Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net sales	$ 1,025.4	$ 1,004.0	$ 1,994.6	$ 1,973.1
Cost of goods sold	834.0	839.5	1,629.2	1,655.8
Gross profit	191.4	164.5	365.4	317.3
Selling, general and administrative expenses	79.9	70.6	155.5	139.1
Operating income	111.5	93.9	209.9	178.2
Interest expense	(23.4)	(24.8)	(47.0)	(49.9)
Investment income	1.5	0.6	2.1	1.4
Other income, net	2.1	1.8	3.1	4.2
Income before income taxes	91.7	71.5	168.1	133.9
Income tax expense	20.7	12.9	36.0	22.1
Net income	$ 71.0	$ 58.6	$ 132.1	$ 111.8
Basic earnings per share	$ 0.91	$ 0.75	$ 1.69	$ 1.44
Diluted earnings per share	$ 0.90	$ 0.75	$ 1.68	$ 1.43