v3.26.1
RISK MANAGEMENT - Consolidated credit risk exposure (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets $ 290,890,645 $ 292,433,720
Exposure to credit risk outside of the statement of financial position 31,618,592 28,676,421
Maximum exposure to credit risk 322,509,237 321,110,141
Loan commitments and financial guarantee contracts [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Exposure to credit risk outside of the statement of financial position 31,618,592 28,676,421
Financial guarantee contracts [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Exposure to credit risk outside of the statement of financial position 2,199,093 3,082,949
Loan commitments [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Exposure to credit risk outside of the statement of financial position 29,419,499 25,593,472
Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 192,655,943 200,136,125
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 108,308,984 115,414,643
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 1,777,516 705,055
Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 60,456,213 61,976,325
Mortgages [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 22,111,710 22,035,727
Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 1,520 4,375
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 22,216,161 24,138,538
Other accounts receivable at fair value through profit or loss, mandatorily measured at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 2,635,437 4,181,835
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, class [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 15,685,267 13,256,505
Debt securities [member] | Investment securities at amortised cost [member] | Financial assets at amortised cost, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 9,205,457 10,708,367
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 reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 17,582,844 11,937,414
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets   1,425
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 28,455,957 27,050,198
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 reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets 2,217,021 969,294
Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Maximum exposure to credit risk, financial assets $ 236,558 $ 54,019