Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Consolidated Statements of Operations
Net sales	$ 1,678.2	$ 1,578.2	$ 1,392.4
Cost of sales	1,224.2	1,171.5	1,050.3
Gross margin	454.0	406.7	342.1
Selling, general and administrative expenses	141.4	130.7	120.5
Research and technology expenses	41.7	36.7	32.6
Other income, net		(9.5)	(3.0)
Operating income	270.9	248.8	192.0
Interest expense, net	7.3	10.0	11.6
Non-operating expense	1.0	1.1	4.9
Income before income taxes and equity in earnings	262.6	237.7	175.5
Provision for income taxes	76.0	74.1	41.6
Income before equity in earnings	186.6	163.6	133.9
Equity in earnings from investments in affiliated companies	1.3	0.7	1.6
Net income	$ 187.9	$ 164.3	$ 135.5
Basic net income per common share: (in dollars per share)	$ 1.88	$ 1.64	$ 1.37
Diluted net income per common share: (in dollars per share)	$ 1.84	$ 1.61	$ 1.35
Weighted average common shares outstanding:
Basic (in shares)	100.0	100.2	98.8
Diluted (in shares)	102.1	102.0	100.7