BUSINESS SEGMENTS - Assets (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Consolidated Assets	$ 9,867	$ 9,680
Operating segments
Segment Reporting Information [Line Items]
Consolidated Assets	9,129	8,980
Operating segments | Vacation Ownership
Segment Reporting Information [Line Items]
Consolidated Assets	8,327	8,167
Operating segments | Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Consolidated Assets	802	813
Corporate and Other
Segment Reporting Information [Line Items]
Consolidated Assets	$ 738	$ 700