v3.26.1
NON-CONTROLLING INTEREST - Financial information (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of noncontrolling interest [line items]      
Non-controlling Interest share of equity $ 16,296,936 $ 15,711,661  
Non-controlling interest share of net income 1,493,300 1,176,390 $ 1,438,113
Dividends paid to non-controlling interest $ (662,266) $ (667,330) $ (915,933)
Corporacion Financiera Colombiana S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 59.47% 59.47%  
Non-controlling Interest share of equity $ 10,953,814 $ 10,522,067  
Non-controlling interest share of net income 979,300 776,960  
Dividends paid to non-controlling interest $ (491,683) $ (495,436)  
Banco de Bogota S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 31.07% 31.07%  
Non-controlling Interest share of equity $ 2,532,890 $ 2,560,159  
Non-controlling interest share of net income 246,907 230,718  
Dividends paid to non-controlling interest $ (135,915) $ (142,352)  
Banco de Occidente S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 27.73% 27.73%  
Non-controlling Interest share of equity $ 1,317,614 $ 1,307,098  
Non-controlling interest share of net income 97,696 72,105  
Dividends paid to non-controlling interest $ (34,463) $ (28,379)  
Sociedad Administradora de Fondos de Pensiones, Cesantias y del CCAI Porvenir S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 24.24% 24.24%  
Non-controlling Interest share of equity $ 1,007,901 $ 843,566  
Non-controlling interest share of net income 167,091 155,710  
Dividends paid to non-controlling interest $ (3) $ (2)  
Banco Comercial AV Villas S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 20.13% 20.13%  
Non-controlling Interest share of equity $ 318,202 $ 311,730  
Non-controlling interest share of net income 3,903 (26,171)  
Dividends paid to non-controlling interest $ (45) $ (135)  
Banco Popular S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 6.13% 6.26%  
Non-controlling Interest share of equity $ 153,628 $ 158,425  
Non-controlling interest share of net income (4,840) (32,932)  
Dividends paid to non-controlling interest $ (157) $ (1,026)  
Aval Casa de Bolsa S.A      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 13.60% 13.60%  
Non-controlling Interest share of equity $ 9,448 $ 6,757  
Non-controlling interest share of net income $ 1,324    
Aval Fiduciaria S.A.      
Disclosure of noncontrolling interest [line items]      
Country Colombia Colombia  
Non-controlling Interest 1.53% 3.27%  
Non-controlling Interest share of equity $ 1,770 $ 1,859  
Non-controlling interest share of net income $ 250    
Aval Banca de Inversion S.A.S.      
Disclosure of noncontrolling interest [line items]      
Country Colombia    
Non-controlling Interest 17.84%    
Non-controlling Interest share of equity $ 1,669    
Non-controlling interest share of net income $ 1,669