Quarterly report pursuant to Section 13 or 15(d)

Transactions With Former Parent (Narrative) (Details)

v3.20.1
Transactions With Former Parent (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Other non-current liabilities      
Related Party Transaction [Line Items]      
Separation and distribution agreement, contingent liability assumed, remaining amount $ 21   $ 22
Other Current Liabilities      
Related Party Transaction [Line Items]      
Separation and distribution agreement, contingent liability assumed, remaining amount 2    
Other Current Assets      
Related Party Transaction [Line Items]      
Receivables due from former parent 4    
Affiliated Entity | Separation and distribution agreement      
Related Party Transaction [Line Items]      
Revenue from former parent   $ 2  
Affiliated Entity | Licensing Agreements      
Related Party Transaction [Line Items]      
Revenue from former parent 1 2  
Affiliated Entity | Wyndham Rewards      
Related Party Transaction [Line Items]      
Revenue from former parent 3 6  
Wyndham Worldwide | Licensing Agreements      
Related Party Transaction [Line Items]      
Revenue from former parent $ 17 $ 21