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Taxes, Income Tax and Social Contribution - Summary of Tax Payable (Detail) - BRL (R$) R$ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current |  |
Social security contributions | R$ 705 | R$ 794
Non-current |  |
Total non-current liabilities | 28 | 724
Total liabilities | 733 | 1,518
Non-current |  |
Total asset | 1,087 |
ICMS [member] |  |
Current |  |
Social security contributions | 497 | 502
COFINS [member] |  |
Current |  |
Social security contributions | 126 | 128
Non-current |  |
Total non-current liabilities | 24 | 595
PASEP [member] |  |
Current |  |
Social security contributions | 27 | 28
Non-current |  |
Total non-current liabilities | 4 | 129
Social Security Contributions [member] |  |
Current |  |
Social security contributions | 20 | 25
Other Tax Authority [member] |  |
Current |  |
Social security contributions | 35 | R$ 111
Pasep and COFINS [member] |  |
Non-current |  |
Total asset | R$ 1,087 |

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