VACATION OWNERSHIP NOTES RECEIVABLE - Aging of Recorded Investment in Principal, Vacation Ownership Notes Receivable (Details) - Legacy-MVW - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total past due	$ 122	$ 94
Current	1,359	1,476
Total vacation ownership notes receivable	1,481	1,570
Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	69	50
Current	137	222
Total vacation ownership notes receivable	206	272
Securitized
Financing Receivable, Past Due [Line Items]
Total past due	53	44
Current	1,222	1,254
Total vacation ownership notes receivable	1,275	1,298
31 – 90 days past due
Financing Receivable, Past Due [Line Items]
Total past due	41	40
31 – 90 days past due | Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	7	7
31 – 90 days past due | Securitized
Financing Receivable, Past Due [Line Items]
Total past due	34	33
91 – 150 days past due
Financing Receivable, Past Due [Line Items]
Total past due	25	15
91 – 150 days past due | Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	6	4
91 – 150 days past due | Securitized
Financing Receivable, Past Due [Line Items]
Total past due	19	11
Greater than 150 days past due
Financing Receivable, Past Due [Line Items]
Total past due	56	39
Greater than 150 days past due | Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	56	39
Greater than 150 days past due | Securitized
Financing Receivable, Past Due [Line Items]
Total past due	$ 0	$ 0