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30. Provisions (Details) - ARS ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
SummaryOfProvisionsLineItems [Line Items]    
Provisions, beginning $ 1,645,569  
Provisions, ending 2,062,603 $ 1,645,569
Non-current liabilities    
SummaryOfProvisionsLineItems [Line Items]    
Provisions, beginning 1,645,569 1,357,972
Increases 1,239,577 725,897
Decreases (20,596) (131,722)
Result from exposure to inflation (801,947) (306,578)
Provisions, ending 2,062,603 1,645,569
Current liabilities    
SummaryOfProvisionsLineItems [Line Items]    
Provisions, beginning 288,218 293,482
Increases 127,655 387,547
Decreases (77,473) (368,410)
Result from exposure to inflation (124,564) (24,401)
Provisions, ending $ 213,836 $ 288,218