Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property, Plant and Equipment
Property, plant and equipment, gross	$ 1,326.8	$ 1,272.8
Accumulated depreciation	(681.5)	(635.7)
Property, plant and equipment, net	645.3	637.1
Land
Property, Plant and Equipment
Property, plant and equipment, gross	49.0	45.8
Buildings and leasehold improvements
Property, Plant and Equipment
Property, plant and equipment, gross	338.1	311.9
Machinery and equipment
Property, Plant and Equipment
Property, plant and equipment, gross	880.0	845.2
Projects in progress
Property, Plant and Equipment
Property, plant and equipment, gross	$ 59.7	$ 69.9