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Brumadinho dam failure (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Brumadinho Dam Failure      
 Integral Reparation Agreement $ 52 $ (39)
  Other obligations (168) (437) (400)
  Incurred expenses (378) (484) (685)
  Insurance (i) 11 30 6
  Expenses related to Brumadinho event $ (483) $ (930) $ (1,079)