Revenues - Summary of Breakdown of Revenues by Type of Good or Service (Parenthetical) (Detail) - ARS ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disclosure of revenue [abstract]
Revenue from natural gas produced by the Company	$ 55,882	$ 28,341	$ 16,645

The amount of revenue arising from the sale of natural gas. [Refer: Current natural gas; Revenue]

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration