SECURITIZED DEBT - Additional Information (Details)				3 Months Ended
	Nov. 07, 2019 USD ($)	Oct. 10, 2019 USD ($)	May 23, 2019 USD ($)	Sep. 30, 2019 USD ($) Loan	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Debt Instrument [Line Items]
Values of vacation ownership notes receivable that were purchased by trust during the period			$ 459,000,000
Number of notes receivable pools under performance triggers | Loan				0
Number of notes receivable pools out of compliance | Loan				0
Number of notes receivable pools outstanding | Loan				11
Securitized debt, net				$ 1,686,000,000		$ 1,714,000,000
Warehouse Credit Facility
Debt Instrument [Line Items]
Proceeds from vacation ownership notes receivable securitizations				57,000,000	$ 124,000,000
Values of vacation ownership notes receivable that were securitized during the period				$ (67,000,000)	$ (146,000,000)
Advance rate for securitization				85.00%	85.00%
Cash flows between transferee and transferor proceeds				$ 57,000,000	$ 123,000,000
Cash flows between transferee and transfer or funding of restricted cash (less than for third quarter of 2019)				(1,000,000)	$ (1,000,000)
Warehouse Credit Facility
Debt Instrument [Line Items]
Credit facility				250,000,000
Variable Interest Entity
Debt Instrument [Line Items]
Securitized debt, net				$ 1,680,000,000		1,706,000,000
Secured Debt | MVW 2019-1 LLC
Debt Instrument [Line Items]
Proceeds from vacation ownership notes receivable securitizations			$ 450,000,000
Debt, stated interest rate				2.94%
Secured Debt | MVW 2019-1 LLC | Class A Notes
Debt Instrument [Line Items]
Principal amount				$ 350,000,000
Debt, stated interest rate				2.89%
Secured Debt | MVW 2019-1 LLC | Class B Notes
Debt Instrument [Line Items]
Principal amount				$ 67,000,000
Debt, stated interest rate				3.00%
Secured Debt | MVW 2019-1 LLC | Class C Notes
Debt Instrument [Line Items]
Principal amount				$ 33,000,000
Debt, stated interest rate				3.33%
Secured Debt | Variable Interest Entity
Debt Instrument [Line Items]
Securitized debt, net				$ 1,624,000,000		1,590,000,000
Secured Debt | Variable Interest Entity | Warehouse Credit Facility
Debt Instrument [Line Items]
Securitized debt, net				$ 56,000,000		$ 116,000,000
Subsequent Event
Debt Instrument [Line Items]
Values of vacation ownership notes receivable that were purchased by trust during the period		$ 315,000,000
Subsequent Event | Secured Debt | MVW 2019-2 LLC
Debt Instrument [Line Items]
Debt, stated interest rate		2.29%
Subsequent Event | Secured Debt | MVW 2019-2 LLC | Class A Notes
Debt Instrument [Line Items]
Principal amount		$ 232,000,000
Debt, stated interest rate		2.22%
Subsequent Event | Secured Debt | MVW 2019-2 LLC | Class B Notes
Debt Instrument [Line Items]
Principal amount		$ 54,000,000
Debt, stated interest rate		2.44%
Subsequent Event | Secured Debt | MVW 2019-2 LLC | Class C Notes
Debt Instrument [Line Items]
Principal amount		$ 23,000,000
Debt, stated interest rate		2.68%
Subsequent Event | Debt | MVW 2019-2 LLC
Debt Instrument [Line Items]
Values of vacation ownership notes receivable that were securitized during the period	$ (44,000,000)	$ (236,000,000)
Decrease in restricted cash	$ 42,000,000