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OPERATING EXPENSES - Other operating income and expenses (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
OPERATING EXPENSES      
Provisions $ (1,254) $ (359) $ (348)
Rentals and internet capacity (3,321) (1,121) (862)
Other (5,100) (1,766) (1,915)
Other operating income and expenses $ (9,675) $ (3,246) $ (3,125)