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FINANCIAL RISK MANAGEMENT, Credit Risk, Trade and Other Receivables (Details) - ARS ($) $ in Thousands | 4 Months Ended | 12 Months Ended
--- | --- | ---
Apr. 27, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Current trade receivables |  | $ 6,279,974 | $ 8,997,144 |
Allowances for doubtful accounts |  | (132,521) | (183,730) | $ (277,536)
Total |  | 6,147,453 | 8,813,414 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 55,871,438 | 66,111,903 | 71,336,882
Trade receivables |  | 6,147,453 | 8,813,414 |
Cash and financial placements [Abstract] |  |  |  |
Exchange losses on financial instruments |  | (7,977,729) |  |
Subsequent Event [Member] |  |  |  |
Cash and financial placements [Abstract] |  |  |  |
Exchange losses on financial instruments | $ (1,346,192) |  |  |
Natural Gas Transportation [Member] |  |  |  |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  |  | 30,795,577 |
Natural Gas Transportation [Member] | MetroGas [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 1,441,808 | 1,986,849 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 5,894,110 | 7,963,051 | 6,749,054
Trade receivables |  | 1,441,808 | 1,986,849 |
Natural Gas Transportation [Member] | Camuzzi Gas Pampeana S.A. [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 706,139 | 992,651 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 4,358,139 | 5,926,232 | 5,013,132
Trade receivables |  | 706,139 | 992,651 |
Natural Gas Transportation [Member] | Naturgy Argentina [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 313,536 | 772,501 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 3,523,002 | 4,759,550 | 4,045,276
Trade receivables |  | 313,536 | 772,501 |
Natural Gas Transportation [Member] | CAMMESA [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 666,127 | 280,998 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 2,342,531 | 1,821,557 | 2,801,553
Trade receivables |  | 666,127 | 280,998 |
Natural Gas Transportation [Member] | Pampa Energia [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 306,995 | 351,252 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 841,274 | 1,094,039 | 920,555
Trade receivables |  | 306,995 | 351,252 |
Natural Gas Transportation [Member] | Camuzzi Gas del Sur S.A. [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 146,965 | 205,352 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 1,042,980 | 1,464,524 | 1,119,315
Trade receivables |  | 146,965 | 205,352 |
Liquids Production and Commercialization [Member] | PBB Polisur [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 777,791 | 1,145,402 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 9,303,676 | 8,628,893 | 11,031,223
Trade receivables |  | 777,791 | 1,145,402 |
Liquids Production and Commercialization [Member] | Petredec [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 0 | 0 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 691,227 | 1,365,850 | 1,798,666
Trade receivables |  | 0 | 0 |
Liquids Production and Commercialization [Member] | Geogas Trading S.A. [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 0 | 511,512 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 287,550 | 2,303,376 | 2,308,545
Trade receivables |  | 0 | 511,512 |
Liquids Production and Commercialization [Member] | Italgas S.A. [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 0 | 0 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 396,307 | 0 | 0
Trade receivables |  | 0 | 0 |
Liquids Production and Commercialization [Member] | YPF [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 42,364 | 36,079 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 973,411 | 1,686,921 | 992,619
Trade receivables |  | 42,364 | 36,079 |
Liquids Production and Commercialization [Member] | Petrobras Global Trading BV [Member] |  |  |  |
Trade and Other Receivables, Current and Noncurrent [Abstract] |  |  |  |
Total |  | 284,089 | 540,712 |
Trade and other receivables [Abstract] |  |  |  |
Revenues |  | 4,510,924 | 6,053,139 | $ 3,652,024
Trade receivables |  | $ 284,089 | $ 540,712 |

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