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ESTIMATION OF FAIR VALUE - Measurements of fair value of liabilities on a recurring basis (Details) - COP ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | $ 294,696,465 | $ 269,661,180
Recurring fair value measurement [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 1,033,592 | 2,371,927
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 | 1,011,934 | 2,154,361
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 | 672,690 | 1,546,577
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 | 15,978 | 129,345
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 |  | 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 | 221,822 | 329,754
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 | 52,455 | 60,846
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 | 48,989 | 84,087
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 | 21,658 | 217,566
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 | 5,250 | 204,202
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 | 16,408 | 13,364
Recurring fair value measurement [member] | Level 1 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 2,469 | 4,148
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 | 2,469 | 4,148
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 |  | 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 | 2,469 | 396
Recurring fair value measurement [member] | Level 2 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of liabilities [line items] |  |
Liabilities | 1,031,123 | 2,367,779
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 | 1,009,465 | 2,150,213
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 | 672,690 | 1,546,577
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 | 15,978 | 129,345
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 | 219,353 | 329,358
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 | 52,455 | 60,846
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 | 48,989 | 84,087
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 | 21,658 | 217,566
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 | 5,250 | 204,202
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 | $ 16,408 | $ 13,364

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