ACQUISITIONS AND DISPOSITIONS - Deferred Revenue Narrative (Details) - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01	Sep. 30, 2019
Business Acquisition [Line Items]
Expected timing of satisfaction, period	2 years
Minimum | Sale of vacation ownership products
Business Acquisition [Line Items]
Expected timing of satisfaction, period	1 year
Maximum | Sale of vacation ownership products
Business Acquisition [Line Items]
Expected timing of satisfaction, period	5 years