VACATION OWNERSHIP NOTES RECEIVABLE - Interest Income Associated With Vacation Ownership Notes Receivable (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 67	$ 67	$ 136	$ 132
Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	64	59	127	118
Non-Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 3	$ 8	$ 9	$ 14