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Related-Party Balances and Transactions (Tables)
 12 Months Ended
Dec. 31, 2022
Related-party Balances And Transactions  
Schedule of loan agreement through credit facility
          
   December 31, 2022  December 31, 2021
Accounts receivable      
Current:      
Sanitation services (ii)   144,937    127,614 
Allowance for losses   (49,595)   (52,333)
Reimbursement for retirement and pension benefits paid (G0):          
- monthly flow (payments) (iii) and (iv)   13,376    11,930 
- GESP Agreement – 2015 (vi)   97,075    86,446 
           
Total current   205,793    173,657 
           
Noncurrent:          
    Agreement for the installment payment of sanitation services   1,361    1,361 
Reimbursement of additional retirement and pension benefits paid (G0):          
- GESP Agreement – 2015 (vi)   949,589    643,534 
           
Total noncurrent   950,950    644,895 
           
Total receivables   1,156,743    818,552 
           
Assets:          
Sanitation services   96,703    76,642 
Reimbursement of additional retirement and pension benefits (G0)   1,060,040    741,910 
           
Total   1,156,743    818,552 
           
Liabilities:          
Interest on capital payable   372,550    275,240 
           
Schedule of loan agreement through credit facility
               
   2022  2021  2020
          
Revenue from sanitation services   661,955    522,608    501,756 
Payments received from related parties   (632,501)   (439,349)   (520,881)
                
Payment received from reimbursement referring to Law 4,819/58   (186,690)   (179,787)   (173,874)