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Note 27 - Financial Instruments and Risks - Fair Value Hierarchy (Details) - BRL (R$) R$ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Statement Line Items [Line Items] |  |  |
Financial asset at fair value through profit or loss |  | R$ 11.9 | R$ 282.8
Derivatives assets at fair value through profit or loss |  | 100.1 | 18.4
Derivatives - operational hedge |  | 285.1 | 194.5
|  | 397.1 | 495.7
Financial liabilities at fair value through profit and loss (i) | [1] | 5,764.1 | 5,106.1
Derivatives liabilities at fair value through profit or loss |  | 16.1 | 49.9
Derivatives liabilities - operational hedge |  | 201.4 | 654.8
Derivatives liabilities - fair value hedge |  |  | 8.7
|  | 5,981.6 | 5,819.5
Level 1 of fair value hierarchy [member] |  |  |
Statement Line Items [Line Items] |  |  |
Financial asset at fair value through profit or loss |  | 11.9 | 282.8
Derivatives assets at fair value through profit or loss |  | 0.1 | 2.6
Derivatives - operational hedge |  | 4.8 | 83.6
|  | 16.8 | 369.0
Financial liabilities at fair value through profit and loss (i) | [1] |  |
Derivatives liabilities at fair value through profit or loss |  | 1.7 | 9.9
Derivatives liabilities - operational hedge |  | 58.4 | 78.9
Derivatives liabilities - fair value hedge |  |  |
|  | 60.1 | 88.8
Level 2 of fair value hierarchy [member] |  |  |
Statement Line Items [Line Items] |  |  |
Financial asset at fair value through profit or loss |  |  |
Derivatives assets at fair value through profit or loss |  | 100.0 | 15.8
Derivatives - operational hedge |  | 280.3 | 110.9
|  | 380.3 | 126.7
Financial liabilities at fair value through profit and loss (i) | [1] |  |
Derivatives liabilities at fair value through profit or loss |  | 14.4 | 40.0
Derivatives liabilities - operational hedge |  | 143.0 | 575.9
Derivatives liabilities - fair value hedge |  |  | 8.7
|  | 157.4 | 624.6
Level 3 of fair value hierarchy [member] |  |  |
Statement Line Items [Line Items] |  |  |
Financial asset at fair value through profit or loss |  |  |
Derivatives assets at fair value through profit or loss |  |  |
Derivatives - operational hedge |  |  |
Financial liabilities at fair value through profit and loss (i) | [1] | 5,764.1 | 5,106.1
Derivatives liabilities at fair value through profit or loss |  |  |
Derivatives liabilities - operational hedge |  |  |
Derivatives liabilities - fair value hedge |  |  |
|  | R$ 5,764.1 | R$ 5,106.1
[1] | Refers to the put option granted on subsidiary as described in Note 21 d(4).

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- Definition The fair value of financial assets. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of financial assets that are measured at fair value and for which gains (losses) are recognised in profit or loss. A financial asset shall be measured at fair value through profit or loss unless it is measured at amortised cost or at fair value through other comprehensive income. A gain (loss) on a financial asset measured at fair value shall be recognised in profit or loss unless it is part of a hedging relationship, it is an investment in an equity instrument for which the entity has elected to present gains and losses in other comprehensive income or it is a financial asset measured at fair value through other comprehensive income. [Refer: At fair value [member]; Financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 8 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_8_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of financial liabilities that meet either of the following conditions: (a) they meet the definition of held for trading; or (b) upon initial recognition they are designated by the entity as at fair value through profit or loss. An entity may use this designation only when permitted by paragraph 4.3.5 of IFRS 9 (embedded derivatives) or when doing so results in more relevant information, because either: (a) it eliminates or significantly reduces a measurement or recognition inconsistency (sometimes referred to as ‘an accounting mismatch’) that would otherwise arise from measuring assets or liabilities or recognising the gains and losses on them on different bases; or (b) a group of financial liabilities or financial assets and financial liabilities is managed and its performance is evaluated on a fair value basis, in accordance with a documented risk management or investment strategy, and information about the group is provided internally on that basis to the entity’s key management personnel (as defined in IAS 24). [Refer: At fair value [member]; Key management personnel of entity or parent [member]; Derivatives [member]; Financial assets; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 8 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_8_e&doctype=Standard -URIDate 2017-03-09 + Details
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