BUSINESS SEGMENTS - Assets (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Consolidated Assets	$ 9,453	$ 9,639
Operating segments
Segment Reporting Information [Line Items]
Consolidated Assets	8,887	8,902
Operating segments | Vacation Ownership
Segment Reporting Information [Line Items]
Consolidated Assets	8,057	8,037
Operating segments | Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Consolidated Assets	830	865
Corporate and Other
Segment Reporting Information [Line Items]
Consolidated Assets	$ 566	$ 737