LEASES (Maturity of Lease Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019
Finance Lease Liabilities, Payments, Due [Abstract]
2021	$ 18.6
2022	12.8
2023	12.8
2024	12.8
2025	11.4
Thereafter	31.7
Total minimum lease payments	100.1
Less: effect of discounting	17.4
Present value of future minimum lease payments	82.7
Less: current obligations under leases	14.4	$ 6.5
Long-term lease obligations	68.3	$ 18.4
Operating Lease Liabilities, Payments Due [Abstract]
2021	282.1
2022	261.3
2023	239.1
2024	237.7
2025	197.3
Thereafter	1,027.7
Total minimum lease payments	2,245.2
Less: effect of discounting	840.0
Present value of future minimum lease payments	1,405.2		$ 853.9
Less: current obligations under leases	163.9
Long-term lease obligations	$ 1,241.3