XML 175 R99.htm IDEA: XBRL DOCUMENT v3.25.1

Financial investments (Details 1) - BRL (R$) R$ in Thousands	Dec. 31, 2024	Dec. 31, 2023
IfrsStatementLineItems [Line Items]
Financial investments, non current	R$ 769,057
Banco Itau S/A [Member]
IfrsStatementLineItems [Line Items]
Financial investments, non current	R$ 769,057

X

- Definition

The amount of non-current financial assets measured at amortised cost. [Refer: Financial assets at amortised cost]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 8
-Subparagraph f
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_8_f&doctype=Standard
-URIDate 2024-03-27

+ Details

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

X

- References

No definition available.

+ Details

Name:	sbs_IfrsStatementLineItems
Namespace Prefix:	sbs_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_CategoriesOfRelatedPartiesAxis=sbs_BancoItauSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: