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ACCOUNTING STANDARDS AND BASIS OF PREPARATION - Allowance for Loan Losses (Details)
 12 Months Ended
Dec. 31, 2024
item
segment
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
BCRA threshold credit risk situation 2
Number of segments | segment 3
Number of scenarios considered to estimate credit losses captured non linealrities 3
Minimum  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Behavior rating probability of default 30.00%
Minimum | Corporate Banking  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Past due accounts that raises significant increase in credit risk 31 days
Maximum  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Number of notes 2
Maximum | Corporate Banking  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Past due accounts that raises significant increase in credit risk 90 days
Personal and Business Banking  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Probably of default that raises significant increase in credit risk 30.00%
Period past for financial instruments in default and credit impaired 90 days
Personal and Business Banking | Minimum  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Past due accounts that raises significant increase in credit risk 31 days
Personal and Business Banking | Maximum  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Past due accounts that raises significant increase in credit risk 90 days
Corporate Banking  
Disclosure of Primary Macroeconomic Drivers of Credit Losses [line items]  
Period past for financial instruments in default and credit impaired 90 days