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20. Provisions (Details 2) - BRL (R$) R$ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | ---
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | R$ 8,793,100 | R$ 8,231,000
Customer claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 207,600 | 219,900
Supplier claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 1,459,100 | 1,430,600
Other civil claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 719,300 | 733,100
Tax claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 1,439,100 | 1,291,000
Labor claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | 624,200 | 677,400
Environmental claims |  |
SummaryOfProvisionsLineItems [Line Items] |  |
Significant contingent liabilities | R$ 4,343,800 | R$ 3,879,000

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- Definition The amount of contingent liabilities incurred relating to the entity's interests in associates. [Refer: Associates [member]; Contingent liabilities [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph 23 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_23_b&doctype=Standard -URIDate 2018-03-16 + Details
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