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EMPLOYEE BENEFIT PLANS (Weighted-Average Assumptions Used to Determine Net Periodic Benefit Cost) (Details)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Rate of Compensation Increase (in percentage) 2.80% 2.80% 2.80%
Expected Return on Plan Assets (in percentage) 7.00% 7.00% 7.00%
Pension Benefits | Service cost      
Defined Benefit Plan Disclosure [Line Items]      
Discount Rate (in percentage) 4.70% 3.80% 4.40%
Pension Benefits | Interest Cost      
Defined Benefit Plan Disclosure [Line Items]      
Discount Rate (in percentage) 4.20% 3.40% 3.70%
Other Postretirement Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Expected Return on Plan Assets (in percentage) 7.00% 7.00% 7.00%
Other Postretirement Benefits | Service cost      
Defined Benefit Plan Disclosure [Line Items]      
Discount Rate (in percentage) 4.50% 3.80% 4.30%
Other Postretirement Benefits | Interest Cost      
Defined Benefit Plan Disclosure [Line Items]      
Discount Rate (in percentage) 4.00% 3.20% 3.30%