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

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_NotionalAmount
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2017-01-01
-Paragraph B64
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2017-03-01&anchor=para_B64_c&doctype=Appendix&seq=2
-URIDate 2017-03-09

Name:	ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

Ratio applied to determine the number of instruments or interests issued or issuable at acquisition date for equity interests of the acquirer transferred as consideration in a business combination.

No definition available.

Name:	teo_NumberOfInstrumentsOrInterestsIssuedOrIssuableConversionRatio
Namespace Prefix:	teo_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

The period of time an option contract can be executed.

No definition available.

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

The percentage of additional indirect shares received under terms of call option.

No definition available.

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

The percentage of additional shares received under terms of call option.

No definition available.

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

The percentage of participation equity interests acquirable under terms of call option.

No definition available.

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

The percentage of equity interests acquirable under terms of call option.

No definition available.

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

Represents full option price paid in advance.

No definition available.

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

Represents the amount paid for entity's shares in excess of nominal value.

No definition available.

Name:	teo_SharePremiumPaid
Namespace Prefix:	teo_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Name:	ifrs-full_CounterpartiesAxis=teo_CablevisionHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=teo_PurchasedCallOptionsTelecomArgentinaEquityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_CounterpartiesAxis=teo_VlgArgentinaLlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=teo_TelecomArgentinaS.a.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_BusinessCombinationsAxis=teo_CablevisionHoldingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	dei_LegalEntityAxis=teo_FintechAdvisoryIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

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