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Goodwill and other intangible assets - Additional Information (Details)
€ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2025
EUR (€)
Dec. 31, 2023
USD ($)
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets $ 1,155 $ 1,042   $ 1,099
Impairment Loss Recognised In Replaced Asset   5    
Brand        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets 590 439   439
Brand | Ruby        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Brand recognized at cost 136   € 129  
Contingent consideration recognised as of acquisition date 16   € 15  
Goodwill and other intangible assets 151      
Brand | Kimpton        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets 193      
Brand | Regent        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets 57      
Brand | Six Senses        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets 189      
Software        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets $ 208 247   297
Software | Minimum        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average amortisation period 3 years      
Software | Minimum | Guest Reservation System        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average amortisation period 7 years      
Software | Maximum        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average amortisation period 5 years      
Software | Maximum | Guest Reservation System        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average amortisation period 10 years      
Software | Intangible asset material to entity        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets $ 60      
Software | Intangible asset material to entity | Internally generated        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets $ 55      
Software | Intangible asset material to entity | Internally generated | Minimum        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average remaining period 2 years      
Software | Intangible asset material to entity | Internally generated | Maximum        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average remaining period 2 years      
Management agreements        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets $ 16 $ 18   $ 19
Weighted average remaining amortisation period 11 years 13 years