VARIABLE INTEREST ENTITIES - Interest Income and Expense Recognized as a Result of Our Involvement with Variable Interest Entities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Variable Interest Entity [Line Items]
Interest income	$ 79	$ 71	$ 231	$ 209
Administrative expenses	57	$ 62	189	$ 187
Variable interest entity
Variable Interest Entity [Line Items]
Interest income	70		205
Interest expense	21		59
Debt issuance cost amortization	2		8
Administrative expenses			1
Variable interest entity | Vacation Ownership Notes Receivable Securitizations
Variable Interest Entity [Line Items]
Interest income	59		180
Interest expense	17		48
Debt issuance cost amortization	2		7
Administrative expenses			1
Variable interest entity | Warehouse Credit Facility
Variable Interest Entity [Line Items]
Interest income	11		25
Interest expense	4		11
Debt issuance cost amortization	$ 0		1
Administrative expenses			$ 0