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v3.25.1

Borrowings and financing (Details 7) | 12 Months Ended
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Dec. 31, 2024
Adjusted Net Debt / Adjusted EBITDA [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or higher than 2.80
EBITDA / Financial Expenses Paid [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or higher than 2.35
Adjusted Net Debt / Adjusted EBITDA [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or lower than 3.80
Net Debt / Adjusted EBITDA [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or lower than 3.50
Other Onerous Debt / Adjusted EBITDA [Member] |
IfrsStatementLineItems [Line Items] |
Covenants | Equal to or lower than 1.30

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Namespace Prefix: | sbs_
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Balance Type: | na
Period Type: | duration

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Namespace Prefix: | sbs_
Data Type: | xbrli:stringItemType
Balance Type: | na
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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: |
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |

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- Details
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Balance Type: |
Period Type: |

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