Quarterly report pursuant to Section 13 or 15(d)

Transactions With Former Parent (Narrative) (Details)

v3.21.1
Transactions With Former Parent (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Other non-current liabilities      
Related Party Transaction [Line Items]      
Separation and distribution agreement, contingent liability assumed, remaining amount $ 18   $ 18
Other Current Liabilities      
Related Party Transaction [Line Items]      
Separation and distribution agreement, contingent liability assumed, remaining amount 3   3
Other Current Assets      
Related Party Transaction [Line Items]      
Receivables due from former parent 2   $ 4
Affiliated Entity | Licensing Agreements      
Related Party Transaction [Line Items]      
Revenue from former parent 2 $ 1  
Affiliated Entity | Wyndham Rewards      
Related Party Transaction [Line Items]      
Revenue from former parent 2 3  
Wyndham Worldwide | Licensing Agreements      
Related Party Transaction [Line Items]      
Revenue from former parent $ 16 $ 17