v3.26.1
RISK MANAGEMENT - Loans individually evaluated for impairment (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
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
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees 302,439 1,616,823
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Without recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees   262,373
Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees 302,439 1,354,450
Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees 300,598 1,610,521
Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Without recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees   262,373
Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees 300,598 1,348,148
Loans to consumers [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees 1,841 4,332
Loans to consumers [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees 1,841 4,332
Mortgages [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees   1,970
Mortgages [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets, loans, collateral guarantees   1,970
Gross carrying amount [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 6,115,135 8,064,989
Gross carrying amount [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Without recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 68 262,667
Gross carrying amount [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 6,115,067 7,802,322
Gross carrying amount [member] | Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 6,090,583 8,038,649
Gross carrying amount [member] | Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Without recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 68 262,667
Gross carrying amount [member] | Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 6,090,515 7,775,982
Gross carrying amount [member] | Loans to consumers [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 13,117 6,512
Gross carrying amount [member] | Loans to consumers [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 13,117 6,512
Gross carrying amount [member] | Mortgages [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 11,435 19,828
Gross carrying amount [member] | Mortgages [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets 11,435 19,828
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] | Financial instruments credit-impaired [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 (5,677,451) (7,018,695)
Accumulated impairment [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2,108,362) (2,965,432)
Accumulated impairment [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2,108,362) (2,965,432)
Accumulated impairment [member] | Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2,100,718) (2,950,023)
Accumulated impairment [member] | Commercial lending portfolio [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2,100,718) (2,950,023)
Accumulated impairment [member] | Loans to consumers [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (4,755) (3,868)
Accumulated impairment [member] | Loans to consumers [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (4,755) (3,868)
Accumulated impairment [member] | Mortgages [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets (2,889) (11,541)
Accumulated impairment [member] | Mortgages [member] | Financial instruments credit-impaired [member] | Lifetime expected credit losses [member] | With recognized provision | Expected credit losses individually assessed [member]    
Disclosure of reconciliation of changes in loss allowance and explanation of changes in gross carrying amount for financial instruments [line items]    
Financial assets $ (2,889) $ (11,541)