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Financial Risk Management - Summary of Breakdown of the Financial Assets (Detail) - ARS ($)
$ in Millions
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets $ 100,190 $ 78,280 $ 61,585
Current Trade Receivable [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 11,822    
Current Trade Receivable [member] | Less than three months past due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 5,603    
Current Trade Receivable [member] | Between three and six months past due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 3,820    
Current Trade Receivable [member] | More than six months past due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 2,399    
Other Current Receivables [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 2,233    
Other Current Receivables [member] | Less than three months past due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 798    
Other Current Receivables [member] | Between three and six months past due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 453    
Other Current Receivables [member] | More than six months past due [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets $ 982