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Income tax (Details) - ARS ($)
$ in Millions
12 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Income Tax [Abstract]      
Current income tax $ (1,344) $ (381) $ (1,190)
Deferred income tax 3,034 6,661 (301)
Income tax from continuing operations $ 1,690 $ 6,280 $ (1,491)