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29 Borrowings (Details 1) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of detailed information about borrowings [line items]      
Borrowings $ 8,404 $ 13,418 $ 17,311
US dollar      
Disclosure of detailed information about borrowings [line items]      
Borrowings $ 8,404 $ 13,418