v3.26.1
RISK MANAGEMENT - Loans recorded at amortized cost (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    
Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 243,432,271 251,981,889    
Loan portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 184,225,973 190,129,486    
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    
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    
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    
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    
Mortgages [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 21,609,555 21,562,412    
Microcredit [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 560 757    
Gross carrying amount [member] | Loan portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 192,655,943 200,136,125 $ 186,203,770 $ 188,313,361
Gross carrying amount [member] | Loans to corporate entities [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 110,086,500 116,119,698    
Gross carrying amount [member] | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 108,308,984 115,414,643 107,047,817 104,775,099
Gross carrying amount [member] | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 1,777,516 705,055 392,607 5,967,743
Gross carrying amount [member] | Loans to consumers [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 60,456,213 61,976,325 59,999,611 59,419,444
Gross carrying amount [member] | Mortgages [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 22,111,710 22,035,727 18,486,206 17,883,355
Gross carrying amount [member] | Microcredit [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets 1,520 4,375 277,529 267,720
Accumulated depreciation, amortisation and impairment [member] | Loan portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (8,429,970) (10,006,639)    
Accumulated impairment [member]        
Disclosure of financial assets [line items]        
Financial assets (8,935,367) (10,478,009)    
Accumulated impairment [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (8,830,940) (10,387,285)    
Accumulated impairment [member] | Loan portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (8,429,970) (10,006,639) (10,035,715) (9,197,514)
Accumulated impairment [member] | Loans to corporate entities [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (4,262,079) (5,363,688)    
Accumulated impairment [member] | Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (4,261,931) (5,362,893) (5,294,600) (5,492,746)
Accumulated impairment [member] | Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (148) (795) (22) (1,444)
Accumulated impairment [member] | Loans to consumers [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (3,664,776) (4,166,018) (4,307,446) (3,311,912)
Accumulated impairment [member] | Mortgages [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets (502,155) (473,315) (379,987) (352,441)
Accumulated impairment [member] | Microcredit [member] | Financial assets at amortised cost, category [member]        
Disclosure of financial assets [line items]        
Financial assets $ (960) $ (3,618) $ (53,660) $ (38,971)