Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Weighted Average Assumptions (Details)

v3.20.4
BENEFIT PLANS - Weighted Average Assumptions (Details) - Pension Benefits
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Weighted-average assumptions used to determine benefit obligations    
Discount rate 2.50% 3.40%
Weighted-average assumptions used to determine net periodic benefit cost    
Discount Rate 3.40% 4.41%
Long-term Return on Assets 5.00% 5.25%