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Dissolution of Strategic Partnership (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 1 Months Ended 3 Months Ended 1 Months Ended
Dec. 31, 2012
Nov. 30, 2012
Sandvik Powdermet AB
Dec. 31, 2012
Sandvik Powdermet AB
Nov. 30, 2012
Sandvik
Carpenter Powder Products AB
Dissolution of strategic partnership        
Ownership interest (as a percent)   40.00%    
Ownership interest of noncontrolling partner (as a percent)       40.00%
Proceeds from sale of equity method investment $ 7.9 $ 7.9    
Payment to repurchase the shares 8.4     8.4
Gain related to the sale of the investment     1.9  
Gain (loss) recognized related to repurchase of minority interest       $ 0