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Revenues (Details) - ARS ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Disclosure of Revenue      
Total Services revenues $ 56,971 $ 45,354 $ 34,480
Inbound      
Revenue from sale of telecommunication equipment 8,215 7,886 6,016
Revenue from sale of equipment and rendering of services 65,186 53,240 40,496
Other income 133 83 44
Revenue from sale of equipment, rendering of services and other income 65,319 53,323 40,540
Gain on disposal of property, plant and equipment 21 17 31
Fixed services      
Disclosure of Revenue      
Revenue from voice service 8,505 6,010 4,338
Revenue from internet service 7,715 5,994 4,557
Revenue from data service 3,577 2,919 1,780
Total Services revenues 19,797 14,923 10,675
Inbound      
Revenue from sale of telecommunication equipment 663 91 61
Other income 71 66 39
Personal Mobile Services      
Disclosure of Revenue      
Total Services revenues 34,289 28,049 22,258
Outbound      
Postpaid 8,380 6,951 5,401
Abono Fijo 13,241 10,365 7,919
Prepaid 8,359 7,548 6,345
Total Outbound 29,980 24,864 19,665
Inbound      
From Fixed Services - CPP 1,012 779 624
From Mobile Services - TLRD 1,698 932 924
Total Inbound 2,710 1,711 1,548
Others 1,599 1,474 1,045
Revenue from sale of telecommunication equipment 7,446 7,535 5,796
Other income 62 16 5
Nucleo Mobile Services      
Disclosure of Revenue      
Total Services revenues 2,885 2,382 1,547
Outbound      
Postpaid 81 62 36
Abono Fijo 999 766 458
Prepaid 1,445 1,134 742
Total Outbound 2,525 1,962 1,236
Inbound      
From Mobile Services - TLRD 133 118 80
From Fixed Services - Interconnection 8 9 9
Total Inbound 141 127 89
Others 219 293 222
Revenue from sale of telecommunication equipment $ 106 260 $ 159
Other income   $ 1