VACATION OWNERSHIP NOTES RECEIVABLE - Vacation Ownership Notes Receivable, Brand and FICO score (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	$ 2,766	$ 2,589
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	201	271
Acquired | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	101	136
Acquired | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	100	135
Acquired | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	110	147
Acquired | 700 + | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	51	67
Acquired | 700 + | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	59	80
Acquired | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	74	100
Acquired | 600 - 699 | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	35	47
Acquired | 600 - 699 | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	39	53
Acquired | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	5	7
Acquired | Less Than 600 | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	4	6
Acquired | Less Than 600 | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1	1
Acquired | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	12	17
Acquired | No Score | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	11	16
Acquired | No Score | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1	1
Originated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2,565	2,318
Originated | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2,307	2,092
Originated | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	258	226
Originated | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1,521	1,367
Originated | 700 + | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1,341	1,210
Originated | 700 + | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	180	157
Originated | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	674	613
Originated | 600 - 699 | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	602	549
Originated | 600 - 699 | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	72	64
Originated | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	59	58
Originated | Less Than 600 | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	57	55
Originated | Less Than 600 | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2	3
Originated | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	311	280
Originated | No Score | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	307	278
Originated | No Score | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	$ 4	$ 2