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