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Taxes - Income tax expense (Details) - COP ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Taxes      
Current income tax $ 12,807,005 $ 16,791,619 $ 6,975,549
Deferred income tax (3,310,147) 2,813,817 1,939,567
Deferred income tax - rate change 1,941,995 (658,919) (28,993)
Adjustments to prior years' current and deferred tax 77,022 17,421 (90,860)
Income tax expenses 11,515,875 18,963,938 $ 8,795,263
Growth of revenue (3,984,614) (3,984,614)  
Exchange rate effect in deferred income tax variation $ (6,123,964) (6,123,964)  
Percentage of increase Decrease in Exchange Rate 20.50%    
Adjustments in surcharge rates $ 2,600,914 2,600,914  
Adjustment to income tax provision $ 59,600 $ 59,600