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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

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Namespace Prefix:	teo_
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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

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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

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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

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Period Type: