BUSINESS SEGMENTS - Capital Expenditures (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting, Other Significant Reconciling Item
Capital Expenditures	$ 297	$ 202	$ 293
Operating Segments
Segment Reporting, Other Significant Reconciling Item
Capital Expenditures	299	198	280
Operating Segments | Vacation Ownership
Segment Reporting, Other Significant Reconciling Item
Capital Expenditures	296	191	266
Operating Segments | Exchange & Third-Party Management
Segment Reporting, Other Significant Reconciling Item
Capital Expenditures	3	7	14
Corporate and other
Segment Reporting, Other Significant Reconciling Item
Capital Expenditures	$ (2)	$ 4	$ 13