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Income and Social Contribution Taxes - Summary of Reconciliation of Taxes (Detail) - BRL (R$) R$ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income and social contribution taxes details 4 [abstract] |  |  |
Income before taxes and share of profit (loss) of subsidiaries, joint ventures, and associates | R$ 793,698 | R$ 1,785,818 | R$ 2,318,446
Statutory tax rates | 34.00% | 34.00% | 34.00%
Income and social contribution taxes at the statutory tax rates | R$ (269,857) | R$ (607,178) | R$ (788,272)
Adjustments to the statutory income and social contribution taxes: |  |  |
Nondeductible expenses | (68,795) | (82,784) | (105,017)
Nontaxable revenues | 28,235 | 32,523 | 19,084
Adjustment to estimated income | 10,511 | 9,706 | 10,844
Interest on equity | 0 | (538) | (550)
Contribution Taxes Carryforwards deferred | (146,820) | (95,480) |
Other adjustments | 24,873 | (2,634) | 2,059
Income and social contribution taxes before tax incentives | (421,853) | (746,385) | (861,852)
Tax incentives—SUDENE | 43,244 | 107,666 | 48,598
Income and social contribution taxes in the income statement | (378,609) | (638,719) | (813,254)
Current | (476,074) | (476,302) | (922,458)
Deferred | R$ 97,465 | R$ (162,417) | R$ 109,204
Effective IRPJ and CSLL rates | 47.70% | 35.80% | 35.10%

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- Definition The amount of income taxes payable (recoverable) in respect of the taxable profit (tax loss) for a period. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 80 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_80_a&doctype=Standard -URIDate 2019-03-27 + Details
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