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Acquisitions (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 01, 2022
Nov. 30, 2022
Nov. 30, 2022
Nov. 30, 2021
May 31, 2022
Business Acquisition [Line Items]          
Acquired receivable, fair value $ 0.1        
Amortizable intangible assets acquired   $ 4.1 $ 4.1 $ 0.0 $ 0.0
Goodwill acquired   $ 7.0 $ 7.0 $ 0.0 $ 0.0
Learning Ovations, Inc.          
Business Acquisition [Line Items]          
Percentage of interests acquired 100.00%        
Payments to acquire businesses, net of cash acquired $ 11.1        
Net assets acquired 4.2        
Amortizable intangible assets acquired 4.1        
Goodwill acquired $ 7.0        
Learning Ovations, Inc. | Valuation Technique, Discounted Cash Flow          
Business Acquisition [Line Items]          
Business combination, discount rate 0.175