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REGULATORY FRAMEWORK - Spectrum (Details) |  |  | 12 Months Ended
--- | --- | --- | ---
May 12, 2017 item | Apr. 07, 2016 claim | Dec. 31, 2019 item
Regulatory framework |  |  |
Usage period of the auctioned frequency bands |  |  | 15 years
Number of licensees for subscription television services |  |  | 2
Minimum |  |  |
Regulatory framework |  |  |
Number of Inhabitants |  |  | 500
Maximum |  |  |
Regulatory framework |  |  |
Number of Inhabitants |  |  | 10,000
3687-E/2017 | Minimum |  |  |
Regulatory framework |  |  |
Frequency band awarded, one (in MHz) | 2,500 |  |
3687-E/2017 | Maximum |  |  |
Regulatory framework |  |  |
Frequency band awarded, one (in MHz) | 2,690 |  |
Adesol |  |  |
Regulatory framework |  |  |
Term of the license agreement |  |  | 15 years
Number of unconstitutionality claims | claim |  | 28 |

X
- Definition Represents the period of usage for the auctioned frequency bands awarded, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
Name: | teo_AuctionedFrequencyBandsUsagePeriod
Namespace Prefix: | teo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | teo_DisclosureOnRegulatoryFrameworkLineItems
Namespace Prefix: | teo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the first frequency band awarded to the company by the SC. + References No definition available. + Details
Name: | teo_FrequencyBandAwardedOne
Namespace Prefix: | teo_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of inhabitants in the locality who will receive SRMC, STM and PCS. + References No definition available. + Details
Name: | teo_NumberOfInhabitants
Namespace Prefix: | teo_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of licensees providing subscription television services. + References No definition available. + Details
Name: | teo_NumberOfLicenseesProvidingSubscriptionTelevisionServices
Namespace Prefix: | teo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of unconstitutionality claims. + References No definition available. + Details
Name: | teo_NumberOfUnconstitutionalityClaims
Namespace Prefix: | teo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the term of the license agreement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but not limited to, weeks in a year or quarter. + References No definition available. + Details
Name: | teo_TermOfLicenseAgreement
Namespace Prefix: | teo_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | teo_ScResolutionNumbersAxis=teo_ScResolutionNumber3687e17Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_SignificantInvestmentsInSubsidiariesAxis=teo_AdesolMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |