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FAIR VALUES - Fair value of equity instruments changes in other comprehensive income (Details) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | $ 13,539 | $ 17,984
Income through OCI | (4,756) | 1,603
Exposure to changes in Purchasing Power | 8,783 | (6,048)
Ending balance of fair value of equity instruments |  | 13,539
MAE [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 7,092 | 10,470
Income through OCI | (2,482) |
Exposure to changes in Purchasing Power | 4,610 | (3,378)
Ending balance of fair value of equity instruments |  | 7,092
SEDESA [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 2,483 | 3,666
Income through OCI | (869) |
Exposure to changes in Purchasing Power | 1,614 | (1,183)
Ending balance of fair value of equity instruments |  | 2,483
COELSA [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 1,414 | 2,088
Income through OCI | (495) |
Exposure to changes in Purchasing Power | 919 | (674)
Ending balance of fair value of equity instruments |  | 1,414
PROVINCANJE [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 417 | 615
Income through OCI | (145) |
Exposure to changes in Purchasing Power | 272 | (198)
Ending balance of fair value of equity instruments |  | 417
CUYO AVAL SGR [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 1,383 | 505
Income through OCI | (334) | 1,229
Exposure to changes in Purchasing Power | 1,049 | (351)
Ending balance of fair value of equity instruments |  | 1,383
ARGEN CONTROL [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 193 | 285
Income through OCI | (68) |
Exposure to changes in Purchasing Power | 125 | (92)
Ending balance of fair value of equity instruments |  | 193
LOS GROBO SGR [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 321 | 154
Income through OCI | (251) | 255
Exposure to changes in Purchasing Power | 70 | (88)
Ending balance of fair value of equity instruments |  | 321
IEBA SA [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 93 | 138
Income through OCI | (32) |
Exposure to changes in Purchasing Power | 61 | (45)
Ending balance of fair value of equity instruments |  | 93
Others [member] |  |
Disclosure of fair value measurement of assets and liability [line items] |  |
Beginning balance of fair value of equity instruments | 143 | 63
Income through OCI | (80) | 119
Exposure to changes in Purchasing Power | $ 63 | (39)
Ending balance of fair value of equity instruments |  | $ 143

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- Definition The amount of investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: At fair value [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 11A -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_11A_c&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2019-01-01 -Paragraph 8 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2019-en-r&anchor=para_8_h&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The gains (losses) recognised in other comprehensive income on financial assets measured at fair value through other comprehensive income, net of tax. [Refer: Financial assets measured at fair value through other comprehensive income; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_91_a&doctype=Standard -URIDate 2019-03-27 + Details
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