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Related Party Transactions - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Related Party Transaction [Line Items]        
Net sales $ 404.9 $ 350.6 $ 1,321.5 $ 925.3
Glencore [Member]        
Related Party Transaction [Line Items]        
Net sales 404.9 350.6 1,321.5 925.3
Glencore [Member] | Supply Commitment [Member]        
Related Party Transaction [Line Items]        
Net sales $ 4.9 $ 5.5 $ 18.8 $ 16.9
Consolidated sales [Member] | Customer concentration risk [Member] | Glencore [Member]        
Related Party Transaction [Line Items]        
Major customer, percentage of revenue, net (percent) 63.50% 60.30%    
Glencore [Member]        
Related Party Transaction [Line Items]        
Ownership percentage by noncontrolling owners 42.90%   42.90%  
Economic ownership percentage by related party 46.30%   46.30%