BUSINESS SEGMENTS - Depreciation and Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	$ 146	$ 123	$ 141
Operating Segments
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	137	111	115
Operating Segments | Vacation Ownership
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	89	79	68
Operating Segments | Exchange & Third-Party Management
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	48	32	47
Corporate and other
Reconciliation of Depreciation by Segment [Line Items]
Depreciation and amortization	$ 9	$ 12	$ 26