Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 6,012.3	$ 5,916.8
Accumulated depreciation	(3,946.8)	(3,839.4)
Property, plant and equipment, net	2,065.5	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	2,044.9	2,007.0
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	486.5	482.4
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	3,311.8	3,250.5
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 141.6	$ 149.3