VACATION OWNERSHIP NOTES RECEIVABLE - Legacy-ILG Vacation Ownership Notes Receivable, Brand and FICO score (Details) - Legacy-ILG and Legacy-Welk - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	$ 1,118	$ 821
Acquired
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	444	369
Acquired | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	95	144
Acquired | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	133	198
Acquired | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	15	22
Acquired | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	197
Acquired | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	4	5
Acquired | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	231	176
Acquired | 700 + | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	52	81
Acquired | 700 + | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	54	81
Acquired | 700 + | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	8	12
Acquired | 700 + | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	115
Acquired | 700 + | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2	2
Acquired | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	165	131
Acquired | 600 - 699 | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	32	48
Acquired | 600 - 699 | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	48	73
Acquired | 600 - 699 | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	6	9
Acquired | 600 - 699 | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	79
Acquired | 600 - 699 | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	0	1
Acquired | less than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	13	18
Acquired | less than 600 | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	3	4
Acquired | less than 600 | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	8	13
Acquired | less than 600 | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1	1
Acquired | less than 600 | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1
Acquired | less than 600 | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	0	0
Acquired | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	35	44
Acquired | No Score | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	8	11
Acquired | No Score | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	23	31
Acquired | No Score | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	0	0
Acquired | No Score | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2
Acquired | No Score | Other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	2	2
Originated
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	674	451
Originated | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	251	190
Originated | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	296	237
Originated | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	33	24
Originated | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	94
Originated | 700 +
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	366	231
Originated | 700 + | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	143	109
Originated | 700 + | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	136	106
Originated | 700 + | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	22	16
Originated | 700 + | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	65
Originated | 600 - 699
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	198	132
Originated | 600 - 699 | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	66	52
Originated | 600 - 699 | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	94	72
Originated | 600 - 699 | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	11	8
Originated | 600 - 699 | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	27
Originated | less than 600
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	29	22
Originated | less than 600 | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	8	6
Originated | less than 600 | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	20	16
Originated | less than 600 | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	0	0
Originated | less than 600 | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	1
Originated | No Score
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	81	66
Originated | No Score | Westin
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	34	23
Originated | No Score | Sheraton
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	46	43
Originated | No Score | Hyatt
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	0	$ 0
Originated | No Score | Welk
Accounts, Notes, Loans and Financing Receivable [Line Items]
Vacation ownership notes receivable	$ 1