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Loans - Schedule of Loans (Parenthetical) (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2017
ARS ($)
Dec. 31, 2016
ARS ($)
Dec. 31, 2015
ARS ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2014
ARS ($)
Disclosure of detailed information about borrowings [line items]            
Repurchase of negotiable obligations $ 309 $ 672 $ 1,349      
Loans from banks 191,063 154,345 105,751     $ 49,305
Cancellation of negotiable obligations 1,528 3,253 9,970 $ 15,850 $ 11,248  
Proceeds from loans 54,719 101,322 55,158      
Banco Nacion Argentina [member]            
Disclosure of detailed information about borrowings [line items]            
Loans from banks 2,500 2,105 460      
Bank overdrafts   1,440 1,926      
Banco Nacion Argentina [member] | Badlar Variable Rate Plus Margin of 3.5 Percentage [member]            
Disclosure of detailed information about borrowings [line items]            
Loans accrued $ 1,500 $ 2,000        
Interest rate 3.50% 3.50%   3.50% 3.50%  
Banco Nacion Argentina [member] | Badlar Variable Rate Plus Spread of 4 Percentage [member]            
Disclosure of detailed information about borrowings [line items]            
Loans accrued   $ 105 $ 250      
Interest rate   4.00% 4.00%   4.00%  
Banco Nacion Argentina [member] | Fixed interest rate [member]            
Disclosure of detailed information about borrowings [line items]            
Loans accrued $ 1,000   $ 210      
Interest rate 20.00%   15.00% 20.00%    
Negotiable obligations and financial loans [Member]            
Disclosure of detailed information about borrowings [line items]            
Proceeds from loans $ 492 $ 4,960 $ 2,575