VARIABLE INTEREST ENTITIES - Classifications of Consolidated VIE Assets and Liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Consolidated Assets	$ 9,237	$ 9,613
Consolidated Liabilities	6,609	$ 6,627
Variable interest entity
Variable Interest Entity [Line Items]
Consolidated Assets	1,741
Consolidated Liabilities	1,832
Variable interest entity | Securitized debt
Variable Interest Entity [Line Items]
Consolidated Liabilities	1,830
Variable interest entity | Vacation ownership notes receivable, net of reserves
Variable Interest Entity [Line Items]
Consolidated Assets	1,662
Variable interest entity | Interest receivable
Variable Interest Entity [Line Items]
Consolidated Assets	12
Variable interest entity | Restricted cash
Variable Interest Entity [Line Items]
Consolidated Assets	67
Variable interest entity | Interest payable
Variable Interest Entity [Line Items]
Consolidated Liabilities	2
Variable interest entity | Vacation Ownership Notes Receivable Securitizations
Variable Interest Entity [Line Items]
Consolidated Assets	1,600
Consolidated Liabilities	1,700
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Securitized debt
Variable Interest Entity [Line Items]
Consolidated Liabilities	1,698
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Vacation ownership notes receivable, net of reserves
Variable Interest Entity [Line Items]
Consolidated Assets	1,527
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Interest receivable
Variable Interest Entity [Line Items]
Consolidated Assets	11
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Restricted cash
Variable Interest Entity [Line Items]
Consolidated Assets	62
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Interest payable
Variable Interest Entity [Line Items]
Consolidated Liabilities	2
Variable interest entity | Warehouse Credit Facility
Variable Interest Entity [Line Items]
Consolidated Assets	141
Consolidated Liabilities	132
Variable interest entity | Warehouse Credit Facility | Securitized debt
Variable Interest Entity [Line Items]
Consolidated Liabilities	132
Variable interest entity | Warehouse Credit Facility | Vacation ownership notes receivable, net of reserves
Variable Interest Entity [Line Items]
Consolidated Assets	135
Variable interest entity | Warehouse Credit Facility | Interest receivable
Variable Interest Entity [Line Items]
Consolidated Assets	1
Variable interest entity | Warehouse Credit Facility | Restricted cash
Variable Interest Entity [Line Items]
Consolidated Assets	5
Variable interest entity | Warehouse Credit Facility | Interest payable
Variable Interest Entity [Line Items]
Consolidated Liabilities	$ 0