v3.26.1
RISK MANAGEMENT - Structural interest rate risk - Financial liabilities (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities $ 278,063,105 $ 274,729,544
Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 276,076,824 273,695,952
Non-interest [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 17,633,553 18,741,619
Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 130,475,915 113,617,646
Later than one month and not later than six months [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 57,698,255 66,987,439
Later than six months and not later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 28,881,183 27,744,809
Later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 41,387,918 46,604,439
Financial liabilities at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 276,076,824 273,695,952
Customer deposits [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 207,405,238 200,872,177
Customer deposits [member] | Financial liabilities at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 207,405,238 200,872,177
Checking accounts [member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 23,598,235 24,579,536
Checking accounts [member] | Financial liabilities at amortised cost, category [member] | Non-interest [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 17,213,631 18,515,460
Checking accounts [member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 6,384,604 6,064,076
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 95,105,917 96,329,827
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 10,784,108 6,739,476
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 45,291,746 50,866,874
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 20,894,887 23,336,940
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 18,135,176 15,386,537
Saving deposits [member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 88,238,541 79,614,904
Saving deposits [member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 88,238,541 79,614,904
Other deposits [member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 462,545 347,910
Other deposits [member] | Financial liabilities at amortised cost, category [member] | Non-interest [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 419,922 226,159
Other deposits [member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 14,699 13,359
Other deposits [member] | Financial liabilities at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 27,924 108,392
Financial obligations [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 68,671,586 72,823,775
Financial obligations [member] | Financial liabilities at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 68,671,586 72,823,775
Interbank and overnight funds [member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 22,655,425 18,509,769
Interbank and overnight funds [member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 22,444,060 17,651,017
Interbank and overnight funds [member] | Financial liabilities at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 208,589 527,638
Interbank and overnight funds [member] | Financial liabilities at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 2,776 331,114
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 24,559,175 28,098,159
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 2,609,903 3,377,387
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 6,823,584 10,628,700
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 6,898,316 3,790,469
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 8,227,372 10,301,603
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 21,456,986 26,215,847
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities   157,427
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Later than one month and not later than six months [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 5,346,412 4,855,835
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Later than six months and not later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities 1,085,204 286,286
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial liabilities $ 15,025,370 $ 20,916,299