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Segment Information - Summary of Segment Informations (Detail) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Disclosure of operating segments [line items] |  |  |
Revenues from sales | $ 669,186 | $ 678,595 | $ 435,820
Revenues | 669,186 | 678,595 | 435,820
Operating profit / (loss) | (58,397) | (21,012) | 43,780
Income from equity interests in associates and joint ventures | 13,270 | 7,968 | 4,839
Depreciation of property, plant and equipment | 171,452 | 145,894 | 87,569
(Recovery) of property, plant and equipment |  |  | (2,900)
(Recovery) / Impairment of property, plant and equipment and intangible assets, net | (6,851) | 41,429 |
Acquisition of property, plant and equipment | 96,278 | (172,844) | 83,648
Assets | 1,923,225 | 1,573,289 | 994,016
Operating segments [member] | Upstream [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 2,419 | 2,046 | 3,108
Revenues from intersegment sales | 289,421 | 286,585 | 207,480
Revenues | 291,840 | 288,631 | 210,588
Operating profit / (loss) | (25,878) | (49,194) | 22,483
Depreciation of property, plant and equipment | 128,132 | 119,821 | 72,052
(Recovery) of property, plant and equipment |  |  | (2,900)
(Recovery) / Impairment of property, plant and equipment and intangible assets, net | (7,475) | 40,561 |
Acquisition of property, plant and equipment | 63,071 | (136,589) | 63,171
Assets | 914,257 | 742,850 | 480,263
Operating segments [member] | Gas and power segment [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 122,254 | 131,055 | 91,176
Revenues from intersegment sales | 8,060 | 8,697 | 7,862
Revenues | 130,314 | 139,752 | 99,038
Operating profit / (loss) | (18,994) | 2,944 | 16,786
Income from equity interests in associates and joint ventures | 9,199 | 5,339 | 4,435
Depreciation of property, plant and equipment | 1,858 | 1,378 | 928
(Recovery) / Impairment of property, plant and equipment and intangible assets, net | 527 | 868 |
Acquisition of property, plant and equipment | 4,905 | (6,170) | 1,968
Assets | 209,225 | 199,357 | 129,885
Operating segments [member] | Downstream [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 536,714 | 531,724 | 338,042
Revenues from intersegment sales | 3,349 | 3,447 | 1,688
Revenues | 540,063 | 535,171 | 339,730
Operating profit / (loss) | 4,839 | 40,653 | 7,818
Income from equity interests in associates and joint ventures | 4,071 | 2,629 | 404
Depreciation of property, plant and equipment | 34,295 | 20,805 | 12,285
Acquisition of property, plant and equipment | 23,420 | (22,455) | 15,632
Assets | 646,589 | 508,026 | 307,312
Operating segments [member] | Central Administration and Others [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 14,108 | 19,743 | 8,363
Revenues from intersegment sales | 28,787 | 27,502 | 13,186
Revenues | 42,895 | 47,245 | 21,549
Operating profit / (loss) | (22,305) | (15,866) | (6,055)
Depreciation of property, plant and equipment | 7,167 | 3,890 | 2,304
(Recovery) / Impairment of property, plant and equipment and intangible assets, net | 97 |  |
Acquisition of property, plant and equipment | 4,882 | (7,630) | 2,877
Assets | 152,816 | 129,331 | 82,762
Consolidation Adjustments [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | (6,309) | (5,973) | (4,869)
Revenues from intersegment sales | (329,617) | (326,231) | (230,216)
Revenues | (335,926) | (332,204) | (235,085)
Operating profit / (loss) | 3,941 | 451 | 2,748
Assets | $ 338 | $ (6,275) | $ (6,206)

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