REGULATORY FRAMEWORK (Details)	12 Months Ended
Dec. 31, 2020
Nucleo \| License agreement for STMC and PCS, installation and provision of Internet and Data
Regulatory framework
Renewable term of license	5 years
Tuves Paraguay
Regulatory framework
Renewable term of license	5 years

Represents the renewable 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.

No definition available.

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