DERIVATIVE FINANCIAL INSTRUMENTS (Details 1) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Derivative [Line Items]
Notional amount	$ 250.8	$ 214.1	$ 225.1
Forward Contracts
Derivative [Line Items]
Notional amount	270.8	169.9	176.6
Forward Contracts Sell
Derivative [Line Items]
Notional amount	99.7	113.6	111.7
Natural Gas Commodity Forward Contracts
Derivative [Line Items]
Notional amount	57.3	74.1	59.3
Ethane Commodity Forward Contracts
Derivative [Line Items]
Notional amount	44.8	51.8	48.2
Metals Commodity Forward Contracts
Derivative [Line Items]
Notional amount	$ 148.7	$ 88.2	$ 117.6