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Segment Information - Summary of Segment Informations (Detail) - ARS ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of operating segments [line items] |  |  |
Revenues from sales | $ 435,820 | $ 252,813 | $ 210,100
Revenues | 435,820 | 252,813 | 210,100
Operating profit / (loss) | 43,780 | 16,073 | (24,246)
Income / (loss) from equity interests in associates and joint ventures | 4,839 | 1,428 | 588
Depreciation of property, plant and equipment | 87,569 | 53,512 | 44,752
Recovery of property, plant and equipment | 2,900 | 5,032 |
Impairment of property, plant and equipment and intangible assets |  |  | 34,943
Acquisition of property, plant and equipment | 83,648 | 53,096 | 65,048
Assets | 994,016 | 505,718 | 421,139
Operating segments [member] | Upstream [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 3,108 | 739 | 18,745
Revenues from intersegment sales | 207,480 | 115,955 | 95,398
Revenues | 210,588 | 116,694 | 114,143
Operating profit / (loss) | 22,483 | 3,877 | (26,845)
Income / (loss) from equity interests in associates and joint ventures |  |  | (1)
Depreciation of property, plant and equipment | 72,052 | 45,279 | 38,125
Recovery of property, plant and equipment | 2,900 | 5,032 |
Impairment of property, plant and equipment and intangible assets |  |  | 34,943
Acquisition of property, plant and equipment | 63,171 | 39,411 | 51,396
Assets | 480,263 | 251,525 | 236,173
Operating segments [member] | Gas and power segment [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 91,176 | 56,805 | 26,514
Revenues from intersegment sales | 7,862 | 4,075 | 3,212
Revenues | 99,038 | 60,880 | 29,726
Operating profit / (loss) | 16,786 | 3,259 | 2,008
Income / (loss) from equity interests in associates and joint ventures | 4,435 | 634 | 302
Depreciation of property, plant and equipment | 928 | 290 | 290
Acquisition of property, plant and equipment | 1,968 | 3,867 | 2,134
Assets | 129,885 | 45,395 | 25,866
Operating segments [member] | Downstream [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 338,042 | 195,321 | 162,538
Revenues from intersegment sales | 1,688 | 988 | 925
Revenues | 339,730 | 196,309 | 163,463
Operating profit / (loss) | 7,818 | 15,813 | 3,093
Income / (loss) from equity interests in associates and joint ventures | 404 | 794 | 287
Depreciation of property, plant and equipment | 12,285 | 6,926 | 5,507
Acquisition of property, plant and equipment | 15,632 | 8,179 | 9,839
Assets | 307,312 | 158,800 | 125,536
Operating segments [member] | Central Administration and Others [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | 8,363 | 2,534 | 2,303
Revenues from intersegment sales | 13,186 | 7,133 | 7,447
Revenues | 21,549 | 9,667 | 9,750
Operating profit / (loss) | (6,055) | (4,400) | (1,615)
Depreciation of property, plant and equipment | 2,304 | 1,017 | 830
Acquisition of property, plant and equipment | 2,877 | 1,639 | 1,679
Assets | 82,762 | 53,934 | 34,739
Consolidation Adjustments [member] |  |  |
Disclosure of operating segments [line items] |  |  |
Revenues from sales | (4,869) | (2,586) |
Revenues from intersegment sales | (230,216) | (128,151) | (106,982)
Revenues | (235,085) | (130,737) | (106,982)
Operating profit / (loss) | 2,748 | (2,476) | (887)
Assets | $ (6,206) | $ (3,936) | $ (1,175)

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