BUSINESS SEGMENTS - Reconciliation of Adjusted EBITDA to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Segment Reporting Information [Line Items]
Corporate and other	$ (53)	$ (54)	$ (171)	$ (162)
Interest expense, net	(36)	(34)	(106)	(91)
Tax provision	(24)	(59)	(115)	(134)
Depreciation and amortization	(33)	(33)	(99)	(98)
Share-based compensation expense	(6)	(10)	(25)	(30)
Certain items	(9)	(39)	(11)	(71)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	42	109	219	303
Vacation Ownership
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	173	299	647	772
Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	$ 30	$ 39	$ 99	$ 117