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Joint Ventures and Noncontrolling Interests (Details) - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2021
Mar. 30, 2020
Feralloy Processing Company      
Joint Ventures and Noncontrolling Interests      
Payments for acquired equity interest $ 8.0    
Carrying value of noncontrolling interest 1.1    
Increase to additional paid in capital for the direct tax effects resulting from the transaction $ 1.4    
Ownership percentage acquired 49.00%    
Ownership percentage in consolidated investments other than equity method investment 100.00%   51.00%
Indiana Pickling & Processing Company      
Joint Ventures and Noncontrolling Interests      
Ownership percentage in consolidated investments other than equity method investment   56.00%  
Valex Corp. | South Korea      
Joint Ventures and Noncontrolling Interests      
Ownership percentage in consolidated investments other than equity method investment   96.00%  
Minimum      
Joint Ventures and Noncontrolling Interests      
Ownership percentage in equity method investment   20.00%  
Percentage of ownership for consolidation of financial statements   50.00%  
Maximum      
Joint Ventures and Noncontrolling Interests      
Ownership percentage in equity method investment   50.00%