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Related-party balances and transactions (Tables)
 3 Months Ended
Mar. 31, 2024
Notes and other explanatory information [abstract]  
Schedule of accounts receivable, interest on capital, revenues, and expenses
   
 

March 31, 2024

December 31, 2023

Accounts receivable    
Current:    
Sanitation services 167,608 169,515
Allowance for losses (51,078) (50,498)
Reimbursement of additional retirement and pension benefits paid (G0):    
- Monthly flow 41,929 36,241
- GESP Agreement – 2015

108,203

106,022

     
Total current

266,662

261,280

     
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

930,947

933,911

     
Total noncurrent

932,308

935,272

     
Total receivables

1,198,970

1,196,552

     
Assets:    
Sanitation services 117,891 120,378
Reimbursement of additional retirement and pension benefits paid (G0)

1,081,079

1,076,174

     
Total

1,198,970

1,196,552

     
Liabilities:    
Interest on capital payable 420,564 420,564
Schedule of loan agreement through credit facility
   
 

January to March

2023

January to March

2024

     
Revenue from sanitation services 162,966 186,144
Payments from related parties (167,612) (186,205)
     
Payment received from reimbursement referring to Law 4,819/1958 (52,593) (47,816)