Insurance contracts and private pension (Details 5) - BRL (R$) R$ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
IfrsStatementLineItems [Line Items]
(-) IBNER	R$ 371	R$ 361
Claims Development [member]
IfrsStatementLineItems [Line Items]
Provision for unsettled claims (PSL)	577
(-) IBNER	213
(-) Reinsurance	12
Retrocession and other estimates	(7)
Liability claims presented in the development table (a + b)	R$ 359

The amount of liability for insured events that have occurred but for which claims have yet not been reported by policyholders.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 4
-IssueDate 2022-03-24
-Paragraph 37
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2022-en-b&anchor=para_37_b&doctype=Standard&book=b
-URIDate 2022-03-24

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Note Expiry date 2023-01-01
-Name IFRS
-Number 4
-IssueDate 2022-03-24
-Paragraph IG22
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2022-en-b&anchor=para_IG22_c&doctype=Implementation%20Guidance&book=b
-URIDate 2022-03-24

Name:	ifrs-full_ClaimsIncurredButNotReported
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant