BUSINESS SEGMENTS - Reconciliation of Adjusted EBITDA to Net Income or Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Corporate and other	$ (186)	$ (113)	$ (219)
Interest expense	(164)	(150)	(132)
Tax (provision) benefit	(74)	84	(83)
Depreciation and amortization	(146)	(123)	(141)
Share-based compensation expense	(51)	(37)	(37)
Certain items	(173)	(284)	(227)
NET INCOME (LOSS) ATTRIBUTABLE TO COMMON SHAREHOLDERS	49	(275)	138
Vacation Ownership
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	699	229	794
Exchange & Third-Party Management
Segment Reporting Information [Line Items]
Adjusted earnings before income taxes depreciation and amortization	$ 144	$ 119	$ 183