REVENUE FROM CONTRACTS WITH CUSTOMERS - Performance Obligations (Details) $ in Millions	6 Months Ended
	Jun. 30, 2020 USD ($)
Owned hotels
Disaggregation of Revenue [Line Items]
Outstanding contract liabilities	$ 14.0
Performance obligation, term	1 year
Franchised Hotels
Disaggregation of Revenue [Line Items]
Outstanding contract liabilities	$ 5.3
Performance obligation, term	20 years