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OPERATING EXPENSES - Other operating expenses (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
OPERATING EXPENSES      
Provisions $ (1,286) $ (1,929) $ (552)
Rentals and internet capacity (1,992) (5,109) (1,725)
Other (7,896) (7,846) (2,717)
Other operating expenses $ (11,174) $ (14,884) $ (4,994)