Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation (Narrative) (Details)
$ / shares in Units, $ in Millions
1 Months Ended 7 Months Ended 12 Months Ended
Jun. 01, 2018
$ / shares
May 31, 2018
$ / shares
May 17, 2018
shares
Jul. 31, 2019
shares
Dec. 31, 2018
$ / shares
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
May 14, 2018
shares
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) | $ / shares $ 11.72                
Common stock conversion 1 1       1      
Separation related costs                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation, portion recognized from modification of Stock Plan | $           $ 36      
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      
Non-employee directors                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense for non-employee directors | $           $ 1      
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) | $ / shares   $ 0.00     $ 61.31 $ 61.31      
Vested (in shares)         0 500,000      
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, 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) | $ / shares         $ 64.46 $ 64.46 $ 60.80    
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)         7,500,000 7,500,000      
Stock-based compensation expense | $           $ 5      
Wyndham Worldwide Corporation Equity and Incentive Plan                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Stock-based compensation expense | $           $ 39 $ 11 $ 10