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REPORTING ENTITY - Spin off BAC Holding - Realization of other comprehensive income (Details) - COP ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Other Comprehensive Income items which were reclassified to profit or loss |  |  |  |
Hedged items |  | $ (797,514) | $ (6,675,329) | $ 2,565,637
Hedging derivative instruments |  |  | 4,051,499 | (403,983)
Hedging non-derivative instruments |  | 760,997 | 2,549,821 | (1,198,919)
Foreign currency translation differences from unhedged foreign operations |  | (409,671) | 1,356,213 | (180,798)
Unrealized gains on debt securities at FVOCI |  | 1,795,666 | (2,187,495) | (1,346,315)
Income tax expense |  | (818,733) | (1,926,071) | 1,089,263
Total other comprehensive income that will be reclassified to profit or loss, net of tax |  | $ 458,930 | (2,752,028) | $ 532,019
BAC Holding International Corp |  |  |  |
Other Comprehensive Income items which were reclassified to profit or loss |  |  |  |
Total other comprehensive income that will be reclassified to profit or loss, net of tax |  |  | $ 1,429,325 |
BAC Holding International Corp | Ifrs Discontinued Operations, Disposed of by Means Other than Sale, Spinoff [Member] |  |  |  |
Other Comprehensive Income items which were reclassified to profit or loss |  |  |  |
Hedged items | $ 6,551,200 |  |  |
Hedging derivative instruments | (4,013,210) |  |  |
Hedging non-derivative instruments | (2,761,143) |  |  |
Foreign currency translation differences from unhedged foreign operations | (1,267,033) |  |  |
Unrealized gains on debt securities at FVOCI | 98,947 |  |  |
Income tax expense | 2,443,861 |  |  |
Total other comprehensive income that will be reclassified to profit or loss, net of tax | 1,052,622 |  |  |
Total other comprehensive income that will be reclassified to profit or loss, net of tax - Attributable to owners of the parent | 723,535 |  |  |
Total reclassifications of Other Comprehensive Income to profit or loss - Attributable to non-controlling interest | 329,087 |  |  |
Total reclassifications of Other Comprehensive Income to retained earnings | (7,735) |  |  |
Total reclassifications of Other Comprehensive Income to retained earnings - Attributable to owners of the parent | (5,317) |  |  |
Total reclassifications of Other Comprehensive Income to retained earnings - Attributable to non-controlling interest | $ (2,418) |  |  |
Proportion of ownership interest in subsidiary | 68.74% |  |  |

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