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CONCESSION ARRANGEMENTS RIGHTS - General information (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets $ 304,853,883 $ 280,746,878    
Intangible assets 2,758,318 2,382,427 $ 2,040,158 $ 1,886,042
Assets 327,859,383 301,181,596    
Impairment loss 4,185,037 4,182,394 2,493,148  
Service concession arrangement [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 19,260,241 17,812,820 16,153,016 13,081,532
Intangible assets 14,314,560 13,557,267 13,242,706 $ 11,098,116
Assets 33,574,801 31,370,087    
Impairment loss 709 223 1,220  
Financial assets at fair value through profit or loss, category [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 24,400,493 19,332,588    
Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member] | Service concession arrangement [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 4,181,835 3,830,916    
Financial assets at amortised cost, category [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 251,981,889 236,970,165    
Impairment loss 4,826,291 4,802,074 $ 3,179,476  
Financial assets at amortised cost, category [member] | Service concession arrangement [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets $ 15,078,406 $ 13,981,904