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Intangible Assets and Goodwill (Details 4) - Cash-generating units [member]
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Content & EdTech Platform    
Intangible Assets and Goodwill    
Growth rate - % 17.00% 13.70%
Discount rate - % 13.20% 12.10%
Growth rate (%) in perpetuity 5.20% 4.70%
Years projected 8 years 8 years
Digital Services Platform    
Intangible Assets and Goodwill    
Growth rate - % 5.40% 12.50%
Discount rate - % 13.20% 12.10%
Growth rate (%) in perpetuity 5.20% 4.70%
Years projected 8 years 8 years