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RISK MANAGEMENT POLICIES - Sensitivity to reasonably possible additional variation in interest rates for next year (Details) - ARS ($)
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Argentina, Pesos [member]    
Interest rate risk    
Decrease in the interest rate $ 433,698,000 $ 486,558,000
US Dollar [member]    
Interest rate risk    
Decrease in the interest rate 430,992,000 354,392,000
Interest rate risk [member]    
Interest rate risk    
Decrease in the interest rate (433,698,000.000) (486,558,000.000)
Increase in the interest rate $ 430,992,000.000 $ 354,392,000.000
Interest rate risk [member] | Argentina, Pesos [member]    
Interest rate risk    
Decrease in the interest rate 4.00% 4.00%
Increase in the interest rate 4.00% 4.00%
Interest rate risk [member] | US Dollar [member]    
Interest rate risk    
Decrease in the interest rate 2.00% 2.00%
Increase in the interest rate 2.00% 2.00%