VACATION OWNERSHIP NOTES RECEIVABLE - Aging of Recorded Investment in Principal, Vacation Ownership Notes Receivable (Details) - Legacy-MVW - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Financing Receivable, Past Due [Line Items]
Total past due	$ 107	$ 94
Current	1,460	1,476
Total vacation ownership notes receivable	1,567	1,570
Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	57	50
Current	180	222
Total vacation ownership notes receivable	237	272
Securitized
Financing Receivable, Past Due [Line Items]
Total past due	50	44
Current	1,280	1,254
Total vacation ownership notes receivable	1,330	1,298
31 – 90 days past due
Financing Receivable, Past Due [Line Items]
Total past due	45	40
31 – 90 days past due | Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	9	7
31 – 90 days past due | Securitized
Financing Receivable, Past Due [Line Items]
Total past due	36	33
91 – 150 days past due
Financing Receivable, Past Due [Line Items]
Total past due	18	15
91 – 150 days past due | Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	4	4
91 – 150 days past due | Securitized
Financing Receivable, Past Due [Line Items]
Total past due	14	11
Greater than 150 days past due
Financing Receivable, Past Due [Line Items]
Total past due	44	39
Greater than 150 days past due | Non-Securitized
Financing Receivable, Past Due [Line Items]
Total past due	44	39
Greater than 150 days past due | Securitized
Financing Receivable, Past Due [Line Items]
Total past due	$ 0	$ 0