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RISK MANAGEMENT POLICIES - Sensitivity analysis performed reasonably possible changes in foreign exchange rates (Details) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Foreign currency sensitivity analysis |  |
Exchange rate variation | 31.90% | 29.00%
Exchange rate variation | (31.90%) | (29.00%)
Increase in profit loss | $ 251,960 | $ 563,543
Decrease in profit loss | (251,960) | (563,543)
Increase in equity | 251,960 | 563,543
Decrease in equity | $ (251,960) | $ (563,543)
US Dollar [member] |  |
Foreign currency sensitivity analysis |  |
Exchange rate variation | 31.90% | 29.00%
Exchange rate variation | (31.90%) | (29.00%)
Increase in profit loss | $ 200,700 | $ 518,252
Decrease in profit loss | (200,700) | (518,252)
Increase in equity | 200,700 | 518,252
Decrease in equity | $ (200,700) | $ (518,252)
Euro [member] |  |
Foreign currency sensitivity analysis |  |
Exchange rate variation | 31.90% | 29.00%
Exchange rate variation | (31.90%) | (29.00%)
Increase in profit loss | $ 5,724 | $ (4,884)
Decrease in profit loss | (5,724) | 4,884
Increase in equity | 5,724 | (4,884)
Decrease in equity | $ (5,724) | $ 4,884
Others [member] |  |
Foreign currency sensitivity analysis |  |
Exchange rate variation | 31.90% | 29.00%
Exchange rate variation | (31.90%) | (29.00%)
Increase in profit loss | $ 45,536 | $ 50,176
Decrease in profit loss | (45,536) | (50,176)
Increase in equity | 45,536 | 50,176
Decrease in equity | $ (45,536) | $ (50,176)

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