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DEFERRED INCOME TAX ASSETS/LIABILITIES - Maturities of estimated tax carryforward (Details) - ARS ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Deferred tax assets $ 293 $ 120
Tax carryforward amount 28,700  
Deferred tax asset 53,129 38,894
Tax carryforward    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Deferred tax asset (8,590) $ (4,408)
Telecom Argentina | Tax Year 2018    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Tax carryforward amount 15,765  
Telecom Argentina | Tax Year 2019    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Tax carryforward amount 12,525  
Inter Radios | Tax Year 2015    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Tax carryforward amount 6  
Inter Radios | Tax Year 2017    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Tax carryforward amount 2  
Inter Radios | Tax Year 2018    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Tax carryforward amount 2  
Adesol | Tax Year 2019    
DEFERRED INCOME TAX ASSETS/LIABILITIES    
Tax carryforward amount $ 400