Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Contract Liabilities) (Details)

v3.21.2
Revenue Recognition (Contract Liabilities) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]      
Contract liabilities   $ 243 $ 229
Deferred initial franchise fee revenues      
Disaggregation of Revenue [Line Items]      
Contract liabilities   146 136
Deferred loyalty program revenues      
Disaggregation of Revenue [Line Items]      
Contract liabilities   78 75
Contract liability, cumulative adjustment $ 16    
Deferred other revenues      
Disaggregation of Revenue [Line Items]      
Contract liabilities   $ 19 $ 18