Quarterly report pursuant to Section 13 or 15(d)

Transactions With Former Parent (Narrative) (Details)

v3.21.2
Transactions With Former Parent (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Mar. 31, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Related Party Transaction [Line Items]            
Litigation reserves $ 5     $ 5   $ 4
Other non-current liabilities            
Related Party Transaction [Line Items]            
Separation and distribution agreement, contingent liability assumed, remaining amount 18     18   18
Other Current Liabilities            
Related Party Transaction [Line Items]            
Separation and distribution agreement, contingent liability assumed, remaining amount 4     4   3
Other Current Assets            
Related Party Transaction [Line Items]            
Receivables due from former parent 2     2   $ 4
Wyndham Worldwide | Licensing Agreements            
Related Party Transaction [Line Items]            
Revenue from former parent 16 $ 16   49 $ 49  
Affiliated Entity | Licensing Agreements            
Related Party Transaction [Line Items]            
Revenue from former parent 1 2   4 4  
Affiliated Entity | Wyndham Rewards            
Related Party Transaction [Line Items]            
Revenue from former parent $ 3 $ 3   $ 7 $ 10  
Affiliated Entity | Sale of European Vacation Rentals Business            
Related Party Transaction [Line Items]            
Related Party Transaction, Post Closing-Adjustment to Reduce Net Consideration     $ 44