Description of the Business and Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Description of the Business and Significant Accounting Policies
Number of reporting segments			3
Steel Operations
Segment Reporting Information
Percentage of external net sales	61.00%	62.00%	60.00%	62.00%
Metals Recycling and Ferrous Resources Operations
Segment Reporting Information
Number of iron making initiatives			2
Percentage of external net sales	32.00%	31.00%	33.00%	32.00%
Steel Fabrication Operations
Segment Reporting Information
Percentage of external net sales	6.00%	6.00%	6.00%	5.00%