TIMESHARE FINANCING RECEIVABLES - Schedule of Gross Timeshare Financing Receivables by Origination Year and Average FICO Score (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Originated
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	$ 1,172
One year prior to current fiscal year	658
Two years prior to current fiscal year	458
Three years prior to current fiscal year	181
Four years prior to current fiscal year	45
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	193
Timeshare financing receivables, gross	2,707		$ 2,096
2024	2
2023	4
2022	38
2021	22
2020	4
Prior	16
Total	86	$ 55
Originated | 700+
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	766
One year prior to current fiscal year	398
Two years prior to current fiscal year	277
Three years prior to current fiscal year	110
Four years prior to current fiscal year	25
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	110
Timeshare financing receivables, gross	1,686		1,288
Originated | 600-699
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	272
One year prior to current fiscal year	174
Two years prior to current fiscal year	132
Three years prior to current fiscal year	48
Four years prior to current fiscal year	9
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	44
Timeshare financing receivables, gross	679		531
Originated | Less than 600
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	25
One year prior to current fiscal year	23
Two years prior to current fiscal year	18
Three years prior to current fiscal year	7
Four years prior to current fiscal year	1
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	6
Timeshare financing receivables, gross	80		70
Originated | No score
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	109
One year prior to current fiscal year	63
Two years prior to current fiscal year	31
Three years prior to current fiscal year	16
Four years prior to current fiscal year	10
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	33
Timeshare financing receivables, gross	262		207
Acquired
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	25
One year prior to current fiscal year	377
Two years prior to current fiscal year	185
Three years prior to current fiscal year	150
Four years prior to current fiscal year	122
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	372
Timeshare financing receivables, gross	1,231		765
2024	0
2023	45
2022	25
2021	28
2020	24
Prior	73
Total	195	$ 94
Acquired | 700+
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	18
One year prior to current fiscal year	245
Two years prior to current fiscal year	102
Three years prior to current fiscal year	79
Four years prior to current fiscal year	59
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	170
Timeshare financing receivables, gross	673		322
Acquired | 600-699
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	7
One year prior to current fiscal year	97
Two years prior to current fiscal year	58
Three years prior to current fiscal year	53
Four years prior to current fiscal year	38
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	120
Timeshare financing receivables, gross	373		209
Acquired | Less than 600
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	0
One year prior to current fiscal year	3
Two years prior to current fiscal year	2
Three years prior to current fiscal year	5
Four years prior to current fiscal year	7
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	21
Timeshare financing receivables, gross	38		42
Acquired | No score
Financing Receivable, Recorded Investment [Line Items]
Current fiscal year	0
One year prior to current fiscal year	32
Two years prior to current fiscal year	23
Three years prior to current fiscal year	13
Four years prior to current fiscal year	18
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	61
Timeshare financing receivables, gross	$ 147		$ 192