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Related parties - Additional Information (Details) - COP ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Transactions between related parties
Remuneration fees to board of directors	$ 6,139	$ 4,983
Payment of key management personnel compensation	$ 23,186	$ 35,906
Ownership interest held by government	88.49%
Key directors of management
Transactions between related parties
Ownership Interest Held By Related Party	1.00%

X

- Definition

The amount of fees to board members cancelled during the period.

+ References

No definition available.

+ Details

Name:	ec_CancellationOfFees
Namespace Prefix:	ec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The percentage of entity ownership interest held by government.

+ References

No definition available.

+ Details

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

X

- Definition

The percentage of entity ownership interest held by related party.

+ References

No definition available.

+ Details

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

X

- Definition

The cash outflow for payment of key management personnel compensation.

+ References

No definition available.

+ Details

Name:	ec_PaymentOfKeyManagementPersonnelCompensation
Namespace Prefix:	ec_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=ifrs-full_KeyManagementPersonnelOfEntityOrParentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: