Quarterly report pursuant to Section 13 or 15(d)

Transactions With Former Parent (Narrative) (Details)

v3.20.2
Transactions With Former Parent (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Other non-current liabilities          
Related Party Transaction [Line Items]          
Separation and distribution agreement, contingent liability assumed, remaining amount $ 19   $ 19   $ 22
Other Current Liabilities          
Related Party Transaction [Line Items]          
Separation and distribution agreement, contingent liability assumed, remaining amount 4   4   2
Other Current Assets          
Related Party Transaction [Line Items]          
Receivables due from former parent 4   4   $ 4
Affiliated Entity | Separation and distribution agreement          
Related Party Transaction [Line Items]          
Revenue from former parent 0 $ 1 0 $ 4  
Affiliated Entity | Licensing Agreements          
Related Party Transaction [Line Items]          
Revenue from former parent 2 2 4 6  
Affiliated Entity | Wyndham Rewards          
Related Party Transaction [Line Items]          
Revenue from former parent 3 4 10 15  
Wyndham Worldwide | Licensing Agreements          
Related Party Transaction [Line Items]          
Revenue from former parent $ 16 $ 29 $ 49 $ 76