Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net sales	$ 511.0	$ 536.1	$ 1,014.6	$ 1,029.7
Cost of sales	274.7	297.6	539.1	568.7
Gross profit	236.3	238.5	475.5	461.0
Selling, general and administrative expenses	75.6	85.1	149.0	168.3
Engineering - research and development	23.2	21.2	45.4	45.7
Loss associated with impairment of long-lived assets			1.3
Operating income	137.5	132.2	279.8	247.0
Interest income	0.2	0.2	0.4	0.4
Interest expense	(23.3)	(36.8)	(60.4)	(72.1)
Premiums and expenses on tender offer and redemption of long-term debt	(25.1)		(25.1)
Other (expense) income, net	(2.2)	(0.9)	0.6	(1.3)
Income before income taxes	87.1	94.7	195.3	174.0
Income tax expense	(32.7)	(37.5)	(72.5)	(64.7)
Net income	$ 54.4	$ 57.2	$ 122.8	$ 109.3
Basic earnings per share attributable to common stockholders	$ 0.30	$ 0.32	$ 0.68	$ 0.61
Diluted earnings per share attributable to common stockholders	0.30	0.31	0.68	0.59
Dividends declared per common share	$ 0.15	$ 0.12	$ 0.30	$ 0.24
Comprehensive income, net of tax	$ 55.3	$ 57.0	$ 111.8	$ 111.2