19. EMPLOYEES BENEFITS (Details 9) R$ in Thousands	Dec. 31, 2020 BRL (R$)
Medical plan [Member] \| Discount rate [Member]
Disclosure of defined benefit plans [line items]
Assumptions utilized	7.68%
Average (%)	8.68%
Actuarial liabilities	R$ 164,011
Average (%)	6.68%
Actuarial liabilities	R$ 212,435
Medical plan [Member] \| Inflation Brazil [Member]
Disclosure of defined benefit plans [line items]
Assumptions utilized	6.35%
Average (%)	7.35%
Actuarial liabilities	R$ 211,694
Average (%)	5.35%
Actuarial liabilities	R$ 164,224
F.G.T.S. Penalty [Member] \| Discount rate [Member]
Disclosure of defined benefit plans [line items]
Assumptions utilized	6.51%
Average (%)	7.51%
Actuarial liabilities	R$ 265,825
Average (%)	5.51%
Actuarial liabilities	R$ 301,077
F.G.T.S. Penalty [Member] \| Wage growth rate [Member]
Disclosure of defined benefit plans [line items]
Assumptions utilized	3.25%
Average (%)	4.25%
Actuarial liabilities	R$ 286,139
Average (%)	2.25%
Actuarial liabilities	R$ 278,672
F.G.T.S. Penalty [Member] \| Turnover [Member]
Disclosure of defined benefit plans [line items]
Average (%)	3.00%
Actuarial liabilities	R$ 233,001
Average (%)	(3.00%)
Actuarial liabilities	R$ 356,695

The percentage of actuarial assumptions utilized.

No definition available.

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- Definition

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.

+ References

No definition available.

+ Details

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- Definition

The increase (decrease) in a defined benefit obligation that would have been caused by a decrease in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2020-01-01
-Paragraph 145
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_145_a&doctype=Standard
-URIDate 2020-01-01

+ Details

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- Definition

The increase (decrease) in a defined benefit obligation that would have been caused by an increase in a significant actuarial assumption that was reasonably possible at the end of the reporting period. [Refer: Actuarial assumptions [member]]

+ References

+ Details

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- Definition

The reasonably possible percentage of the decrease in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]]

+ References

+ Details

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- Definition

The reasonably possible percentage of the increase in the actuarial assumption used to determine the present value of defined benefit obligation. [Refer: Actuarial assumptions [member]]

+ References

+ Details

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- Details

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- Details

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- Details

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