Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 5,717.7	$ 5,437.1
Accumulated depreciation	(3,681.9)	(3,421.7)
Property, plant and equipment, net	2,035.8	2,015.4
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	27.9	28.0
Buildings And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,954.3	1,885.6
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	457.6	425.8
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	3,137.0	2,950.5
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 140.9	$ 147.2