Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 3,410.6	$ 3,316.2
Accumulated depreciation	(2,121.8)	(2,091.5)
Property, plant and equipment, net	1,288.8	1,224.7	1,210.7
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	20.4	21.7
Building And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,283.4	1,353.1
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	294.7	272.6
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,696.3	1,610.6
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 115.8	$ 58.2