BUSINESS SEGMENTS - Revenues (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	$ 1,252	$ 1,052	$ 3,468	$ 2,790
Vacation Ownership
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	1,182	974	3,229	2,518
Exchange & Third-Party Management
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	71	77	229	249
Operating segments
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	1,253	1,051	3,458	2,767
Operating segments | Vacation Ownership
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	1,182	974	3,229	2,518
Operating segments | Exchange & Third-Party Management
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	71	77	229	249
Corporate and Other
Segment Reporting, Asset Reconciling Item [Line Items]
Total Revenues	$ (1)	$ 1	$ 10	$ 23