Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Income Statement [Abstract]
Net sales	$ 497.7	$ 471.8
Cost of sales	354.7	330.0
Gross margin	143.0	141.8
Selling, general and administrative expenses	47.4	46.7
Research and technology expenses	11.7	12.5
Operating income	83.9	82.6
Interest expense, net	5.6	1.9
Income before income taxes, and equity in earnings of affiliated companies	78.3	80.7
Provision for income taxes	22.7	12.9
Income before equity in earnings of affiliated companies	55.6	67.8
Equity in earnings from affiliated companies	0.4	0.3
Net income	$ 56.0	$ 68.1
Basic net income per common share:	$ 0.60	$ 0.71
Diluted net income per common share:	$ 0.59	$ 0.70
Weighted-average common shares:
Basic	93.4	96.2
Diluted	94.8	97.9