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CONCESSION ARRANGEMENTS RIGHTS - General information (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets $ 280,746,878 $ 274,682,875    
Intangible assets 2,382,427 2,040,158 $ 1,886,042 $ 1,623,670
Assets 301,181,596 295,591,236    
Impairment loss 4,182,394 2,493,148 2,721,083  
Service concession arrangement [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 17,812,820 16,153,016 13,081,532 9,727,508
Intangible assets 13,557,267 13,242,706 11,098,116 $ 9,187,564
Assets 31,370,087 29,395,722    
Impairment loss 223 1,220 3,050  
Financial assets at fair value through profit or loss, category [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 19,332,588 15,370,870    
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 3,830,916 3,507,231    
Financial assets at amortised cost, category [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets 236,970,165 235,373,468    
Impairment loss 4,802,074 3,179,476 $ 4,551,160  
Financial assets at amortised cost, category [member] | Service concession arrangement [member]        
Disclosure of detailed information about service concession arrangements [line items]        
Financial assets $ 13,981,904 $ 12,645,785