v3.26.1
REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Contract Liability (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disaggregation of Revenue [Line Items]    
Total $ 2,572 $ 2,596
Deferred revenue related to the loyalty program    
Disaggregation of Revenue [Line Items]    
Total 1,798 1,604
Deferred revenue related to distribution and destination management services    
Disaggregation of Revenue [Line Items]    
Total 464 643
Deferred revenue related to insurance programs    
Disaggregation of Revenue [Line Items]    
Total 49 102
Advanced deposits    
Disaggregation of Revenue [Line Items]    
Total 72 59
Initial application fees from franchisees    
Disaggregation of Revenue [Line Items]    
Total 51 50
Other deferred revenue    
Disaggregation of Revenue [Line Items]    
Total $ 138 $ 138