VACATION OWNERSHIP NOTES RECEIVABLE - Recorded Investment in Non-accrual Notes Receivable that are Ninety Days or More Past Due (Details) - Legacy-MVW - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Financing Receivable, Past Due [Line Items]
Investment in notes receivable on non-accrual status	$ 50		$ 50		$ 45
Average investment in notes receivable on non-accrual status	50	$ 46	48	$ 46
Non-Securitized
Financing Receivable, Past Due [Line Items]
Investment in notes receivable on non-accrual status	41		41		36
Average investment in notes receivable on non-accrual status	41	40	39	39
Securitized
Financing Receivable, Past Due [Line Items]
Investment in notes receivable on non-accrual status	9		9		$ 9
Average investment in notes receivable on non-accrual status	$ 9	$ 6	$ 9	$ 7