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12. FINANCIAL INSTRUMENTS (Details 9) - BRL (R$) R$ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disclosure of detailed information about financial instruments [line items]
Movement	R$ 604,828	R$ 1,415,962	R$ 50,987
Foreign Exchange Risk [Member]
Disclosure of detailed information about financial instruments [line items]
Fair value, net of taxes, ending	5,567
Foreign Exchange Risk [Member] | Hedges of Net Investment in Foreign Operations [Member]
Disclosure of detailed information about financial instruments [line items]
Fair value, net of taxes, beginning	3,941
Movement	(2,472)
Fair value, net of taxes, ending	1,469	3,941
Foreign Exchange Risk [Member] | Fair Value Of Net Investment Hedge In Foreign Operations [Member]
Disclosure of detailed information about financial instruments [line items]
Fair value, net of taxes, beginning	3,941
Movement	(2,472)
Fair value, net of taxes, ending	R$ 1,469	R$ 3,941

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

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The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
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-IssueDate 2019-01-01
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- Definition

The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
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