INVENTORY - Additional Information (Details) - USD ($) $ in Millions |
6 Months Ended | ||
|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
|
| Inventory [Line Items] | |||
| Real estate inventory, increase true up | $ 17 | $ 28 | |
| Amount of completed vacation ownership units classified as property and equipment | 229 | $ 224 | |
| Inventory deposits | 34 | 31 | |
| Balance Sheet Location [Axis]: us-gaap:OtherAssets | |||
| Inventory [Line Items] | |||
| Inventory deposits | 25 | 26 | |
| Balance Sheet Location [Axis]: vac:AccountsReceivableIncludingVariableInterestEntitiesAfterAllowanceforCreditLoss | |||
| Inventory [Line Items] | |||
| Inventory deposits | $ 9 | $ 5 | |