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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

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