LEASES - OTHER INFORMATION (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Other information
Non-cash activity - right of use asset obtained in exchange for finance lease liabilities	$ 0.0	$ 30.3
Weighted average remaining lease term	50 years	51 years
Weighted average discount rate	4.20%	4.20%