VACATION OWNERSHIP NOTES RECEIVABLE - Interest Income Associated With Vacation Ownership Notes Receivable (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 69	$ 45	$ 201	$ 113
Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	58	42	176	95
Non-Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 11	$ 3	$ 25	$ 18