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NON-CURRENT ASSETS HELD FOR SALE - Roll forward (Details) - COP ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Balance at the beginning of the year | $ 101,184 |  |
Balance at year end balance | 105,214 | $ 101,184 |
Non-current assets held for sale [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Balance at the beginning of the year | 101,184 | 92,830 | $ 208,426
Additions | 102,486 | 72,466 | 74,812
Assets sold, net | (53,838) | (118,808) | (51,863)
Increase / decrease by changes in fair value | (4,662) | (268) | (76)
Reclassifications | (44,457) | 62,058 | (88,609)
Effect of movements in exchange rates | 4,501 | (7,094) | 13,960
Loss of control in subsidiary |  |  | (72,014)
Discontinued operations |  |  | 8,194
Balance at year end balance | 105,214 | 101,184 | 92,830
Withdrawals from leaseback operation | (17,825) | (79,546) | (15,179)
Non-current assets held for sale [member] | Investment property [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | 22,370 | (95,593) | (31,184)
Non-current assets held for sale [member] | Other assets [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | 27,868 | 25,654 | (62,943)
Non-current assets held for sale [member] | Property, plant and equipment [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | 1,193 | $ 131,997 | $ 5,536
Non-current assets held for sale [member] | Concession arrangements [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | $ 6,974 |  |

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