v3.24.2
Revenue Recognition (Performance Obligations) (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Jun. 30, 2023
Dec. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 454 $ 444 $ 424 $ 400
Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 159 161    
Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 140 136    
Deferred VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 84 81    
Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability [1] 60 59    
Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 5 6    
Deferred other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 6 $ 1    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 372      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 91      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 131      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Deferred VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 84      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 57      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 3      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-07-01 | Deferred other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 6      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 43      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 35      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 3      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | Deferred VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 3      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 2      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-07-01 | Deferred other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 19      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 16      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 3      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | Deferred VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-07-01 | Deferred other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 20      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 17      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 3      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | Deferred VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-07-01 | Deferred other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
[1] Includes contractual liabilities to accommodate members for cancellations due to unexpected events. These amounts are included within Accrued expenses and other liabilities on the Condensed Consolidated Balance Sheets.