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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS - Assumptions (Details)
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Pension Benefits    
Benefit Obligation Assumptions:    
Discount rate 5.29% 5.52%
Rate of increase in compensation levels 3.49% 3.95%
Net Periodic Benefit Cost Assumptions:    
Discount rate 5.52% 4.98%
Rate of increase in compensation levels 3.95% 3.96%
Assumed long-term rate of return on assets 5.49% 6.13%
Postretirement Benefits    
Benefit Obligation Assumptions:    
Discount rate 5.45% 5.68%
Rate of increase in compensation levels 0.00% 0.00%
Net Periodic Benefit Cost Assumptions:    
Discount rate 5.68% 5.12%
Rate of increase in compensation levels 0.00% 0.00%
Assumed long-term rate of return on assets 0.00% 0.00%