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, 2019	Dec. 31, 2018
Main non-cash operating transactions:
PP&E and intangible assets acquisition financed with accounts payable	$ 16,384	$ 13,887

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

No definition available.

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