VARIABLE INTEREST ENTITIES - Cash Flows Between Company and Variable Interest Entities (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Vacation Ownership Notes Receivable Securitizations
Cash Inflows [Abstract]
Proceeds from vacation ownership notes receivable securitizations	$ 396	$ 371
Principal receipts	375	413
Interest receipts	178	174
Reserve release	16	153
Total	965	1,111
Cash Outflows [Abstract]
Principal payments	(389)	(446)
Voluntary repurchases of defaulted vacation ownership notes receivable	(88)	(69)
Voluntary clean-up call	(19)	(39)
Interest payments	(51)	(34)
Funding of restricted cash	(17)	(95)
Total	(564)	(683)
Cash Flows Between Transferee and Transferor Net	401	428
Warehouse Credit Facility
Cash Inflows [Abstract]
Proceeds from vacation ownership notes receivable securitizations	515	234
Principal receipts	43	12
Interest receipts	24	5
Reserve release	9	1
Total	591	252
Cash Outflows [Abstract]
Principal payments	(34)	(3)
Voluntary repurchases of defaulted vacation ownership notes receivable	(2)	0
Repayment of Warehouse Credit Facility	(296)	(98)
Interest payments	(9)	(2)
Funding of restricted cash	(18)	(2)
Total	(359)	(105)
Cash Flows Between Transferee and Transferor Net	$ 232	$ 147