v3.26.3
Revenue Recognition (Contract Liabilities) (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Disaggregation of Revenue [Line Items]        
Contract liabilities $ 454 $ 469 $ 491 $ 459
Contract with Customer, Liability, Revenue Recognition Term 1 year      
Deferred subscription revenue        
Disaggregation of Revenue [Line Items]        
Contract liabilities $ 143 147    
Deferred VOI trial package revenue        
Disaggregation of Revenue [Line Items]        
Contract liabilities $ 133 138    
Deferred VOI trial package revenue | Vacation Ownership        
Disaggregation of Revenue [Line Items]        
Contract with Customer, Liability, Revenue Recognition Term 3 years      
Deferred VOI incentive revenue        
Disaggregation of Revenue [Line Items]        
Contract liabilities $ 88 90    
Deferred VOI incentive revenue | Vacation Ownership        
Disaggregation of Revenue [Line Items]        
Contract with Customer, Liability, Revenue Recognition Term 2 years      
Deferred exchange-related revenue        
Disaggregation of Revenue [Line Items]        
Contract liabilities [1] $ 55 57    
Deferred exchange-related revenue | Balance Sheet Location [Axis]: us-gaap:AccruedLiabilitiesAndOtherLiabilities        
Disaggregation of Revenue [Line Items]        
Contract liabilities [1] 1 1    
Deferred co-branded credit card programs revenue        
Disaggregation of Revenue [Line Items]        
Contract liabilities 32 36    
Deferred other revenue        
Disaggregation of Revenue [Line Items]        
Contract liabilities $ 3 $ 1    
[1] Includes contractual liabilities to accommodate members for cancellations initiated by the Company due to unexpected events. As of both September 30, 2026 and December 31, 2025, there were $1 million of these contractual liabilities included within Accrued expenses and other liabilities on the Condensed Consolidated Balance Sheets.