00%        
UK Book Publishing Business          
Debt and Equity Securities, FV-NI [Line Items]          
Equity method ownership percentage   26.20%   26.20%