BUSINESS SEGMENTS - Reconciliation of Adjusted EBITDA to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Corporate and other	$ (48)	$ (55)	$ (106)	$ (118)
Interest expense, net	(43)	(36)	(83)	(70)
Tax provision	(10)	(50)	(45)	(91)
Depreciation and amortization	(35)	(34)	(73)	(66)
Share-based compensation expense	(9)	(12)	(16)	(19)
Certain items	(23)	0	(43)	(2)
NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS	37	90	84	177
Vacation Ownership
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	180	245	393	474
Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	$ 25	$ 32	$ 57	$ 69