VARIABLE INTEREST ENTITIES - Classifications of Consolidated VIE Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Variable Interest Entity [Line Items]
Consolidated Assets	$ 9,613	$ 8,898
Consolidated Liabilities	6,627	$ 6,216
Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	1,813
Consolidated Liabilities	1,879
Securitized debt | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Liabilities	1,877
Vacation ownership notes receivable, net of reserves | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	1,662
Interest receivable | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	12
Restricted cash | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	139
Interest payable | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Liabilities	2
Vacation Ownership Notes Receivable Securitizations | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	1,813
Consolidated Liabilities	1,879
Vacation Ownership Notes Receivable Securitizations | Securitized debt | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Liabilities	1,877
Vacation Ownership Notes Receivable Securitizations | Vacation ownership notes receivable, net of reserves | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	1,662
Vacation Ownership Notes Receivable Securitizations | Interest receivable | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	12
Vacation Ownership Notes Receivable Securitizations | Restricted cash | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	139
Vacation Ownership Notes Receivable Securitizations | Interest payable | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Liabilities	2
Warehouse Credit Facility | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	0
Consolidated Liabilities	0
Warehouse Credit Facility | Securitized debt | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Liabilities	0
Warehouse Credit Facility | Vacation ownership notes receivable, net of reserves | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	0
Warehouse Credit Facility | Interest receivable | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	0
Warehouse Credit Facility | Restricted cash | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Assets	0
Warehouse Credit Facility | Interest payable | Variable Interest Entity
Variable Interest Entity [Line Items]
Consolidated Liabilities	$ 0