Derivatives (Outstanding Commodity Futures Contracts) (Details) - lb lb in Millions	Dec. 31, 2015	Dec. 31, 2014
Copper [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amounts	3.3	2.9
Copper [Member] | Cash Flow Hedging [Member]
Derivative [Line Items]
Notional Amounts	34.7	29.4
Aluminum [Member] | Not Designated as Hedging Instrument [Member]
Derivative [Line Items]
Notional Amounts	3.2	2.2