Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition (Performance Obligations) (Details)

v3.21.2
Revenue Recognition (Performance Obligations) (Details) - USD ($)
$ in Millions
Sep. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 394 $ 448 $ 484 $ 539
Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 170 176    
Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 88 115    
Deferred VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 57 74    
Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability [1] 64 59    
Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 13 16    
Deferred other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability 2 $ 8    
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 310      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 100      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | Deferred VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 88      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | Deferred VOI incentive 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]: 2021-10-01 | Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 60      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-10-01 | 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]: 2021-10-01 | Deferred other 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]: 2022-10-01        
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]: 2022-10-01 | Deferred subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 37      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-10-01 | Deferred VOI trial package 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]: 2022-10-01 | 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]: 2022-10-01 | 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]: 2022-10-01 | 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]: 2022-10-01 | 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]: 2023-10-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 21      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | 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]: 2023-10-01 | Deferred VOI trial package 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]: 2023-10-01 | 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]: 2023-10-01 | Deferred exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 1      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-10-01 | 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]: 2023-10-01 | 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]: 2024-10-01        
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]: 2024-10-01 | 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]: 2024-10-01 | Deferred VOI trial package 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]: 2024-10-01 | 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]: 2024-10-01 | 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]: 2024-10-01 | Deferred co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 4      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-10-01 | 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 initiated by the Company due to unexpected events. These amounts are included within Accrued expenses and other liabilities on the Condensed Consolidated Balance Sheets.