v3.26.1
RISK MANAGEMENT - Liquidity risk - Undiscounted cash flows of 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
Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 370,946,929 361,588,463
Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 40,560,245 39,918,547
Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 47,298,170 45,768,476
Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 37,175,846 35,050,016
Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 245,912,668 240,851,424
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 130,561,629 135,803,537
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 10,257,908 14,582,605
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 30,969,302 31,222,986
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 16,646,031 18,300,276
Commercial lending portfolio [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 72,688,388 71,697,670
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,777,517 705,129
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,773,392 703,330
Interbank and overnight funds [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 4,125 1,799
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 87,527,481 88,028,722
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,034,248 2,374,330
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 8,046,766 8,120,876
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 8,544,496 8,394,853
Loans to consumers [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 68,901,971 69,138,663
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 43,142,926 42,037,568
Mortgages [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 544,230 372,088
Mortgages [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,244,414 1,150,098
Mortgages [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,390,669 1,292,659
Mortgages [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 39,963,613 39,222,723
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,880 4,167
Microcredit [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 226 1,226
Microcredit [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 529 625
Microcredit [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 169 265
Microcredit [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 956 2,051
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
Trade receivables [member] | Financial assets at amortised cost, category [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 24,851,598 28,331,579
Trade receivables [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,014,113 2,864,204
Trade receivables [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 328,378 318,938
Trade receivables [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 19,339 4,548
Trade receivables [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 22,489,768 25,143,889
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] | Liquidity 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] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 19,354,710 16,998,859
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 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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 17,620,682 9,464,293
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,137,023 300,292
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,778,618 305,488
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 3,413,469 435,694
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 10,291,572 8,422,819
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 amortised cost, category [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 10,166,124 9,263,598
Debt securities [member] | Investment securities at fair value [member] | Financial assets at amortised cost, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,246,317 940,289
Debt securities [member] | Investment securities at fair value [member] | Financial assets at amortised cost, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,298,604 2,456,711
Debt securities [member] | Investment securities at fair value [member] | Financial assets at amortised cost, category [member] | Later than six months and not later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 4,657,753 3,203,905
Debt securities [member] | Investment securities at fair value [member] | Financial assets at amortised cost, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,963,450 2,662,693
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 33,123,177 29,847,917
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 452,819 401,816
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 1,799,620 1,811,929
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,192,120 3,252,189
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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 28,678,618 24,381,983
Derivatives [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,453,579 1,023,313
Derivatives [member] | Trading securities [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,217,021 969,294
Derivatives [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 2,217,021 969,294
Derivatives [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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,536,920 1,016,902
Derivatives [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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 742,356 376,454
Derivatives [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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 800,086 325,466
Derivatives [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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 267,223 144,525
Derivatives [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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 727,255 170,457
Derivatives [member] | Hedging instruments [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 236,558 54,019
Derivatives [member] | Hedging instruments [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 236,558 54,019
Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 282,285 86,192
Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Not later than one month [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 2,903 3,054
Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Later than one month and not later than six months [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 27,728 53,560
Derivatives [member] | Hedging instruments [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] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets 44,577 21,102
Derivatives [member] | Hedging instruments [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Later than one year [member] | Liquidity risk [member]    
Disclosure of nature and extent of risks arising from financial instruments [line items]    
Financial assets $ 207,077 $ 8,476