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PROPERTY, PLANT AND EQUIPMENT - Property, plant and equipment, Net (Details) - ARS ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Property, plant and equipment |  |  |
Property, plant and equipment | $ 320,863 | $ 334,903 |
Net carring value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 324,279 | 338,044 |
PP&E | Gross value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 520,339 | 487,357 | $ 421,057
PP&E | Allowance for obsolescence of inventories |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | (812) | (1,092) | (697)
PP&E | Net carring value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 324,279 | 338,044 |
Other | Gross value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 2,046 | 1,658 | 1,808
Other | Net carring value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 929 | 789 |
Materials | Gross value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | 26,892 | 28,851 | $ 26,375
Materials | Allowance for obsolescence of inventories |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | (2,604) | (2,049) |
Materials | Net carring value |  |  |
Property, plant and equipment |  |  |
Property, plant and equipment | $ 26,892 | $ 28,851 |

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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 16 -IssueDate 2020-01-01 -Paragraph 73 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=16&code=ifrs-tx-2020-en-r&anchor=para_73_e&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_a&doctype=Standard -URIDate 2020-01-01 + Details
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