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16 PROVISION FOR TAX, SOCIAL SECURITY, LABOR, CIVIL AND ENVIRONMENTAL RISKS AND JUDICIAL DEPOSITS (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Accrued liabilities | R$ 623,247 | R$ 792,456
Judicial deposits | 328,371 | 347,950
Accrued liabilities current | 96,479 | 106,503
Accrued liabilities non current | 526,768 | 685,953
Judicial deposits non current | 328,371 | 347,950
Tax [Member] |  |
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Accrued liabilities | 128,411 | 118,490
Judicial deposits | 31,060 | 46,321
Social Security [Member] |  |
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Accrued liabilities | 7,039 | 70,084
Judicial deposits |  | 50,898
Labor [Member] |  |
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Accrued liabilities | 305,309 | 362,228
Judicial deposits | 227,213 | 214,625
Civil [Member] |  |
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Accrued liabilities | 138,990 | 210,264
Judicial deposits | 53,771 | 22,024
Environmental [Member] |  |
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Accrued liabilities | 43,498 | 31,390
Judicial deposits | 3,731 | 1,900
Deposit Of A Guarantee [Member] |  |
ProvisionForTaxSocialSecurityLaborCivilAndEnvironmentalRisksAndJudicialDepositsLineItems [Line Items] |  |
Judicial deposits | R$ 12,596 | R$ 12,182

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