Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 400.1	$ 331.6
Cost of sales	293.7	248.6
Gross margin	106.4	83.0
Selling, general and administrative expenses	36.6	32.9
Research and technology expenses	9.2	8.6
Other operating (income)		(5.7)
Operating income	60.6	47.2
Interest expense, net	3.0	4.2
Non-operating expense		4.9
Income before income taxes and equity in earnings of affiliated companies	57.6	38.1
Provision for income taxes	18.4	12.2
Income before equity in earnings of affiliated companies	39.2	25.9
Equity in earnings of affiliated companies	0.4	0.5
Net income	$ 39.6	$ 26.4
Net income per common share:
Basic (in dollars per share)	$ 0.40	$ 0.27
Diluted (in dollars per share)	$ 0.39	$ 0.26
Weighted average common shares outstanding:
Basic (in shares)	99.8	98.2
Diluted (in shares)	101.7	100.4