DERIVATIVE FINANCIAL INSTRUMENTS (Details 1) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Notional amount	$ 257.4	$ 174.6	$ 168.6
Forward Contracts
Derivative [Line Items]
Notional amount	162.3	140.6		$ 110.5
Forward Contracts Sell
Derivative [Line Items]
Notional amount	84.8	99.2		$ 89.7
Natural Gas Commodity Forward Contracts
Derivative [Line Items]
Notional amount	75.4	62.9	75.7
Ethane Commodity Forward Contracts
Derivative [Line Items]
Notional amount	59.1	51.5	42.7
Metals Commodity Forward Contracts
Derivative [Line Items]
Notional amount	$ 122.9	$ 60.2	$ 50.2