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33 Tax liabilities (Details) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Summary of tax liabilities [line items]    
Total Current $ 1,793 $ 2,415
Provincial, municipal and federal contributions and taxes [member]    
Summary of tax liabilities [line items]    
Total Current 459 244
VAT payable [member]    
Summary of tax liabilities [line items]    
Total Current 920 1,772
Tax withholdings [member]    
Summary of tax liabilities [line items]    
Total Current 171 200
SUSS withholdings [member]    
Summary of tax liabilities [line items]    
Total Current 10 11
Municipal taxes [member]    
Summary of tax liabilities [line items]    
Total Current $ 233 $ 188