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INCOME AND SOCIAL CONTRIBUTION TAXES - Estimated recovery and reversal of income and social contributions tax assets and liabilities (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
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Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets | R$ 4,071,219 | R$ 3,874,054 | R$ 3,054,393 | R$ 3,407,230
Non-current liabilities | (517,413) | (118,368) | R$ (82,686) | R$ (395,436)
Next 12 months |  |  |  |
Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets |  | 609,546 |  |
Non-current liabilities |  | (18,055) |  |
Year Two |  |  |  |
Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets | 605,657 | 585,047 |  |
Non-current liabilities |  | (25,144) |  |
Year Three |  |  |  |
Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets | 467,153 | 338,896 |  |
Non-current liabilities | (98,449) | (13,548) |  |
Year Four |  |  |  |
Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets | 422,863 | 306,130 |  |
Non-current liabilities | (110,031) | (14,009) |  |
Year Five |  |  |  |
Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets | 464,514 | 373,875 |  |
Non-current liabilities | (90,703) | (11,210) |  |
More than 5 years |  |  |  |
Deferred income and social contribution tax assets and liabilities at statutory tax rates |  |  |  |
Non-current assets | 2,111,032 | 1,660,560 |  |
Non-current liabilities | R$ (218,230) | R$ (36,402) |  |

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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_o&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_56&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amounts of income taxes payable in future periods in respect of taxable temporary differences. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_o&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_56&doctype=Standard -URIDate 2019-03-27 + Details
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