REVENUE AND RECEIVABLES - Sources of Revenue by Segment (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 4,625	$ 4,405	$ 4,363
Cost reimbursements	1,689	1,561	1,367
Financing	342	322	293
Total Revenues	4,967	4,727	4,656
Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,448	1,460	1,618
Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	270	257	245
Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	214	201	195
Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	359	355	387
Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	843	813	827
Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	645	571	551
Operating Segments
Disaggregation of Revenue [Line Items]
Total Revenues	4,961	4,730	4,633
Corporate and Other
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	6	(3)	23
Cost reimbursements	(43)	(42)	(44)
Financing	0	0	0
Total Revenues	6	(3)	23
Corporate and Other \| Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Corporate and Other \| Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Corporate and Other \| Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	(5)	(3)	(5)
Corporate and Other \| Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	54	42	72
Corporate and Other \| Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	49	39	67
Corporate and Other \| Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Vacation Ownership \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4,388	4,146	4,049
Cost reimbursements	1,723	1,587	1,388
Financing	342	322	293
Total Revenues	4,730	4,468	4,342
Vacation Ownership \| Operating Segments \| Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	1,448	1,460	1,618
Vacation Ownership \| Operating Segments \| Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	266	252	241
Vacation Ownership \| Operating Segments \| Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	207	180	166
Vacation Ownership \| Operating Segments \| Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	139	136	127
Vacation Ownership \| Operating Segments \| Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	612	568	534
Vacation Ownership \| Operating Segments \| Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	605	531	509
Exchange & Third-Party Management \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	231	262	291
Cost reimbursements	9	16	23
Financing	0	0	0
Total Revenues	231	262	291
Exchange & Third-Party Management \| Operating Segments \| Sale of vacation ownership products
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	0	0	0
Exchange & Third-Party Management \| Operating Segments \| Ancillary revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	4	5	4
Exchange & Third-Party Management \| Operating Segments \| Management fee revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	12	24	34
Exchange & Third-Party Management \| Operating Segments \| Exchange and other services revenues
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	166	177	188
Exchange & Third-Party Management \| Operating Segments \| Management and exchange
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	182	206	226
Exchange & Third-Party Management \| Operating Segments \| Rental
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 40	$ 40	$ 42