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Employee Benefits and Private Pension Plan - Sensitivity analysis (Detail) R$ in Thousands	Dec. 31, 2021 BRL (R$)
Discount rate [Member]
Disclosure of defined benefit plans [line items]
Change in assumptions	1.00%
Decrease in liability	R$ 24,196
Change in assumptions	1.00%
Increase in liability	R$ 24,293
Wage growth rate [member]
Disclosure of defined benefit plans [line items]
Change in assumptions	1.00%
Decrease in liability	R$ 3,002
Change in assumptions	1.00%
Increase in liability	R$ 2,258
Medical services growth rate [Member]
Disclosure of defined benefit plans [line items]
Change in assumptions	1.00%
Decrease in liability	R$ 19,218
Change in assumptions	1.00%
Increase in liability	R$ 23,522

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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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

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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

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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

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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]]

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