BUSINESS SEGMENTS - Reconciliation of Adjusted EBITDA to Net Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Segment Reporting Information [Line Items]
Corporate and other	$ (54)	$ (45)	$ (162)	$ (140)
Interest expense	(34)	(41)	(91)	(128)
Tax provision	(59)	(47)	(134)	(63)
Depreciation and amortization	(33)	(35)	(98)	(112)
Share-based compensation expense	(10)	(11)	(30)	(33)
Certain items	(39)	(61)	(71)	(114)
Net income (loss) attributable to common shareholders	109	10	303	(12)
Vacation Ownership
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	299	215	772	465
Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	$ 39	$ 35	$ 117	$ 113