EMPLOYEE BENEFITS - Schedule of Actuarial Assumptions (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Pension Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	2.40%	3.00%
Compensation/Progression Rate	3.50%	3.50%
Pension Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	2.70%	3.40%
Compensation/Progression Rate	4.00%	4.00%
Other Postretirement Benefits Plan | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	2.50%	3.20%
Other Postretirement Benefits Plan | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	2.60%	3.30%
Pre-65 Plan | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Health care trend rate	6.30%