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Note 27 - Financial Instruments and Risks (Details Textual) - BRL (R$) R$ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Statement Line Items [Line Items] |  |  |  |
Value at risk exposure, probable |  | 95.00% |  |
Value at risk, duration |  | 21 days |  |
Value at risk, adverse scenario, deterioration percentage |  | 25.00% |  |
Value at risk, remote scenario, deterioration percentage |  | 50.00% |  |
Total gains (losses) on financial assets at fair value through profit or loss |  | R$ 227.6 | R$ 247.5 | R$ 261.4
Guarantees held for derivative instruments | R$ 608.3 | 608.3 | R$ 486.8 |
Swap contract [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Total gains (losses) on financial assets at fair value through profit or loss | 67.0 |  |  |
Equity price risk [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Risk exposure associated with instruments sharing characteristic | R$ 2,300.0 | R$ 2,300.0 |  |
Bottom of range [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Trigger clause percentage, credit risk |  | 10.00% |  |
Top of range [member] |  |  |  |
Statement Line Items [Line Items] |  |  |  |
Trigger clause percentage, credit risk |  | 15.00% |  |

X
- Definition The amount of guarantees held for derivative instrument requirements. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The trigger clause percentage comparing the fair value of an operational to the notional value. + References No definition available. + Details
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- Definition The value at risk under an adverse scenario relating to the deterioration percentage. + References No definition available. + Details
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- Definition The number of days under the Value at Risk exposure. + References No definition available. + Details
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- Definition The percentage range for potential exposure under a probable scenario using Value at Risk. + References No definition available. + Details
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- Definition The value at risk under a remote scenario relating to the deterioration percentage. + References No definition available. + Details
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- Definition The gains (losses) on financial assets at fair value through profit or loss. [Refer: Financial assets at fair value through profit or loss] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 20 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_20_a_i&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph B8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_B8_c&doctype=Appendix&seq=2 -URIDate 2017-03-09 + Details
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- Details
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- Details
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- Details
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