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18 Trade receivables (Details 2) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Summary of trade receivables [line items]    
Trade receivables $ 14,151 $ 16,961
Not due [member]    
Summary of trade receivables [line items]    
Trade receivables 9 11
Past due [member]    
Summary of trade receivables [line items]    
Trade receivables 3,714 2,586
Up to 3 months [member]    
Summary of trade receivables [line items]    
Trade receivables $ 10,428 $ 14,364