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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, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Balance at the beginning of the year | $ 92,830 |  |
Withdrawals from leaseback operation | (79,546) | $ (15,179) | $ (32,365)
Balance at year end balance | 101,184 | 92,830 |
Non-current assets held for sale [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Balance at the beginning of the year | 92,830 | 208,426 | 240,412
Additions | 72,466 | 74,812 | 137,710
Assets sold, net | (118,808) | (51,863) | (60,747)
Increase / decrease by changes in fair value | (268) | (76) | (3,780)
Reclassifications | 62,058 | (88,609) | (135,643)
Effect of movements in exchange rates | (7,094) | 13,960 | (8,310)
Loss of control in subsidiary |  | (72,014) |
Discontinued operations |  | 8,194 | (94)
Balance at year end balance | 101,184 | 92,830 | 208,426
Non-current assets held for sale [member] | Investment property [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | (95,593) | (31,184) | (22,847)
Non-current assets held for sale [member] | Other assets [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | 25,654 | (62,943) | (111,442)
Non-current assets held for sale [member] | Property, plant and equipment [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications | $ 131,997 | $ 5,536 | 1,074
Non-current assets held for sale [member] | Concession arrangements [member] |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications |  |  | (2,516)
Non-current assets held for sale [member] | Right of use assets |  |  |
Disclosure of noncurrent assets held-for-sale [line items] |  |  |
Reclassifications |  |  | $ 102

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