LEASES - Schedule of lease maturity (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Finance Leases
2020 (remaining period of the year)	$ 11.1
2021	13.6
2022	12.5
2023	10.6
2024	10.5
Thereafter	56.0
Total future minimum lease payments	114.3
Less imputed interest	42.9
Total lease payments	71.4
Less current portion of lease liabilities	11.4
Long-term lease liabilities	60.0
Operating Leases
2020 (remaining period of the year)	43.0
2021	56.0
2022	45.6
2023	39.4
2024	29.0
Thereafter	132.7
Total future minimum lease payments	345.7
Less imputed interest	104.1
Total lease payments	241.6
Less current portion of lease liabilities	40.4
Long-term lease liabilities	$ 201.2	$ 10.5