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GOODWILL - Changes in Goodwill (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Changes in goodwill |  |  |
Goodwill at beginning of the year | R$ 9,469,311 | R$ 9,112,390 | R$ 7,891,142
Foreign exchange effect | 2,634,208 | 356,921 | 1,221,248
Impairment | 0 | 0 | 0
Goodwill at end of the year | 12,103,519 | 9,469,311 | 9,112,390
Gross |  |  |
Changes in goodwill |  |  |
Goodwill at beginning of the year | 17,445,205 | 16,783,958 | 14,500,381
Foreign exchange effect | 4,976,383 | 661,247 | 2,283,577
Goodwill at end of the year | 22,421,588 | 17,445,205 | 16,783,958
Accumulated impairment losses |  |  |
Changes in goodwill |  |  |
Goodwill at beginning of the year | (7,975,894) | (7,671,568) | (6,609,239)
Foreign exchange effect | (2,342,175) | (304,326) | (1,062,329)
Goodwill at end of the year | R$ (10,318,069) | R$ (7,975,894) | R$ (7,671,568)

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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_a&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2020-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_135_a&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_c&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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- Definition The increase (decrease) in goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2020-01-01 -Paragraph B67 -Subparagraph d -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d_vi&doctype=Appendix&subtype=B -URIDate 2020-01-01 + Details
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