v3.26.1
RISK MANAGEMENT - Credit risk model - Loss allowance (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets $ (305,457,293) $ (304,853,883)    
Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 8,935,367 10,478,009    
Accumulated impairment [member] | Loan commitments and financial guarantee contracts [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 77,825 72,414 $ 70,268 $ 64,910
Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 2,002,599 2,017,308    
Accumulated impairment [member] | 12-month expected credit losses [member] | Loan commitments and financial guarantee contracts [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 69,308 62,509 61,637 58,160
Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,021,503 1,250,965    
Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member] | Loan commitments and financial guarantee contracts [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 6,906 7,671 7,682 6,461
Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 5,677,451 7,018,695    
Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member] | Loan commitments and financial guarantee contracts [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,611 2,234 949 289
Other accounts receivable, general approach | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 158,878 170,930 186,282 185,301
Other accounts receivable, general approach | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 31,161 31,226 25,965 24,977
Other accounts receivable, general approach | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 25,223 22,196 19,188 20,201
Other accounts receivable, general approach | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 102,494 117,508 141,129 140,123
Other accounts receivable, simplified approach | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 233,814 191,041    
Other accounts receivable, simplified approach | Accumulated impairment [member] | Lifetime expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 233,814 191,041 199,382 197,115
Investment securities at fair value [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (30,055,436) (28,472,926)    
Financial assets at amortised cost, category [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (243,432,271) (251,981,889)    
Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 8,830,940 10,387,285    
Financial assets at amortised cost, category [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,906,733 1,936,489    
Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,014,553 1,243,294    
Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 5,675,840 7,016,461    
Financial assets at amortised cost, category [member] | Loan portfolio [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (184,225,973) (190,129,486)    
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated depreciation, amortisation and impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 8,429,970 10,006,639    
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 8,429,970 10,006,639 10,035,715 9,197,514
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,867,294 1,890,934 1,811,608 1,494,887
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 989,330 1,216,752 1,284,791 1,425,922
Financial assets at amortised cost, category [member] | Loan portfolio [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 5,573,346 6,898,953 6,939,316 6,276,705
Financial assets at amortised cost, category [member] | Loans to corporate entities [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (105,824,421) (110,756,010)    
Financial assets at amortised cost, category [member] | Loans to corporate entities [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 4,262,079 5,363,688    
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (104,047,053) (110,051,750)    
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 4,261,931 5,362,893 5,294,600 5,492,746
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 683,890 724,075 612,441 598,538
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 220,828 217,588 218,824 515,202
Financial assets at amortised cost, category [member] | Commercial lending portfolio [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 3,357,213 4,421,230 4,463,335 4,379,006
Financial assets at amortised cost, category [member] | Interbank and overnight funds [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (1,777,368) (704,260)    
Financial assets at amortised cost, category [member] | Interbank and overnight funds [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 148 795 22 1,444
Financial assets at amortised cost, category [member] | Interbank and overnight funds [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 148 794 22 1,444
Financial assets at amortised cost, category [member] | Interbank and overnight funds [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets   1    
Financial assets at amortised cost, category [member] | Loans to consumers [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (56,791,437) (57,810,307)    
Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 3,664,776 4,166,018 4,307,446 3,311,912
Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,104,503 1,105,918 1,141,997 839,904
Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 703,634 927,310 993,268 853,159
Financial assets at amortised cost, category [member] | Loans to consumers [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 1,856,639 2,132,790 2,172,181 1,618,849
Financial assets at amortised cost, category [member] | Mortgages [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (21,609,555) (21,562,412)    
Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 502,155 473,315 379,987 352,441
Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 78,738 60,088 45,080 48,763
Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 64,868 71,839 66,333 52,639
Financial assets at amortised cost, category [member] | Mortgages [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 358,549 341,388 268,574 251,039
Financial assets at amortised cost, category [member] | Microcredit [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (560) (757)    
Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 960 3,618 53,660 38,971
Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 15 59 12,068 6,238
Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets   14 6,366 4,922
Financial assets at amortised cost, category [member] | Microcredit [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 945 3,545 35,226 27,811
Financial assets at amortised cost, category [member] | Other accounts receivable at amortized cost [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 392,692 361,971    
Financial assets at amortised cost, category [member] | Other accounts receivable, general approach | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 31,161 31,226    
Financial assets at amortised cost, category [member] | Other accounts receivable, general approach | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 25,223 22,196    
Financial assets at amortised cost, category [member] | Other accounts receivable, general approach | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 102,494 117,508    
Financial assets at amortised cost, category [member] | Other accounts receivable, simplified approach | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 233,814 191,041    
Financial assets measured at fair value through other comprehensive income, category [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (28,455,957) (27,050,198)    
Debt securities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 8,278 18,675 16,882 36,930
Debt securities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 8,278 14,329 12,613 28,563
Debt securities [member] | Financial assets at amortised cost, category [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets   4,346 4,269 8,367
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (28,455,957) (27,050,198)    
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets (28,455,957) (27,050,198)    
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | Accumulated impairment [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 26,602 18,310 12,972 12,686
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | Accumulated impairment [member] | 12-month expected credit losses [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets 26,558 $ 18,310 $ 12,972 $ 12,686
Debt securities [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Investment securities at fair value [member] | Accumulated impairment [member] | Lifetime expected credit losses [member] | Financial instruments not credit-impaired [member]        
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]        
Financial assets $ 44