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EQUITY - Share Ownership Plan (Details) - Class "C" |  |  | 1 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Oct. 15, 2019 shares | Dec. 15, 2011 tranche shares | Dec. 31, 2011 tranche shares | Dec. 31, 2019 shares | Apr. 27, 2006 shares | Mar. 31, 2000 shares
Share Ownership Plan |  |  |  |  |  |
Capital Stock to be included in PPP (as a percent) |  |  |  | 10.00% |  |
Capital Stock to be included in PPP (in shares) |  |  |  | 98,438,098 |  |
Conversion of shares, number of shares authorized |  | 4,593,274 | 4,593,274 |  | 41,339,464 | 52,505,360
Conversion of shares, number of shares converted | 97,688 | 4,382,408 | 41,339,464 |  |  |
Number of tranches | tranche |  | 11 | 11 |  |  |
Number of shares held for conversion |  |  |  | 113,178 |  |

X
- Definition Represents the percentage of capital stock that should be included in Represents the number of shares that should be included in employee share ownership program sponsored by the Argentine government, as per the decree. + References No definition available. + Details
Name: | teo_CapitalStockToBeIncludedInEmployeeShareOwnershipProgramNumberOfShares
Namespace Prefix: | teo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the percentage of capital stock that should be included in employee share ownership program sponsored by the Argentine government, as per the decree. + References No definition available. + Details
Name: | teo_CapitalStockToBeIncludedInEmployeeShareOwnershipProgramPercentage
Namespace Prefix: | teo_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the number of shares that are authorized for conversion. + References No definition available. + Details
Name: | teo_IfrsConversionOfStockSharesAuthorized
Namespace Prefix: | teo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References No definition available. + Details
Name: | teo_IfrsConversionOfStockSharesConverted1
Namespace Prefix: | teo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents number of shares held for conversion. + References No definition available. + Details
Name: | teo_NumberOfSharesHeldForConversion
Namespace Prefix: | teo_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents number of tranches in which the shares were converted. + References No definition available. + Details
Name: | teo_NumberOfTranches
Namespace Prefix: | teo_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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

X
- Details
Name: | ifrs-full_ClassesOfOrdinarySharesAxis=teo_ClassCOrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |