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TRANSFERS OF FINANCIAL ASSETS (Details) - Debt securities [member] - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]    
Disclosure of financial assets [line items]    
Financial assets pledged as collateral $ 2,853,286 $ 2,000,025
Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Pledged in money market operations and pledged as collateral to special entities such as CRCC, BR and BVC    
Disclosure of financial assets [line items]    
Financial assets pledged as collateral 2,853,286 1,998,733
Financial assets at amortised cost, category [member]    
Disclosure of financial assets [line items]    
Financial assets pledged as collateral 3,208,890 1,379,758
Financial assets measured at fair value through other comprehensive income, category [member]    
Disclosure of financial assets [line items]    
Financial assets pledged as collateral 10,789,962 7,723,412
Financial assets measured at fair value through other comprehensive income, category [member] | Pledged in money market operations and pledged as collateral to special entities such as CRCC, BR and BVC    
Disclosure of financial assets [line items]    
Financial assets pledged as collateral $ 10,786,312 $ 7,713,235