Employee Incentive Plans, STI Compensation Expense Table (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Compensation charges associated with STI Plans
Total costs recorded in connection with STI plans	$ 1.9	$ 1.7	$ 6.4	$ 5.8
Cost of products sold [Member]
Compensation charges associated with STI Plans
Total costs recorded in connection with STI plans	0.6	0.8	2.5	2.1
Selling, administrative, research and development and general [Member]
Compensation charges associated with STI Plans
Total costs recorded in connection with STI plans	1.3	0.9	3.9	3.7
Fabricated Products [Member]
Compensation charges associated with STI Plans
Total costs recorded in connection with STI plans	1.3	1.3	4.7	3.9
All Other [Member]
Compensation charges associated with STI Plans
Total costs recorded in connection with STI plans	$ 0.6	$ 0.4	$ 1.7	$ 1.9