v3.26.1
RISK MANAGEMENT - Structural interest rate risk - Financial 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
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
Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 12,203,439 32,921,500
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 assets 97,304,302 74,660,209
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 assets 10,982,425 16,016,876
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
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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,275,910 15,313,556
Commercial lending portfolio [member] | Financial assets 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 assets 88,802,542 66,132,059
Commercial lending portfolio [member] | Financial assets 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 assets 2,343,572 6,400,419
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
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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,767,275 704,516
Interbank and overnight funds [member] | Financial assets 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 assets 10,241 539
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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 231,208 4,821,574
Loans to consumers [member] | Financial assets 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 assets 2,875,339 3,357,049
Loans to consumers [member] | Financial assets 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 assets 1,510,240 2,743,970
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
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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 278,631 3,837,007
Mortgages [member] | Financial assets 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 assets 286,563 184,710
Mortgages [member] | Financial assets 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 assets 11,248 123,247
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
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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 891 2,199
Microcredit [member] | Financial assets 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 assets 24 457
Microcredit [member] | Financial assets 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 assets   295
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
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] | 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
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 24,683 14,665
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 787 6,589
Other accounts receivable at amortized cost [member] | Financial assets 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 assets 182 189
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
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
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] | 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
IFRS Cash and Cash Equivalents [Member] | Financial assets 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 assets 6,947,229 6,669,978
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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 941,587 1,120,442
Debt securities [member] | Investment securities [member] | Financial assets 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 assets 2,523,556 3,339,892
Debt securities [member] | Investment securities [member] | Financial assets 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 assets 3,776,864 3,707,096
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 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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 313,342 64,537
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 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 assets 857,713 143,911
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 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 assets 917,811 313,373
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] | 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] | 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 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] | Not later than one month [member] | Interest rate risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 422,683 373,026
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets 1,947,537 1,495,003
Debt securities [member] | Investment securities at fair value [member] | Financial assets measured at fair value through other comprehensive income, 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 assets 2,422,508 2,726,862
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