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Investments in associates and joint ventures - Composition and movements (Details) - COP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | --- | ---
Joint ventures |  |  |  |
Investments in joint ventures | $ 5,875,015 | $ 6,803,601 |  |
Associates |  |  |  |
Investments in associates | 2,543,617 | 2,692,999 |  |
Total investments in subsidiaries, joint ventures and associates | 8,418,632 | 9,496,600 | $ 8,357,186 | $ 3,174,628
Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 6,291,743 | 7,212,342 |  |
Associates |  |  |  |
Investments in associates | 2,553,016 | 2,702,398 |  |
Accumulated impairment |  |  |  |
Associates |  |  |  |
Investments in associates | (9,399) | (9,399) |  |
Gases del Caribe S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 1,527,699 | 1,495,341 |  |
ATP Tower Holdings | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 720,332 | 913,218 |  |
Gas Natural del Oriente S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 156,353 | 148,254 |  |
Gases de la Guajira S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 69,996 | 69,376 |  |
E2 Energia Eficiente S.A. E.S.P. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 34,432 | 34,944 |  |
Extrucol S.A. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 30,147 | 27,680 |  |
Serviport S.A. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 9,399 | 9,399 |  |
Sociedad Portuaria Olefinas y Derivados S.A. | Cost |  |  |  |
Associates |  |  |  |
Investments in associates | 4,658 | 4,186 |  |
Interligacao, Electrica do Madeira S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,705,188 | 1,871,142 |  |
Transmissora Alianca de Energia Electrica S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,513,497 | 1,830,504 |  |
Equion Energa Limited |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,329,394 | 1,639,264 |  |
Equion Energa Limited | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,037,418 | 1,191,154 |  |
Equion Energa Limited | Accumulated impairment |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | (408,183) | (400,196) |  |
Interligacao Electrica Paraguacu S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 526,294 | 614,112 |  |
Interligacao Electrica Garanhuns S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 500,889 | 571,328 |  |
Interligacao Electrica Ivai S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 456,076 | 469,176 |  |
Interligacao Electrica Aimores S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 335,995 | 411,495 |  |
Conexion Kimal Lo Aguirre S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 119,069 | 169,230 |  |
Ecodiesel Colombia S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 85,030 | 54,614 |  |
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 | 2,544 | 20,516 |  |
Derivex S.A. | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 1,123 | 439 |  |
Parques de Rio | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | 71 | 83 |  |
Interconexion Electrica Colombia Panama S.A.S. E.S.P | Cost |  |  |  |
Joint ventures |  |  |  |
Investments in joint ventures | $ 4 | $ 4 |  |

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