Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net sales	$ 1,392.4	$ 1,173.6	$ 1,108.3
Cost of sales	1,050.3	891.0	859.8
Gross margin	342.1	282.6	248.5
Selling, general and administrative expenses	120.5	118.5	107.2
Research and technology expenses	32.6	30.8	30.1
Other (income) expense, net	(3.0)	3.5	7.5
Operating income	192.0	129.8	103.7
Interest expense, net	11.6	23.2	26.1
Non-operating expense	4.9	6.8
Income before income taxes and equity in earnings	175.5	99.8	77.6
Provision for income taxes	41.6	22.9	22.0
Income before equity in earnings	133.9	76.9	55.6
Equity in earnings from investments in affiliated companies	1.6	0.5	0.7
Net income	$ 135.5	$ 77.4	$ 56.3
Basic net income per common share: (in dollars per share)	$ 1.37	$ 0.79	$ 0.58
Diluted net income per common share: (in dollars per share)	$ 1.35	$ 0.77	$ 0.57
Weighted average common shares outstanding:
Basic (in shares)	98.8	97.6	96.9
Diluted (in shares)	100.7	99.9	98.2