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Operations (Details) - Sao Paulo [Member] R$ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 BRL (R$) Municipalities | Mar. 31, 2023 BRL (R$) Municipalities | Dec. 31, 2023 BRL (R$) Municipalities
IfrsStatementLineItems [Line Items] |  |  |
Municipalities that have already signed contracts: | Municipalities | 351 | 351 | 351
Balance – intangible and contract assets | R$ 49,485,788 | R$ 45,931,674 | R$ 48,759,219
Percentage of intangible and contract assets | 95.10% | 94.79% | 95.12%
Revenue from sanitation services (excluding construction revenue) | R$ 5,384,173 | R$ 4,678,421 | R$ 20,510,427
Percentage of revenue from sanitation services (excluding construction revenue) | 95.11% | 95.30% | 95.35%
Other Municipalities - Olimpia | Municipalities | 1 |  | 1
Balance – intangible and contract assets | R$ 146,715 |  | R$ 147,589
Percentage of intangible and contract assets | 0.28% |  | 0.29%
Revenue from sanitation services (excluding construction revenue) | R$ 8,525 |  | R$ 3,477
Percentage of revenue from sanitation services (excluding construction revenue) | 0.15% |  | 0.02%
Municipalities with expired contracts: | Municipalities | 1 | 1 | 1
Balance – intangible and contract assets | R$ 11,429 | R$ 11,443 | R$ 11,309
Percentage of intangible and contract assets | 0.02% | 0.02% | 0.02%
Revenue from sanitation services (excluding construction revenue) | R$ 4,361 | R$ 3,822 | R$ 17,559
Percentage of revenue from sanitation services (excluding construction revenue) | 0.08% | 0.08% | 0.08%
Municipalities with concession agreements due by 2030: | Municipalities | 23 | 23 | 23
Balance – intangible and contract assets | R$ 1,045,481 | R$ 1,064,090 | R$ 1,051,209
Percentage of intangible and contract assets | 2.02% | 2.20% | 2.05%
Revenue from sanitation services (excluding construction revenue) | R$ 223,943 | R$ 189,704 | R$ 833,418
Percentage of revenue from sanitation services (excluding construction revenue) | 3.96% | 3.86% | 3.87%
Municipality of São Paulo: |  |  |
Percentage of intangible and contract assets | 43.08% | 43.21% | 43.40%
Percentage of revenue from sanitation services (excluding construction revenue) | 43.49% | 44.53% | 44.95%

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