v3.26.1
RISK MANAGEMENT - Credit risk model scenarios - Loss allowance (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of financial assets [line items]        
Financial assets $ (305,457,293) $ (304,853,883)    
Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 8,935,367 10,478,009    
Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (243,432,271) (251,981,889)    
Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 8,830,940 10,387,285    
Loan portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (184,225,973) (190,129,486)    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 8,429,970 10,006,639    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 8,429,970 10,006,639 $ 10,035,715 $ 9,197,514
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario A        
Disclosure of financial assets [line items]        
Financial assets 8,346,843 9,902,575    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario B        
Disclosure of financial assets [line items]        
Financial assets 8,402,952 9,983,548    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario C        
Disclosure of financial assets [line items]        
Financial assets 8,522,881 10,157,126    
Loans to corporate entities [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (105,824,421) (110,756,010)    
Loans to corporate entities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 4,262,079 5,363,688    
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (104,047,053) (110,051,750)    
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 4,261,931 5,362,893 5,294,600 5,492,746
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario A        
Disclosure of financial assets [line items]        
Financial assets 4,218,378 5,309,528    
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario B        
Disclosure of financial assets [line items]        
Financial assets 4,241,331 5,336,949    
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario C        
Disclosure of financial assets [line items]        
Financial assets 4,286,802 5,430,691    
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (1,777,368) (704,260)    
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 148 795 22 1,444
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario A        
Disclosure of financial assets [line items]        
Financial assets 8,030 2,505    
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario B        
Disclosure of financial assets [line items]        
Financial assets 8,293 2,619    
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario C        
Disclosure of financial assets [line items]        
Financial assets 8,854 3,029    
Loans to consumers [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (56,791,437) (57,810,307)    
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 3,664,776 4,166,018 4,307,446 3,311,912
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario A        
Disclosure of financial assets [line items]        
Financial assets 3,619,488 4,118,656    
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario B        
Disclosure of financial assets [line items]        
Financial assets 3,651,503 4,168,736    
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario C        
Disclosure of financial assets [line items]        
Financial assets 3,720,068 4,239,720    
Mortgages [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (21,609,555) (21,562,412)    
Mortgages [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 502,155 473,315 379,987 352,441
Mortgages [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario A        
Disclosure of financial assets [line items]        
Financial assets 499,989 468,275    
Mortgages [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario B        
Disclosure of financial assets [line items]        
Financial assets 500,866 471,634    
Mortgages [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario C        
Disclosure of financial assets [line items]        
Financial assets 506,196 480,073    
Microcredit [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (560) (757)    
Microcredit [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets 960 3,618 $ 53,660 $ 38,971
Microcredit [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario A        
Disclosure of financial assets [line items]        
Financial assets 958 3,611    
Microcredit [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario B        
Disclosure of financial assets [line items]        
Financial assets 959 3,610    
Microcredit [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Scenario C        
Disclosure of financial assets [line items]        
Financial assets $ 961 $ 3,613