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FINANCIAL RISK MANAGEMENT, Credit Risk, Trade and Other Receivables (Details) - ARS ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Current trade receivables | $ 6,608,715 | $ 4,994,969 |
Allowances for doubtful accounts | (134,956) | (203,860) | $ 0
Total | 6,473,759 | 4,791,109 |
Trade and other receivables [Abstract] |  |  |
Revenues | 48,561,494 | 52,399,423 | 30,694,588
Trade receivables | 6,473,759 | 4,791,109 |
Natural Gas Transportation [Member] | MetroGas [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 1,459,410 | 577,764 |
Trade and other receivables [Abstract] |  |  |
Revenues | 5,849,138 | 4,957,415 | 2,948,056
Trade receivables | 1,459,410 | 577,764 |
Natural Gas Transportation [Member] | Camuzzi Gas Pampeana S.A. [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 729,137 | 430,212 |
Trade and other receivables [Abstract] |  |  |
Revenues | 4,353,024 | 3,682,320 | 2,167,208
Trade receivables | 729,137 | 430,212 |
Natural Gas Transportation [Member] | Naturgy Argentina [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 567,429 | 368,782 |
Trade and other receivables [Abstract] |  |  |
Revenues | 3,496,055 | 2,971,396 | 1,556,829
Trade receivables | 567,429 | 368,782 |
Natural Gas Transportation [Member] | CAMMESA [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 206,403 | 281,896 |
Trade and other receivables [Abstract] |  |  |
Revenues | 1,337,997 | 2,057,838 | 1,368,671
Trade receivables | 206,403 | 281,896 |
Natural Gas Transportation [Member] | Pampa Energia [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 258,007 | 141,040 |
Trade and other receivables [Abstract] |  |  |
Revenues | 803,610 | 676,180 | 68,737
Trade receivables | 258,007 | 141,040 |
Natural Gas Transportation [Member] | Camuzzi Gas del Sur S.A. [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 150,838 | 87,574 |
Trade and other receivables [Abstract] |  |  |
Revenues | 1,075,744 | 822,176 | 477,222
Trade receivables | 150,838 | 87,574 |
Liquids Production and Commercialization [Member] | PBB Polisur [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 841,338 | 1,090,359 |
Trade and other receivables [Abstract] |  |  |
Revenues | 6,338,222 | 8,102,817 | 5,667,118
Trade receivables | 841,338 | 1,090,359 |
Liquids Production and Commercialization [Member] | Petredec [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 0 | 0 |
Trade and other receivables [Abstract] |  |  |
Revenues | 1,003,264 | 1,321,183 | 2,119,267
Trade receivables | 0 | 0 |
Liquids Production and Commercialization [Member] | Geogas Trading S.A. [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 375,723 | 0 |
Trade and other receivables [Abstract] |  |  |
Revenues | 1,691,910 | 1,695,707 | 878,783
Trade receivables | 375,723 | 0 |
Liquids Production and Commercialization [Member] | Shell Trading (US) Company [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 0 | 0 |
Trade and other receivables [Abstract] |  |  |
Revenues | 0 | 138,246 | 2,192,301
Trade receivables | 0 | 0 |
Liquids Production and Commercialization [Member] | YPF [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 26,501 | 30,968 |
Trade and other receivables [Abstract] |  |  |
Revenues | 1,239,102 | 729,113 | 0
Trade receivables | 26,501 | 30,968 |
Liquids Production and Commercialization [Member] | Petrobras Global Trading BV [Member] |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |
Total | 397,172 | 211,387 |
Trade and other receivables [Abstract] |  |  |
Revenues | 4,446,241 | 2,682,539 | $ 0
Trade receivables | $ 397,172 | $ 211,387 |

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