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, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Sales of VOIs, net	$ 229	$ 190
Sales of VOIs
Disaggregation Of Revenue [Line Items]
Sales of VOIs, net	18	3
Cost of VOI sales	4	1
Sales and marketing expense	$ 3	$ 1