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IMPACT OF CORONAVIRUS IN TELECOM (Details) | 12 Months Ended
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Dec. 31, 2020 item
IMPACT OF CORONAVIRUS IN TELECOM |
Percentage of increase in internet services at home | 50.00%
Percentage of increase in voice mobile services | 70.00%
Percentage of increase in mobile data services | 30.00%
Percentage of increase in upstream | 75.00%
Threshold number of hospitals for which discount in service provided | 500
Threshold number of educational platforms for which discount in mobile data service provided | 2,900
Threshold number of educational institutions for which discount in services provided | 11,000
Threshold percentage of employees in home office | 70.00%
Threshold percentage of expansion of capacity for international outgoing internet traffic | 40.00%

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- Definition Threshold number of educational institutions for which discount in services was provided by the company as a result of initiative taken in response to COVID-19 emergency. + References No definition available. + Details
Name: | teo_Covid19InitiativeThresholdNumberOfEducationalInstitutionsForWhichDiscountInServicesWasProvided
Namespace Prefix: | teo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Threshold number of educational platforms for which discount in mobile data services was provided by the company as a result of initiative taken in response to COVID-19 emergency. + References No definition available. + Details
Name: | teo_Covid19InitiativeThresholdNumberOfEducationalPlatformsForWhichDiscountInMobileDataServiceWasProvided
Namespace Prefix: | teo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold number of hospitals for which discount in the services was provided by the company as a result of initiative taken in response to COVID-19 emergency. + References No definition available. + Details
Name: | teo_Covid19InitiativeThresholdNumberOfHospitalsForWhichDiscountInServiceWasProvided
Namespace Prefix: | teo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Threshold percentage of employees working from home (including those working in commercial areas and call centers), even before to the Mandatory and Preventive Social Isolation pronouncement. + References No definition available. + Details
Name: | teo_Covid19InitiativeThresholdPercentageOfEmployeesInHomeOffice
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage of expansion of the capacity for international outgoing Internet traffic. + References No definition available. + Details
Name: | teo_Covid19InitiativeThresholdPercentageOfExpansionOfCapacityForInternationalOutgoingInternetTraffic
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | teo_ImpactOfCoronaVirusAbstract
Namespace Prefix: | teo_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the percentage of increase in Internet services at home due to the pandemic. + References No definition available. + Details
Name: | teo_PercentageOfIncreaseInInternetServicesAtHome
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the percentage of increase in mobile data services due to the pandemic. + References No definition available. + Details
Name: | teo_PercentageOfIncreaseInMobileDataServices
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of increase in upstream services due to the pandemic. + References No definition available. + Details
Name: | teo_PercentageOfIncreaseInUpstream
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of increase in voice mobile services due to the pandemic. + References No definition available. + Details
Name: | teo_PercentageOfIncreaseInVoiceMobileServices
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration