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EMPLOYEE BENEFITS (Expected Payments for Company's Defined Benefit Pension and Postretirement Plans) (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Post-Retirement Benefit Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 $ 0.6
2019 0.6
2020 0.6
2021 0.5
2022 0.5
2023-2027 2.5
Pension Plans [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2018 2.8
2019 3.0
2020 3.2
2021 3.5
2022 3.7
2023-2027 $ 22.6