Revenue Recognition (Performance Obligations) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2021 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | | $ 436 | $ 400 | $ 395 | $ 382 |
Deferred subscription revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | | 163 | 164 | | |
Deferred VOI trial package revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | | 128 | 101 | | |
Deferred VOI incentive revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | | 78 | 70 | | |
Deferred exchange-related revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | [1] | 59 | 53 | | |
Deferred co-branded credit card programs revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | | 7 | 9 | | |
Deferred other revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Contract with Customer, Liability | | 1 | $ 3 | | |
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 | | $ 355 | | | |
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 | | $ 96 | | | |
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 | | $ 121 | | | |
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 | | $ 78 | | | |
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 | | $ 56 | | | |
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 | | $ 1 | | | |
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 | | $ 45 | | | |
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 | | $ 37 | | | |
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 | | $ 2 | | | |
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 | | $ 3 | | | |
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 | | $ 3 | | | |
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 | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-10-01 | | | | | |
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]: 2025-10-01 | 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]: 2025-10-01 | Deferred VOI trial package 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]: 2025-10-01 | 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]: 2025-10-01 | 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]: 2025-10-01 | Deferred co-branded credit card programs 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]: 2025-10-01 | 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]: 2026-10-01 | | | | | |
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 | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | Deferred subscription revenue | | | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] | | | | | |
Remaining performance obligations | | $ 14 | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period | | 1 year | | | |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-10-01 | 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]: 2026-10-01 | 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]: 2026-10-01 | 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]: 2026-10-01 | 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]: 2026-10-01 | 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. | |