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DEFERRED INCOME TAX ASSETS/LIABILITIES - Deferred tax assets and liabilities, net (Details) - ARS ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net $ 25,282 $ 3,916
Actions for recourse tax receivable (818)  
Total deferred tax liability, net 24,464 3,916
Net deferred tax assets (78) (66)
Net deferred tax liabilities 24,542 3,982
Tax carryforward    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net (2,866) (4)
Net deferred tax assets (2,866)  
Allowance for doubtful accounts    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net (925) (269)
Provisions    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net (1,062) (396)
Inventory    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net (153)  
Pension and termination benefits    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net (235)  
PP&E and Intangible assets    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net 29,788 4,690
Cash dividends from foreign companies    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net 418  
Mobile handsets financed sales    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net 169  
Other    
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]    
Total deferred tax liabilities, net $ 148 $ (105)