Disclosures About Derivative Instruments and Hedging Activities (Details)	3 Months Ended
	Mar. 31, 2013 Natural Gas [Member] USD ($)	Mar. 31, 2013 Iron Ore [Member] USD ($)	Mar. 31, 2013 Commodity Contract [Member] Nickel [Member] lb	Dec. 31, 2012 Commodity Contract [Member] Nickel [Member] lb	Mar. 31, 2013 Commodity Contract [Member] Natural Gas [Member] MMBTU	Dec. 31, 2012 Commodity Contract [Member] Natural Gas [Member] MMBTU	Mar. 31, 2013 Commodity Contract [Member] Iron Ore [Member] T	Dec. 31, 2012 Commodity Contract [Member] Iron Ore [Member] T	Mar. 31, 2013 Commodity Contract [Member] Hot Roll Carbon Steel Coils [Member] t	Dec. 31, 2012 Commodity Contract [Member] Hot Roll Carbon Steel Coils [Member] t	Mar. 31, 2013 Foreign Exchange Contract [Member] EUR (€)	Dec. 31, 2012 Foreign Exchange Contract [Member] EUR (€)
Derivative [Line Items]
Nonmonetary Notional Amount of Derivatives			243,100	420,100	9,750,000	9,000,000	855,000	1,140,000	0	30,000
Notional Amount of Foreign Currency Derivatives											€ 9,200,000	€ 15,950,000
Settlement Dates	April 2013 to December 2013	April 2013 to December 2013
Gains (losses) expected to be reclassified into cost of products sold within the next twelve months	$ 2,300,000	$ 14,900,000