v3.26.1
Acquisitions - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 20, 2024
Jun. 01, 2023
May 31, 2026
May 31, 2025
May 31, 2024
May 31, 2023
Business Combination [Line Items]            
Additional paid-in capital     $ 602.5 $ 607.1    
Revenues     1,581.9 1,625.5 $ 1,589.7  
Payments to acquire businesses, net of cash acquired     0.0 176.2 6.4  
Goodwill     199.4 198.9 132.8  
Payments to Acquire Additional Interest in Subsidiaries     0.0 0.0 $ 2.1  
Education            
Business Combination [Line Items]            
Goodwill     $ 75.7 $ 75.7    
9 Story Media Group Inc.            
Business Combination [Line Items]            
Percentage of outstanding shares acquired 100.00%          
Percentage of interests acquired 25.00%          
Accounts receivable $ 14.8          
Net assets acquired 129.5          
Goodwill 64.2          
Business Combination, Recognized Asset Acquired to Liability Assumed, Excess (Less), and Goodwill $ 193.7          
9 Story Media Group Inc. | Intellectual Property and Customer Contracts/Relationships            
Business Combination [Line Items]            
Acquired finite-lived intangible assets, weighted average useful life 10 years          
9 Story Media Group Inc. | Customer Relationships            
Business Combination [Line Items]            
Acquired finite-lived intangible assets, weighted average useful life 5 years          
Other Intangible assets: $ 51.5          
9 Story Media Group Inc. | Trade Names            
Business Combination [Line Items]            
Acquired finite-lived intangible assets, weighted average useful life 10 years          
Other Intangible assets: $ 16.5          
9 Story Media Group Inc. | Software Development            
Business Combination [Line Items]            
Acquired finite-lived intangible assets, weighted average useful life 3 years          
Other Intangible assets: $ 1.3          
Make Believe Ideas Limited (MBI)            
Business Combination [Line Items]            
Noncontrolling interest, equity, carrying amount   $ 1.6        
Adjustments to additional paid in capital   0.5        
Payments to Acquire Additional Interest in Subsidiaries   $ 2.1        
Scholastic, Inc. | Make Believe Ideas Limited (MBI)            
Business Combination [Line Items]            
Noncontrolling interest, ownership percentage by parent   100.00%       95.00%