Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Transactions With Former Parent (Net Parent Transfers) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Related Party Transaction [Line Items]      
Transfer from (to) Parent $ (38)   $ (38)
Proceeds from Contributions from Parent   $ 68 106
Dividend to former Parent   $ 0 (90)
Net contributions from former Parent 234    
Wyndham Worldwide      
Related Party Transaction [Line Items]      
Liabilities Assumed     197
Proceeds from Contributions from Parent     106
Dividend to former Parent     (90)
Other Contributions From Former Parent, Net     21
Net contributions from former Parent     234
Net Transfers to and Net Contributions From Former Parent     196
Wyndham Worldwide | Cash pooling and general financing activities      
Related Party Transaction [Line Items]      
Transfer from (to) Parent (110)   (110)
Wyndham Worldwide | Indirect general corporate overhead allocations      
Related Party Transaction [Line Items]      
Transfer from (to) Parent 12   12
Wyndham Worldwide | Corporate allocations for shared services      
Related Party Transaction [Line Items]      
Transfer from (to) Parent 13   13
Wyndham Worldwide | Stock-based compensation allocations      
Related Party Transaction [Line Items]      
Transfer from (to) Parent 20   20
Wyndham Worldwide | Income taxes      
Related Party Transaction [Line Items]      
Transfer from (to) Parent $ 27   $ 27