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Income Tax - Additional Information (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Deferred income tax assets, net $ 2,629 $ 1,583 $ 301
Deferred income tax liabilities, net 119,609 97,231 91,125
Current tax liabilities, current 740 1,964 357
Current tax liabilities, non-current 3,571 3,387  
Amounts of deferred tax assets not recognised $ 956 $ 0 $ 0
Date of initial maturity 2021    
Date of expiration 2025    
Tax year one [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Threshold percentage for annual variation in inflation 55.00%    
Tax year two [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Threshold percentage for annual variation in inflation 30.00%    
Tax year three [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Threshold percentage for annual variation in inflation 15.00%    
Payment plan [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Current tax liabilities, current $ 513    
Current tax liabilities, non-current $ 3,551    
Argentina [member]      
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]      
Tax loss carryforwards expire expire within 5 years.    
Deferred income tax assets, net $ 82,601