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ESTIMATION OF FAIR VALUE - Measurements of fair value of liabilities on a recurring basis (Details) - COP ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | $ 269,661,180 | $ 264,769,577
Recurring fair value measurement [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 2,371,927 | 1,761,174
Recurring fair value measurement [member] | Trading derivatives [member] | Derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 2,154,361 | 1,757,606
Recurring fair value measurement [member] | Trading derivatives [member] | Currency forward [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 1,546,577 | 885,933
Recurring fair value measurement [member] | Trading derivatives [member] | Bond forward [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 129,345 | 5,248
Recurring fair value measurement [member] | Trading derivatives [member] | Index futures | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities |  | 2,107
Recurring fair value measurement [member] | Trading derivatives [member] | Interest rate futures contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 3,752 |
Recurring fair value measurement [member] | Trading derivatives [member] | Interest rate swap contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 329,754 | 608,288
Recurring fair value measurement [member] | Trading derivatives [member] | Currency swap contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 60,846 | 112,600
Recurring fair value measurement [member] | Trading derivatives [member] | Currency Options [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 84,087 | 143,430
Recurring fair value measurement [member] | Hedging instruments [member] | Derivatives [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 217,566 | 3,568
Recurring fair value measurement [member] | Hedging instruments [member] | Currency forward [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 204,202 | 1,553
Recurring fair value measurement [member] | Hedging instruments [member] | Interest rate swap contract [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 13,364 | 2,015
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 4,148 | 2,107
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Trading derivatives [member] | Derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 4,148 | 2,107
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Trading derivatives [member] | Index futures | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities |  | 2,107
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Trading derivatives [member] | Interest rate futures contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 3,752 |
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] | Trading derivatives [member] | Interest rate swap contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 396 |
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 2,367,779 | 1,759,067
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading derivatives [member] | Derivatives [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 2,150,213 | 1,755,499
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading derivatives [member] | Currency forward [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 1,546,577 | 885,933
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading derivatives [member] | Bond forward [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 129,345 | 5,248
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading derivatives [member] | Interest rate swap contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 329,358 | 608,288
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading derivatives [member] | Currency swap contract [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 60,846 | 112,600
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Trading derivatives [member] | Currency Options [member] | Financial liabilities at fair value through profit or loss, classified as held for trading, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 84,087 | 143,430
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Hedging instruments [member] | Derivatives [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 217,566 | 3,568
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Hedging instruments [member] | Currency forward [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 204,202 | 1,553
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] | Hedging instruments [member] | Interest rate swap contract [member] | Financial liabilities at fair value through profit or loss, mandatorily measured at fair value, category [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | $ 13,364 | $ 2,015

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