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Acquisitions and Dispositions - Summary of the Main Results Associated with the Investment in YPF EE (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of income associated with investment [Line Items]      
Income $ 252,813 $ 210,100 $ 156,136
Costs (211,812) (177,304) (119,537)
Gross income 41,001 32,796 36,599
Operating profit 16,073 (24,246) 16,588
Income from investments in companies 500 206 111
Net financial results (8,798) (6,146) 12,157
Income tax 3,969 $ 1,425 $ (24,637)
YPF EE [member]      
Disclosure of income associated with investment [Line Items]      
Income 1,908    
Costs (594)    
Gross income 1,314    
Operating profit 1,122    
Income from investments in companies 90    
Net financial results (76)    
Income tax (268)    
Net income without deletions 868    
Deletions 241    
Net income with deletions $ 1,109