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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Deferred Revenue, Deferred Cost of VOI Sales and Deferred Direct Selling Costs from Sales of VOIs Related to Projects under Construction (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2026 | Dec. 31, 2025
Disaggregation of Revenue [Line Items] |  |
Sales of VOIs, net | $ 825 | $ 637
Deferred Sales of VOIs |  |
Disaggregation of Revenue [Line Items] |  |
Sales of VOIs, net | 485 | 460
Cost of VOI sales | 135 | 133
Sales and marketing expense | $ 79 | $ 74

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