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EQUITY - Summary (Details) - ARS ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Jan. 01, 2018
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EQUITY |  |  |  |
Equity attributable to Controlling Company | $ 382,456 | $ 415,335 |  |
Equity attributable to non-controlling interest | 6,399 | 6,492 |  |
Total equity | $ 388,855 | $ 421,827 | $ 479,417 | $ 115,249

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