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v3.21.1

20 Provisions (Details Narrative) - BRL (R$) R$ in Thousands |  | 12 Months Ended
--- | --- | ---
May 25, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Summary of provisions [Line Items] |  |  |
Lawsuits filed by commercial customers |  | 690 | 680
Lawsuits which customers claim a reduction in the sewage tariff |  | 310 | 320
Lawsuits which customers plead reduction in tariff |  | 30 | 30
Renewed guarantee insurance | R$ 500 |  |
Guarantee insurance for escrow deposit |  | R$ 121,469 | R$ 126,385
Guarantee insurance for escrow deposit terms | 5 years |  |
Guarantee insurance for escrow deposit, current |  | 81,635 |
Guarantee insurance for escrow deposit outtanding |  | 418,365 |
Environmental claims [member] |  |  |
Summary of provisions [Line Items] |  |  |
Increase (decrease) in the lawsuits deemed as contingent liabilities |  | 1,116,943 |
Increase in accrued lawsuits due to revisions of expectations arising from court decisions |  | 56,630 |
Customer claims [member] |  |  |
Summary of provisions [Line Items] |  |  |
Increase (decrease) in the lawsuits deemed as contingent liabilities |  | 93,540 |
Supplier claims [member] |  |  |
Summary of provisions [Line Items] |  |  |
Increase (decrease) in the lawsuits deemed as contingent liabilities |  | 636,428 |
Increase in accrued lawsuits due to revisions of expectations arising from court decisions |  | 257,020 |
Tax claims [member] |  |  |
Summary of provisions [Line Items] |  |  |
Increase (decrease) in the lawsuits deemed as contingent liabilities |  | 68,825 |
Tax deficiency notice related to sewage services |  | 731,809 | 664,669
Labor claims [member] |  |  |
Summary of provisions [Line Items] |  |  |
Increase (decrease) in the lawsuits deemed as contingent liabilities |  | 374,284 |
Other concession-related legal proceedings [member] |  |  |
Summary of provisions [Line Items] |  |  |
Indemnities receivable |  | 27,539 | R$ 114,335
Environmental lawsuits with settlements [member] |  |  |
Summary of provisions [Line Items] |  |  |
Consent decree |  | 272,055 |
Consent decree - performance works |  | 270,505 |
Consent decree - environmental |  | R$ 1,550 |

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