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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 | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Disaggregation Of Revenue [Line Items] |  |
Sales of VOIs, net | $ 321 | $ 215
Deferred Sales of VOIs |  |
Disaggregation Of Revenue [Line Items] |  |
Sales of VOIs, net | 51 | 39
Cost of VOI sales | 15 | 10
Sales and marketing expense | $ 7 | $ 6

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