Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 866.8	$ 815.9
Less accumulated depreciation and amortization	424.1	388.2
Net property, plant and equipment	442.7	427.7
Land
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	10.8	11.2
Building
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	237.9	230.6
Equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	530.9	504.5
Software Development
Property, Plant and Equipment [Line Items]
Property, plant and equipment, gross	$ 87.2	$ 69.6