Derivatives (Outstanding Contracts Designated as Cash Flow Hedges) (Details) - Designated as Hedging Instrument [Member] lb in Millions, MXN in Millions, CAD in Millions	Sep. 30, 2016 CAD lb	Sep. 30, 2016 MXN lb	Dec. 31, 2015 CAD lb	Dec. 31, 2015 MXN lb
Commodity Futures Contracts [Member]
Derivative [Line Items]
Derivative, nonmonetary notional amount (in lbs) | lb	31.6	31.6	34.7	34.7
Foreign Exchange Forward [Member] | Mexican Peso [Member]
Derivative [Line Items]
Derivative, notional amount | MXN		MXN 230.6		MXN 201.4
Foreign Exchange Forward [Member] | Canadian Dollar [Member]
Derivative [Line Items]
Derivative, notional amount | CAD	CAD 16.4		CAD 0.0