Quarterly report pursuant to Section 13 or 15(d)

Transactions With Former Parent (Net Parent Transfers) (Details)

v3.10.0.1
Transactions With Former Parent (Net Parent Transfers) (Details) - Wyndham Worldwide - USD ($)
$ in Millions
Jun. 30, 2018
Jun. 30, 2017
Related Party Transaction [Line Items]    
Transfer from (to) Parent $ (38) $ (61)
Cash pooling and general financing activities    
Related Party Transaction [Line Items]    
Transfer from (to) Parent (110) (137)
Indirect general corporate overhead allocations    
Related Party Transaction [Line Items]    
Transfer from (to) Parent 12 18
Corporate allocations for shared services    
Related Party Transaction [Line Items]    
Transfer from (to) Parent 13 14
Stock-based compensation allocations    
Related Party Transaction [Line Items]    
Transfer from (to) Parent 20 5
Income taxes    
Related Party Transaction [Line Items]    
Transfer from (to) Parent $ 27 $ 39