Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 5,083.7	$ 4,671.5
Accumulated depreciation	(3,045.1)	(2,633.6)
Property, plant and equipment, net	2,038.6	2,037.9
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	29.0	37.0
Building And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,838.5	1,789.9
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	421.6	397.2
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,683.9	2,347.6
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 110.7	$ 99.8