XML 215 R139.htm IDEA: XBRL DOCUMENT
v3.25.1

Borrowings and financing (Details Narrative) ¥ in Thousands, R$ in Thousands, $ in Thousands |  |  |  | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Feb. 10, 2025 | Sep. 10, 2024 BRL (R$) | Mar. 05, 2024 BRL (R$) | Dec. 31, 2024 USD ($) Number | Jun. 04, 2025 BRL (R$) | May 10, 2025 BRL (R$) | Feb. 17, 2025 BRL (R$) | Dec. 31, 2024 BRL (R$) Number | Dec. 31, 2024 JPY (¥) Number | Dec. 31, 2023 Number
Derivative Financial Instruments [Member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Notional value |  |  |  | $ 303,977 |  |  |  |  | ¥ 36,787,581 |
Interest rate |  |  |  | CDI - 0.36% p.a |  |  |  |  |  |
FINEP [Member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Amortization of borrowings |  |  |  |  |  |  |  | R$ 4,065 |  |
31th issue debentures [member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Funds raised from unsecured debentures |  |  | R$ 2,940,500 |  |  |  |  |  |  |
Debenture aggregate amount |  |  | 198,000 |  |  |  |  |  |  |
Funds raised from unsecured debentures |  |  | R$ 2,940,478 |  |  |  |  |  |  |
12th issue debentures [member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Amortization of borrowings |  |  |  |  | R$ 49,704,900 |  |  |  |  |
Principal of borrowings |  |  |  |  | 49,287,500 |  |  |  |  |
Interest of borrowings |  |  |  |  | R$ 417,400 |  |  |  |  |
23rd issue debentures [member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Amortization of borrowings |  |  |  |  |  | R$ 519,439,900 |  |  |  |
Principal of borrowings |  |  |  |  |  | 491,755,000 |  |  |  |
Interest of borrowings |  |  |  |  |  | R$ 27,684,900 |  |  |  |
32th issue debentures [member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Debenture aggregate amount |  | R$ 203,000 |  |  |  |  |  |  |  |
32th issue debentures [member] | Single Series [Member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Funds raised from unsecured debentures |  | R$ 2,500,000 |  |  |  |  |  |  |  |
Interest rate, description |  | CDI + 0.30% p.a. |  |  |  |  |  |  |  |
IDB Invest 2020 [Member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Partial amortization amount |  |  |  |  |  |  | R$ 492,119 |  |  |
Partial principal amount |  |  |  |  |  |  | 459,740 |  |  |
Partial interest amount |  |  |  |  |  |  | R$ 32,379 |  |  |
Interest rate, description | Additionally, as of February 10, 2025, the spread of the medium-term tranche was renegotiated from DI + 1.90% to DI + 0.90% and became effective on February 18, 2025. |  |  |  |  |  |  |  |  |
Currency U S D [Member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Exchange rate | Number |  |  |  | 6.1923 |  |  |  | 6.1923 | 6.1923 | 4.8413
Currency J P Y [Member] |  |  |  |  |  |  |  |  |  |
IfrsStatementLineItems [Line Items] |  |  |  |  |  |  |  |  |  |
Exchange rate | Number |  |  |  | 0.03947 |  |  |  | 0.03947 | 0.03947 | 0.03422

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 2024-01-01 -Paragraph 7 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_7&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_BorrowingsInterestRateBasis
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
Name: | ifrs-full_ClosingForeignExchangeRate
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | instant

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

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

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

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

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

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

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

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

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

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

X
- Details
Name: | ifrs-full_TypesOfHedgesAxis=sbs_DerivativeFinancialInstrumentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CategoriesOfRelatedPartiesAxis=sbs_FINEPMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

X
- Details
Name: | ifrs-full_TypesOfInterestRatesAxis=sbs_SingleSeriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_BorrowingsByNameAxis=sbs_IDBInvest2020Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=sbs_CurrencyUSDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_CurrencyInWhichInformationIsDisplayedAxis=sbs_CurrencyJPYMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |