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Loans - Schedule of Loans (Detail) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent $ 527,575 $ 419,651 $ 270,252
Loans current 150,731 107,109 64,826
Argentine pesos [Member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent 11,810 8,619 26,158
Loans current 29,537 33,271 7,788
Currencies other than Argentino pesos [member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent 515,765 411,032 244,094
Loans current $ 121,194 73,838 57,038
Export pre-financing [member] | Argentine pesos [Member]      
Disclosure of detailed information about borrowings [line items]      
Maturity Year 2021    
Loans current $ 5,465    
Export pre-financing [member] | Argentine pesos [Member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 32.00%    
Export pre-financing [member] | Argentine pesos [Member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 40.50%    
Export pre-financing [member] | Currencies other than Argentino pesos [member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent $ 12,608 10,762  
Loans current $ 25,662 33,100 20,724
Export pre-financing [member] | Currencies other than Argentino pesos [member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 2.75%    
Maturity Year 2021    
Export pre-financing [member] | Currencies other than Argentino pesos [member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 7.75%    
Maturity Year 2022    
Negotiable obligations [member] | Argentine pesos [Member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent $ 6,435 8,619 26,118
Loans current $ 17,254 27,481 6,999
Negotiable obligations [member] | Argentine pesos [Member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 16.50%    
Maturity Year 2021    
Negotiable obligations [member] | Argentine pesos [Member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 39.13%    
Maturity Year 2024    
Negotiable obligations [member] | Currencies other than Argentino pesos [member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent $ 496,377 375,560 219,510
Loans current $ 62,052 13,279 17,417
Negotiable obligations [member] | Currencies other than Argentino pesos [member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.00%    
Maturity Year 2021    
Negotiable obligations [member] | Currencies other than Argentino pesos [member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 10.00%    
Maturity Year 2047    
Loans [member] | Argentine pesos [Member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent $ 5,375   40
Loans current $ 6,818 3,687 789
Loans [member] | Argentine pesos [Member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 33.00%    
Maturity Year 2021    
Loans [member] | Argentine pesos [Member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 61.00%    
Maturity Year 2024    
Loans [member] | Currencies other than Argentino pesos [member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent $ 6,780 24,710 23,616
Loans current $ 33,480 9,583 5,721
Loans [member] | Currencies other than Argentino pesos [member] | Bottom of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 0.91%    
Maturity Year 2021    
Loans [member] | Currencies other than Argentino pesos [member] | Top of range [member]      
Disclosure of detailed information about borrowings [line items]      
Interest rate 8.01%    
Maturity Year 2027    
Account Overdraft [member] | Argentine pesos [Member]      
Disclosure of detailed information about borrowings [line items]      
Loans current   2,103  
Imports Financing [member] | Currencies other than Argentino pesos [member]      
Disclosure of detailed information about borrowings [line items]      
Loans Noncurrent     968
Loans current   $ 17,876 $ 13,176