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Goodwill and Other Intangible Assets - Goodwill (Details)
12 Months Ended
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Aug. 13, 2021
USD ($)
Jun. 30, 2020
Mar. 31, 2020
USD ($)
Jun. 03, 2019
USD ($)
Goodwill [Line Items]              
Goodwill $ 227,900,000 $ 240,700,000          
Period increase (decrease) in goodwill (12,800,000)            
Impairment of goodwill 0 (287,000,000) $ 0        
Accumulated goodwill impairment $ 528,000,000 $ 528,000,000 $ 241,000,000        
Flowform Products              
Goodwill [Line Items]              
Goodwill       $ 12,200,000      
Weighted average cost of capital | Fair Value, Inputs, Level 3 [Member]              
Goodwill [Line Items]              
Goodwill, fair value measurement input 0.113            
Long-term growth rate | Fair Value, Inputs, Level 3 [Member] | Minimum              
Goodwill [Line Items]              
Goodwill, fair value measurement input 0.03            
Long-term growth rate | Fair Value, Inputs, Level 3 [Member] | Maximum              
Goodwill [Line Items]              
Goodwill, fair value measurement input 0.035            
High Performance Materials & Components              
Goodwill [Line Items]              
Goodwill $ 227,900,000            
Impairment of goodwill 0            
Goodwill, Foreign Currency Translation Gain (Loss) (600,000)            
Forged Products              
Goodwill [Line Items]              
Goodwill $ 161,200,000         $ 460,400,000 $ 10,400,000
Percentage of fair value in excess of carrying value 40.00%   30.00%        
Forged Products | Weighted average cost of capital | Fair Value, Inputs, Level 3 [Member]              
Goodwill [Line Items]              
Goodwill, fair value measurement input         0.116    
Forged Products | Long-term growth rate | Fair Value, Inputs, Level 3 [Member]              
Goodwill [Line Items]              
Goodwill, fair value measurement input         0.035    
Specialty Materials [Member]              
Goodwill [Line Items]              
Goodwill $ 66,700,000