Description of the Business and Significant Accounting Policies (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 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%	63.00%	60.00%	62.00%
Metals Recycling and Ferrous Resources Operations
Segment Reporting Information
Number of iron making initiatives			2
Percentage of external net sales	33.00%	31.00%	34.00%	33.00%
Steel Fabrication Operations
Segment Reporting Information
Percentage of external net sales	6.00%	5.00%	6.00%	4.00%