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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Jan. 16, 2015
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Contingency factor applied to reduce cash flow projections   10.00%    
Goodwill and other intangible assets   $ 1,143 $ 967 $ 858
Software [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets   273    
Software assets not in use and therefore not being amortised [member] | Software [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Goodwill and other intangible assets   $ 109    
Management contracts [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Weighted average remaining amortisation period for management contracts   25 years 27 years  
Regent and UK Portfolio [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of net assets acquired - Goodwill   $ 83    
Regent and UK Portfolio [member] | Brands [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of intangible assets acquired   58    
Regent and UK Portfolio [member] | Management contracts [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of intangible assets acquired   6    
Kimpton Hotel & Restaurant Group LLC [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of net assets acquired - Goodwill $ 167      
Kimpton Hotel & Restaurant Group LLC [member] | Brands [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of intangible assets acquired 193      
Kimpton Hotel & Restaurant Group LLC [member] | Management contracts [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of intangible assets acquired $ 71 61 $ 64  
Regent [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of intangible assets acquired   57    
Regent [member] | Management contracts [member]        
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]        
Fair value of intangible assets acquired   $ 6 $ 0