v3.26.1
RISK MANAGEMENT - Structural interest rate risk - Interest bearing 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
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
Floating interest rate [member] | 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 47,507,532 30,904,081
Floating interest rate [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 14,898,194 19,767,784
Fixed interest rate [member] | 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 169,204,465 168,663,377
Fixed interest rate [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 26,833,080 35,619,091
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
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] | Floating interest rate [member] | 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 392,631 642,651
Checking accounts [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 5,991,973 5,421,425
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
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] | 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
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Floating interest rate [member] | 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 23,127,676 11,243,745
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Floating interest rate [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 5,740,557 4,210,357
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 54,048,625 67,994,677
Time deposits [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [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 12,189,059 12,881,048
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] | Floating interest rate [member] | 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 11,243,338 9,509,067
Saving deposits [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 76,995,203 70,105,837
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] | Floating interest rate [member] | 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 13,082 11,728
Other deposits [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 29,541 110,023
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
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] | Floating interest rate [member] | 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 255,945 336,770
Interbank and overnight funds [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 22,399,480 18,172,999
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] | 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
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Floating interest rate [member] | 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 10,323,838 8,349,490
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Floating interest rate [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 3,518,694 8,188,874
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 5,459,051 5,952,723
Borrowing from banks and other [member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [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 5,257,592 5,607,072
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] | 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
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Floating interest rate [member] | 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 2,151,022 810,630
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Floating interest rate [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 5,638,943 7,368,553
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [member] | 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 4,280,592 905,693
IFRS Long-term Debt [Member] | Financial liabilities at amortised cost, category [member] | Fixed interest rate [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 $ 9,386,429 $ 17,130,971