Annual report pursuant to Section 13 and 15(d)

Transactions With Former Parent (Narrative) (Details)

v3.19.3.a.u2
Transactions With Former Parent (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2019
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Related Party Transaction [Line Items]              
Contract termination $ (1) $ 34 $ 9 $ 0 $ 42 $ 0 $ 0
Wyndham Hotels Defined Contribution Plans              
Related Party Transaction [Line Items]              
Defined contribution plan, cost         10 4  
Other non-current liabilities              
Related Party Transaction [Line Items]              
Remaining amount of contingent liability assumed 22       22 24  
Current liabilities              
Related Party Transaction [Line Items]              
Remaining amount of contingent liability assumed 2       2 11  
Other current assets              
Related Party Transaction [Line Items]              
Receivables due from former parent $ 4       4 44  
Wyndham Worldwide              
Related Party Transaction [Line Items]              
Other contributions from former parent, net           66  
Separation And Distribution Agreement | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Revenue from former parent         6 7  
Licensing Agreements | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Revenue from former parent         113 84 59
Wyndham Rewards | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Revenue from former parent         18 21 16
Contract Termination Indemnification Obligation | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Contract termination         8    
Other Assets | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Other contributions from former parent, net         28    
Sale of European Vacation Rentals Business | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Revenue from former parent         $ 40    
Percent of net proceeds         33.33333%    
Post closing-adjustment to reduce net consideration         $ 44    
Maximum loss potential         $ 15    
Information technology support, financial services, human resources and other shared services | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Expense for services provided by Parent           13 29
Indirect general corporate overhead allocations | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Expense for services provided by Parent           12 35
Insurance | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Expense for services provided by Parent           1 3
Defined contribution benefit plan | Wyndham Worldwide              
Related Party Transaction [Line Items]              
Expense for services provided by Parent           $ 2 $ 6