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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
9 Months Ended 12 Months Ended
Sep. 30, 2024
Dec. 31, 2023
Disaggregation Of Revenue [Line Items]    
Sales of VOIs, net $ 213 $ 215
Deferred Sales of VOIs    
Disaggregation Of Revenue [Line Items]    
Sales of VOIs, net 2 39
Cost of VOI sales 0 10
Sales and marketing expense $ 0 $ 6