v3.26.1
INVESTMENT SECURITIES - Investments in debt securities at fair value through OCI (Details) - Financial assets measured at fair value through other comprehensive income, category [member] - Investment securities at fair value [member] - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Debt securities [member]    
Disclosure of financial assets [line items]    
Cost $ 29,845,450 $ 28,358,760
Unrealized Gain 78,813 66,045
Unrealized Losses (1,468,306) (1,374,607)
Fair Value 28,455,957 27,050,198
ECL 26,602 18,310
Securities issued or secured by Colombian Government    
Disclosure of financial assets [line items]    
Cost 25,992,996 19,278,224
Unrealized Gain 39,800 36,588
Unrealized Losses (1,430,096) (1,046,904)
Fair Value 24,602,700 18,267,908
ECL 22,342 11,761
Securities issued or secured by other Colombian Government entities    
Disclosure of financial assets [line items]    
Cost 517,983 484,874
Unrealized Gain 3,927 336
Unrealized Losses (15,658) (22,465)
Fair Value 506,252 462,745
ECL 1,344 803
Securities issued or secured by foreign Governments    
Disclosure of financial assets [line items]    
Cost 1,319,487 4,682,807
Unrealized Gain 19,762 18,439
Unrealized Losses (4,563) (198,436)
Fair Value 1,334,686 4,502,810
ECL 360 1,135
Securities issued or secured by central banks    
Disclosure of financial assets [line items]    
Cost   251,079
Unrealized Gain   32
Unrealized Losses   (46,256)
Fair Value   204,855
ECL   97
Securities issued or secured by other financial entities    
Disclosure of financial assets [line items]    
Cost 1,746,690 2,640,204
Unrealized Gain 14,660 9,270
Unrealized Losses (7,806) (22,691)
Fair Value 1,753,544 2,626,783
ECL 2,215 2,740
Securities issued or secured by non-financial sector entities    
Disclosure of financial assets [line items]    
Cost 22,478 249,748
Unrealized Gain 252 665
Unrealized Losses (113) (753)
Fair Value 22,617 249,660
ECL 29 859
Other debt securities    
Disclosure of financial assets [line items]    
Cost 245,816 771,824
Unrealized Gain 412 715
Unrealized Losses (10,070) (37,102)
Fair Value 236,158 735,437
ECL $ 312 $ 915