Name:	ifrs-full_DisclosureOfOtherProvisionsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The losses on settlements of litigation.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 98
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_f&doctype=Standard
-URIDate 2018-03-16

Name:	ifrs-full_LossesOnLitigationSettlements
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The adjusted amount of subscription price.

No definition available.

Name:	teo_AdjustedSubscriptionPrice
Namespace Prefix:	teo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of capital increase due to revocation of injunction.

No definition available.

Name:	teo_IncreaseInCapitalDueToRevocationOfInjunction
Namespace Prefix:	teo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Represents the maximum percentage of services invoiced, that the mobile operators are entitled to receive on behalf and to the order of providers of audiotext and mass calling Value Added Services.

No definition available.

Name:	teo_MaximumPercentageOfServicesInvoicedThatMobileOperatorsAreEntitledToReceive
Namespace Prefix:	teo_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the number of companies that initiated a claim.

No definition available.

Name:	teo_NumberOfCompaniesThatInitiatedClaim
Namespace Prefix:	teo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the number of legal actions filed by trade unions.

No definition available.

Name:	teo_NumberOfLegalActionsFiledByTradeUnions
Namespace Prefix:	teo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the total number of legal actions that will continue within the Federal Civil and Commercial Court.

No definition available.

Name:	teo_NumberOfLegalActionsWithinFederalCivilAndCommercialCourt
Namespace Prefix:	teo_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Represents the period preceding the date of lawsuit, to be considered for crediting the customers for unused minutes on expired prepaid cards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	teo_NumberOfYearsToBeConsideredForCreditingCustomersForUnusedMinutesOnExpiredPrepaidCards
Namespace Prefix:	teo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the period preceding the date of lawsuit, to be considered for reimbursement of excess amount collected from customers, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	teo_NumberOfYearsToBeConsideredForReimbursementOfExcessAmountCollected
Namespace Prefix:	teo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The amount of penalty imposed for not complying with information regime.

No definition available.

Name:	teo_PenaltyImposedForNotComplyingWithInformationRegime
Namespace Prefix:	teo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Represents the period considered for the reimbursement of increased price billed to customer, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	teo_PeriodConsideredForReimbursementOfIncreasedPriceBilledToCustomer
Namespace Prefix:	teo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The period during which amounts collected for internet and cable services.

No definition available.

Name:	teo_PeriodDuringWhichAmountsCollectedForInternetAndCableServices
Namespace Prefix:	teo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The period of default made for union contributions and payments.

No definition available.

Name:	teo_PeriodOfDefaultForUnionContributionsAndPayments
Namespace Prefix:	teo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the period to file interconnection contracts under the ENACOM, or the addenda to the existing ones, that ensure adjustments to the contracts already in force and with relation to the services rendered by the members of CAVAM, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	teo_PeriodToFileInterConnectionContracts
Namespace Prefix:	teo_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

The amount of reduced penalty for not complying with information regime.

No definition available.

Name:	teo_ReducedPenaltyForNotComplyingWithInformationRegime
Namespace Prefix:	teo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

The amount of capital reduced due to revocation of injunction.

No definition available.

Name:	teo_ReductionOfCapitalDueToRevocationOfInjunction
Namespace Prefix:	teo_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Name:	srt_LitigationCaseAxis=teo_RadioelectricSpectrumFeesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_LitigationCaseAxis=teo_TradeUnionsForUnionContributionsAndPaymentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_LitigationCaseAxis=teo_SecretariatOfDomesticTradeOfNationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_LitigationCaseAxis=teo_ClaimsBetweenSupercanalHoldingS.a.AndCablevisionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_LitigationCaseAxis=teo_AsociacionPorLaDefensaDeUsuariosYConsumidoresMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_SignificantInvestmentsInSubsidiariesAxis=teo_PersonalMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfContingentLiabilitiesAxis=ifrs-full_LegalProceedingsContingentLiabilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_LitigationCaseAxis=teo_ConsumidoresFinancierosAsociacionCivilParaSuDefensaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	srt_LitigationCaseAxis=teo_ChangesInServicePricesCaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: