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v3.19.1

Commitments - Additional Information (Detail) R$ in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 BRL (R$) R$ / Ton Ton | Dec. 31, 2017 BRL (R$) | Dec. 31, 2016 BRL (R$) | Dec. 31, 2018 USD ($) R$ / Ton
Disclosure of commitments and contingencies [line items] |  |  |  |
Minimum annual consumption level of ethylene | Ton | 205,000 |  |  |
Minimum purchase of ethylene annually | Ton | 44,100 |  |  |
Operating lease expense | R$ | R$ 189,008 | R$ 160,465 | R$ 101,330 |
Aratu [member] |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |
Cargo rates per ton | R$ / Ton | 6.99 |  |  | 6.99
Suape [member] |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |
Cargo rates per ton | R$ / Ton | 2.54 |  |  | 2.54
Third parties [member] |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |
Liability insurance policies | R$ 1,550,000 |  |  | $ 400
directors and executive officers (D&O) [member] |  |  |  |
Disclosure of commitments and contingencies [line items] |  |  |  |
Liability insurance policies | R$ 310,000 |  |  | $ 80

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