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EQUITY - Provisions of the Telecom Ordinary and Extraordinary Shareholders' meeting (Details) - ARS ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Retained earnings |  |
Equity |  |
Absorption of retained earnings balances to (from) reserves | $ 8,378 | $ 6,633,713,897
Voluntary reserve for capital investments |  |
Equity |  |
Absorption of retained earnings balances to (from) reserves | 2,439 | 1,931,029,240
Voluntary reserve for capital investments | Expressed in current currency as measured on April 30, 2020 |  |
Equity |  |
Absorption of retained earnings balances to (from) reserves | 4,473 | 3,541,443,368
Facultative Reserve to maintain the capital investments level and the current level of solvency |  |
Equity |  |
Absorption of retained earnings balances to (from) reserves | (5,939) | 4,702,684,657
Contributed Surplus |  |
Equity |  |
Absorption of retained earnings balances to (from) reserves | $ 13,751 | $ 10,887,950,778

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