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Provision for de-characterization of dam structures and asset retirement obligations (Tables)
 12 Months Ended
Dec. 31, 2024
Provision For De-characterization Of Dam Structures And Asset Retirement Obligations  
Schedule of provision for effects in income statements
       
  Notes 2024 2023 2022
De-characterization of upstream geotechnical structures 28(a) 206 (153) (72)
Asset retirement obligations 28(b) 16 (5) (23)
Environmental obligations 28(b)                            (50) (71) (33)
 Total provision for income statement   172 (229) (128)
Schedule of changes in the provisions, de-characterization of dam structures located in Brazil
       
  De-characterization of upstream geotechnical structures Asset retirement obligations Environmental obligations Total
Balance as of December 31, 2023 3,451 3,779 499 7,729
Revision to estimates - amounts for closed plants charged to the income statement (i) (206) (16) 50 (172)
Revision to estimates – capitalized amounts for operating plants - (12) 33 21
Disbursements (533) (218) (90) (841)
Acquisition of Aliança Energia - 3 20 23
Monetary and present value adjustments 185 108 27 320
Translation adjustment (684) (538) (95) (1,317)
Balance as of December 31, 2024 2,213 3,106 444 5,763

 

(i)Includes the reduction of the liability for the de-characterization of upstream geotechnical structures in the amount of US$206, substantially due to the update in the discount rate, which increased from 5.41% on December 31, 2023, to 7.36% on December 31, 2024. The cash flows of the obligations are projected over a period of up to 14 years.
Schedule of changes in the provision of asset retirement obligations and environmental obligations
         
  Liability   Discount rate   Cash flow maturity
  December 31, 2024 December 31, 2023 December 31, 2024 December 31, 2023 December 31, 2024 December 31, 2023
Liability by geographical area            
Brazil 1,784 2,415 7.38% 5.47% 2132 2132
Canada 1,520 1,592 1.44% 1.30% 2152 2150
Oman 142 158 3.66% 3.19% 2035 2035
Other regions 104 113 2.77% 2.04% - -
  3,550 4,278        
Operating plants 2,509 3,155        
Closed plants 1,041 1,123        
  3,550 4,278