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INCOME AND SOCIAL CONTRIBUTION TAXES - Reconciliation of effects of income tax and social contribution on profit or loss (Details) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Reconciliation of the effects of income tax and social contribution on profit or loss |  |  |
Loss before taxes | R$ (17,642,129) | R$ (4,097,203) |
Income tax and social contribution benefit (expense) at statutory nominal rate of 34% | R$ 5,998,324 | R$ 1,393,049 |
Tax rate | 34.00% | 34.00% |
Tax effect on permanent differences |  |  |
Taxation (difference) on profit of wholly-owned subsidiaries abroad | R$ 1,373,845 | R$ (24,933) |
Equity method | 12,288 | 10,878 |
Thin capitalisation | (675,356) | (95,003) |
Credit related to Reintegrate Program | 6,278 | 4,515 |
Tax incentives applicable to income tax | 10,668 | 18,919 |
Director bonus | (7,677) | (43,913) |
Offset income tax abroad | 72,890 |  |
Merger of subsidiaries | 67,311 |  |
Donations / Fines - Other | 68,623 | 18,949 |
Income and social contribution benefits (expenses) on the period | 6,927,194 | 1,282,461 | R$ (154,516)
Income tax |  |  |
Current | (173,322) | (220,311) |
Deferred | 5,225,655 | 1,093,200 |
Total income Tax | 5,052,333 | 872,889 |
Social Contribution |  |  |
Current | (8,604) | (25,799) |
Deferred | 1,883,465 | 435,371 |
Total Social Contribution | 1,874,861 | 409,572 |
Income and social contribution benefits (expenses) on the period | R$ 6,927,194 | R$ 1,282,461 | R$ (154,516)
Effective rate of income and social contribution tax expenses | 39.27% | 31.30% |

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2020-01-01 + Details
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