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Income tax (Details 3) - ARS ($)
$ in Millions
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2016
Income Tax      
Deferred income tax asset to be recovered after more than 12 months $ 5,865 $ 5,577  
Deferred income tax asset to be recovered within 12 months 1,093 159  
Deferred income tax assets 6,958 5,736  
Deferred income tax liability to be recovered after more than 12 months (32,597) (19,027)  
Deferred income tax liability to be recovered within 12 months (178) (9,448)  
Deferred income tax liability (32,775) (28,475)  
Deferred income tax assets (liabilities), net $ (25,817) $ (22,739) $ (19,099)