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Derivatives and Hedging (Notional Values of Derivative Instruments) (Details) - Not Designated as Hedging Instrument
€ in Millions, ¥ in Millions, $ in Millions
Mar. 31, 2026
USD ($)
metricTon
Mar. 31, 2026
CNY (¥)
metricTon
Mar. 31, 2026
EUR (€)
metricTon
April 2026 - June 2026      
Derivative [Line Items]      
Notional values of foreign currency derivatives | $ $ 2.0    
Volume of copper derivatives (in metric tons per month) | metricTon 69 69 69
July 2026 - September 2026      
Derivative [Line Items]      
Notional values of foreign currency derivatives | $ $ 2.1    
Volume of copper derivatives (in metric tons per month) | metricTon 69 69 69
October 2026 - December 2026      
Derivative [Line Items]      
Notional values of foreign currency derivatives | $ $ 2.3    
Volume of copper derivatives (in metric tons per month) | metricTon 69 69 69
January 2027 - March 2027      
Derivative [Line Items]      
Notional values of foreign currency derivatives | $ $ 2.7    
Volume of copper derivatives (in metric tons per month) | metricTon 69 69 69
USD/CNY | Foreign Currency Derivatives      
Derivative [Line Items]      
Notional values of foreign currency derivatives $ 50.8 ¥ 352.0  
EUR/USD | Foreign Currency Derivatives      
Derivative [Line Items]      
Notional values of foreign currency derivatives $ 19.0   € 16.5