Quarterly Financial Information (unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Summary of information on net sales, gross profit, net income, earnings per share and dividends per share
Net Sales	$ 749.5	$ 868.0	$ 913.1	$ 668.4	$ 684.9	$ 809.7	$ 840.4	$ 614.4	$ 3,199.1	[1]	$ 2,949.4	[1]	$ 2,840.9	[1]
Gross Profit	207.7	237.4	254.0	162.0	168.4	204.9	208.1	140.9	861.2		722.3		669.9
Net income	$ 35.2	$ 64.3	$ 64.3	$ 8.0	$ 21.9	$ 29.4	$ 44.7	$ (6.1)	$ 171.8		$ 90.0		$ 88.3
Basic Earnings (Loss) per Share	$ 0.72	$ 1.29	$ 1.28	$ 0.16	$ 0.44	$ 0.58	$ 0.88	$ (0.12)	$ 3.45		$ 1.77		$ 1.68
Diluted Earnings (Loss) per Share	$ 0.70	$ 1.27	$ 1.26	$ 0.16	$ 0.43	$ 0.57	$ 0.87	$ (0.12)	$ 3.39		$ 1.75		$ 1.65
Dividends per Common Share	$ 0.24	$ 0.24	$ 0.24	$ 0.2	$ 0.2	$ 0.2	$ 0.18	$ 0.18	$ 0.92		$ 0.76		$ 0.72

[1] On a consolidated basis, no revenue from transactions with a single customer were 10% or greater of our consolidated net sales for any of the periods presented.