v3.26.1
Financial Asset (Indemnity) (Details Narrative)
R$ in Billions
Dec. 31, 2025
BRL (R$)
Concession Agreement [Member]
IfrsStatementLineItems [Line Items]
Adjustment of financial assets
R$ 1
X
- References
No definition available.
+ Details
Name:
sbs_AdjustmentOfFinancialAssets
Namespace Prefix:
sbs_
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_TypesOfFinancialAssetsAxis=sbs_ConcessionAgreementMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: