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FAIR VALUES - Fair value of financial instruments (Details) - Fair value - ARS ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | $ 146,285,430 | $ 788,678,497
Financial liabilities | 72,999,884 | 62,133,638
Debt Securities At Fair Value Through Profit Or Loss |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 46,415,822 | 69,707,595
Derivatives |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 3,795,093 | 920,381
Other financial assets |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 21,064,292 | 18,566,566
Other Debt Securities |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 28,270,031 | 653,133,045
Financial assets in guarantee |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 46,374,207 | 44,785,900
Investments in Equity Instruments |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 365,985 | 1,565,010
Liabilities at fair value through profit or loss |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial liabilities | 607,903 | 6,661,539
Other financial liabilities |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial liabilities | 72,391,981 | 55,472,099
Level 1 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 130,163,969 | 157,773,789
Financial liabilities | 72,999,884 | 62,133,638
Level 1 of fair value hierarchy [member] | Debt Securities At Fair Value Through Profit Or Loss |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 44,845,302 | 69,696,151
Level 1 of fair value hierarchy [member] | Derivatives |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets |  | 920,381
Level 1 of fair value hierarchy [member] | Other financial assets |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 21,064,292 | 18,566,566
Level 1 of fair value hierarchy [member] | Other Debt Securities |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 17,831,074 | 22,967,229
Level 1 of fair value hierarchy [member] | Financial assets in guarantee |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 46,374,207 | 44,785,900
Level 1 of fair value hierarchy [member] | Investments in Equity Instruments |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 49,094 | 837,562
Level 1 of fair value hierarchy [member] | Liabilities at fair value through profit or loss |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial liabilities | 607,903 | 6,661,539
Level 1 of fair value hierarchy [member] | Other financial liabilities |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial liabilities | 72,391,981 | 55,472,099
Level 2 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 15,804,570 | 630,177,260
Level 2 of fair value hierarchy [member] | Debt Securities At Fair Value Through Profit Or Loss |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 1,570,520 | 11,444
Level 2 of fair value hierarchy [member] | Derivatives |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 3,795,093 |
Level 2 of fair value hierarchy [member] | Other Debt Securities |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 10,438,957 | 630,165,816
Level 3 of fair value hierarchy [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | 316,891 | 727,448
Level 3 of fair value hierarchy [member] | Investments in Equity Instruments |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Financial assets | $ 316,891 | $ 727,448

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