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Basis of Preparation of the Consolidated Financial Statements - Additional Information (Detail)
 1 Months Ended 6 Months Ended 12 Months Ended
Aug. 31, 2016
Dec. 31, 2016
ARS ($)
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
ARS ($)
Cash_Generating_Units
Dec. 31, 2016
ARS ($)
Dec. 31, 2015
ARS ($)
Dec. 31, 2014
ARS ($)
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Current and non-current classification           The presentation in the statement of financial position makes a distinction between current and non-current assets and liabilities, according to the activities operating cycle.Current assets and liabilities include assets and liabilities, which are realized or settled within the 12-month period from the end of the fiscal year.      
Voting shares of company           This capacity is, in general but not exclusively, obtained by the ownership, direct or indirect, of more than 50% of the voting shares of a company.      
Maximum accumulated inflation rate           In order to conclude on the existence of a hyperinflationary economy, such standard describes in detail a number of quantitative and qualitative factors to be taken into account including an accumulated inflation rate during a three-year period that amounts to or exceeds 100%.      
Transportation period           The Argentine Hydrocarbons Law allows the executive branch of the Argentine government to award 35-year concessions for the transportation of oil, gas and petroleum products following submission of competitive bids. The term of a transportation concession may be extended for an additional ten-year term.      
Description of significant influence in associates           Associates are considered those in which the Group has significant influence, understood as the power to participate in the financial and operating policy decisions of the investee but does not have control or joint control over those policies. Significant influence is presumed in companies in which a company has an interest of 20% or more and less than 50%.      
Useful life of cash generating units           10 years      
General tax rate           35.00% 35.00% 35.00%  
Minimum presumed income tax rate           1.00% 1.00% 1.00%  
Personal assets tax rate           0.25% 0.25% 0.25%  
Shareholders equity attributable to shareholders of the parent company   $ 118,661,000,000       $ 152,533,000,000 $ 118,661,000,000 $ 120,461,000,000 $ 72,781,000,000
Percentage of reduction in prices of sales   6.00%              
Percentage of reduction in prices of sales 2.00%                
Impairment charge for property, plant and equipment             34,943,000,000 2,361,000,000  
Recoverable value of assets after tax   $ 71,495,000,000       82,802,000,000 71,495,000,000 76,829,000,000  
Impairment charge of intangible assets               80,000,000  
Recoverable on intangible assets               0  
Reversal for impairment of value of assets           5,032,000,000      
Legal reserve [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Shareholders equity attributable to shareholders of the parent company   $ 2,007,000,000       $ 2,007,000,000 $ 2,007,000,000 2,007,000,000 $ 2,007,000,000
Crude oil and natural gas [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Percentage of interest on royalty           12.00%      
Unconventional hydrocarbons [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Percentage of interest on royalty           10.00%      
Upstream segment [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Number of cash generating units | Cash_Generating_Units           4      
Upstream segment [member] | Crude oil reserves [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Number of cash generating units | Cash_Generating_Units           1      
Upstream segment [member] | Natural gas reserves [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Number of cash generating units | Cash_Generating_Units           3      
Gas and power segment [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Number of cash generating units | Cash_Generating_Units           3      
United States [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Impairment charge for property, plant and equipment               94,000,000  
Fair value of property and equipment               $ 179,000,000  
Metrogas S.A. [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Percentage of non-controlling interest acquired           30.00%      
YTEC [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Percentage of non-controlling interest acquired           49.00%      
Scenario, Forecast [Member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
General tax rate     25.00% 30.00% 30.00%        
Bottom of range [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Useful lives of amortized assets           3 years      
Percentage of interest in investee           20.00%      
Percentage of defined contribution plan           3.00%      
Bottom of range [member] | Legal reserve [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Percentage of legal reserve transferred           5.00%      
Top of range [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Useful lives of amortized assets           14 years      
Percentage of interest in investee           50.00%      
Percentage of defined contribution plan           10.00%      
Top of range [member] | Legal reserve [member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Maximum legal reserve of subscribed Capital plus adjustment to contribution           20.00%      
Consolidated entities [Member]                  
Disclosure of assets and liabilities with significant risk of material adjustment [line items]                  
Investment Owned Percent Of Net Assets           100.00%