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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
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Main non-cash operating transactions: |  |  |
PP&E and intangible assets acquisition financed with accounts payable | $ 19,652 | $ 20,922 | $ 18,906
Dividends payment with investments not considered as cash and cash equivalents | 25,713 |  |
Accounts payable payment with CDB loan proceeds | 249 |  |
Other receivables offset with income tax liabilities | 26 |  |
Trade receivables offset with government bonds | $ 468 |  |

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- Definition The amount represents the property, plant and equipment and intangible assets acquisition financed with accounts payable. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition No definition available + References No definition available. + Details
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Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition The amount of non cash part of accounts payable payment with CDB loan proceeds. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The amount of non cash dividend payments with investments. + References No definition available. + Details
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Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition The amount of non cash other receivables offset with income tax liabilities. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition The amount of non cash other receivables offset with government bonds. + References No definition available. + Details
Name: | teo_NonCashTradeReceivablesOffsetWithGovernmentBonds
Namespace Prefix: | teo_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration