Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 3,470.2	$ 3,410.6
Accumulated depreciation	(2,169.5)	(2,121.8)
Property, plant and equipment, net	1,300.7	1,288.8
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	20.1	20.4
Building And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,293.6	1,283.4
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	293.8	294.7
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,735.1	1,696.3
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 127.6	$ 115.8