XML 237 R161.htm IDEA: XBRL DOCUMENT
v3.25.1

Pension plan obligations (Details 8) - BRL (R$) R$ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Pension Plan Obligations |  |
Total fixed income | R$ 2,279,323 | R$ 2,714,823
Percentage of total fixed income | 92.30% | 92.40%
Total equities | R$ 13,886 | R$ 15,715
Percentage of total equities | 0.60% | 0.50%
Total structured investments | R$ 121,820 | R$ 153,333
Percentage of total structured investments | 4.90% | 5.20%
Other | R$ 53,153 | R$ 54,743
Percentage of other | 2.20% | 1.90%
Fair value of the plan's assets | R$ 2,468,182 | R$ 2,938,614
Percentage of fair value of the plan's assets | 100.00% | 100.00%

X
- Definition The amount instruments representing equity (rather than debt) contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 142 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142_b&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_EquityInstrumentsAmountContributedToFairValueOfPlanAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount investment funds contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]; Investment funds [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 142 -Subparagraph f -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142_f&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_InvestmentFundsAmountContributedToFairValueOfPlanAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount other types of assets not separately disclosed contribute to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 142 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_OtherAssetsAmountContributedToFairValueOfPlanAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount debt that has been structured to meet a particular investment objective contributes to the fair value of defined benefit plan assets. [Refer: Plan assets, at fair value; Defined benefit plans [domain]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2024-01-01 -Paragraph 142 -Subparagraph h -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=19&code=ifrs-tx-2024-en-r&anchor=para_142_h&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_StructuredDebtAmountContributedToFairValueOfPlanAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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

X
- References No definition available. + Details
Name: | sbs_PercentageOfFairValueOfPlansAssets
Namespace Prefix: | sbs_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | sbs_PercentageOfOther
Namespace Prefix: | sbs_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | sbs_PercentageOfTotalEquities
Namespace Prefix: | sbs_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | sbs_PercentageOfTotalFixedIncome
Namespace Prefix: | sbs_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | sbs_PercentageOfTotalStructuredInvestments
Namespace Prefix: | sbs_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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