Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.10.0.1
Stock-Based Compensation (Narrative) (Details)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 4 Months Ended 9 Months Ended
Nov. 30, 2018
shares
Jun. 01, 2018
shares
May 31, 2018
$ / shares
May 17, 2018
shares
Jul. 31, 2019
shares
Sep. 30, 2018
USD ($)
$ / shares
shares
Sep. 30, 2018
$ / shares
shares
Sep. 30, 2018
USD ($)
$ / shares
shares
May 14, 2018
shares
Dec. 31, 2017
$ / 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 $ 11.72 $ 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 | $           $ 10   $ 30    
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   $ 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     $ 61.40 $ 61.40 $ 61.40    
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) | $ / shares           $ 61.58 $ 61.58 $ 61.58   $ 60.80
Vested (in shares)               200,000    
RSUs, Granted Prior to 2018 | Scenario, Forecast                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Vested (in shares) 300,000                  
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)           7,400,000 7,400,000 7,400,000    
Stock-based compensation expense | $           $ 2   $ 3    
Wyndham Worldwide Corporation Equity and Incentive Plan                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Stock-based compensation expense | $           $ 10   $ 33