XML 153 R139.htm IDEA: XBRL DOCUMENT
v3.21.1

21 Employees benefits (Details 5) R$ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 BRL (R$)
G1 Plan [member] |
Summary of employee benefits [Line Items] |
Payment of benefits expected in 2021 | R$ 177,347
Payment of benefits expected in 2022 | 172,477
Payment of benefits expected in 2023 | 167,906
Payment of benefits expected in 2024 | 162,648
Payment of benefits expected in 2025 or after | 2,432,602
Payment of benefits expected | R$ 3,112,980
Duration | 11.88 years
G0 plan [member] |
Summary of employee benefits [Line Items] |
Payment of benefits expected in 2021 | R$ 169,178
Payment of benefits expected in 2022 | 167,263
Payment of benefits expected in 2023 | 164,426
Payment of benefits expected in 2024 | 160,721
Payment of benefits expected in 2025 or after | 1,887,953
Payment of benefits expected | R$ 2,549,541
Duration | 9.40 years

X
- Definition The amount of expense from employee benefits (other than termination benefits), which are expected to be settled wholly within twelve months after the end of the annual reporting period in which the employees render the related services, that the entity does not separately disclose in the same statement or note. [Refer: Employee benefits expense] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 9 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_9&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_OtherShorttermEmployeeBenefits
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The duration of payment of benefit expense. + References No definition available. + Details
Name: | sbs_DurationPaymentOfBenefitExpense
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount represents the other short term employee benefits. + References No definition available. + Details
Name: | sbs_OtherShorttermEmployeeBenefitsFiveYear
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount represents the other short term employee benefits. + References No definition available. + Details
Name: | sbs_OtherShorttermEmployeeBenefitsFourYear
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount represents the other short term employee benefits. + References No definition available. + Details
Name: | sbs_OtherShorttermEmployeeBenefitsOneYear
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount represents the other short term employee benefits. + References No definition available. + Details
Name: | sbs_OtherShorttermEmployeeBenefitsThreeYear
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount represents the other short term employee benefits. + References No definition available. + Details
Name: | sbs_OtherShorttermEmployeeBenefitsTwoYear
Namespace Prefix: | sbs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Its represents information related to summary of employee benefits. + References No definition available. + Details
Name: | sbs_SummaryOfEmployeeBenefitsLineItems
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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: |