Reportable Business Segments (Details 6) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Summary of financial information relating to geographic area based operations
Total net sales to external customers	$ 684.9	$ 809.7	$ 840.4	$ 614.4	$ 648.5	$ 801.2	$ 808.6	$ 582.6	$ 2,949.4	[1]	$ 2,840.9	[1]	$ 2,585.2	[1]
Total property, plant and equipment, net	298.2				300.7				298.2		300.7		308.5
United States [Member]
Summary of financial information relating to geographic area based operations
Total net sales to external customers									2,147.2		2,018.1		1,866.4
Total property, plant and equipment, net	227.9				233.4				227.9		233.4		215.0
Mexico [Member]
Summary of financial information relating to geographic area based operations
Total property, plant and equipment, net	28.0				28.0				28.0		28.0		33.0
Canada [Member]
Summary of financial information relating to geographic area based operations
Total net sales to external customers									226.7		219.2		214.5
Total property, plant and equipment, net	0.6				0.6				0.6		0.6		0.7
International [Member]
Summary of financial information relating to geographic area based operations
Total net sales to external customers									575.5		603.6		504.3
Total property, plant and equipment, net	$ 41.7				$ 38.7				$ 41.7		$ 38.7		$ 59.8

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