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Post-employment Benefits - Summary of Changes in Discount Rate (Detail) R$ in Thousands	Dec. 31, 2021 BRL (R$)
Defined benefit [member] | Defined benefit [member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate, increase	R$ (28,170)
Discount rate, decrease	30,525
Health plan [member] | Health Plan
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Discount rate, increase	(25,019)
Discount rate, decrease	R$ 27,708

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- 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

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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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