Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Dec. 01, 2018
Jun. 01, 2018
May 17, 2018
Jul. 31, 2019
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
May 31, 2018
May 14, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Equity award, vesting period     4 years                
Grant date fair value (in dollars per share)         $ 11.72 $ 11.72 $ 11.72        
Common stock conversion             1        
Stock-based compensation         $ 1 $ 20   $ 23      
Separation related costs                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock-based compensation           $ 20          
Stock-based compensation, portion recognized from modification of Stock Plan             $ 20        
Separation related costs, modification of stock plan                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Stock-based compensation, portion recognized from modification of Stock Plan             $ 15        
RSUs                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Granted (in shares)     500,000   500,000            
Grant date fair value (in dollars per share)         $ 61.40 $ 61.40 $ 61.40   $ 0.00    
Vested (in shares)         0            
RSUs | Scenario, Forecast                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vested (in shares)       100,000              
Options                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Granted (in shares)     500,000                
RSUs and PSUs                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vested (in shares)   100,000                  
RSUs, Granted Prior to 2018                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Granted (in shares)             100,000        
Grant date fair value (in dollars per share)         $ 61.61 $ 61.61 $ 61.61       $ 60.80
Vested (in shares)             100,000        
RSUs, Granted Prior to 2018 | Scenario, Forecast                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Vested (in shares) 400,000                    
Wyndham Hotels & Resorts, Inc. 2018 Equity and Incentive Plan                      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                      
Maximum number of shares approved (in shares)                   10,000,000  
Remaining shares available (in shares)         7,800,000 7,800,000 7,800,000