LEASES - Additional Information (Details) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019 USD ($) renewal_option	Dec. 31, 2019 USD ($) renewal_option
Lessee, Lease, Description [Line Items]
Number of renewals (or more than) | renewal_option	1	1
Term of lease not commenced		20 years
Minimum
Lessee, Lease, Description [Line Items]
Renewal term		5 years
Maximum
Lessee, Lease, Description [Line Items]
Lease term		20 years
Renewal term		10 years
Renaissance New York Times Square Hotel
Lessee, Lease, Description [Line Items]
Impairment loss	$ 78
Impairment of long-lived assets	$ 21
Legacy-Starwood Office Building
Lessee, Lease, Description [Line Items]
Impairment loss from leased asset		$ 34