BALANCES AND TRANSACTIONS WITH COMPANIES UNDER SECTION 33 - LAW No. 19,550 AND RELATED PARTIES - Controlling Company (Details) - Telecom Argentina - shares		12 Months Ended
Apr. 15, 2019	Dec. 31, 2020
Cablevision Holding S.A.
Related party balances and transactions
Ownership percentage by parent		28.16%
VLG S.A.U. and Fintech Telecom, LLC
Related party balances and transactions
Ownership percentage by parent		21.84%
Percentage of shares contributed in voting trust		10.92%
Fintech and CVH
Related party balances and transactions
CVH equity interest in Telecom in excess	50.00%
Number of shares contributed in voting trust	235,177,350

The proportion of ownership interest in a subsidiary attributable to the entity. [Refer: Subsidiaries [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 17
-Subparagraph b
-Clause iii
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-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 27
-IssueDate 2020-01-01
-Paragraph 16
-Subparagraph b
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=27&code=ifrs-tx-2020-en-r&anchor=para_16_b_iii&doctype=Standard
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph 19B
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_19B_c&doctype=Standard
-URIDate 2020-01-01

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