v3.26.1
INVESTMENT SECURITIES - Equity instruments through OCI - Tabular disclosure (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets [line items]    
Financial assets $ 305,457,293 $ 304,853,883
Investments in equity instruments designated at fair value through other comprehensive income [member]    
Disclosure of financial assets [line items]    
Financial assets 1,599,479 1,421,303
Investment securities at fair value [member]    
Disclosure of financial assets [line items]    
Financial assets 30,055,436 28,472,926
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member]    
Disclosure of financial assets [line items]    
Financial assets 1,599,479 1,421,303
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Grupo Energia Bogota S.A. E.S.P.    
Disclosure of financial assets [line items]    
Financial assets 1,411,637 1,159,729
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Port operating companies    
Disclosure of financial assets [line items]    
Financial assets 62,315 45,396
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Holding Bursatil Regional S.A.    
Disclosure of financial assets [line items]    
Financial assets 46,496 40,942
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Titularizadora Colombiana S.A.    
Disclosure of financial assets [line items]    
Financial assets 32,486 31,451
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Others    
Disclosure of financial assets [line items]    
Financial assets $ 46,545 42,302
Equity investments [member] | Investment securities at fair value [member] | Investments in equity instruments designated at fair value through other comprehensive income [member] | Mineros S.A.    
Disclosure of financial assets [line items]    
Financial assets   $ 101,483