43. Other disclosures (Details 2) - BRL (R$) R$ in Thousands	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Offbalance Funds Under Management [Abstract]
Funds under management	R$ 2,716,477	R$ 2,034,999	R$ 1,896,689
Managed Funds	191,873,169	230,199,261	200,366,261
Total	R$ 194,589,646	R$ 232,234,260	R$ 202,262,950

The amount investment funds contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [member]; Investment funds [member]]

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 19
-IssueDate 2020-01-01
-Paragraph 142
-Subparagraph f
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_f&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_InvestmentFundsAmountContributedToFairValueOfPlanAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant