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17 PROVISION FOR ENVIRONMENTAL LIABILITIES AND ASSET RETIREMENT OBLIGATIONS (Details Narrative) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Mining [Member] |  |
ProvisionForEnvironmentalLiabilitiesAndAssetRetirementObligationsLineItems [Line Items] |  |
Provision for deactivating assets | R$ 331,731 | R$ 83,380

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- Definition The amount of liabilities of uncertain timing or amount. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph l -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_l&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | credit
Period Type: | instant

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Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |