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Income and Social Contribution Taxes - Summary of Tax Incentives (Detail) | 12 Months Ended
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Dec. 31, 2018
Bahiana Distribuidora De Gas Ltda [member] | Aracaju Base [member] |
Summary of income and social contribution taxes [line items] |
Subsidiary | Bahiana Distribuidora de Gás Ltda.
Business Units | Aracaju base
Incentive - % | 75.00%
Expiration | 2028
Bahiana Distribuidora De Gas Ltda [member] | Suape Base [member] |
Summary of income and social contribution taxes [line items] |
Business Units | Suape base
Incentive - % | 75.00%
Expiration | 2018
Bahiana Distribuidora De Gas Ltda [member] | Mataripe Base [member] |
Summary of income and social contribution taxes [line items] |
Business Units | Mataripe base
Incentive - % | 75.00%
Expiration | 2024
Bahiana Distribuidora De Gas Ltda [member] | Caucaia Base [member] |
Summary of income and social contribution taxes [line items] |
Business Units | Caucaia base
Incentive - % | 75.00%
Expiration | 2025
Bahiana Distribuidora De Gas Ltda [member] | Juazeiro base [member] |
Summary of income and social contribution taxes [line items] |
Business Units | Juazeiro base
Incentive - % | 75.00%
Expiration | 2026
Terminal Quimico De Aratu SATequimar [member] | Aratu Terminal [member] |
Summary of income and social contribution taxes [line items] |
Subsidiary | Terminal Químico de Aratu S.A. - Tequimar
Business Units | Suape terminal
Incentive - % | 75.00%
Expiration | 2020
Terminal Quimico De Aratu SATequimar [member] | Itaqui Terminal [member] |
Summary of income and social contribution taxes [line items] |
Business Units | Aratu terminal
Incentive - % | 75.00%
Expiration | 2022
Oleoquímica Industriae Comércio De Produtos Químicos Ltda [member] | Camacari Plant [member] |
Summary of income and social contribution taxes [line items] |
Subsidiary | Oleoquímica Indústria e Comércio de Produtos Químicos Ltda.
Business Units | Camaçari plant
Incentive - % | 75.00%
Expiration | 2021
Oxiteno Nordeste SAIndustriae Comércio [member] | Camacari Plant [member] |
Summary of income and social contribution taxes [line items] |
Subsidiary | Oxiteno Nordeste S.A. Indústria e Comércio
Business Units | Camaçari plant
Incentive - % | 75.00%
Expiration | 2026
Empresa Carioca de Produtos Quimicos S A [member] | Camacari Plant [member] |
Summary of income and social contribution taxes [line items] |
Subsidiary | Empresa Carioca de Produtos Químicos S.A.
Business Units | Camaçari plant
Incentive - % | 75.00%
Expiration | 2026

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