v3.26.1
INVESTMENTS IN ASSOCIATES AND JOINT VENTURES - Voting right percentage (Details) - COP ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of associates [line items]        
Book value $ 1,312,746 $ 1,429,186    
Associates        
Disclosure of associates [line items]        
Book value $ 1,312,746 $ 1,429,186 $ 1,288,641 $ 1,419,296
Gas Natural de Lima y Callao S.A. - Calidda        
Disclosure of associates [line items]        
Ownership interest 40.00% 40.00%    
Book value $ 573,723 $ 699,910    
Gases del Caribe S.A. E.S.P.        
Disclosure of associates [line items]        
Ownership interest 31.00% 31.00%    
Book value $ 357,602 $ 348,946    
Credibanco S.A.        
Disclosure of associates [line items]        
Ownership interest 25.00% 25.00%    
Book value $ 221,955 $ 216,185    
Redeban Multicolor S.A.        
Disclosure of associates [line items]        
Ownership interest 20.00% 20.00%    
Book value $ 44,266 $ 47,967    
A.C.H Colombia S.A.        
Disclosure of associates [line items]        
Ownership interest 34.00% 34.00%    
Book value $ 51,253 $ 39,182    
Aerocali S.A.        
Disclosure of associates [line items]        
Ownership interest 50.00% 50.00%    
Book value $ 28,140 $ 35,507    
ADL Digital Lab S.A.S.        
Disclosure of associates [line items]        
Ownership interest 34.00% 34.00%    
Book value $ 18,970 $ 17,756    
Colombiana de Extrusion S.A. - Extrucol        
Disclosure of associates [line items]        
Ownership interest 30.00% 30.00%    
Book value $ 13,395 $ 14,484    
Metrex S.A.        
Disclosure of associates [line items]        
Ownership interest 18.00% 18.00%    
Book value $ 2,253 $ 2,089    
Energia Eficiente S.A.        
Disclosure of associates [line items]        
Ownership interest 33.00% 33.00%    
Book value $ 1,189 $ 2,249    
Servicios de Identidad Digital S.A.S.        
Disclosure of associates [line items]        
Ownership interest   33.00%    
Book value   $ 4,911