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Post-Employment Benefits - Summary of Defined Benefit Contribution (Detail) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of defined benefit plans and defined contribution plans [Line Items]
Estimated contribution	R$ 57
Contributions made	53	R$ 69
Pension plan - FIU [member]
Disclosure of defined benefit plans and defined contribution plans [Line Items]
Estimated contribution	52
Contributions made	45	58
Pension plan - FUNBEP [member]
Disclosure of defined benefit plans and defined contribution plans [Line Items]
Estimated contribution	5
Contributions made	R$ 8	R$ 11

X

- Definition

The amount of employer contributions to retirement benefit plans.

+ References

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-Number 26
-IssueDate 2019-01-01
-Paragraph 35
-Subparagraph b
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X

- Definition

The estimate of the expected contributions to be made to a defined benefit plan for the next annual reporting period. [Refer: Defined benefit plans [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2019-01-01
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-Subparagraph b
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- Definition

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+ References

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