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4 Accounting policies (Detail Narrative) - ARS ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of accounting policies [line items] |  |  |
Other finance costs | $ 1,890 | $ 4,796 | $ 4,114
Description of income tax percentage | Calculated from the beginning to the end of each year, exceeds fifty-five percent (55%), thirty percent (30%) and fifteen percent (15%) for fiscal years 2018, 2019 and 2020, respectively. Although as of December 31, 2018, the IPC cumulative variation did not exceed the 55% threshold for the application of the tax inflation adjustment in that first fiscal year, as of December 31, 2020 and 2019, the IPC cumulative variations for the 12 months of each year amounted to 36.13% and 53.77%, respectively, which exceed the 15% and 30% thresholds fixed for the third and second transition years of the tax inflation adjustment, and, therefore, the Company has applied the tax inflation adjustment in the calculation of the current and deferred income tax provision. |  |
Income tax payable rate | 30.00% | 30.00% | 30.00%
Facilities in service [member] |  |  |
Disclosure of accounting policies [line items] |  |  |
Estimated useful lives | Between 30 and 50 years |  |
Furniture, tools and equipment [member] |  |  |
Disclosure of accounting policies [line items] |  |  |
Estimated useful lives | Between 5 and 20 years |  |
Land [member] |  |  |
Disclosure of accounting policies [line items] |  |  |
Estimated useful lives | Not depreciated |  |

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- Definition Schedule of accounting Policies line Items. + References No definition available. + Details
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of finance costs that the entity does not separately disclose in the same statement or note. [Refer: Finance costs] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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