Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Consolidated Statements of Operations
Net sales	$ 1,578.2	$ 1,392.4	$ 1,173.6
Cost of sales	1,171.5	1,050.3	891.0
Gross margin	406.7	342.1	282.6
Selling, general and administrative expenses	130.7	120.5	118.5
Research and technology expenses	36.7	32.6	30.8
Other (income) expense, net	(9.5)	(3.0)	3.5
Operating income	248.8	192.0	129.8
Interest expense, net	10.0	11.6	23.2
Non-operating expense	1.1	4.9	6.8
Income before income taxes and equity in earnings	237.7	175.5	99.8
Provision for income taxes	74.1	41.6	22.9
Income before equity in earnings	163.6	133.9	76.9
Equity in earnings from investments in affiliated companies	0.7	1.6	0.5
Net income	$ 164.3	$ 135.5	$ 77.4
Basic net income per common share: (in dollars per share)	$ 1.64	$ 1.37	$ 0.79
Diluted net income per common share: (in dollars per share)	$ 1.61	$ 1.35	$ 0.77
Weighted average common shares outstanding:
Basic (in shares)	100.2	98.8	97.6
Diluted (in shares)	102.0	100.7	99.9