Employee Incentive Plans, Short Term Incentive Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Compensation charges associated with STI Plans
EVA measurement period	1 year
Costs recorded in connection with STI plans	$ 2.4	$ 4.1
Fabricated Products
Compensation charges associated with STI Plans
Costs recorded in connection with STI plans	1.9	2.9
All Other
Compensation charges associated with STI Plans
Costs recorded in connection with STI plans	0.5	1.2
Cost of products sold, excluding depreciation and amortization and other items
Compensation charges associated with STI Plans
Costs recorded in connection with STI plans	1.1	1.1
Selling, administrative, research and development, and general
Compensation charges associated with STI Plans
Costs recorded in connection with STI plans	$ 1.3	$ 3.0