BUSINESS SEGMENTS - Reconciliation of Adjusted EBITDA to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Corporate and other	$ (55)	$ (54)	$ (118)	$ (108)
Interest expense, net	(36)	(30)	(70)	(57)
Tax provision	(50)	(43)	(91)	(75)
Depreciation and amortization	(34)	(32)	(66)	(65)
Share-based compensation expense	(12)	(12)	(19)	(20)
Certain items	0	(2)	(2)	(32)
NET INCOME ATTRIBUTABLE TO COMMON SHAREHOLDERS	90	136	177	194
Vacation Ownership
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	245	274	474	473
Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	$ 32	$ 35	$ 69	$ 78