LEASES (Maturity of Lease Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Finance Lease Liabilities, Payments, Due [Abstract]
2020	$ 7.8
2021	7.8
2022	2.0
2023	2.0
2024	2.0
Thereafter	8.8
Total minimum lease payments	30.4
Less: effect of discounting	5.5
Present value of future minimum lease payments	24.9
Less: current obligations under leases	6.5		$ 0.0
Long-term lease obligations	18.4		$ 0.0
Operating Lease Liabilities, Payments Due [Abstract]
2020	222.4
2021	188.3
2022	168.9
2023	159.2
2024	159.6
Thereafter	449.9
Total minimum lease payments	1,348.3
Less: effect of discounting	393.1
Present value of future minimum lease payments	955.2	$ 853.9
Less: current obligations under leases	151.2
Long-term lease obligations	$ 804.0