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Income Taxes Income Tax Valuation Allowance (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Valuation Allowance [Line Items]      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 107.4 $ 512.0 $ 135.2
Deferred Tax Assets, Valuation Allowance, Net 1,529.3 1,421.9 909.9
Tax Credit Carryforward, Valuation Allowance 105.4 531.0 83.6
Foreign Tax Jurisdiction      
Valuation Allowance [Line Items]      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 3.1 $ 6.5 $ 7.0
Valuation Allowance, Deferred Tax Asset, Explanation of Change 2.8 million 0.2 million 46.8 million
United States      
Valuation Allowance [Line Items]      
Operating Loss Carryforwards, Valuation Allowance     $ 1.5
Domestic Tax Jurisdiction      
Valuation Allowance [Line Items]      
Valuation Allowance, Deferred Tax Asset, Explanation of Change 11.3 million    
Vale Fertilizantes S.A.      
Valuation Allowance [Line Items]      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount $ 9.0 $ 12.7 $ 13.2