Quarterly report pursuant to Section 13 or 15(d)

Transactions With Former Parent (Narrative) (Details)

v3.19.2
Transactions With Former Parent (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Related Party Transaction [Line Items]          
Contract termination $ (9) $ 0 $ (9) $ 0  
Wyndham Worldwide | Information technology support, financial services, human resources and other shared services          
Related Party Transaction [Line Items]          
Expense for services provided by Parent       13  
Wyndham Worldwide | Indirect general corporate overhead allocations          
Related Party Transaction [Line Items]          
Expense for services provided by Parent       12  
Wyndham Worldwide | Insurance          
Related Party Transaction [Line Items]          
Expense for services provided by Parent       1  
Wyndham Worldwide | Defined contribution benefit plan          
Related Party Transaction [Line Items]          
Expense for services provided by Parent       $ 2  
Wyndham Worldwide | Separation and distribution agreement          
Related Party Transaction [Line Items]          
Revenue from former parent 1   3    
Wyndham Worldwide | Licensing Agreements          
Related Party Transaction [Line Items]          
Revenue from former parent 28   51    
Wyndham Worldwide | Wyndham Rewards          
Related Party Transaction [Line Items]          
Revenue from former parent 5   11    
Other non-current liabilities          
Related Party Transaction [Line Items]          
Separation and Distribution Agreement, Contingent Liability Assumed, Remaining Amount 8   8   $ 24
Other Current Liabilities          
Related Party Transaction [Line Items]          
Separation and Distribution Agreement, Contingent Liability Assumed, Remaining Amount $ 1   $ 1   $ 11