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Financial Instruments and Risk Management - Summary of Derivative Instruments Contracted (Parenthetical) (Detail) | 12 Months Ended
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Dec. 31, 2017 BRL (R$)
Derivative financial instruments [Abstract] |
Swap operation floor rate | R$ 3.25
Swap ceiling rate | R$ 5
FX Variation Interest rate | 9.25%

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- Definition Derivative financial instruments [Abstract] + References No definition available. + Details
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- Definition FX Variation Interest rate + References No definition available. + Details
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- Definition Swap ceiling rate + References No definition available. + Details
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- Definition Swap operation floor rate + References No definition available. + Details
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