Annual report pursuant to Section 13 and 15(d)

Transactions With Former Parent (Net Transfer to and Ne Contribution from Former Parent) (Details)

v3.20.4
Transactions With Former Parent (Net Transfer to and Ne Contribution from Former Parent) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Related Party Transaction [Line Items]      
Transfer from (to) Parent     $ (38)
Capital contribution from former Parent $ 0 $ 68 106
Dividend to former Parent     (109)
Wyndham Worldwide      
Related Party Transaction [Line Items]      
Transfer from (to) Parent     222
Contribution of outstanding borrowings due to former Parent     197
Capital contribution from former Parent     106
Dividend to former Parent     (109)
Other contributions from former parent, net     66
Due from Related Parties     260
Wyndham Worldwide | Cash pooling and general financing activities      
Related Party Transaction [Line Items]      
Transfer from (to) Parent     (110)
Wyndham Worldwide | Indirect general corporate overhead allocations      
Related Party Transaction [Line Items]      
Transfer from (to) Parent     12
Wyndham Worldwide | Corporate allocations for shared services      
Related Party Transaction [Line Items]      
Transfer from (to) Parent     13
Wyndham Worldwide | Stock-based compensation allocations      
Related Party Transaction [Line Items]      
Transfer from (to) Parent     20
Wyndham Worldwide | Income taxes      
Related Party Transaction [Line Items]      
Transfer from (to) Parent     $ 27