Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Disaggregation of Net Revenues) (Details)

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Revenue Recognition (Disaggregation of Net Revenues) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Disaggregation of Revenue [Line Items]    
Net Revenues $ 305 $ 313
Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 116 121
Marketing, reservation and loyalty    
Disaggregation of Revenue [Line Items]    
Net Revenues 117 120
Cost reimbursements    
Disaggregation of Revenue [Line Items]    
Net Revenues 1 5
Other    
Disaggregation of Revenue [Line Items]    
Net Revenues 43 41
License and other fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 26 23
Reportable Segments | Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 116 121
Reportable Segments | Cost reimbursements    
Disaggregation of Revenue [Line Items]    
Net Revenues 1 5
Reportable Segments | Other    
Disaggregation of Revenue [Line Items]    
Net Revenues 43 41
Reportable Segments | Marketing and reservation fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 97 99
Reportable Segments | Deferred loyalty program revenues    
Disaggregation of Revenue [Line Items]    
Net Revenues 20 21
Reportable Segments | Management and other fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 2 3
Reportable Segments | License and other fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 26 23
Reportable Segments | Hotel Franchising    
Disaggregation of Revenue [Line Items]    
Net Revenues $ 305 $ 313