v3.26.1
RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Trading investments in debt securities (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
Financial assets $ 305,457,293 $ 304,853,883
Financial assets at fair value through profit or loss, category [member]    
Disclosure of financial assets [line items]    
Financial assets 31,969,586 24,400,493
Trading securities [member]    
Disclosure of financial assets [line items]    
Financial assets 29,097,591 20,163,214
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 29,097,591 20,163,214
Debt securities [member] | Trading securities [member]    
Disclosure of financial assets [line items]    
Financial assets 17,582,844 11,937,414
Debt securities [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]    
Financial assets 17,582,844 11,937,414
Debt securities [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] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 731,171 10,877,024
Debt securities [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] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 16,851,673 1,060,390
Sovereign | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 492,675 10,699,113
Sovereign | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 15,817,843 17,824
Other Public Entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 107,722 12,450
Other Public Entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 105,357 171,310
Corporate | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 3,781 3,996
Corporate | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 22,896 30,527
Financial Entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 126,993 161,465
Financial Entities | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets $ 905,577 $ 840,729