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17 Other receivables (Details 2) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Summary of other receivables [line items]    
Other receivables $ 666 $ 429
Without expiry date [member]    
Summary of other receivables [line items]    
Other receivables 134 160
Past due [member]    
Summary of other receivables [line items]    
Other receivables 65 69
Up to 3 months [member]    
Summary of other receivables [line items]    
Other receivables 83 125
From 3 to 6 months [member]    
Summary of other receivables [line items]    
Other receivables 317 20
From 6 to 9 months [member]    
Summary of other receivables [line items]    
Other receivables 11 16
From 9 to 12 months [member]    
Summary of other receivables [line items]    
Other receivables 14 4
More than 12 months [member]    
Summary of other receivables [line items]    
Other receivables $ 42 $ 35