VARIABLE INTEREST ENTITIES - Cash Flows Between Company and Variable Interest Entities (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Outflows
Funding of restricted cash	$ (204)
Vacation Ownership Notes Receivable Securitizations
Cash Inflows
Net proceeds from vacation ownership notes receivable securitizations		$ 841	$ 371
Principal receipts		585	487
Interest receipts		228	218
Reserve release		159	16
Total		1,813	1,092
Cash Outflows
Principal to investors		(590)	(509)
Voluntary repurchases of defaulted vacation ownership notes receivable		(99)	(95)	$ (54)
Voluntary clean-up call		(72)	(18)
Interest to investors		(43)	(49)
Funding of restricted cash		(217)	(20)
Total		(1,021)	(691)
Net Cash Flows		792	401
Warehouse Credit Facility
Cash Inflows
Net proceeds from vacation ownership notes receivable securitizations		107	315
Principal receipts		2	34
Interest receipts		2	17
Reserve release		1	2
Total		112	368
Cash Outflows
Principal to investors		0	(33)
Voluntary repurchases of defaulted vacation ownership notes receivable		0	(3)
Repayment of Warehouse Credit Facility		(107)	(300)
Interest to investors		(2)	(4)
Funding of restricted cash		(1)	(2)
Total		(110)	(342)
Net Cash Flows		$ 2	$ 26