VACATION OWNERSHIP NOTES RECEIVABLE - Interest Income Associated With Vacation Ownership Notes Receivable (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 63	$ 69	$ 199	$ 201
Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	59	58	186	176
Non-Securitized
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest income	$ 4	$ 11	$ 13	$ 25