v3.26.1
CONCESSION ARRANGEMENTS RIGHTS - Intangible assets in concession arrangements - Tabular disclosure (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance $ 2,758,318 $ 2,382,427 $ 2,040,158
Additions 681,732 654,850 682,696
Amortization of the year (361,925) (277,288) (262,880)
Effect of movements in exchange rates (23,025) 20,104 (35,407)
Ending Balance 2,954,167 2,758,318 2,382,427
Service concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance 14,314,560 13,557,267 13,242,706
Ending Balance 13,495,108 14,314,560 13,557,267
Energy and Gas concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance 6,374,508 5,524,828 5,891,841
Ending Balance 5,578,118 6,374,508 5,524,828
Infrastructure concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance 7,940,052 8,032,439 7,350,865
Ending Balance 7,916,990 7,940,052 8,032,439
Cost | Service concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance 16,507,747 15,348,044 14,760,176
Additions 726,404 742,131 1,302,943
Transfers to Other Intangible Assets (31,347)    
Transfers to / from PPE (722,070) 244 4,270
Transfers to / from other accounts receivable for concession contracts (576,407)    
Transfer to non-current assets held for sale   (33,400)  
Withdrawals (9,760) (21,794) (6,489)
Effect of movements in exchange rates (571,471) 472,522 (712,856)
Cost / (Amortization) / (Impairment loss) (1,184,651) 1,159,703 587,868
Ending Balance 15,323,096 16,507,747 15,348,044
Cost | Energy and Gas concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance 8,267,168 7,108,173 7,238,835
Additions 726,404 741,423 588,454
Transfers to Other Intangible Assets (31,347)    
Transfers to / from PPE (722,070) 244 229
Transfers to / from other accounts receivable for concession contracts (639,347)    
Transfer to non-current assets held for sale   (33,400)  
Withdrawals (9,760) (21,794) (6,489)
Effect of movements in exchange rates (571,471) 472,522 (712,856)
Cost / (Amortization) / (Impairment loss) (1,247,591) 1,158,995 (130,662)
Ending Balance 7,019,577 8,267,168 7,108,173
Cost | Infrastructure concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance 8,240,579 8,239,871 7,521,341
Additions   708 714,489
Transfers to / from PPE     4,041
Transfers to / from other accounts receivable for concession contracts 62,940    
Cost / (Amortization) / (Impairment loss) 62,940 708 718,530
Ending Balance 8,303,519 8,240,579 8,239,871
Accumulated depreciation and amortisation [member] | Service concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance (2,184,502) (1,782,966) (1,505,046)
Transfers to Other Intangible Assets 3,609    
Transfers to / from PPE 551,313 18 (2,184)
Transfers to / from other accounts receivable for concession contracts 160,830    
Amortization of the year (405,925) (397,046) (317,087)
Transfer to non-current assets held for sale   26,426  
Withdrawals 3,136 6,997 289
Effect of movements in exchange rates 44,576 (37,931) 41,062
Cost / (Amortization) / (Impairment loss) 357,539 (401,536) (277,920)
Ending Balance (1,826,963) (2,184,502) (1,782,966)
Accumulated depreciation and amortisation [member] | Energy and Gas concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance (1,883,975) (1,575,534) (1,339,183)
Transfers to Other Intangible Assets 3,609    
Transfers to / from PPE 551,313 18  
Transfers to / from other accounts receivable for concession contracts 160,830    
Amortization of the year (319,923) (303,951) (277,702)
Transfer to non-current assets held for sale   26,426  
Withdrawals 3,136 6,997 289
Effect of movements in exchange rates 44,576 (37,931) 41,062
Cost / (Amortization) / (Impairment loss) 443,541 (308,441) (236,351)
Ending Balance (1,440,434) (1,883,975) (1,575,534)
Accumulated depreciation and amortisation [member] | Infrastructure concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance (300,527) (207,432) (165,863)
Transfers to / from PPE     (2,184)
Amortization of the year (86,002) (93,095) (39,385)
Cost / (Amortization) / (Impairment loss) (86,002) (93,095) (41,569)
Ending Balance (386,529) (300,527) (207,432)
Accumulated impairment [member] | Service concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance (8,685) (7,811) (12,424)
Transfers to / from PPE 2,535    
Withdrawals 5,125    
Impairment charge   (874) 4,613
Cost / (Amortization) / (Impairment loss) 7,660 (874) 4,613
Ending Balance (1,025) (8,685) (7,811)
Accumulated impairment [member] | Energy and Gas concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance (8,685) (7,811) (7,811)
Transfers to / from PPE 2,535    
Withdrawals 5,125    
Impairment charge   (874)  
Cost / (Amortization) / (Impairment loss) 7,660 (874)  
Ending Balance $ (1,025) $ (8,685) (7,811)
Accumulated impairment [member] | Infrastructure concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Beginning Balance     (4,613)
Impairment charge     4,613
Cost / (Amortization) / (Impairment loss)     $ 4,613