VARIABLE INTEREST ENTITIES - Classifications of Consolidated VIE Assets and Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Variable Interest Entity [Line Items]
Consolidated Assets	$ 9,482	$ 9,639
Consolidated Liabilities	7,004	$ 7,141
Variable interest entity
Variable Interest Entity [Line Items]
Consolidated Assets	1,955
Consolidated Liabilities	2,055
Variable interest entity | Securitized debt
Variable Interest Entity [Line Items]
Consolidated Liabilities	2,052
Variable interest entity | Vacation ownership notes receivable, net of reserves
Variable Interest Entity [Line Items]
Consolidated Assets	1,863
Variable interest entity | Interest receivable
Variable Interest Entity [Line Items]
Consolidated Assets	14
Variable interest entity | Restricted cash
Variable Interest Entity [Line Items]
Consolidated Assets	78
Variable interest entity | Interest payable
Variable Interest Entity [Line Items]
Consolidated Liabilities	3
Variable interest entity | Vacation Ownership Notes Receivable Securitizations
Variable Interest Entity [Line Items]
Consolidated Assets	1,746
Consolidated Liabilities	1,865
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Securitized debt
Variable Interest Entity [Line Items]
Consolidated Liabilities	1,863
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Vacation ownership notes receivable, net of reserves
Variable Interest Entity [Line Items]
Consolidated Assets	1,666
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Interest receivable
Variable Interest Entity [Line Items]
Consolidated Assets	12
Variable interest entity | Vacation Ownership Notes Receivable Securitizations | Restricted cash
Variable Interest Entity [Line Items]
Consolidated Assets	68
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	209
Consolidated Liabilities	190
Variable interest entity | Warehouse Credit Facility | Securitized debt
Variable Interest Entity [Line Items]
Consolidated Liabilities	189
Variable interest entity | Warehouse Credit Facility | Vacation ownership notes receivable, net of reserves
Variable Interest Entity [Line Items]
Consolidated Assets	197
Variable interest entity | Warehouse Credit Facility | Interest receivable
Variable Interest Entity [Line Items]
Consolidated Assets	2
Variable interest entity | Warehouse Credit Facility | Restricted cash
Variable Interest Entity [Line Items]
Consolidated Assets	10
Variable interest entity | Warehouse Credit Facility | Interest payable
Variable Interest Entity [Line Items]
Consolidated Liabilities	$ 1