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Note 30 - Contingent Liability - Estimates of Amounts of Possible Losses (Details) - BRL (R$) R$ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | R$ 60,520.0 | R$ 52,450.5
IRPJ and CSLL tax contingent liability [member] |  |
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | 31,757.3 | 28,934.8
PIS and COFINS tax contingent liability [member] |  |
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | 3,485.2 | 1,971.1
ICMS and IPI contingent liability [member] |  |
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | 19,805.5 | 16,046.9
Labor contingent liability [member] |  |
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | 287.1 | 222.0
Legal proceedings contingent liability [member] |  |
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | 4,071.5 | 4,417.6
Other contingent liabilities [member] |  |
Statement Line Items [Line Items] |  |
Estimates of amounts of possible losses | R$ 1,113.4 | R$ 858.1

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