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Taxes - Income tax expense (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Taxes.      
Current income tax $ 8,972,186 $ 12,807,005 $ 16,791,619
Deferred income tax 1,748,039 (3,310,147) 2,813,817
Deferred income tax - rate change 1,510,121 1,941,995 (658,919)
Adjustments to prior years' current and deferred tax (21,806) 77,022 17,421
Income tax expenses 12,208,540 11,515,875 $ 18,963,938
Growth of revenue (3,834,819) (3,834,819)  
Exchange rate effect in deferred income tax variation 5,058,186 5,058,186  
Adjustments in surcharge rates (21,806)    
Adjustment to income tax provision $ (3,609) $ (18,197)