Reportable Business Segments (Details 6) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Summary of financial information relating to geographic area based operations
Net Sales	$ 755.8	$ 923.0	$ 937.0	$ 687.8	$ 762.0	$ 818.2	$ 872.1	$ 644.1	$ 3,303.6	$ 3,096.4	$ 2,847.5
Total property, plant and equipment, net	309.9				324.3				309.9	324.3
United States [Member]
Summary of financial information relating to geographic area based operations
Net Sales									2,370.8	2,255.4	2,033.1
Total property, plant and equipment, net	238.0				225.5				238.0	225.5
Canada [Member]
Summary of financial information relating to geographic area based operations
Net Sales									329.2	336.6	327.0
Total property, plant and equipment, net	5.2				6.0				5.2	6.0
Mexico [Member]
Summary of financial information relating to geographic area based operations
Total property, plant and equipment, net	28.0				33.0				28.0	33.0
International [Member]
Summary of financial information relating to geographic area based operations
Net Sales									603.6	504.4	487.4
Total property, plant and equipment, net	$ 38.7				$ 59.8				$ 38.7	$ 59.8