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INVESTMENTS IN ASSOCIATES AND JOINT VENTURES - Financial information of associates (Details) - COP ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of associates [line items] |  |  |  |
Assets | $ 301,181,596 | $ 295,591,236 |  |
Liabilities | 269,661,180 | 264,769,577 |  |
Equity | 31,520,416 | 30,821,659 | $ 39,471,647 | $ 35,439,557
Income | 47,658,238 | 37,274,770 | 39,064,493 |
Expenses | 45,481,122 | 32,405,637 | 33,395,991 |
Net income for the year | $ 2,177,116 | 4,869,133 | $ 5,668,502 |
Homogenizations Percentage | 100.00% |  |  |
Associates [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | $ 13,551,590 | 12,415,610 |  |
Liabilities | 10,123,377 | 8,777,410 |  |
Equity | 3,428,213 | 3,638,200 |  |
Income | 8,924,992 | 8,221,124 |  |
Expenses | 7,874,084 | 7,185,356 |  |
Net income for the year | 1,050,908 | 1,035,768 |  |
Gas Natural de Lima y Callao S.A. Calidda [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 6,116,364 | 6,733,310 |  |
Liabilities | 4,521,154 | 4,832,852 |  |
Equity | 1,595,210 | 1,900,458 |  |
Income | 3,832,676 | 3,459,381 |  |
Expenses | 3,378,051 | 3,016,832 |  |
Net income for the year | 454,625 | 442,549 |  |
Gases del Caribe S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 4,066,193 | 3,608,541 |  |
Liabilities | 2,974,633 | 2,547,812 |  |
Equity | 1,091,560 | 1,060,729 |  |
Income | 3,104,261 | 3,049,998 |  |
Expenses | 2,730,690 | 2,678,762 |  |
Net income for the year | 373,571 | 371,236 |  |
Credibanco S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 431,534 | 416,819 |  |
Liabilities | 180,505 | 189,622 |  |
Equity | 251,029 | 227,197 |  |
Income | 329,109 | 283,294 |  |
Expenses | 293,021 | 258,230 |  |
Net income for the year | 36,088 | 25,064 |  |
Redeban Multicolor S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 2,101,985 | 981,505 |  |
Liabilities | 1,918,782 | 817,262 |  |
Equity | 183,203 | 164,243 |  |
Income | 443,196 | 363,785 |  |
Expenses | 423,438 | 331,105 |  |
Net income for the year | 19,758 | 32,680 |  |
A.C.H Colombia S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 342,153 | 215,653 |  |
Liabilities | 232,328 | 120,605 |  |
Equity | 109,825 | 95,048 |  |
Income | 292,592 | 245,030 |  |
Expenses | 184,168 | 148,782 |  |
Net income for the year | 108,424 | 96,248 |  |
Aerocali S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 92,950 | 106,967 |  |
Liabilities | 44,172 | 45,969 |  |
Equity | 48,778 | 60,998 |  |
Income | 254,751 | 247,929 |  |
Expenses | 209,945 | 188,515 |  |
Net income for the year | 44,806 | 59,414 |  |
Colombiana de Extrusion S.A. Extrucol [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 112,151 | 100,728 |  |
Liabilities | 63,795 | 59,658 |  |
Equity | 48,356 | 41,070 |  |
Income | 183,121 | 160,587 |  |
Expenses | 167,562 | 151,815 |  |
Net income for the year | 15,559 | 8,772 |  |
ADL Digital Lab SAS [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 71,577 | 63,442 |  |
Liabilities | 35,602 | 38,620 |  |
Equity | 35,975 | 24,822 |  |
Income | 74,645 | 57,360 |  |
Expenses | 63,492 | 44,344 |  |
Net income for the year | 11,153 | 13,016 |  |
Servicios de Identidad Digital S.A.S [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 50,428 | 25,995 |  |
Liabilities | 22,812 | 4,846 |  |
Equity | 27,616 | 21,149 |  |
Income | 857 | 754 |  |
Expenses | 19,694 | 22,101 |  |
Net income for the year | (18,837) | (21,347) |  |
Energia Eficiente S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 124,797 | 106,493 |  |
Liabilities | 100,424 | 80,168 |  |
Equity | 24,373 | 26,325 |  |
Income | 328,840 | 271,988 |  |
Expenses | 325,794 | 267,999 |  |
Net income for the year | 3,046 | 3,989 |  |
Metrex S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 41,458 | 54,170 |  |
Liabilities | 29,170 | 39,743 |  |
Equity | 12,288 | 14,427 |  |
Income | 80,944 | 79,880 |  |
Expenses | 78,229 | 74,959 |  |
Net income for the year | 2,715 | 4,921 |  |
Concentra Inteligencia en Energia S.A.S. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets |  | 1,987 |  |
Liabilities |  | 253 |  |
Equity |  | 1,734 |  |
Income |  | 1,138 |  |
Expenses |  | 1,912 |  |
Net income for the year |  | (774) |  |
Joint ventures [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 120,113 | 104,729 |  |
Liabilities | 115,786 | 96,345 |  |
Equity | 4,327 | 8,384 |  |
Income | 34,762 | 8,473 |  |
Expenses | 38,774 | 5,168 |  |
Net income for the year | (4,012) | 3,305 |  |
Renting Automayor S.A. [member] |  |  |  |
Disclosure of associates [line items] |  |  |  |
Assets | 120,113 | 104,729 |  |
Liabilities | 115,786 | 96,345 |  |
Equity | 4,327 | 8,384 |  |
Income | 34,762 | 8,473 |  |
Expenses | 38,774 | 5,168 |  |
Net income for the year | $ (4,012) | $ 3,305 |  |

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