XML 157 R143.htm IDEA: XBRL DOCUMENT
v3.21.1

21 Employees benefits (Details 9) - BRL (R$) R$ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Employees Benefits |  |  |
Total fixed income | R$ 1,811,164 | R$ 1,795,554 |
Total equities | 311,958 | 301,707 |
Total structured investments | 575,943 | 630,933 |
Other | 94,862 | 24,223 |
Fair value of the plan's assets | R$ 2,793,927 | R$ 2,752,417 | R$ 2,168,436
Percentage of total fixed income | 64.80% | 65.20% |
Percentage of total equities | 11.20% | 11.00% |
Percentage of total structured investments | 20.60% | 22.90% |
Percentage of other | 3.40% | 0.90% |
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 [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_b&doctype=Standard -URIDate 2020-01-01 + 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 [member]; Investment funds [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_f&doctype=Standard -URIDate 2020-01-01 + 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 [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_OtherAssetsAmountContributedToFairValueOfPlanAssets
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The fair value of defined benefit plan assets. Plan assets comprise assets held by a long-term employee benefit fund and qualifying insurance policies. [Refer: At fair value [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 57 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_57_a&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_PlanAssetsAtFairValue
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 [member]] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 142 -Subparagraph h -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_142_h&doctype=Standard -URIDate 2020-01-01 + 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_EmployeesBenefitsAbstract
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The percentage represents the fair value of plans assets. + References No definition available. + Details
Name: | sbs_PercentageOfFairValueOfPlansAssets
Namespace Prefix: | sbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage represents the other. + References No definition available. + Details
Name: | sbs_PercentageOfOther
Namespace Prefix: | sbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage represents the total equities. + References No definition available. + Details
Name: | sbs_PercentageOfTotalEquities
Namespace Prefix: | sbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage represents the total fixed income. + References No definition available. + Details
Name: | sbs_PercentageOfTotalFixedIncome
Namespace Prefix: | sbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The percentage represents the total structured investments. + References No definition available. + Details
Name: | sbs_PercentageOfTotalStructuredInvestments
Namespace Prefix: | sbs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant