CASH AND CASH EQUIVALENTS AND INVESTMENTS. ADDITIONAL INFORMATION ON THE CONSOLIDATED STATEMENTS OF CASH FLOWS - Main non-cash operating transactions (Details) - ARS ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Main non-cash operating transactions:
PP&E and intangible assets acquisition financed with accounts payable	$ 20,609	$ 29,663	$ 31,580
Dividends payment with investments not considered as cash and cash equivalents	40,020	38,809
Accounts payable payment with CDB loan proceeds	8,138	376
Trade receivables offset with government bonds	2,355	706
Social security payables offset with government bonds	1,316
Other receivables offset with income tax liabilities	$ 73	$ 39

The amount represents the property, plant and equipment and intangible assets acquisition financed with accounts payable.

No definition available.

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

No definition available

No definition available.

Name:	teo_CashFlowNoncashOperatingActivitiesAbstract
Namespace Prefix:	teo_
Data Type:	xbrli:stringItemType
Balance Type:	na
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The amount of non cash part of accounts payable payment with CDB loan proceeds.

No definition available.

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

The amount of non cash dividend payments with investments.

No definition available.

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

The amount of non cash other receivables offset with income tax liabilities.

No definition available.

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

The amount of non-cash part of social security payables offset with government bonds.

No definition available.

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

The amount of non cash other receivables offset with government bonds.

No definition available.

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