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20. PROVISION FOR TAX, SOCIAL SECURITY, LABOR, CIVIL, ENVIRONMENTAL RISKS AND JUDICIAL DEPOSITS (Details Narrative) - BRL (R$) R$ in Thousands				1 Months Ended
	Dec. 27, 2018	Aug. 27, 2017	Apr. 08, 2013	May 31, 2014	Jan. 31, 2014	Dec. 31, 2020
ProvisionForTaxSocialSecurityLaborCivilEnvironmentalRisksAndJudicialDepositsLineItems [Line Items]
Penalty fee		R$ 25,000
Updated amount						R$ 4,542,786
Municipality of volta redonda [member]
ProvisionForTaxSocialSecurityLaborCivilEnvironmentalRisksAndJudicialDepositsLineItems [Line Items]
Penalty fee			R$ 35,000
MVR [member] | New agreement [member]
ProvisionForTaxSocialSecurityLaborCivilEnvironmentalRisksAndJudicialDepositsLineItems [Line Items]
Additional investment	R$ 21,000
Percentage of allocated to services of environmental interest	30.00%
Actual disbursement	R$ 25,000
INEA [member]
ProvisionForTaxSocialSecurityLaborCivilEnvironmentalRisksAndJudicialDepositsLineItems [Line Items]
Penalty fee				R$ 42,000	R$ 35,000

X

- Definition

The amount of income arising from fines and penalties.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

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- Definition

The amount of actual disbursement.

+ References

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- Definition

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+ References

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- Definition

Represent information about the percentage of allocated to services of environmental interest.

+ References

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