REVENUE FROM CONTRACTS WITH CUSTOMERS - Composition of our Contract Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Disaggregation Of Revenue [Line Items]
Bonus point incentive liability	$ 61	$ 51
Advanced deposits
Disaggregation Of Revenue [Line Items]
Contract with customer, liability	185	150
Deferred sales of VOIs of projects under construction
Disaggregation Of Revenue [Line Items]
Contract with customer, liability	18	3
Club activation fees and annual dues
Disaggregation Of Revenue [Line Items]
Contract with customer, liability	110	76
Bonus point incentive liability
Disaggregation Of Revenue [Line Items]
Contract with customer, liability	108	106
Deferred maintenance fees
Disaggregation Of Revenue [Line Items]
Contract with customer, liability	18	14
Other deferred revenue
Disaggregation Of Revenue [Line Items]
Contract with customer, liability	$ 36	$ 42