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19. EMPLOYEES BENEFITS (Details 4) - FAF [Member] R$ in Thousands	Dec. 31, 2020 BRL (R$)
Discount rate [Member]
Disclosure of defined benefit plans [line items]
Assumptions utilized	7.49%
Average rate	8.49%
Actuarial liabilities	R$ 2,992,764
Average rate	6.49%
Actuarial liabilities	R$ 3,852,966
Wage growth rate [Member]
Disclosure of defined benefit plans [line items]
Assumptions utilized	3.49%
Average rate	4.49%
Actuarial liabilities	R$ 3,451,715
Average rate	2.49%
Actuarial liabilities	R$ 3,314,607

X

- Definition

The percentage of actuarial assumptions utilized.

+ References

No definition available.

+ Details

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X

- 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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X

- 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
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X

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 19
-IssueDate 2020-01-01
-Paragraph 145
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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

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

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