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GOODWILL (Details) - ARS ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Goodwill    
Goodwill $ 120,449 $ 31,954
Argentina    
Goodwill    
Goodwill 119,678 31,273
Argentina | Merger between Telecom and Cablevision    
Goodwill    
Goodwill 88,068  
Argentina | Cablevision    
Goodwill    
Goodwill 31,606  
Argentina | Tuves Paraguay    
Goodwill    
Goodwill 4  
Uruguay    
Goodwill    
Goodwill $ 771 $ 681