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Financial Risk Management - Summary of Breakdown of the Financial Assets (Detail) - ARS ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets $ 188,009 $ 100,190 $ 78,280
Current Trade Receivable [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 28,983    
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 19,720    
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 5,926    
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 3,337    
Other Current Receivables [member]      
Disclosure of financial assets that are either past due or impaired [line items]      
Financial assets 2,098    
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 1,262    
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 48    
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 $ 788