Employee Incentive Plans (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Compensation charges associated with STI Plans
Total cost recorded in connection with STI plan	$ 2.3	$ 2.1	$ 4.5	$ 4.1
Cost of products sold [Member]
Compensation charges associated with STI Plans
Total cost recorded in connection with STI plan	0.8	0.7	1.9	1.3
Selling, administrative, research and development and general expenses [Member]
Compensation charges associated with STI Plans
Total cost recorded in connection with STI plan	1.5	1.4	2.6	2.8
Fabricated Products [Member]
Compensation charges associated with STI Plans
Total cost recorded in connection with STI plan	1.7	1.3	3.4	2.6
All Other [Member]
Compensation charges associated with STI Plans
Total cost recorded in connection with STI plan	$ 0.6	$ 0.8	$ 1.1	$ 1.5