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PENSION AND OTHER POSTRETIREMENT BENEFITS - WEIGHTED-AVERAGE ASSUMPTIONS (Details)
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Pension Benefits      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount Rate 3.02% 2.73%  
Rate of Compensation Increase 3.00% 3.00%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount Rate 2.73% 3.49% 4.39%
Expected Long-Term Return on Plan Assets 7.25% 7.25% 7.25%
Rate of Compensation Increase 3.00% 3.00% 3.50%
Other Postretirement Benefits      
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]      
Discount Rate 2.99% 2.61%  
Rate of Compensation Increase 3.00% 3.00%  
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Net Periodic Benefit Cost [Abstract]      
Discount Rate 2.61% 3.43% 4.31%
Expected Long-Term Return on Plan Assets 6.75% 6.75% 6.75%
Rate of Compensation Increase 3.00% 3.00% 3.50%