v3.26.1
RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Investments in debt securities at amortized cost (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 amortised cost, category [member]    
Disclosure of financial assets [line items]    
Financial assets 243,432,271 251,981,889
Investment securities [member]    
Disclosure of financial assets [line items]    
Financial assets 39,252,615 39,162,618
Investment securities [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 39,260,893 39,181,293
Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 9,205,457 10,708,367
Debt securities [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 55,244,258 49,697,404
Debt securities [member] | Investment securities [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 39,260,893 39,181,293
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]    
Disclosure of financial assets [line items]    
Financial assets 9,205,457 10,708,367
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,993,990 4,906,250
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 7,211,467 5,634,564
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   167,553
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member]    
Disclosure of financial assets [line items]    
Financial assets 9,205,457 10,639,729
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,993,990 4,906,250
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 7,211,467 5,634,564
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   98,915
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]    
Disclosure of financial assets [line items]    
Financial assets   68,638
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   68,638
Sovereign | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 30,540 2,584,348
Sovereign | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,860,258  
Sovereign | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 30,540 2,584,348
Sovereign | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,860,258  
Other Public Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 5,351,209 5,563,208
Other Public Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 5,351,209 5,563,208
Corporate | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets   64,709
Corporate | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   145,553
Corporate | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets   64,709
Corporate | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   76,915
Corporate | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   68,638
Financial Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,963,450 2,321,902
Financial Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets   6,647
Financial Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   22,000
Financial Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets $ 1,963,450 2,321,902
Financial Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets   6,647
Financial Entities | Investment securities [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   $ 22,000