Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Disaggregation of Net Revenues) (Details)

v3.19.1
Revenue Recognition (Disaggregation of Net Revenues) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Disaggregation of Revenue [Line Items]    
Net Revenues $ 468 $ 302
Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 101 82
Marketing, reservation and loyalty    
Disaggregation of Revenue [Line Items]    
Net Revenues 113 84
License and other revenues from former Parent    
Disaggregation of Revenue [Line Items]    
Net Revenues 29 17
Cost reimbursements    
Disaggregation of Revenue [Line Items]    
Net Revenues 155 66
Other    
Disaggregation of Revenue [Line Items]    
Net Revenues 31 23
Reportable Segments    
Disaggregation of Revenue [Line Items]    
Net Revenues 466 302
Reportable Segments | Hotel Franchising    
Disaggregation of Revenue [Line Items]    
Net Revenues 269 203
Reportable Segments | Hotel Franchising | Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 99 79
Reportable Segments | Hotel Franchising | Marketing, reservation and loyalty    
Disaggregation of Revenue [Line Items]    
Net Revenues 112 84
Reportable Segments | Hotel Franchising | License and other revenues from former Parent    
Disaggregation of Revenue [Line Items]    
Net Revenues 29 17
Reportable Segments | Hotel Franchising | Other    
Disaggregation of Revenue [Line Items]    
Net Revenues 29 23
Reportable Segments | Hotel Management    
Disaggregation of Revenue [Line Items]    
Net Revenues 197 99
Reportable Segments | Hotel Management | Royalties and franchise fees    
Disaggregation of Revenue [Line Items]    
Net Revenues 2 3
Reportable Segments | Hotel Management | Marketing, reservation and loyalty    
Disaggregation of Revenue [Line Items]    
Net Revenues 1 0
Reportable Segments | Hotel Management | Hotel management - owned properties    
Disaggregation of Revenue [Line Items]    
Net Revenues 26 23
Reportable Segments | Hotel Management | Hotel management - managed properties    
Disaggregation of Revenue [Line Items]    
Net Revenues 13 7
Reportable Segments | Hotel Management | Cost reimbursements    
Disaggregation of Revenue [Line Items]    
Net Revenues 155 66
Corporate and Other    
Disaggregation of Revenue [Line Items]    
Net Revenues $ 2 $ 0