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Income tax (Details 3) - ARS ($)
$ in Millions
Jun. 30, 2020
Jun. 30, 2019
Income Tax [Abstract]    
Deferred income tax asset to be recovered after more than 12 months $ 15,066 $ 12,010
Deferred income tax asset to be recovered within 12 months 869 2,071
Deferred income tax assets 15,935 14,081
Deferred income tax liability to be recovered after more than 12 months (57,334) (47,155)
Deferred income tax liability to be recovered within 12 months (2,005) (18,945)
Deferred income tax liability (59,339) (66,100)
Deferred income tax assets (liabilities), net $ (43,404) $ (52,019)