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
Jun. 30, 2021
Dec. 31, 2020
Jun. 30, 2020
Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 419 $ 448 $ 535 $ 539
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 333      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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]: 2023-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 22      
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        
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      
Subscription revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 178 176    
Subscription revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 106      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Subscription revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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      
Subscription revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 18      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Subscription revenue | 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 $ 17      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
VOI trial package revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 101 115    
VOI trial package revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 101      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
VOI trial package revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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      
VOI trial package revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
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      
VOI trial package revenue | 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 $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Exchange-related revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability [1] $ 63 59    
Exchange-related revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 59      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Exchange-related revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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      
Exchange-related revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
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      
Exchange-related revenue | 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 $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
VOI incentive revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 61 74    
VOI incentive revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Remaining performance obligations $ 61      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
VOI incentive revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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      
VOI incentive revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
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      
VOI incentive revenue | 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 $ 0      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Co-branded credit card programs revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 13 16    
Co-branded credit card programs revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
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      
Co-branded credit card programs revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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      
Co-branded credit card programs revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
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      
Co-branded credit card programs revenue | 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 $ 4      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period 1 year      
Other revenue        
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]        
Contract with Customer, Liability $ 3 $ 8    
Other revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-07-01        
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      
Other revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01        
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      
Other revenue | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01        
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      
Other revenue | 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 $ 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.