Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 6,398.6	$ 6,324.9
Accumulated depreciation	(4,376.7)	(4,277.2)
Property, plant and equipment, net	2,021.9	2,047.7
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	27.4	27.7
Buildings And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,213.6	2,197.8
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	456.0	455.8
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	3,590.1	3,518.3
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 111.5	$ 125.3