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REVENUE FROM CONTRACTS WITH CUSTOMERS - Schedule of Deferred Revenue, Cost of VOI Sales and Direct Selling Costs from Sales of VOIs Related to Project Under Construction (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disaggregation Of Revenue [Line Items]    
Sales of VOIs, net $ 252 $ 215
Sales of VOIs    
Disaggregation Of Revenue [Line Items]    
Sales of VOIs, net 92 39
Cost of VOI sales 28 10
Sales and marketing expense $ 13 $ 6