Revenue Recognition (Capitalized Contract Costs) (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2024 |
Dec. 31, 2023 |
|
| Capitalized Contract Cost [Line Items] | ||
| Contract with Customer, Liability, Revenue Recognition Term | 1 year | |
| Vacation Ownership | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized Contract Cost, Amortization Period | 3 years | |
| Travel and Membership | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | $ 17 | $ 16 |
| Other assets | Vacation Ownership | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | 47 | 46 |
| Other assets | Travel and Membership | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | 6 | 5 |
| Prepaid Expenses and Other Current Assets | Travel and Membership | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | $ 11 | $ 11 |