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TAXATION - Adiitional information (Details) - ARS ($)
$ in Millions
1 Months Ended 6 Months Ended 12 Months Ended 36 Months Ended
Jun. 30, 2021
Dec. 31, 2019
Dec. 31, 2017
Jun. 30, 2021
Jun. 30, 2021
Jun. 30, 2021
Income Taxes [Line Items]            
Applicable tax rate 25.00% 30.00% 35.00%     30.00%
Dividends tax (as a percent)       7.00%    
Accumulated net taxable income with 25%         $ 5  
Accumulated net taxable income with 35%         50  
Maximum            
Income Taxes [Line Items]            
Accumulated net taxable income with 30%         50  
Minimum            
Income Taxes [Line Items]            
Accumulated net taxable income with 30%         $ 5