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CASH AND CASH EQUIVALENTS AND INVESTMENTS. ADDITIONAL INFORMATION ON THE CONSOLIDATED STATEMENTS OF CASH FLOWS - Cash dividends (Details) $ in Millions, $ in Millions |  | 1 Months Ended | 12 Months Ended |  |  |  |
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Oct. 10, 2019 USD ($) | Oct. 10, 2019 ARS ($) | Oct. 31, 2019 ARS ($) | Aug. 31, 2019 ARS ($) | May 31, 2019 ARS ($) | Mar. 31, 2018 ARS ($) | Feb. 28, 2018 ARS ($) | Jan. 31, 2018 ARS ($) | Sep. 30, 2017 ARS ($) | Apr. 30, 2017 ARS ($) | Jan. 31, 2017 ARS ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 ARS ($) | Dec. 31, 2018 ARS ($) | Dec. 31, 2017 ARS ($) | Oct. 09, 2019 $ / $ | Apr. 30, 2019 ARS ($) | Apr. 30, 2018 ARS ($) | Mar. 31, 2017 ARS ($)
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed amount |  |  |  |  |  |  |  |  |  |  |  |  | $ 17,000 | [1],[2] | $ 44,340 | [3] | $ 4,260 | [4] |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  | 30,929 |  | 20,008 |  | 5,684 |  |  |  |  |
Amount paid in current currency |  |  |  |  |  |  |  |  |  |  |  |  | 35,528 |  | 52,339 |  | 4,014 |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 143 |  | 41 |  | 99 |  |  |  |  |
Dividends |  |  |  |  |  |  |  |  |  |  |  | $ 300 | 18,806 | [2],[5],[6] |  |  |  |  |  |  |  |
Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  | 36,068 |  | 44,620 |  | 13,533 |  |  |  |  |
Amount paid in current currency |  |  |  |  |  |  |  |  |  |  |  |  | 35,528 |  | 52,339 |  | 4,014 |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 185 |  | 86 |  | 229 |  |  |  |  |
Telecom Argentina |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Distributed amount | $ 300 | $ 17,387 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  | $ 17,387 | $ 7,045 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,300 |  |
Exchange rate of BCRA | $ / $ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 57.9 |  |  |
Anticipated cash dividends |  |  |  |  |  |  |  |  | $ 4,503 |  | $ 5,641 |  |  |  |  |  |  |  |  |  |  |
Telecom Argentina | Currency of transaction date one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  | $ 13,007 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Telecom Argentina | Currency of transaction date two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  | 6,866 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Telecom Argentina | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  | 18,806 | 8,334 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,666 |  |
Amount paid in current currency |  |  | $ 18,806 | $ 8,334 | $ 8,133 | $ 14,624 | $ 28,338 | 9,098 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Telecom Argentina | Current currency one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  | 29,020 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Telecom Argentina | Current currency two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  | $ 15,320 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ver T.V. S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 97 |  | 18 |  | 70 |  |  |  |  |
Ver T.V. S.A. | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 126 |  | 41 |  | 151 |  |  |  |  |
Teledifusora San Miguel Arcngel S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 41 |  | 8 |  | 19 |  |  |  |  |
Teledifusora San Miguel Arcngel S.A. | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 53 |  | 17 |  | 54 |  |  |  |  |
La Capital Cable S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | 5 |  | 15 |  | 10 |  |  |  |  |
La Capital Cable S.A. | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends received |  |  |  |  |  |  |  |  |  |  |  |  | $ 6 |  | $ 28 |  | 24 |  |  |  |  |
Nucleo |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 197 | $ 135 |
Nucleo | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 262 | $ 280 |
Amount paid in current currency |  |  |  |  | $ 255 | $ 279 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cablevision S.A. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,078 |  |  |  |  |
Cablevision S.A. | Currency of transaction date one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 800
Cablevision S.A. | Currency of transaction date two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 800
Cablevision S.A. | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 9,263 |  |  |  |  |
Amount paid in current currency |  |  |  |  |  |  |  |  | $ 1,928 | $ 2,076 |  |  |  |  |  |  |  |  |  |  |  |
Cablevision S.A. | Current currency one |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,130
Cablevision S.A. | Current currency two |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 2,130
CV Berazategui |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |  |
CV Berazategui | Current currency |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends approved |  |  |  |  |  |  |  |  |  | 10 |  |  |  |  |  |  |  |  |  |  |  |
Amount paid in current currency |  |  |  |  |  |  |  |  |  | $ 10 |  |  |  |  |  |  |  |  |  |  |  |
[1] | As approved by the Ordinary and Extraordinary Shareholders’ Meeting of the Company held on April 24, 2019.
[2] | Total dividends distributed for the year ended on December 31, 2019 were equivalent to $16.63 pesos per share.
[3] | As approved by the Company’s Board of Directors on January 31, 2018.Total dividends distributed were equivalent to $20.58 pesos per share.
[4] | As approved by the Ordinary and Extraordinary Shareholders’ Meeting of Cablevisión held on March 30, 2017.
[5] | As approved by the General Ordinary Shareholders’ Meeting of the Company held on October 10, 2019.
[6] | Equivalent to US$300 million paid in cash US dollars (freely available).

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