Condensed Consolidated Statements of Operations (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Condensed Consolidated Statements of Operations
Net sales	$ 470.1	$ 422.6	$ 931.8	$ 839.1
Cost of sales	341.0	305.8	673.5	610.3
Gross margin	129.1	116.8	258.3	228.8
Selling, general and administrative expenses	37.1	34.8	78.1	72.8
Research and technology expenses	10.9	10.1	24.5	21.1
Other operating expense	6.0		6.0
Operating income	75.1	71.9	149.7	134.9
Interest expense, net	2.0	2.1	3.8	3.8
Non-operating expense		1.0		1.0
Income before income taxes and equity in earnings of affiliated companies	73.1	68.8	145.9	130.1
Provision for income taxes	22.9	20.6	45.7	38.5
Income before equity in earnings of affiliated companies	50.2	48.2	100.2	91.6
Equity in earnings of affiliated companies	0.4	0.3	0.5	0.5
Net income	$ 50.6	$ 48.5	$ 100.7	$ 92.1
Basic net income per common share: (in dollars per share)	$ 0.52	$ 0.49	$ 1.03	$ 0.92
Diluted net income per common share: (in dollars per share)	$ 0.51	$ 0.48	$ 1.01	$ 0.90
Weighted average common shares outstanding:
Basic (in shares)	97.3	100.0	97.9	100.2
Diluted (in shares)	99.2	101.8	99.9	102.0