Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Transactions With Former Parent (Net Parent Transfers) (Details)
$ in Millions
Mar. 31, 2018
USD ($)
Related Party Transaction [Line Items]  
Transfer from (to) Parent $ (14)
Wyndham Worldwide | Cash pooling and general financing activities  
Related Party Transaction [Line Items]  
Transfer from (to) Parent (44)
Wyndham Worldwide | Indirect general corporate overhead allocations  
Related Party Transaction [Line Items]  
Transfer from (to) Parent 9
Wyndham Worldwide | Corporate allocations for shared services  
Related Party Transaction [Line Items]  
Transfer from (to) Parent 7
Wyndham Worldwide | Stock-based compensation allocations  
Related Party Transaction [Line Items]  
Transfer from (to) Parent 3
Wyndham Worldwide | Income taxes  
Related Party Transaction [Line Items]  
Transfer from (to) Parent $ 11