v3.26.1
CUSTOMER DEPOSITS - Concentration of deposits received (Details) - COP ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of customer deposits [line items]    
Customer deposits $ 207,405,238 $ 200,872,177
Concentrations of deposits, percentage 100.00% 100.00%
Financial [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 42,261,563 $ 36,117,236
Concentrations of deposits, percentage 20.40% 18.00%
Government and Colombian Government entities [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 30,256,676 $ 26,875,424
Concentrations of deposits, percentage 14.60% 13.40%
Individuals [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 29,269,112 $ 31,559,768
Concentrations of deposits, percentage 14.10% 15.70%
Financial and insurance activities [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 23,078,620 $ 19,700,240
Concentrations of deposits, percentage 11.10% 9.80%
Services [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 14,665,982 $ 19,280,845
Concentrations of deposits, percentage 7.10% 9.60%
Insurance [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 13,112,460 $ 14,226,539
Concentrations of deposits, percentage 6.30% 7.10%
Commerce [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 11,865,618 $ 12,680,110
Concentrations of deposits, percentage 5.70% 6.30%
Real estates [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 4,676,630 $ 3,418,132
Concentrations of deposits, percentage 2.30% 1.70%
Manufacturing [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 4,022,403 $ 3,056,218
Concentrations of deposits, percentage 1.90% 1.50%
Transport [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 2,421,100 $ 287,384
Concentrations of deposits, percentage 1.20% 0.10%
Agriculture and livestock [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 2,250,173 $ 1,556,711
Concentrations of deposits, percentage 1.10% 0.80%
Education [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 1,927,121 $ 1,793,395
Concentrations of deposits, percentage 0.90% 0.90%
Colombian municipalities [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 610,621 $ 604,265
Concentrations of deposits, percentage 0.30% 0.30%
Artistic, entertainment and recreation activities [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 424,886 $ 454,909
Concentrations of deposits, percentage 0.20% 0.20%
Exploitation of mines and quarries [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 418,288 $ 1,226,516
Concentrations of deposits, percentage 0.20% 0.60%
Foreign governments [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 270,985 $ 867,311
Concentrations of deposits, percentage 0.10% 0.40%
Telecommunications [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 130,018 $ 217,656
Concentrations of deposits, percentage 0.10% 0.10%
Tourism [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 1 $ 83,289
Concentrations of deposits, percentage 0.00% 0.10%
Other [member]    
Disclosure of customer deposits [line items]    
Customer deposits $ 25,742,981 $ 26,866,229
Concentrations of deposits, percentage 12.40% 13.40%