v3.26.1
RISK MANAGEMENT - Concentrations of credit risk - Concentration by sector (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    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member]        
Disclosure of financial assets [line items]        
Financial assets $ 192,655,943 $ 200,136,125 $ 186,203,770 $ 188,313,361
Concentration risk, percentage, financial assets (as a percent) 100.00% 100.00%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Consumer services        
Disclosure of financial assets [line items]        
Financial assets $ 87,550,262 $ 89,687,446    
Concentration risk, percentage, financial assets (as a percent) 45.40% 44.80%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Commercial services        
Disclosure of financial assets [line items]        
Financial assets $ 41,868,516 $ 43,792,710    
Concentration risk, percentage, financial assets (as a percent) 21.70% 21.90%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | IFRS Construction [Member]        
Disclosure of financial assets [line items]        
Financial assets $ 14,015,379 $ 15,046,109    
Concentration risk, percentage, financial assets (as a percent) 7.30% 7.50%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Food, beverage and tobacco        
Disclosure of financial assets [line items]        
Financial assets $ 6,294,320 $ 7,577,678    
Concentration risk, percentage, financial assets (as a percent) 3.30% 3.80%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Other industrial and manufacturing products        
Disclosure of financial assets [line items]        
Financial assets $ 5,316,713 $ 6,857,011    
Concentration risk, percentage, financial assets (as a percent) 2.80% 3.40%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Transportation and communications        
Disclosure of financial assets [line items]        
Financial assets $ 6,579,198 $ 6,499,070    
Concentration risk, percentage, financial assets (as a percent) 3.40% 3.20%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Public services        
Disclosure of financial assets [line items]        
Financial assets $ 10,088,667 $ 9,218,309    
Concentration risk, percentage, financial assets (as a percent) 5.20% 4.60%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Chemical production        
Disclosure of financial assets [line items]        
Financial assets $ 4,890,011 $ 5,539,036    
Concentration risk, percentage, financial assets (as a percent) 2.50% 2.80%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Government        
Disclosure of financial assets [line items]        
Financial assets $ 7,392,815 $ 5,471,013    
Concentration risk, percentage, financial assets (as a percent) 3.80% 2.70%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Agricultural        
Disclosure of financial assets [line items]        
Financial assets $ 3,266,907 $ 4,538,856    
Concentration risk, percentage, financial assets (as a percent) 1.70% 2.30%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Trade and tourism        
Disclosure of financial assets [line items]        
Financial assets $ 1,495,870 $ 1,724,337    
Concentration risk, percentage, financial assets (as a percent) 0.80% 0.90%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Mining products and oil        
Disclosure of financial assets [line items]        
Financial assets $ 2,415,758 $ 2,754,170    
Concentration risk, percentage, financial assets (as a percent) 1.30% 1.40%    
Loan portfolio [member] | Financial assets at amortised cost, category [member] | Gross carrying amount [member] | Other [member]        
Disclosure of financial assets [line items]        
Financial assets $ 1,481,527 $ 1,430,380    
Concentration risk, percentage, financial assets (as a percent) 0.80% 0.70%