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Amount of contingent asset compliance letter of credit.

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Amount of contingent asset non detailed counterclaim.

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Percentage of number of shares issued for shares of convertible preferred stock that is converted.

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Corresponding to reimbursement of legal fees.

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Amount of claim amount by plaintiff.

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Percentage of forced investments for natural resources.

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Amount awarded to other party in judgment or settlement of litigation.

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The maximum exposure to the credit risk of loans or receivables. [Refer: Loans and receivables; Credit risk [member]; Maximum exposure to credit risk]

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Number of minimum current plans executed for environmental offsetting.

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Minimum percentage of execution of forced obligation for the resources have been invested in protection, conservation and preservation actions through voluntary conservation agreements, purchase of properties intended for conservation, ecological restoration and reforestation and the achievement of the signing of the first agreement with IDEAM.

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Number of former financial vice-presidents.

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Number of former officials.

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Number of former officials being investigated.

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Number of former presidents.

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The total number of legal proceedings, lawsuits, or administrative actions that have been formally initiated and filed by the reporting entity before competent judicial or regulatory authorities during the reporting period.

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No definition available.

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The number of additional legal proceedings that the entity is legally entitled or required to file in future periods but has not yet initiated as of the reporting date.

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No definition available.

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The number of official assessments issued.

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Total number of voluntary conservation agreements implemented as part of environmental protection, conservation, and preservation initiatives.

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The cash inflow from sale of business.

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Number of shares issued as a plan of restructuring during the period.

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Amount of unidentified expenses for specified period.

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Amount of unidentified project cost when entered.

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The amount of interest accrued from VAT assessments.

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The amount of value added tax and penalties arising from VAT assessments.

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Percentage of value added tax rate.

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The amount of value added tax recoverable from credits and refund.

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The probability of success based on opinion of external advisors on VAT assessment contingencies.

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The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Total for all cash-generating units [member]]

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The increase (decrease) in financial assets resulting from changes in models or risk parameters. [Refer: Financial assets]

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Accrued liabilities and provisions - Additional information (Details) $ in Millions, $ in Millions										12 Months Ended			48 Months Ended
	Oct. 07, 2024 USD ($)	Sep. 30, 2024 COP ($)	Sep. 30, 2024 USD ($)	Mar. 21, 2024 USD ($) shares	Jun. 07, 2023 USD ($)	Jun. 28, 2019 USD ($)	Mar. 16, 2018 USD ($)	May 25, 2016 USD ($)	Apr. 08, 2016 USD ($)	Dec. 31, 2025 COP ($) item lawsuit shares	Dec. 31, 2025 USD ($) item lawsuit shares	Dec. 31, 2024	Dec. 31, 2018 USD ($)	Mar. 31, 2026 COP ($)	Dec. 13, 2022	Jun. 28, 2019 COP ($)	Jun. 28, 2019 USD ($)	Mar. 16, 2018 COP ($)	Mar. 16, 2018 USD ($)	Apr. 28, 2017 COP ($)	Apr. 28, 2017 USD ($)
Disclosure of accrued liabilities and provisions [Line Items]
Environmental compensation and mandatory investment										1.00%	1.00%	1.00%
Minimum current plans executed \| item										245	245
Percentage of forced investment										1.00%	1.00%
Number of voluntary conservation agreements \| item										700	700
Minimum Percentage of Execution of Forced Obligation										1.00%	1.00%
Vat rate										19.00%					20.00%
VAT assessment, Contingency, Probability of success										50.00%	50.00%
Value added tax payments										$ 4,200,000.0
Value added tax, Recoverable, Credits and refund										$ 3,900,000.0				$ 710,000.0
Legal proceedings in process, claims made, value								$ 213.0
Number of former officials \| item										8	8
Number of former presidents \| item										3	3
Number of former financial vice-presidents \| item										5	5
Unidentified expenses													$ 22.0
Unidentified project cost											$ 269.0
Equity investments
Disclosure of accrued liabilities and provisions [Line Items]
Fair value valuation of shares		$ 915,003.0	$ 234.5
Series B Non voting preferred stock
Disclosure of accrued liabilities and provisions [Line Items]
Percentage of shares issued upon conversion				19.90%						19.90%	19.90%
VAT on Imports of Gasoline and Diesel Fuel
Disclosure of accrued liabilities and provisions [Line Items]
Value added tax assessments, Interest accrued										$ 4,900,000.0
VAT on Imports of Gasoline and Diesel Fuel \| Tax Periods Between 2022 and 2024
Disclosure of accrued liabilities and provisions [Line Items]
Number of official assessments issued \| item										2	2
Value added tax assessments										$ 6,500,000.0
McDermott International Ltd
Disclosure of accrued liabilities and provisions [Line Items]
Proceeds from sale of business	$ 475.0
McDermott International Ltd \| Series B Non voting preferred stock
Disclosure of accrued liabilities and provisions [Line Items]
Number of shares issued as a plan of restructuring \| shares				75,000						75,000	75,000
Refineria de Cartagena S.A.S
Disclosure of accrued liabilities and provisions [Line Items]
Legal proceedings in process, claims made, value									$ 2,000.0
Contingent asset non detailed counterclaim																				$ 387,558.0	$ 116.0
Letter of credit compliance																					$ 70.0
Contingent asset claim																		$ 432,303.0	$ 129.0
Contingent asset claim invoices provisionally paid						$ 137.0	$ 139.0
Legal proceedings in process, claims made, value updated including interest																$ 503,241.0	$ 137.0
Amount awarded to other party					$ 1,000.0
Dismissal of claim amount by Plaintif					$ 400.0
Legal fees				$ 9.0
Number of former officials being investigated \| item										8	8
Refineria de Cartagena S.A.S \| Annulment and restoration of rights
Disclosure of accrued liabilities and provisions [Line Items]
Total number of legal proceedings, lawsuits \| lawsuit										2	2
Number of additional legal proceedings \| lawsuit										4	4
Refineria de Cartagena S.A.S \| Official tax assessments and their confirmatory resolutions
Disclosure of accrued liabilities and provisions [Line Items]
Total number of legal proceedings, lawsuits \| lawsuit										2	2
Refineria de Cartagena \| VAT on Imports of Gasoline and Diesel Fuel
Disclosure of accrued liabilities and provisions [Line Items]
Number of official assessments issued \| item										6	6
Value added tax assessments										$ 1,300,000.0
Letters of credits one \| Refineria de Cartagena S.A.S
Disclosure of accrued liabilities and provisions [Line Items]
Maximum credit loan				70.0
Letters of credits two \| Refineria de Cartagena S.A.S
Disclosure of accrued liabilities and provisions [Line Items]
Maximum credit loan				$ 95.0
Exploration and Production
Disclosure of accrued liabilities and provisions [Line Items]
Discount rates used in the estimate of the obligation										5.24%		5.88%
Transportation and Logistics
Disclosure of accrued liabilities and provisions [Line Items]
Discount rates used in the estimate of the obligation										5.64%		6.94%
Refining and Petrochemicals
Disclosure of accrued liabilities and provisions [Line Items]
Discount rates used in the estimate of the obligation										5.83%		6.59%