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19. Provisions (Details 2) - BRL (R$) R$ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | R$ 8,231,000 | R$ 7,432,100
Customer claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 219,900 | 306,500
Supplier claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 1,430,600 | 1,422,000
Other civil claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 733,100 | 709,400
Tax claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 1,291,000 | 1,143,000
Labor claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 677,400 | 533,600
Environmental claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | R$ 3,879,000 | R$ 3,317,600

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