VACATION OWNERSHIP NOTES RECEIVABLE - Vacation Ownership Notes Receivable, Brand and FICO score (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	$ 2,617	$ 2,589
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	248	271
Acquired | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	125	136
Acquired | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	123	135
Acquired | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	135	147
Acquired | 700 + | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	63	67
Acquired | 700 + | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	72	80
Acquired | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	92	100
Acquired | 600 - 699 | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	43	47
Acquired | 600 - 699 | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	49	53
Acquired | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	6	7
Acquired | Less Than 600 | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	5	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	15	17
Acquired | No Score | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	14	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	2,369	2,318
Originated | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2,136	2,092
Originated | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	233	226
Originated | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1,392	1,367
Originated | 700 + | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1,230	1,210
Originated | 700 + | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	162	157
Originated | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	620	613
Originated | 600 - 699 | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	554	549
Originated | 600 - 699 | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	66	64
Originated | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	57	58
Originated | Less Than 600 | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	55	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	300	280
Originated | No Score | Combined Marriott [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	297	278
Originated | No Score | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	$ 3	$ 2