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EMPLOYEE BENEFIT PLANS - Economic actuarial assumptions and biometric data (Details) - Pension defined benefit plans [member]
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
EMPLOYEE BENEFIT PLANS    
Retirement age 65 years 65 years
Percentage of retirees who are married 90.00% 90.00%
Family composition Men 4 years + old Men 4 years + old
Permanency in the plan 100.00% 100.00%
Discount rate    
EMPLOYEE BENEFIT PLANS    
Nominal discount rate – medical assistance and life insurance 9.14% 10.07%
Medical cost growth rate    
EMPLOYEE BENEFIT PLANS    
Medical cost growth rate 6.86% 6.86%
Nominal inflation    
EMPLOYEE BENEFIT PLANS    
Nominal inflation 3.50% 3.50%
Ages: 0 to 24 years    
EMPLOYEE BENEFIT PLANS    
Aging factor 1.50% 1.50%
Ages: 25 to 54 years    
EMPLOYEE BENEFIT PLANS    
Aging factor 2.50% 2.50%
Ages: 55 to 79 years    
EMPLOYEE BENEFIT PLANS    
Aging factor 4.50% 4.50%
Ages: Above 80 years    
EMPLOYEE BENEFIT PLANS    
Aging factor 2.50% 2.50%
Actuarial assumption of mortality rates [member]    
EMPLOYEE BENEFIT PLANS    
Biometric table of general mortality AT-2000 AT-2000
Biometric table of mortality for disabled persons IAPB 57 IAPB 57
Turnover 1.00% 1.00%