XML 171 R75.htm IDEA: XBRL DOCUMENT v3.25.1
Accounting policies - Summary of Estimated Useful Life of Property, Plant and Equipment (Details)
 12 Months Ended
Dec. 31, 2024
Freehold buildings  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment, estimated useful life 50 years
Leasehold land and buildings  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment, estimated useful life shorter of the term of the lease and life of the asset
Bottom of Range | Fixtures, fittings and equipment  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment, estimated useful life 3 years
Bottom of Range | Computer equipment  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment, estimated useful life 3 years
Top of Range | Fixtures, fittings and equipment  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment, estimated useful life 10 years
Top of Range | Computer equipment  
Disclosure of detailed information about property, plant and equipment [line items]  
Property, plant and equipment, estimated useful life 5 years