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Provision for de-characterization of dam structures and asset retirement obligations (Tables)
 12 Months Ended
Dec. 31, 2023
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, 2021 3,464
Revision to estimates and new provisions 72
Disbursements (347)
Monetary and present value adjustments (139)
Translation adjustment 249
Balance as of December 31, 2022 3,299
Revision to estimates and new provisions 153
Disbursements (458)
Monetary and present value adjustments 199
Translation adjustment 258
Balance as of December 31, 2023 3,451
Schedule of changes in the provision of asset retirement obligations and environmental obligations
             
    Liability   Discount rate Cash flow maturity
  Notes December 31, 2023 December 31, 2022 December 31, 2023 December 31, 2022 December 31, 2023 December 31, 2022
Liability by geographical area              
Brazil   2,415 1,863 5.47% 6.20% 2132 2096
Canada   1,592 1,683 1.30% 1.11% 2150 2151
Oman   158 114 3.19% 3.90% 2035 2035
Indonesia 16(b) - 73 - 4.33% - 2061
Other regions   114 149 2.04% 1.92% - -
    4,279 3,882        
Operating plants   3,155 2,971        
Closed plants   1,124 911        
    4,279 3,882        
Schedule of provision changes during the year
     
   
  Asset retirement obligations

Environmental

obligations

 Total
Balance on December 31, 2021 4,342 297 4,639
Disbursements (101) (26) (127)
Revision to estimates and new provisions (i) (684) 46 (638)
Transfer to assets held for sale (49) (2) (51)
Monetary and present value adjustments 78 7 85
Translation adjustment (41) 15 (26)
Balance on December 31, 2022 3,545 337 3,882
Disbursements (172) (101) (273)
Revision to estimates and new provisions 206 219 425
Transfer to assets held for sale (84) - (84)
Monetary and present value adjustments 126 17 143
Translation adjustment 158 28 186
Balance on December 31, 2023 3,779 500 4,279

 

(i) Among other factors, includes the reduction in liability of US$870, due to the update in the discount rate of the asset retirement obligation in Canada, which increased from 0.00% to 1.11% for the year ended December 31, 2022.