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Taxes - Summary of Tax Liabilities (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2018 | Dec. 31, 2017 | Jan. 01, 2017
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Disclosure Of Tax Liabilities [Abstract] |  |  |
Taxes and contributions on income payable | R$ 615 | R$ 1,752 |
Other Taxes and Contributions payable | 1,443 | 1,423 |
Provision for deferred income tax and social contribution (Note 24b II) | 447 | 391 | R$ (289)
Other | 2,779 | 4,270 | 3,498
Tax liabilities | R$ 5,284 | R$ 7,836 | R$ 4,950

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