REVENUE AND RECEIVABLES - Sources of Revenue by Segment (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,105	$ 1,178	$ 3,294	$ 3,251
Financing	81	74	239	217
Total Revenues	1,186	1,252	3,533	3,468
Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	319	444	1,085	1,179
Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	63	64	196	186
Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	49	47	150	147
Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	93	87	265	290
Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	205	198	611	623
Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	138	165	435	438
Cost Reimbursement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	443	371	1,163	1,011
Operating segments
Disaggregation of Revenue [Line Items]
Total Revenues	1,190	1,253	3,535	3,458
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	(4)	(1)	(2)	10
Financing	0	0	0	0
Total Revenues	(4)	(1)	(2)	10
Corporate and Other | Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Corporate and Other | Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Corporate and Other | Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	(1)	(2)	(5)
Corporate and Other | Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12	8	31	49
Corporate and Other | Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12	7	29	44
Corporate and Other | Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Corporate and Other | Cost Reimbursement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	(16)	(8)	(31)	(34)
Vacation Ownership | Operating segments
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,045	1,108	3,096	3,012
Financing	81	74	239	217
Total Revenues	1,126	1,182	3,335	3,229
Vacation Ownership | Operating segments | Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	319	444	1,085	1,179
Vacation Ownership | Operating segments | Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	62	63	193	183
Vacation Ownership | Operating segments | Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	44	41	134	124
Vacation Ownership | Operating segments | Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	37	32	98	95
Vacation Ownership | Operating segments | Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	143	136	425	402
Vacation Ownership | Operating segments | Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	128	154	404	405
Vacation Ownership | Operating segments | Cost Reimbursement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	455	374	1,182	1,026
Exchange & Third-Party Management | Operating segments
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	64	71	200	229
Financing	0	0	0	0
Total Revenues	64	71	200	229
Exchange & Third-Party Management | Operating segments | Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0	0
Exchange & Third-Party Management | Operating segments | Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1	1	3	3
Exchange & Third-Party Management | Operating segments | Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	5	7	18	28
Exchange & Third-Party Management | Operating segments | Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	44	47	136	146
Exchange & Third-Party Management | Operating segments | Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	50	55	157	177
Exchange & Third-Party Management | Operating segments | Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	10	11	31	33
Exchange & Third-Party Management | Operating segments | Cost Reimbursement
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 4	$ 5	$ 12	$ 19