v3.26.1
RISK MANAGEMENT - Credit quality of financial assets (excluding loan portfolio) - Investments in debt securities at FVOCI (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 measured at fair value through other comprehensive income, category [member]    
Disclosure of financial assets [line items]    
Financial assets 28,455,957 27,050,198
Investment securities at fair value [member]    
Disclosure of financial assets [line items]    
Financial assets 30,055,436 28,472,926
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]    
Disclosure of financial assets [line items]    
Financial assets 28,455,957 27,050,198
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 2,403,425 21,663,653
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 25,981,403 5,128,206
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets 71,129 258,339
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member]    
Disclosure of financial assets [line items]    
Financial assets 28,455,957 27,050,198
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 2,403,425 21,663,653
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 25,981,403 5,128,206
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets 71,129 258,339
Sovereign | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,306,564 19,577,886
Sovereign | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 24,622,925 3,192,832
Sovereign | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets 7,895  
Sovereign | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 1,306,564 19,577,886
Sovereign | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 24,622,925 3,192,832
Sovereign | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets 7,895  
Other Public Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 91,016 33,584
Other Public Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 415,235 429,161
Other Public Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 91,016 33,584
Other Public Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 415,235 429,161
Central Banks | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets   204,855
Central Banks | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets   204,855
Corporate | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 38,230 66,347
Corporate | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 159,981 367,087
Corporate | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   214,110
Corporate | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 38,230 66,347
Corporate | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 159,981 367,087
Corporate | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets   214,110
Financial Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 915,762 1,447,702
Financial Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 774,550 1,134,852
Financial Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets 63,234 44,229
Financial Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 915,762 1,447,702
Financial Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 774,550 1,134,852
Financial Entities | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Without grade or not available [member]    
Disclosure of financial assets [line items]    
Financial assets 63,234 44,229
Multilaterals | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 51,853 333,279
Multilaterals | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets 8,712 4,274
Multilaterals | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Investment grade [member]    
Disclosure of financial assets [line items]    
Financial assets 51,853 333,279
Multilaterals | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | 12-month expected credit losses [member] | Speculative grade [member]    
Disclosure of financial assets [line items]    
Financial assets $ 8,712 $ 4,274