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12 Net finance costs (Details) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Summary of net financial costs [line items] |  |  |
Total financial income | $ 55 | $ 78 | $ 176
Total finance costs | (9,276) | (9,205) | (10,416)
Total other finance costs | (1,890) | (4,796) | (4,114)
Total net finance costs | (11,111) | (13,923) | (14,354)
Financial interest [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total financial income | 25 | 75 | 72
Other interest [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total financial income | 30 | 3 | 104
Commercial interest [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total finance costs | (5,986) | (4,069) | (6,191)
Interest and other [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total finance costs | (3,170) | (5,106) | (4,159)
Fiscal interest [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total finance costs | (109) | (7) | (48)
Bank fees and expenses [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total finance costs | (11) | (23) | (18)
Changes in fair value of financial assets [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total other finance costs | 989 | 383 | 1,563
Net gain from the repurchase of Corporate Notes [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total other finance costs | 415 | 622 | 10
Exchange differences [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total other finance costs | (2,955) | (5,674) | (5,506)
Adjustment to present value of receivables [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total other finance costs | (129) | (104) | (1)
Recovery of provision for credit RDSA [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total other finance costs |  |  |
Other finance costs [member] |  |  |
Summary of net financial costs [line items] |  |  |
Total other finance costs | $ (210) | $ (23) | $ (180)

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- Definition The amount of costs associated with financing activities of the entity. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 82 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_82_b&doctype=Standard -URIDate 2020-01-01 + Details
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