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INCOME TAX AND DEFERRED TAX, Component of Net Deferred Tax Assets and Liabilities (Details) - ARS ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | $ (6,483,714) |
Deferred tax assets (liability), end of year | (7,448,592) | $ (6,483,714)
Deferred Tax Assets [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 1,728,787 | 1,736,422
Charge in results | (106,117) | (7,635)
Deferred tax assets (liability), end of year | 1,622,670 | 1,728,787
Deferred Tax Assets [Member] | Other Receivables [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 0 | 0
Charge in results | 13,517 | 0
Deferred tax assets (liability), end of year | 13,517 | 0
Deferred Tax Assets [Member] | Allowance for Doubtful Accounts [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 995 | 0
Charge in results | (995) | 995
Deferred tax assets (liability), end of year | 0 | 995
Deferred Tax Assets [Member] | Tax Credits Discounted Value Loss [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 484 | 811
Charge in results | (484) | (327)
Deferred tax assets (liability), end of year | 0 | 484
Deferred Tax Assets [Member] | Account Receivables Discounted Value [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 995 | 4,761
Charge in results | (352) | (3,766)
Deferred tax assets (liability), end of year | 643 | 995
Deferred Tax Assets [Member] | Provisions for Legal Claims and Other Provisions [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 210,815 | 211,326
Charge in results | 12,320 | (511)
Deferred tax assets (liability), end of year | 223,135 | 210,815
Deferred Tax Assets [Member] | Financial Lease [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 817,211 | 853,576
Charge in results | (89,081) | (36,365)
Deferred tax assets (liability), end of year | 728,130 | 817,211
Deferred Tax Assets [Member] | Contract liabilities [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 686,267 | 665,948
Charge in results | (46,704) | 20,319
Deferred tax assets (liability), end of year | 639,563 | 686,267
Deferred Tax Assets [Member] | Tax Loss Carryforward [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 0 | 0
Charge in results | 944 | 0
Deferred tax assets (liability), end of year | 944 | 0
Deferred Tax Assets [Member] | Tax Inflation Adjustment [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 12,020 | 0
Charge in results | 4,718 | 12,020
Deferred tax assets (liability), end of year | 16,738 | 12,020
Deferred Tax Liabilities [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (8,212,501) | (6,393,198)
Charge in results | (858,761) | (1,819,303)
Deferred tax assets (liability), end of year | (9,071,262) | (8,212,501)
Deferred Tax Liabilities [Member] | Tax Inflation Adjustment [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (2,223,023) | 0
Charge in results | (1,365,008) | (2,223,023)
Deferred tax assets (liability), end of year | (3,588,031) | (2,223,023)
Deferred Tax Liabilities [Member] | Deferred Sales [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | 0 | 5,945
Charge in results | 0 | (5,945)
Deferred tax assets (liability), end of year | 0 | 0
Deferred Tax Liabilities [Member] | Loans [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (35,759) | (65,093)
Charge in results | 15,815 | 29,334
Deferred tax assets (liability), end of year | (19,944) | (35,759)
Deferred Tax Liabilities [Member] | Property, Plant and Equipment [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (5,920,872) | (6,111,056)
Charge in results | 693,689 | 190,184
Deferred tax assets (liability), end of year | (5,227,183) | (5,920,872)
Deferred Tax Liabilities [Member] | Cash and Cash Equivalents [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (2,897) | (198,776)
Charge in results | 1,861 | 195,879
Deferred tax assets (liability), end of year | (1,036) | (2,897)
Deferred Tax Liabilities [Member] | Inventories [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (27,412) | (24,218)
Charge in results | (6,112) | (3,194)
Deferred tax assets (liability), end of year | (33,524) | (27,412)
Deferred Tax Liabilities [Member] | Other Financial Assets at Amortized Cost [Member] |  |
Components of Net Deferred Tax Assets and Liabilities [abstract] |  |
Deferred tax assets (liability), beginning of year | (2,538) | 0
Charge in results | (199,006) | (2,538)
Deferred tax assets (liability), end of year | $ (201,544) | $ (2,538)

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