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Intangible assets (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Intangible assets    
Beginning balance $ 14,714,809  
Ending balance 16,413,285 $ 14,714,809
Licenses and software    
Intangible assets    
Beginning balance 698,038 628,454
Ending balance 940,883 698,038
Other intangibles    
Intangible assets    
Beginning balance 713,928 836,081
Ending balance 1,031,400 713,928
Concessions and rights    
Intangible assets    
Beginning balance 11,878,160 15,174,024
Ending balance 12,927,008 11,878,160
Easements    
Intangible assets    
Beginning balance 1,424,683 1,508,046
Ending balance 1,513,994 1,424,683
Intangible assets    
Intangible assets    
Beginning balance 14,714,809 18,146,605
Ending balance 16,413,285 14,714,809
Cost | Licenses and software    
Intangible assets    
Beginning balance 1,659,452 1,512,614
Additions 529,722 235,031
Disposals (152,677) (23,443)
Foreign currency translation 38,644 (95,373)
Transfers 50,370 30,623
Ending balance 2,125,511 1,659,452
Cost | Other intangibles    
Intangible assets    
Beginning balance 969,856 1,282,752
Additions 0 8,270
Disposals 0 (62)
Foreign currency translation (96,488) (312,512)
Transfers 336,282 (8,592)
Ending balance 1,209,650 969,856
Cost | Concessions and rights    
Intangible assets    
Beginning balance 13,659,149 17,568,081
Additions 322,263 515,975
Disposals (14,781) 0
Foreign currency translation 2,054,908 (4,295,705)
Transfers 3,796 (129,202)
Ending balance 16,025,335 13,659,149
Cost | Easements    
Intangible assets    
Beginning balance 1,556,960 1,637,444
Additions 13,723 17,320
Disposals (2,941) (755)
Foreign currency translation 68,581 (113,875)
Transfers 25,858 16,826
Ending balance 1,662,181 1,556,960
Cost | Intangible assets    
Intangible assets    
Beginning balance 17,845,417 22,000,891
Additions 865,708 776,596
Disposals (170,399) (24,260)
Foreign currency translation 2,065,645 (4,817,465)
Transfers 416,306 (90,345)
Ending balance 21,022,677 17,845,417
Accumulated amortization | Licenses and software    
Intangible assets    
Beginning balance (961,414) (884,160)
Amortization expenses (263,172) (165,635)
Impairment (loss) recovery (2,583) (4,418)
Disposals 69,888 22,687
Foreign currency translation (25,229) 69,810
Transfers (2,118) 302
Ending balance (1,184,628) (961,414)
Accumulated amortization | Other intangibles    
Intangible assets    
Beginning balance (255,928) (446,671)
Amortization expenses (14,870) (25,625)
Impairment (loss) recovery (297) (89)
Disposals 52 62
Foreign currency translation 90,779 216,395
Transfers 2,118 0
Ending balance (178,250) (255,928)
Accumulated amortization | Concessions and rights    
Intangible assets    
Beginning balance (1,780,989) (2,394,057)
Amortization expenses (568,260) (693,587)
Impairment (loss) recovery (42,862) (13,215)
Disposals 6,782 0
Foreign currency translation (712,998) 1,319,870
Transfers 0 0
Ending balance (3,098,327) (1,780,989)
Accumulated amortization | Easements    
Intangible assets    
Beginning balance (132,277) (129,398)
Amortization expenses (6,645) (7,346)
Impairment (loss) recovery 218 (197)
Disposals 600 0
Foreign currency translation (3,320) 5,153
Transfers (6,763) (489)
Ending balance (148,187) (132,277)
Accumulated amortization | Intangible assets    
Intangible assets    
Beginning balance (3,130,608) (3,854,286)
Amortization expenses (852,947) (892,193)
Impairment (loss) recovery (45,524) (17,919)
Disposals 77,218 22,749
Foreign currency translation (650,768) 1,611,228
Transfers (6,763) (187)
Ending balance $ (4,609,392) $ (3,130,608)