Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Disaggregation of Net Revenues) (Details)

v3.21.1
Revenue Recognition (Disaggregation of Net Revenues) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Disaggregation of Revenue [Line Items]    
Net Revenues $ 303 $ 410
Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 78 92
Marketing, reservation and loyalty    
Disaggregation of Revenue [Line Items]    
Net Revenues 85 106
Cost reimbursements    
Disaggregation of Revenue [Line Items]    
Net Revenues 71 126
Other    
Disaggregation of Revenue [Line Items]    
Net Revenues 30 33
Reportable Segments    
Disaggregation of Revenue [Line Items]    
Net Revenues 303 410
Reportable Segments | Hotel Franchising    
Disaggregation of Revenue [Line Items]    
Net Revenues 209 243
Reportable Segments | Hotel Franchising | Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 75 84
Reportable Segments | Hotel Franchising | Marketing, reservation and loyalty    
Disaggregation of Revenue [Line Items]    
Net Revenues 85 106
Reportable Segments | Hotel Franchising | License and other fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 20 21
Reportable Segments | Hotel Franchising | Other    
Disaggregation of Revenue [Line Items]    
Net Revenues 29 32
Reportable Segments | Hotel Management    
Disaggregation of Revenue [Line Items]    
Net Revenues 94 167
Reportable Segments | Hotel Management | Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 3 8
Reportable Segments | Hotel Management | Owned hotel revenues    
Disaggregation of Revenue [Line Items]    
Net Revenues 13 22
Reportable Segments | Hotel Management | Management fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 6 10
Reportable Segments | Hotel Management | Cost reimbursements    
Disaggregation of Revenue [Line Items]    
Net Revenues 71 126
Reportable Segments | Hotel Management | Other    
Disaggregation of Revenue [Line Items]    
Net Revenues $ 1 $ 1