Fair Value Measurements and Risk (Details) In Millions, unless otherwise specified						12 Months Ended
	Dec. 31, 2013 country	Dec. 31, 2013 Recurring basis Total USD ($)	Dec. 31, 2012 Recurring basis Total USD ($)	Dec. 31, 2013 Recurring basis Significant Other Observable Inputs (Level 2) USD ($)	Dec. 31, 2012 Recurring basis Significant Other Observable Inputs (Level 2) USD ($)	Dec. 31, 2013 Fixed Rate Natural Gas Swaps [Member] USD ($) MMBTU	Dec. 31, 2013 Fixed Rate Natural Gas Swaps Call Option [Member] MMBTU	Dec. 31, 2013 Fixed-rate aluminum swaps USD ($) lb	Dec. 31, 2013 Currency forward contracts EUR (€)
Items measured at Fair Value on a Recurring Basis
Maximum period of cash flow hedging						12 months	0 years 24 months	12 months
Nonmonetary Notional Amount of Price Risk Derivative Instruments Not Designated as Hedging Instruments						300,000	7,100,000	1,400,000
Total contract value						$ 1.2		$ 1.2
Total notional amount related to the remaining outstanding currency forward contracts									194.5
Number of countries where company does business, greater than	40
Number of Currencies in Which Entity Operates, Greater Than	50
Assets
Currency derivatives		2.1	1.2	2.1	1.2
Commodity derivatives		0	0.2	0	0.2
Total Assets		2.1	1.4	2.1	1.4
Liabilities
Currency derivatives		6.9	5.1	6.9	5.1
Commodity derivatives		0.1	0.4	0.1	0.4
Total Liabilities		$ 7.0	$ 5.5	$ 7.0	$ 5.5