v3.26.1
RISK MANAGEMENT - Trading book risk - Liabilities (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities $ 278,063,105 $ 274,729,544
Market risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 1,986,281 1,033,592
Financial liabilities at fair value through profit or loss, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 1,986,281 1,033,592
Trading derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 1,951,439 1,011,934
Derivatives [member] | Hedging instruments [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 34,842 21,658
Derivatives [member] | Hedging instruments [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 34,842 21,658
Derivatives [member] | Hedging instruments [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] | Market risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 34,842 21,658
Derivatives [member] | Trading derivatives [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 1,951,439 1,011,934
Derivatives [member] | Trading derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 1,951,439 1,011,934
Derivatives [member] | Trading derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] | Market risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities $ 1,951,439 $ 1,011,934