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Acquisitions - Narrative (Details) - USD ($)
$ in Millions
2 Months Ended 3 Months Ended
Jun. 20, 2024
Aug. 31, 2024
Aug. 31, 2024
Aug. 31, 2023
May 31, 2024
Jun. 01, 2023
May 31, 2023
Business Acquisition [Line Items]              
Noncontrolling interest, equity, carrying amount           $ 1.6  
Additional paid-in capital   $ 606.3 $ 606.3 $ 632.7 $ 604.6 $ 0.5  
9 Story Media Group Inc.              
Business Acquisition [Line Items]              
Percentage of outstanding shares acquired 100.00%            
Percentage of interests acquired 25.00%            
Revenues   16.0 242.9 248.3      
Acquisition related costs     1.7        
Net income (loss)   $ 0.1 $ (64.3) $ (78.9)      
9 Story Media Group Inc. | Intellectual Property and Customer Contracts/Relationships              
Business Acquisition [Line Items]              
Acquired finite-lived intangible assets, weighted average useful life 10 years            
9 Story Media Group Inc. | Customer Relationships              
Business Acquisition [Line Items]              
Acquired finite-lived intangible assets, weighted average useful life 5 years            
9 Story Media Group Inc. | Trade Names              
Business Acquisition [Line Items]              
Acquired finite-lived intangible assets, weighted average useful life 10 years            
9 Story Media Group Inc. | Software Development              
Business Acquisition [Line Items]              
Acquired finite-lived intangible assets, weighted average useful life 3 years            
Scholastic, Inc. | Make Believe Ideas Limited (MBI)              
Business Acquisition [Line Items]              
Ownership percentage           100.00% 95.00%