v3.26.1
CONCESSION ARRANGEMENTS RIGHTS - Financial 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]      
Financial assets at beginning of period $ 304,853,883    
Adjustment to fair value 623,163 $ 350,919 $ 323,685
Financial assets at end of period 305,457,293 304,853,883  
Financial assets at fair value through profit or loss, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 24,400,493    
Financial assets at end of period 31,969,586 24,400,493  
Financial assets at amortised cost, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 251,981,889    
Financial assets at end of period 243,432,271 251,981,889  
Service concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 19,260,241 17,812,820 16,153,016
Additions or new concession arrangements 563,061 1,177,274 995,993
Net effect from concession termination (2,169,561)    
Collections during the year (2,103,193) (971,634) (1,144,396)
Adjustment to fair value 623,163 350,919 323,685
Accrued interest 879,130 861,175 1,493,115
Year impairment charge 648 (709) (223)
Effect of movements in exchange rates 13,213 30,396 (8,370)
Financial assets at end of period 17,066,702 19,260,241 17,812,820
Service concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 4,181,835    
Financial assets at end of period 2,635,437 4,181,835  
Service concession arrangement [member] | Financial assets at amortised cost, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 15,078,406    
Financial assets at end of period 14,431,265 15,078,406  
Energy and Gas concession arrangement [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 4,329,135 3,945,479 3,512,055
Additions or new concession arrangements 19,451 76,572 118,109
Net effect from concession termination (2,169,561)    
Collections during the year (155,978) (74,231)  
Adjustment to fair value 623,163 350,919 323,685
Effect of movements in exchange rates 13,213 30,396 (8,370)
Financial assets at end of period 2,659,423 4,329,135 3,945,479
Energy and Gas concession arrangement [member] | Financial assets at fair value through profit or loss, mandatorily measured at fair value, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 4,181,835 3,830,916 3,507,231
Net effect from concession termination (2,169,561)    
Adjustment to fair value 623,163 350,919 323,685
Financial assets at end of period 2,635,437 4,181,835 3,830,916
Energy and Gas concession arrangement [member] | Financial assets at amortised cost, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 147,300 114,563 4,824
Additions or new concession arrangements 19,451 76,572 118,109
Collections during the year (155,978) (74,231)  
Effect of movements in exchange rates 13,213 30,396 (8,370)
Financial assets at end of period 23,986 147,300 114,563
Infrastructure concession arrangement [member] | Financial assets at amortised cost, category [member]      
Disclosure of detailed information about service concession arrangements [line items]      
Financial assets at beginning of period 14,931,106 13,867,341 12,640,961
Additions or new concession arrangements 543,610 1,100,702 877,884
Collections during the year (1,947,215) (897,403) (1,144,396)
Accrued interest 879,130 861,175 1,493,115
Year impairment charge 648 (709) (223)
Financial assets at end of period $ 14,407,279 $ 14,931,106 $ 13,867,341