Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Net sales	$ 1,861.2	$ 1,855.5	$ 1,678.2
Cost of sales	1,328.4	1,346.7	1,224.2
Gross margin	532.8	508.8	454.0
Selling, general and administrative expenses	156.1	149.1	141.4
Research and technology expenses	44.3	47.9	41.7
Other expense (income), net		6.0
Operating income	332.4	305.8	270.9
Interest expense, net	14.2	8.0	7.3
Non-operating expense		0.5	1.0
Income before income taxes and equity in earnings	318.2	297.3	262.6
Provision for income taxes	83.0	89.3	76.0
Income before equity in earnings	235.2	208.0	186.6
Equity in earnings from investments in affiliated companies	2.0	1.4	1.3
Net income	$ 237.2	$ 209.4	$ 187.9
Basic net income per common share:	$ 2.48	$ 2.16	$ 1.88
Diluted net income per common share:	$ 2.44	$ 2.12	$ 1.84
Weighted average common shares outstanding:
Basic	95.8	96.8	100.0
Diluted	97.2	98.7	102.1