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Hedging Transactions and Derivative Financial Instruments (Volume of Copper Derivatives) (Details) - Contracts not designated as hedging instruments | Dec. 31, 2020 tons_per_month
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January 2021 - March 2021 |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |
Volume of copper derivatives | 256
April 2021 - June 2021 |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |
Volume of copper derivatives | 256
July 2021 - September 2021 |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |
Volume of copper derivatives | 222
October 2021 - December 2021 |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |
Volume of copper derivatives | 222

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- Definition Nominal number of units used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
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