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29 Borrowings (Details) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Disclosure of detailed information about borrowings [line items]    
Non-current borrowings $ 8,261 $ 11,159
Current borrowings 143 2,259
Interest from corporate notes [member]    
Disclosure of detailed information about borrowings [line items]    
Current borrowings 143 196
Borrowings [member]    
Disclosure of detailed information about borrowings [line items]    
Current borrowings 2,063
Corporate notes [member]    
Disclosure of detailed information about borrowings [line items]    
Non-current borrowings [1] $ 8,261 $ 11,159
[1] Net of debt issuance, repurchase and redemption expenses.