XML 130 R116.htm IDEA: XBRL DOCUMENT
v3.21.1

17 Borrowings and financing (Details 1) | 12 Months Ended
--- | ---
Dec. 31, 2020
Local currency [member] | 10th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2020 |
Annual interest rates | TJLP +1.92% (Series 1 and 3) and 9.53% (Series 2) |
Inflation adjustment | IPCA (Series 2) |
Local currency [member] | 12th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2025 |
Annual interest rates | TR + 9.5% |
Local currency [member] | 14th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2022 |
Annual interest rates | TJLP +1.92% (Series 1 and 3) and 9.19% (Series 2) |
Inflation adjustment | IPCA (Series 2) |
Local currency [member] | 17th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2023 |
Annual interest rates | CDI +0.75% (Series 1) and 4.5% (Series 2) and4.75% (Series 3) |
Inflation adjustment | IPCA (Series 2 and 3) |
Local currency [member] | 18th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2024 |
Annual interest rates | TJLP 1.92 % (Series 1 and 3) and 8.25% (Series 2) |
Inflation adjustment | IPCA (Series 2) |
Local currency [member] | 21st issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2022 |
Annual interest rates | CDI + 0.60% e CDI+ 0.90% |
Local currency [member] | 22nd issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2025 |
Annual interest rates | CDI +0.58% (Series 1) and CDI + 0.90% (Series 2) and 6.0% (Series 3) |
Inflation adjustment | IPCA (Series 3) |
Local currency [member] | 23rd issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2027 |
Annual interest rates | CDI +0.49% (Series 1) and CDI + 0.63% (Series 2) |
Local currency [member] | 24th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2029 |
Annual interest rates | 3.20% (Series 1) and 3.37% (Series 2) |
Inflation adjustment | IPCA (Series 1 and 2) |
Local currency [member] | 25th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2021 |
Annual interest rates | CDI + 3.3% |
Local currency [member] | 26th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2030 |
Annual interest rates | 4.65% (series 1) and 4.95% (series 2) |
Inflation adjustment | IPCA (series 1 and 2) |
Local currency [member] | 27th issue debentures [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2027 |
Annual interest rates | CDI +1.60% (Series 1) and CDI + 1.80% (Series 2) and 2.25% (Series 3) |
Local currency [member] | Brazilian federal savings bank [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2021/2042 |
Annual interest rates | 5% to 9.5% |
Inflation adjustment | TR |
Local currency [member] | Brazilian Development Bank - BNDES PAC [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2023 |
Annual interest rates | TJLP+1.82% |
Local currency [member] | Brazilian Development Bank - BNDES PAC II 9751 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2027 |
Annual interest rates | TJLP+1.72% |
Local currency [member] | Brazilian Development Bank - BNDES PAC II 9752 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2027 |
Annual interest rates | TJLP+1.72% |
Local currency [member] | Brazilian Development Bank - BNDES ONDA LIMPA [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2025 |
Annual interest rates | TJLP+1.92% |
Local currency [member] | Brazilian Development Bank - BNDES TIETE III [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2028 |
Annual interest rates | TJLP+1.66% |
Local currency [member] | Brazilian Development Bank - BNDES 2015 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2035 |
Annual interest rates | TJLP+2.18% |
Local currency [member] | Other [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2025 |
Annual interest rates | 3% (FEHIDRO) and TJLP + 1.5% (FINEP) |
Local currency [member] | Inter-American Development Bank - BID 2202 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2035 |
Annual interest rates | CDI+0.86% |
Local currency [member] | Brazilian Development Bank - BNDES 2014 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2026 |
Annual interest rates | TJLP+1.76% |
Local currency [member] | Leases (Concession Agreements, Program Contracts and Contract Assets) [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Maturity | 2035 |
Annual interest rates | 7.73% to 10.12% |
Inflation adjustment | IPC |
Local currency [member] | Leases (Others) [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Maturity | 2023 |
Annual interest rates | 4.24% to 9.29% |
Local currency [member] | Inter-American Development Bank - BID INVEST [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Own funds |
Maturity | 2034 |
Annual interest rates | CDI+1.90% and CDI+2.70% |
Foreign currency [member] | Inter-American Development Bank - BID 1212 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2025 |
Annual interest rates | 3.31% | [1]
Exchange rate changes | US$ |
Foreign currency [member] | International Bank for Reconstruction and Development - BIRD [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2034 |
Annual interest rates | 2.85% | [1]
Exchange rate changes | US$ |
Foreign currency [member] | JICA 15 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2029 |
Annual interest rates | 1.8% and 2.5% |
Exchange rate changes | Yen |
Foreign currency [member] | JICA 18 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2029 |
Annual interest rates | 1.8% and 2.5% |
Exchange rate changes | Yen |
Foreign currency [member] | JICA 17 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2035 |
Annual interest rates | 1.2% and 0.01% |
Exchange rate changes | Yen |
Foreign currency [member] | JICA 19 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2037 |
Annual interest rates | 1.7% and 0.01% |
Exchange rate changes | Yen |
Foreign currency [member] | BID 1983AB [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Maturity | 2023 |
Annual interest rates | 2.08% to 2.38% | [1]
Exchange rate changes | US$ |
Foreign currency [member] | Inter-American Development Bank - BID 4623 [member] |  |
Disclosure of detailed information about borrowings [line items] |  |
Guarantees | Government |
Maturity | 2044 |
Annual interest rates | 1.12% | [1]
Exchange rate changes | US$ |
[1] | Rates comprising LIBOR + contractually defined spread.

X
- Definition The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BorrowingsInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maturity of borrowings. [Refer: Borrowings] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 7 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_7&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_BorrowingsMaturity
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
Name: | ifrs-full_DisclosureOfDetailedInformationAboutBorrowingsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of borrowing exchange rate changes. + References No definition available. + Details
Name: | sbs_BorrowingsExchangeRateChanges
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of borrowing guarantee. + References No definition available. + Details
Name: | sbs_BorrowingsGuarantees
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of borrowing inflation adjustments. + References No definition available. + Details
Name: | sbs_BorrowingsInflationAdjustment
Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | sbs_ReportingCurrencyAxis=sbs_LocalCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TenthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwelfthMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_FourteenthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_SeventeenthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_EighteenthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentyFirstIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentySecondIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentyThirdIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentyFourthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentyFifthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentySixthIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_TwentySeventhIssueDebenturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianFederalSavingsBankMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDESPACMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDESPACII9751Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDESPACII9752Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDESONDALIMPAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDESTIETEIIIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDES2015Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_OthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_InterAmericanDevelopmentBankBID2202Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BrazilianDevelopmentBankBNDES2014Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_LeasesConcessionAgreementsProgramContractsAndContractAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_LeasesOthersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_InterAmericanDevelopmentBankBIDINVESTMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | sbs_ReportingCurrencyAxis=sbs_ForeignCurrencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_InterAmericanDevelopmentBankBID1212Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_InternationalBankForReconstructionAndDevelopmentBIRDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_JICA15Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_JICA18Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_JICA17Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_JICA19Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_BID1983ABMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_InterAmericanDevelopmentBankBID4623Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |