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RISK MANAGEMENT POLICIES - Paragraphs (Details)
 12 Months Ended
Dec. 31, 2020
factor
Credit risk [member]  
Disclosure of Risk Management [line items]  
Economic capital calculation holding period 1 year
Factoring exposure holding period 6 months
Interest rate risk [member]  
Disclosure of Risk Management [line items]  
Provision utilization holding period 90 days
Percentage of interest rate confidence level 99.00%
Liquidity risk [member]  
Disclosure of Risk Management [line items]  
Number of key factors 2
Liquidity stress level period 30 days
Individuals [member] | Credit risk [member]  
Disclosure of Risk Management [line items]  
Percentage of credit risk confidence level 99.90%
Company [member] | Credit risk [member]  
Disclosure of Risk Management [line items]  
Percentage of credit risk confidence level 99.00%