INSURANCE CONTRACTS (Details 8) - BRL (R$) R$ in Thousands	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023
Notes and other explanatory information [abstract]
Changes in obligation to pay arising from return on investment	R$ 8,459,749	R$ 11,547,973
Interest on monetary adjustment of insurance liabilities	21,681,764	22,338,084
Amounts recognized in income	30,141,513	33,886,057
Effect of changes in interest rates	(3,916,352)	1,871,540
Amounts recognized in other comprehensive income	(3,916,352)	1,871,540
Financial expenses of insurance contracts	R$ 26,225,161	R$ 35,757,597

The amount of insurance finance income (expenses) from insurance contracts issued that is excluded from profit or loss and recognised in other comprehensive income that will be reclassified subsequently to profit or loss, net of tax, before reclassification adjustments. [Refer: Insurance finance income (expenses); Insurance contracts issued [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 91
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_91_a&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2024-01-01
-Paragraph 90
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_90&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 17
-IssueDate 2024-01-01
-Paragraph 80
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=17&code=ifrs-tx-2024-en-r&anchor=para_80_b&doctype=Standard
-URIDate 2024-03-27

Name:	ifrs-full_InsuranceFinanceIncomeExpensesFromInsuranceContractsIssuedExcludedFromProfitOrLossThatWillBeReclassifiedToProfitOrLossNetOfTax
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration