Annual report pursuant to Section 13 and 15(d)

COMMITMENTS AND CONTINGENCIES (Details)

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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Loss Contingencies [Line Items]    
Accrual for Environmental Loss Contingencies $ 2.5 $ 2.9
Capital Addition Purchase Commitments [Member]    
Loss Contingencies [Line Items]    
Unrecorded Unconditional Purchase Obligation 830.0  
Unrecorded Unconditional Purchase Obligation, Purchases 180.0  
Unrecorded Unconditional Purchase Obligation, Due in Next Twelve Months 425.0  
Unrecorded Unconditional Purchase Obligation, Due within Two Years $ 225.0