Derivative Financial Instruments (Schedule of Notional Amounts of Outstanding Derivative Positions) (Details) - Futures	6 Months Ended
Jun. 30, 2019 T
Aluminum \| Long
Derivative [Line Items]
Commodity contract (in MT/Lbs)	2,450
Aluminum \| Short
Derivative [Line Items]
Commodity contract (in MT/Lbs)	4,500
Copper \| Long
Derivative [Line Items]
Commodity contract (in MT/Lbs)	17,758
Copper \| Short
Derivative [Line Items]
Commodity contract (in MT/Lbs)	28,123

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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