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Insurance Contracts and Private Pension - Summary of Deferred Acquisition Costs (Detail) - BRL (R$) R$ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disclosure of reinsurance assets [Line Items]
Beginning Balance	R$ 409	R$ 253
Increase	1,156	1,001
Amortization	(1,070)	(845)
Ending Balance	495	409
Up to one year [member]
Disclosure of reinsurance assets [Line Items]
Beginning Balance	334
Ending Balance	389	334
Non-current [Member]
Disclosure of reinsurance assets [Line Items]
Beginning Balance	75
Ending Balance	R$ 106	R$ 75

X

- Definition

The amount of amortisation of deferred losses (gains) arising from the purchase of reinsurance. [Refer: Depreciation and amortisation expense; Gains (losses) recognised in profit or loss on buying reinsurance]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 4
-IssueDate 2019-01-01
-Paragraph 37
-Subparagraph b
-Clause ii
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-URIDate 2019-03-27

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- Definition

The increase (decrease) in reinsurance assets. [Refer: Reinsurance assets]

+ References

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-Note Expiry date 2021-01-01
-Name IFRS
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- Definition

The amount of a cedant’s net contractual rights under a reinsurance contract.

+ References

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-Note Expiry date 2021-01-01
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-IssueDate 2019-01-01
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- Definition

Disclosure of reinsurance assets.

+ References

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