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25. Insurance (Details) R$ in Thousands | Dec. 31, 2017 BRL (R$)
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SummaryOfInsuranceLineItems [Line Items] |
Coverage | R$ 3,140,279
Specified risks - fire |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 2,007,219
Engineering risk |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 1,043,368
Guarantee insurance for escrow deposit |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 500
Traditional guarantee insurance |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 100
Civil liability- DO (Directors and Officers) |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 100
Civil liability- works |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 85,530
Domestic and international transportation |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 448
Civil liability - operations |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | 3,000
Other |
SummaryOfInsuranceLineItems [Line Items] |
Coverage | R$ 14

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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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Data Type: | na
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Data Type: | na
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Data Type: | na
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Data Type: | na
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Data Type: | na
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Namespace Prefix: |
Data Type: | na
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