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Financial Risk Management - Schedule of Breakdown of Effect a Variation of 10% in Prevailing Exchange Rates on Net Income (Detail) - Exchange Rate Risk [member]
$ in Millions
 12 Months Ended
Dec. 31, 2020
ARS ($)
Positive variation impact on net income before income tax corresponding to financial assets and liabilities [member]  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Income (loss) for fiscal year ended December 31, 2020 $ (1,770)
Negative variation impact on net income before income tax corresponding to financial assets and liabilities [member]  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Income (loss) for fiscal year ended December 31, 2020 $ 1,770
Peso against U.S. dollar [member] | Positive variation impact on net income before income tax corresponding to financial assets and liabilities [member]  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Appreciation (+) / depreciation (-) of exchange rate of peso against dollar 10.00%
Peso against U.S. dollar [member] | Negative variation impact on net income before income tax corresponding to financial assets and liabilities [member]  
Disclosure of nature and extent of risks arising from financial instruments [line items]  
Appreciation (+) / depreciation (-) of exchange rate of peso against dollar (10.00%)