v3.26.1
RISK MANAGEMENT - Structural interest rate risk - Interest bearing assets (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets $ 305,457,293 $ 304,853,883
Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 292,106,509 295,152,761
Later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 138,944,746 139,338,308
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 assets 47,595,865 54,702,965
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 assets 56,455,622 62,373,114
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 assets 36,884,143 37,354,237
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 assets 118,499,282 108,506,577
Non-interest [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 32,671,597 32,215,868
Financial assets at fair value through profit or loss, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 31,969,586 24,400,493
Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 243,432,271 251,981,889
Financial assets measured at fair value through other comprehensive income, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 28,455,957 27,050,198
Investment securities [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 39,252,615 39,162,618
Loan portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 184,225,973 190,129,486
Loans to corporate entities [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 105,824,421 110,756,010
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 104,047,053 110,051,750
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 108,308,984 115,414,643
Commercial lending portfolio [member] | Financial assets 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 assets 15,886,960 27,568,609
Commercial lending portfolio [member] | Financial assets 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 assets 38,255,304 47,408,803
Commercial lending portfolio [member] | Financial assets 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 assets 50,293,877 46,834,101
Commercial lending portfolio [member] | Financial assets 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 assets 11,022,924 12,085,311
Commercial lending portfolio [member] | Financial assets 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 assets 8,736,879 9,086,428
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,777,368 704,260
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,777,516 705,055
Interbank and overnight funds [member] | Financial assets 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 assets 1,777,516 705,055
Loans to consumers [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 56,791,437 57,810,307
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 60,456,213 61,976,325
Loans to consumers [member] | Financial assets 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 assets 55,839,426 51,053,732
Loans to consumers [member] | Financial assets 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 assets 683,307 828,680
Loans to consumers [member] | Financial assets 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 assets 1,648,975 5,666,008
Loans to consumers [member] | Financial assets 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 assets 10,523,849 10,058,687
Loans to consumers [member] | Financial assets 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 assets 47,600,082 45,422,950
Mortgages [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 21,609,555 21,562,412
Mortgages [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 22,111,710 22,035,727
Mortgages [member] | Financial assets 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 assets 21,535,268 17,890,763
Mortgages [member] | Financial assets 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 assets 36,143 58,686
Mortgages [member] | Financial assets 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 assets 512,333 4,022,386
Mortgages [member] | Financial assets 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 assets 1,083,682 931,590
Mortgages [member] | Financial assets 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 assets 20,479,552 17,023,065
Microcredit [member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 560 757
Microcredit [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,520 4,375
Microcredit [member] | Financial assets 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 assets 605 1,424
Microcredit [member] | Financial assets 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 assets 802 1,342
Microcredit [member] | Financial assets 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 assets 114 151
Microcredit [member] | Financial assets 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 assets   2,059
Microcredit [member] | Financial assets 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 assets 604 823
Other accounts receivable at amortized cost [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 22,216,161 24,138,538
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 1,926,393 2,230,108
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 25,652 15,598
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 401,057 356,931
Other accounts receivable at amortized cost [member] | Financial assets 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 assets   5,845
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 1,525,336 1,873,177
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 20,264,116 21,886,987
Trading securities [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 29,097,591 20,163,214
Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 29,097,591 20,163,214
Investment securities at fair value [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 30,055,436 28,472,926
Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,635,437 4,181,835
Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, 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 assets 2,635,437 4,181,835
Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, 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 assets 2,635,437 4,181,835
IFRS Cash and Cash Equivalents [Member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 19,354,710 16,998,859
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 19,354,710 16,998,859
IFRS Cash and Cash Equivalents [Member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 19,354,710 16,998,859
IFRS Cash and Cash Equivalents [Member] | Financial assets 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 assets 2,843,399 767,956
IFRS Cash and Cash Equivalents [Member] | Financial assets 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 assets 4,103,830 5,902,022
IFRS Cash and Cash Equivalents [Member] | Financial assets 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 assets 12,407,481 10,328,881
Debt securities [member] | Investment securities [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets   1,425
Debt securities [member] | Investment securities [member] | Financial assets at amortised cost, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 9,205,457 10,708,367
Debt securities [member] | Investment securities [member] | Financial assets 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 assets 1,963,450 2,540,937
Debt securities [member] | Investment securities [member] | Financial assets 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 assets 5,351,209 5,563,208
Debt securities [member] | Investment securities [member] | Financial assets 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 assets   94,850
Debt securities [member] | Investment securities [member] | Financial assets 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 assets 1,890,797 2,604,222
Debt securities [member] | Investment securities [member] | Financial assets 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 assets 1,963,451 2,446,087
Debt securities [member] | Investment securities [member] | Financial assets measured at fair value through other comprehensive income, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 28,455,957 27,050,198
Debt securities [member] | Trading securities [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 17,582,844 11,937,414
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 17,582,844 11,937,414
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 17,582,844 11,937,414
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [member] | Later than one year [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 15,493,978 11,415,593
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [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 assets 169,009 39,959
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [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 assets 131,985 267,185
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [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 assets 1,919,857 481,862
Debt securities [member] | Trading securities [member] | Financial assets at fair value through profit or loss, classified as held for trading, category, International Financial Reporting Standards 9 [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 assets 15,361,993 11,148,408
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets   1,425
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets   1,425
Debt securities [member] | Investment securities at fair value [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, 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 assets   1,425
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 28,455,957 27,050,198
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, category [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 28,455,957 27,050,198
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets 23,663,229 22,455,307
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets 231,040 18,733
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets 831,844 949,667
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets 4,561,688 4,576,159
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets $ 22,831,385 $ 21,505,639