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Brumadinho dam failure - Contingencies and other legal matters (Details)
ha in Thousands, R$ in Billions, $ in Billions
 1 Months Ended 12 Months Ended
Jul. 31, 2020
ha
item
Dec. 31, 2020
item
Aug. 26, 2020
BRL (R$)
Aug. 26, 2020
USD ($)
Contingencies        
Total number of requests   207    
Number of requests extinguished   204    
Provision of bank or insurance guarantee     R$ 26.7 $ 5.1
Environmental projects        
Contingencies        
Number of parks in which environmental projects will be done 7      
Area of property in which environmental projects will be done | ha 794