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
 3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Jun. 30, 2021
Dec. 31, 2020
Disaggregation of Revenue [Line Items]        
Contract liabilities     $ 240 $ 229
Deferred initial franchise fee revenues        
Disaggregation of Revenue [Line Items]        
Contract liabilities     143 136
Deferred loyalty program revenues        
Disaggregation of Revenue [Line Items]        
Contract liabilities     76 75
Contract liability, cumulative adjustment $ 16 $ 16    
Deferred other revenues        
Disaggregation of Revenue [Line Items]        
Contract liabilities     $ 21 $ 18