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Financial Risk Management - Summary of Breakdown of the Financial Assets (Detail) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of financial assets [line items]      
Financial assets $ 235,000 $ 233,530 $ 170,759
Current Trade Receivable [member]      
Disclosure of financial assets [line items]      
Financial assets 31,145    
Current Trade Receivable [member] | Less than three months past due [member]      
Disclosure of financial assets [line items]      
Financial assets 11,670    
Current Trade Receivable [member] | Between three and six months past due [member]      
Disclosure of financial assets [line items]      
Financial assets 3,532    
Current Trade Receivable [member] | More than six months past due [member]      
Disclosure of financial assets [line items]      
Financial assets 15,943    
Other Current Receivables [member]      
Disclosure of financial assets [line items]      
Financial assets 2,457    
Other Current Receivables [member] | Less than three months past due [member]      
Disclosure of financial assets [line items]      
Financial assets 574    
Other Current Receivables [member] | Between three and six months past due [member]      
Disclosure of financial assets [line items]      
Financial assets 255    
Other Current Receivables [member] | More than six months past due [member]      
Disclosure of financial assets [line items]      
Financial assets $ 1,628