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RISK MANAGEMENT - Regulatory capital management (Details)
 12 Months Ended
Dec. 31, 2023
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Capital Conversion Buffer 1.50%
Systematic Risk Buffer 1.00%
Decrees established a minimum leverage ratio 3.00%
Bottom of range [member]  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Solvency Risk Ratio 9.00%
Basic Solvency Risk Ratio 4.50%
Additional Tier 1 Percentage 6.00%