VACATION OWNERSHIP NOTES RECEIVABLE - Origination Year, Vacation Ownership Notes Receivable, Brand and FICO score prior year (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	$ 2,766	$ 2,589
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	201	271
Acquired | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	110	147
Acquired | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	74	100
Acquired | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	5	7
Acquired | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	12	17
Acquired | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	101
Total vacation ownership notes receivable	101	136
Gross write-offs 2021	0
Gross write-offs 2020	0
Gross write-offs 2019 and Prior	11
Gross write-offs	11
Acquired | Combined Marriott | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	51
Total vacation ownership notes receivable	51	67
Acquired | Combined Marriott | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	35
Total vacation ownership notes receivable	35	47
Acquired | Combined Marriott | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	4
Total vacation ownership notes receivable	4	6
Acquired | Combined Marriott | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	11
Total vacation ownership notes receivable	11	16
Acquired | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	6
2020	20
2019 & Prior	74
Total vacation ownership notes receivable	100	135
Gross write-offs 2021	1
Gross write-offs 2020	2
Gross write-offs 2019 and Prior	7
Gross write-offs	10
Acquired | Hyatt And Welk | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	4
2020	13
2019 & Prior	42
Total vacation ownership notes receivable	59	80
Acquired | Hyatt And Welk | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	2
2020	7
2019 & Prior	30
Total vacation ownership notes receivable	39	53
Acquired | Hyatt And Welk | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	1
Total vacation ownership notes receivable	1	1
Acquired | Hyatt And Welk | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
2021	0
2020	0
2019 & Prior	1
Total vacation ownership notes receivable	1	1
Originated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	2,565	2,318
Originated | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	1,521	1,367
Originated | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	674	613
Originated | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	59	58
Originated | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total vacation ownership notes receivable	311	280
Originated | Combined Marriott
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	652
2022	677
2021	382
2020	144
2019 & Prior	452
Total vacation ownership notes receivable	2,307	2,092
Gross write-offs 2023	2
Gross write-offs 2022	14
Gross write-offs 2021	22
Gross write-offs 2020	9
Gross write-offs 2019 and Prior	27
Gross write-offs	74
Originated | Combined Marriott | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	377
2022	413
2021	228
2020	78
2019 & Prior	245
Total vacation ownership notes receivable	1,341	1,210
Originated | Combined Marriott | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	145
2022	174
2021	114
2020	42
2019 & Prior	127
Total vacation ownership notes receivable	602	549
Originated | Combined Marriott | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	13
2022	16
2021	11
2020	5
2019 & Prior	12
Total vacation ownership notes receivable	57	55
Originated | Combined Marriott | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	117
2022	74
2021	29
2020	19
2019 & Prior	68
Total vacation ownership notes receivable	307	278
Originated | Hyatt And Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	102
2022	104
2021	44
2020	3
2019 & Prior	5
Total vacation ownership notes receivable	258	226
Gross write-offs 2023	0
Gross write-offs 2022	6
Gross write-offs 2021	7
Gross write-offs 2020	0
Gross write-offs 2019 and Prior	1
Gross write-offs	14
Originated | Hyatt And Welk | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	73
2022	71
2021	31
2020	2
2019 & Prior	3
Total vacation ownership notes receivable	180	157
Originated | Hyatt And Welk | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	26
2022	31
2021	12
2020	1
2019 & Prior	2
Total vacation ownership notes receivable	72	64
Originated | Hyatt And Welk | Less Than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	0
2022	1
2021	1
2020	0
2019 & Prior	0
Total vacation ownership notes receivable	2	3
Originated | Hyatt And Welk | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
2023	3
2022	1
2021	0
2020	0
2019 & Prior	0
Total vacation ownership notes receivable	$ 4	$ 2