INVENTORY - Additional Information (Details) - USD ($) $ in Millions |
9 Months Ended | ||
|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Dec. 31, 2025 |
|
| Inventory [Line Items] | |||
| Real estate inventory, increase true up | $ 24 | $ 35 | |
| Amount of completed vacation ownership units classified as property and equipment | 227 | $ 224 | |
| Inventory deposits | 24 | 31 | |
| Balance Sheet Location [Axis]: us-gaap:OtherAssets | |||
| Inventory [Line Items] | |||
| Inventory deposits | 15 | 26 | |
| Balance Sheet Location [Axis]: vac:AccountsReceivableIncludingVariableInterestEntitiesAfterAllowanceforCreditLoss | |||
| Inventory [Line Items] | |||
| Inventory deposits | $ 9 | $ 5 | |