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Other financial assets - Additional Information (Details)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Colombian pesos
Other financial assets
Average rate of return on investments	10.20%	12.90%
US Dollar
Other financial assets
Average rate of return on investments	4.80%	7.70%

X

- Definition

The percentage of average return earned on investments during the period.

+ References

No definition available.

+ Details

Name:	ec_AverageRateOfReturnOnInvestments
Namespace Prefix:	ec_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line item represents the other financial assets.

+ References

No definition available.

+ Details

Name:	ec_DisclosureOfOtherFinancialAssetsLineItems
Namespace Prefix:	ec_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	srt_CurrencyAxis=ec_ColombianPesosMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	srt_CurrencyAxis=ec_UsDollarMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: