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Provision for de-characterization of dam structures and asset retirement obligations (Tables)
 6 Months Ended
Jun. 30, 2024
Provision For De-characterization Of Dam Structures And Asset Retirement Obligations  
Schedule of changes in the provisions, de-characterization of dam structures located in Brazil
 
  Total
Balance as of December 31, 2023 3,451
Revision to estimates (131)
Disbursements (251)
Monetary and present value adjustments 91
Translation adjustment (422)
Balance as of June 30, 2024 2,738
   
Schedule of changes in the provision of asset retirement obligations and environmental obligations
         
  Liability   Discount rate   Cash flow maturity
  June 30, 2024 December 31, 2023 June 30, 2024 December 31,  2023 June 30, 2024 December 31, 2023
Liability by geographical area            
Brazil 1,914 2,415 6.41% 5.47% 2132 2132
Canada 1,529 1,592 1.47% 1.30% 2150 2150
Oman 159 158 3.46% 3.19% 2035 2035
Other regions 100 114 2.43% 2.04% - -
  3,702 4,279        
Operating plants 2,869 3,155        
Closed plants 833 1,124        
  3,702 4,279        
Schedule of provision changes during the year
     
   
  Asset retirement obligations

Environmental

obligations

 Total
Balance as of December 31, 2023 3,779 500 4,279
Disbursements (85) (36) (121)
Revision to estimates (201) 17 (184)
Monetary and present value adjustments 65 12 77
Translation adjustment (294) (55) (349)
Balance as of June 30, 2024 3,264 438 3,702