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v3.24.1.1.u2

Borrowings and financing (Details 5) | 3 Months Ended
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Mar. 31, 2024
Adjusted E B I T D A Adjusted Financial Expenses [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or higher than 2.80
E B I T D A Financial Expenses Paid [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or higher than 2.35
Adjusted Net Debt Adjusted E B I T D A [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or lower than 3.80
Net Debt Adjusted E B I T D A [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or lower than 3.50
Other Onerous Debt Adjusted E B I T D A [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or lower than 1.30
Adjusted Current Ratio [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Higher than 1.00

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

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |