Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Net sales	$ 399.2	$ 353.7	$ 799.3	$ 685.3
Cost of sales	293.7	266.7	587.4	515.3
Gross margin	105.5	87.0	211.9	170.0
Selling, general and administrative expenses	32.5	29.7	69.1	62.6
Research and technology expenses	8.6	7.9	17.8	16.5
Other operating (income) expense	(9.5)		(9.5)	(5.7)
Operating income	73.9	49.4	134.5	96.6
Interest expense, net	3.0	2.9	6.0	7.1
Non-operating expense	1.1		1.1	4.9
Income before income taxes and equity in earnings of affiliated companies	69.8	46.5	127.4	84.6
Provision for income taxes	22.1	9.3	40.5	21.5
Income before equity in earnings of affiliated companies	47.7	37.2	86.9	63.1
Equity in earnings of affiliated companies	0.3	0.2	0.7	0.7
Net income	$ 48.0	$ 37.4	$ 87.6	$ 63.8
Basic net income per common share: (in dollars per share)	$ 0.48	$ 0.38	$ 0.88	$ 0.65
Diluted net income per common share: (in dollars per share)	$ 0.47	$ 0.37	$ 0.86	$ 0.63
Weighted average common shares outstanding:
Basic (in shares)	100.2	98.6	100.0	98.4
Diluted (in shares)	102.0	100.7	101.9	100.5