Derivative Financial Instruments (Schedule of Notional Amounts of Outstanding Derivative Positions) (Details)	12 Months Ended
Dec. 31, 2018 T
Aluminum \| Long
Derivative [Line Items]
Commodity contract (in MT/Lbs)	2,575
Aluminum \| Short
Derivative [Line Items]
Commodity contract (in MT/Lbs)	3,100
Copper \| Long
Derivative [Line Items]
Commodity contract (in MT/Lbs)	7,201
Copper \| Short
Derivative [Line Items]
Commodity contract (in MT/Lbs)	14,320

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.

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