v3.25.4
Intangible assets - Summary of Detailed Information About In Carrying Value Of Goodwill (Detail)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of Detailed Information About In Carrying Value Of Goodwill [Line Items]    
Perpetuity growth rate 2.00% 2.00%
Assessment & Qualifications [Member]    
Disclosure of Detailed Information About In Carrying Value Of Goodwill [Line Items]    
Discount rate 10.50% 11.00%
Perpetuity growth rate 2.00% 2.00%
Virtual Learning [Member]    
Disclosure of Detailed Information About In Carrying Value Of Goodwill [Line Items]    
Discount rate 10.30% 10.90%
Perpetuity growth rate 2.00% 2.00%
English Language Learning [Member]    
Disclosure of Detailed Information About In Carrying Value Of Goodwill [Line Items]    
Discount rate 12.60% 13.20%
Perpetuity growth rate 3.50% 3.50%
Enterprise Learning & Skills [member]    
Disclosure of Detailed Information About In Carrying Value Of Goodwill [Line Items]    
Discount rate 10.60% 10.80%
Perpetuity growth rate 2.00% 2.00%
Higher Education [Member]    
Disclosure of Detailed Information About In Carrying Value Of Goodwill [Line Items]    
Discount rate 10.50% 10.80%
Perpetuity growth rate 2.00% 2.00%