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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Derivative instruments - Trading derivatives - Liabilities (Details) - COP ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of financial liabilities [line items]    
Financial liabilities $ 249,900,662 $ 247,219,098
Financial liabilities at fair value through profit or loss, category [member]    
Disclosure of financial liabilities [line items]    
Financial liabilities 2,371,927 1,761,174
Trading derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member]    
Disclosure of financial liabilities [line items]    
Financial liabilities 2,154,361 1,757,606
Derivatives [member] | Trading derivatives [member]    
Disclosure of financial liabilities [line items]    
Financial liabilities 2,154,361 1,757,606
Derivatives [member] | Trading derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member]    
Disclosure of financial liabilities [line items]    
Notional amount 64,716,179 62,639,638
Financial liabilities 2,154,361 1,757,606
Derivatives [member] | Trading derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] | Central counterparties [member]    
Disclosure of financial liabilities [line items]    
Notional amount 15,739,527 20,116,392
Financial liabilities $ 10,399 $ 11,213