XML 50 R40.htm IDEA: XBRL DOCUMENT v3.20.2
Hedging Transactions and Derivative Financial Instruments (Notional Values of Derivative Instruments) (Details)
Jun. 30, 2020
USD ($)
tons_per_month
Jun. 30, 2020
KRW (₩)
tons_per_month
Jun. 30, 2020
EUR (€)
tons_per_month
Contracts not designated as hedging instruments | USD/CNH | Foreign Exchange Forward      
Derivative [Line Items]      
Notional Values of Foreign Currency Derivatives | $ $ 25,492,958    
Contracts not designated as hedging instruments | EUR/USD | Foreign Exchange Forward      
Derivative [Line Items]      
Notional Values of Foreign Currency Derivatives | €     € 8,018,710
Contracts not designated as hedging instruments | KRW/USD | Foreign Exchange Forward      
Derivative [Line Items]      
Notional Values of Foreign Currency Derivatives | ₩   ₩ 11,961,700,000  
Contract designated as hedging instrument | July 2020 - September 2020      
Derivative [Line Items]      
Volume of Copper Derivatives (in metric tons per month) 201 201 201
Contract designated as hedging instrument | October 2020 - December 2020      
Derivative [Line Items]      
Volume of Copper Derivatives (in metric tons per month) 201 201 201
Contract designated as hedging instrument | January 2021 - March 2021      
Derivative [Line Items]      
Volume of Copper Derivatives (in metric tons per month) 256 256 256
Contract designated as hedging instrument | April 2021 - June 2021      
Derivative [Line Items]      
Volume of Copper Derivatives (in metric tons per month) 256 256 256
Contract designated as hedging instrument | July 2021 - September 2021      
Derivative [Line Items]      
Volume of Copper Derivatives (in metric tons per month) 171 171 171