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Shareholders' Equity - Additional Information (Detail) - ARS ($)
$ / shares in Units, $ in Millions
 12 Months Ended
May 24, 2012
May 04, 2012
Dec. 31, 2018
Dec. 31, 2017
Dec. 12, 2018
Disclosure Of Detailed information Of Share Capital [line items]          
Share capital     $ 3,923    
Description in classes of shares     Four classes of shares (A, B, C and D)    
Par value of share     $ 10    
Description of voting rights     1 vote per share    
Explanation of law enacted equity structure     According to Law 26,741, achieving self-sufficiency in the supply of hydrocarbons as well as in the exploitation, industrialization, transportation and sale of hydrocarbons, is thereby declared of national public interest and a priority for Argentina, with the goal of guaranteeing socially equitable economic development, the creation of jobs, the increase of the competitiveness of various economic sectors and the equitable and sustainable growth of the provinces and regions. The shares subject to expropriation were distributed as follows: 51% for the Argentine federal government and 49% for certain Argentine Provinces.    
Reserve for the purchase of treasury shares       $ 120  
Reserves for investments       11,020  
Dividend per share         $ 3.05
Future dividends [member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Reserves for dividend       $ 1,200  
Expropation Shares of YPF Owned by Repsol [Member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Proportion of ownership interests in equity   57.43%      
Participation in the capital stock 51.00%        
Petersen Energia SAU and Affiliates [Member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Participation in the capital stock   25.46%      
Federal Government [member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Percentage of shares subject to expropriation 51.00%        
State or Province [member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Percentage of shares subject to expropriation 49.00%        
Ordinary shares [member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Number of shares of common stock     393,312,793    
Class A Shares [member]          
Disclosure Of Detailed information Of Share Capital [line items]          
Common shares outstanding     3,764    
Description of shares based on grants outstanding     The affirmative vote of Argentine Government is required for 1) mergers, 2) acquisitions of more than 50% of YPF shares in an agreed or hostile bid, 3) transfers of all the YPF's production and exploration rights, 4) the voluntary dissolution of YPF or 5) change of corporate and/or tax address outside the Argentine Republic. Items 3) and 4) will also require prior approval by the Argentine Congress.    
Proportion of maximum shares acquired by related party     50.00%