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RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Derivative instruments - Trading derivatives - Assets (Details) - COP ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of financial assets [line items]    
Financial assets $ 304,853,883 $ 280,746,878
Financial assets at fair value through profit or loss, category [member]    
Disclosure of financial assets [line items]    
Financial assets 24,400,493 19,332,588
Trading securities [member]    
Disclosure of financial assets [line items]    
Financial assets 20,163,214 15,451,121
Trading securities [member] | 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 20,163,214 15,451,121
Derivatives [member]    
Disclosure of financial assets [line items]    
Financial assets 1,023,313 2,126,229
Derivatives [member] | Trading securities [member]    
Disclosure of financial assets [line items]    
Financial assets 969,294 2,077,567
Derivatives [member] | Trading securities [member] | 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]    
Notional amount 104,988,291 77,206,096
Financial assets 969,294 2,077,567
Derivatives [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Central counterparties [member]    
Disclosure of financial assets [line items]    
Notional amount 14,317,598 30,658,137
Financial assets $ 10,246 $ 4,272