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SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2020 ARS ($) | Dec. 31, 2019 ARS ($)
Significant accounting policies |  |  |
Impairment of Intangible assets | $ 448 | $ 568 |
Other fixed assets impairment |  |  | $ 866
Net of reversal | 169 |  |
Argentinas |  |  |
Significant accounting policies |  |  |
Impairment of goodwill | 89 |  |
Abroad |  |  |
Significant accounting policies |  |  |
Impairment of goodwill | $ 578 |  |
Minimum |  |  |
Significant accounting policies |  |  |
Average useful life of leased assets | 1 year |  |
Maximum |  |  |
Significant accounting policies |  |  |
Average useful life of leased assets | 6 years |  |
Incremental Costs from the Acquisition of Contracts |  |  |
Significant accounting policies |  |  |
Average period for amortization | 2 years |  |
3G/4G licenses |  |  |
Significant accounting policies |  |  |
Average period for amortization | 180 months |  |
Nucleo's licenses - PCS |  |  |
Significant accounting policies |  |  |
Average period for amortization | 60 months |  |
Nucleo's licenses - 700 MHz-band spectrum |  |  |
Significant accounting policies |  |  |
Average period for amortization | 10 years |  |
Nucleo's Internet And Data Transmission |  |  |
Significant accounting policies |  |  |
Average period for amortization | 5 years |  |
Fixed-telephony customers |  |  |
Significant accounting policies |  |  |
Amortized over the estimated term | 10 years |  |
Spectrum |  |  |
Significant accounting policies |  |  |
Impairment of Intangible assets |  |  | $ 4,403
Other Exclusivity Rights, Rights of Use | Minimum |  |  |
Significant accounting policies |  |  |
Average period for amortization | 2 years |  |
Other Exclusivity Rights, Rights of Use | Maximum |  |  |
Significant accounting policies |  |  |
Average period for amortization | 28 years |  |
Argentina | Mobile telephony customers |  |  |
Significant accounting policies |  |  |
Amortized over the estimated term | 6 years |  |
Paraguay | Mobile telephony customers |  |  |
Significant accounting policies |  |  |
Amortized over the estimated term | 5 years |  |

X
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