Disclosures About Derivative Instruments and Hedging Activities (Details)	9 Months Ended
	Sep. 30, 2012 Natural Gas [Member] USD ($)	Sep. 30, 2012 Zinc [Member] USD ($)	Sep. 30, 2012 Electricity [Member] USD ($)	Sep. 30, 2012 Iron Ore [Member] USD ($)	Sep. 30, 2012 Commodity Contract [Member] Nickel [Member] lb	Dec. 31, 2011 Commodity Contract [Member] Nickel [Member] lb	Sep. 30, 2012 Commodity Contract [Member] Natural Gas [Member] MMBtu	Dec. 31, 2011 Commodity Contract [Member] Natural Gas [Member] MMBtu	Sep. 30, 2012 Commodity Contract [Member] Zinc [Member] lb	Dec. 31, 2011 Commodity Contract [Member] Zinc [Member] lb	Sep. 30, 2012 Commodity Contract [Member] Electricity [Member] MWh	Dec. 31, 2011 Commodity Contract [Member] Electricity [Member] MWh	Sep. 30, 2012 Commodity Contract [Member] Iron Ore [Member] Metric_Ton	Dec. 31, 2011 Commodity Contract [Member] Iron Ore [Member] Metric_Ton	Sep. 30, 2012 Foreign Exchange Contract [Member] EUR (€)	Dec. 31, 2011 Foreign Exchange Contract [Member] EUR (€)
Derivative [Line Items]
Nonmonetary Notional Amount of Derivatives					627,700	545,500	7,700,000	28,700,000	7,500,000	21,000,000	25,600	0	990,000	294,000
Notional Amount of Foreign Currency Derivatives															€ 15,690,000	€ 13,050,000
Settlement Dates	October 2012 to December 2012	October 2012 to December 2012	October 2012 to December 2012	October 2012 to December 2013
Gains (losses) expected to be reclassified into cost of products sold within the next twelve months	$ (1,200,000)	$ 400,000	$ 100,000	$ (6,800,000)