Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 6,130.0	$ 5,916.8
Accumulated depreciation	(4,073.5)	(3,839.4)
Property, plant and equipment, net	2,056.5	2,077.4
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	27.5	27.6
Buildings And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,097.9	2,007.0
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	489.5	482.4
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	3,373.9	3,250.5
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 141.2	$ 149.3