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SIGNIFICANT ACCOUNTING POLICIES - Adoption of the Amendments to IFRS 9 Financial Instruments (Details) - ARS ($) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Jan. 01, 2018 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Statement |  |  |  |
Income tax expense |  | $ (2,838) | $ 5,516 | $ 6,015
Bad debt expenses |  | 3,527 | 901 | 741
Net income |  | $ 5,536 | $ 9,859 | $ 10,546
Basic and diluted (in dollars per share) |  | $ 2.46 | $ 8.21 | $ 8.83
Equity attributable to Controlling Company |  |  |  |
Statement |  |  |  |
Net income |  | $ 5,294 | $ 9,731 | $ 10,457
Equity attributable to non-controlling interest |  |  |  |
Statement |  |  |  |
Net income |  | 242 | $ 128 | $ 89
IFRS 9 |  |  |  |
Statement |  |  |  |
Retained earnings | $ 489 |  |  |
Increase in allowance of credit losses | 982 | 722 |  |
Income tax expense | 260 | 149 |  |
Bad debt expenses |  | 496 |  |
Net income |  | (347) |  |
IFRS 9 | Cablevision Holding S.A. |  |  |  |
Statement |  |  |  |
Increase in allowance of credit losses | $ 245 |  |  |
IFRS 9 | Equity attributable to Controlling Company |  |  |  |
Statement |  |  |  |
Increase in allowance of credit losses |  | 701 |  |
Income tax expense |  | 255 |  |
Net income |  | $ (348) |  |
Basic and diluted (in dollars per share) |  | $ 0.16 |  |
IFRS 9 | Equity attributable to Controlling Company | Cablevision Holding S.A. |  |  |  |
Statement |  |  |  |
Increase in allowance of credit losses |  | $ 956 |  |
IFRS 9 | Equity attributable to non-controlling interest |  |  |  |
Statement |  |  |  |
Increase in allowance of credit losses |  | 21 |  |
Income tax expense |  | 4 |  |
IFRS 9 | Equity attributable to non-controlling interest | Cablevision Holding S.A. |  |  |  |
Statement |  |  |  |
Increase in allowance of credit losses |  | $ 25 |  |

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