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Accounting policies - Summary of Intangible Asset Useful Economic Life (Details)
 12 Months Ended
Dec. 31, 2024
Brands  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 20 years
Exclusive license rights  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 3 years
Bottom of range | Customer databases  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 2 years
Bottom of range | Marketing and data analytics know-how  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 4 years
Bottom of range | Licenses  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 1 year
Bottom of range | Acquired technology  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 2 years
Bottom of range | Internally-generated software development costs  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 2 years
Top of range | Customer databases  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 5 years
Top of range | Marketing and data analytics know-how  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 5 years
Top of range | Licenses  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 10 years
Top of range | Acquired technology  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 10 years
Top of range | Internally-generated software development costs  
Disclosure of detailed information about intangible assets [line items]  
Useful economic life 10 years