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INTANGIBLE ASSETS - Movements in impairment of Intangible assets (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Intangible assets    
Value, at the beginning of the year $ 91,474  
Value, at the end of the year 82,608 $ 91,474
Accumulated impairment    
Intangible assets    
Value, at the beginning of the year (2,498)  
Additions (2,143) (2,498)
Value, at the end of the year $ (4,641) $ (2,498)