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DEFERRED INCOME TAX ASSETS/LIABILITIES - Income tax (expense) benefit (Details) - ARS ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
DEFERRED INCOME TAX ASSETS/LIABILITIES      
Current tax expense $ (161)   $ (7,414)
Deferred tax benefit (14,009) $ 4,366 (1,072)
Income tax (expense) benefit $ (14,170) $ 4,366 $ (8,486)