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30 Salaries and social security taxes payable (Details) - ARS ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
SalariesAndSocialSecurityTaxesLineItems [Line Items]    
Total non-current $ 303 $ 327
Total current 3,734 3,278
Early retirements payable [member]    
SalariesAndSocialSecurityTaxesLineItems [Line Items]    
Total non-current 24 54
Total current 26 38
Seniority-based bonus [member]    
SalariesAndSocialSecurityTaxesLineItems [Line Items]    
Total non-current 279 273
Salaries payable and provisions [member]    
SalariesAndSocialSecurityTaxesLineItems [Line Items]    
Total current 3,376 2,866
Social security payable [member]    
SalariesAndSocialSecurityTaxesLineItems [Line Items]    
Total current $ 332 $ 374