XML 135 R126.htm IDEA: XBRL DOCUMENT
v3.24.1.1.u2

Pension plan obligations (Details) - BRL (R$) R$ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2024 | Mar. 31, 2023
IfrsStatementLineItems [Line Items] |  |
Pension plan obligations, beginning | R$ (2,142,871) | R$ (2,150,191)
Expenses recognized | (48,879) | (51,921)
Payments during the period | 60,520 | 58,324
Pension plan obligations, ending | (2,131,230) | (2,143,788)
G 1 Plan [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Pension plan obligations, beginning | (44,249) | (148,116)
Expenses recognized | (1,560) | 4,384
Payments during the period | 10,096 | 10,124
Pension plan obligations, ending | (35,713) | (133,608)
G 0 Plan [Member] |  |
IfrsStatementLineItems [Line Items] |  |
Pension plan obligations, beginning | (2,098,622) | (2,002,075)
Expenses recognized | (47,319) | (56,305)
Payments during the period | 50,424 | 48,200
Pension plan obligations, ending | R$ (2,095,517) | R$ (2,010,180)

X
- References No definition available. + Details
Name: | sbs_CurrentServiceCostDefinedBenefitPlan
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | sbs_IfrsStatementLineItems
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | sbs_PaymentOfDefinedBenefitObligation
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | sbs_PensionPlanDefinedBenefitObligation
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=sbs_G1PlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_DefinedBenefitPlansAxis=sbs_G0PlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |