Quarterly report pursuant to Section 13 or 15(d)

Segment Information (Summary of Net Revenues and Adjusted EBITDA by Segment) (Details)

v3.19.2
Segment Information (Summary of Net Revenues and Adjusted EBITDA by Segment) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Segment Reporting Information [Line Items]        
Document Fiscal Year Focus     2019  
Net Revenues $ 533 $ 435 $ 1,001 $ 737
Adjusted EBITDA 159 125 270 217
Reportable Segments        
Segment Reporting Information [Line Items]        
Net Revenues 532 435 998 737
Adjusted EBITDA 178 137 306 238
Reportable Segments | Hotel Franchising        
Segment Reporting Information [Line Items]        
Net Revenues 331 289 600 491
Adjusted EBITDA 162 129 275 214
Reportable Segments | Hotel Management        
Segment Reporting Information [Line Items]        
Net Revenues 201 146 398 246
Adjusted EBITDA 16 8 31 24
Corporate and Other        
Segment Reporting Information [Line Items]        
Net Revenues 1 0 3 0
Adjusted EBITDA $ (19) $ (12) $ (36) $ (21)