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Investments in associates and joint ventures - Composition and movements (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | ---
Joint ventures |  |  |  |
Investments in joint ventures | $ 6,073,255 | $ 5,875,015 |  |
Associates |  |  |  |
Investments in associates | 2,578,618 | 2,543,617 |  |
Total investments in subsidiaries, joint ventures and associates | 8,651,873 | 8,418,632 | $ 9,496,600 | $ 8,357,186
Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 6,474,609 | 6,291,743 |  |
Associates |  |  |  |
Investments in associates | 2,588,017 | 2,553,016 |  |
Accumulated impairment |  |  |  |
Associates |  |  |  |
Investments in associates | (9,399) | (9,399) |  |
Gases del Caribe S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 1,529,219 | 1,527,699 |  |
ATP Tower Holdings | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 755,632 | 720,332 |  |
Gas Natural del Oriente S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 154,746 | 156,353 |  |
Gases de la Guajira S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 71,073 | 69,996 |  |
E2 Energia Eficiente S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 31,783 | 34,432 |  |
Extrucol S.A. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 32,137 | 30,147 |  |
Serviport S.A. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 9,399 | 9,399 |  |
Sociedad Portuaria Olefinas y Derivados S.A. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 4,028 | 4,658 |  |
Interligao Eltrica do Madeira S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,698,178 | 1,705,188 |  |
Transmissora Aliana de Energia Eltrica S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,513,758 | 1,513,497 |  |
Equion Energa Limited |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,597,163 | 1,329,394 |  |
Equion Energa Limited | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,178,279 | 1,037,418 |  |
Equion Energa Limited | Accumulated impairment |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | (392,809) | (408,183) |  |
Interligao Eltrica Paraguau S.A | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 514,509 | 526,294 |  |
Interligao Eltrica Iva S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 488,211 | 456,076 |  |
Interligao Eltrica Garanhuns S.A | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 478,839 | 500,889 |  |
Interligao Eltrica Aimors S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 323,434 | 335,995 |  |
Conexion Kimal Lo Aguirre S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 163,339 | 119,069 |  |
Ecodiesel Colombia S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 69,054 | 85,030 |  |
Consorcio Elctrico Yapay S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 23,505 |  |  |
PA Energa para la paz | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 8,657 |  |  |
Transnexa S.A. E.M.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 8,545 | 8,545 |  |
Transnexa S.A. E.M.A. | Accumulated impairment |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | (8,545) | (8,545) |  |
Interconexion Electrica Colombia Panama S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 4,995 | 2,544 |  |
Derivex S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,243 | 1,123 |  |
Parques de Rio | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 59 | 71 |  |
Interconexion Electrica Colombia Panama S.A.S. E.S.P | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | $ 4 | $ 4 |  |

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