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Financial Risk Management - Additional Information (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Aggregate value of financial assets at fair value through profit or loss $ 44,468 $ 15,408 $ 18,733
Provision for doubtful trade receivables 19,380    
Provision for other doubtful receivables 1,204    
Guarantees granted by third parties 38,302 42,026 24,377
Executed guarantees received
Financial assets at amortized cost $ 190,532 $ 218,122 $ 152,026
Credit risk other financial assets national government and direct agencies accounts [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Percentage of maximum exposure to credit risk 33.00%    
Maximum exposure to credit risk $ 60,316    
Interest rate risk [member] | U.S. Dollar [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Percentage of financial loans denominated in foreign currency 94.00%    
Interest rate risk [member] | LIBOR [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Loans accrued $ 44,836    
Interest rate risk [member] | LIBOR [member] | Bottom of range [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Variable interest rate 0.88%    
Interest rate risk [member] | LIBOR [member] | Top of range [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Variable interest rate 8.50%    
Interest rate risk [member] | BADLAR [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Loans accrued $ 24,298    
Interest rate risk [member] | BADLAR [member] | Bottom of range [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Variable interest rate 0.10%    
Interest rate risk [member] | BADLAR [member] | Top of range [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Variable interest rate 9.85%    
Other price risk [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Aggregate value of financial assets at fair value through profit or loss $ 44,468    
Liquidity risk [member]      
Disclosure of nature and extent of risks arising from financial instruments [line items]      
Amount available for liquidity 54,618    
Cash 14,843    
Other liquid financial assets 39,775    
Financial assets at amortized cost $ 19,052