Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Sep. 30, 2026	Dec. 31, 2025
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 7,602.3	$ 7,257.4
Accumulated depreciation	(5,291.9)	(5,050.3)
Property, plant and equipment, net	2,310.4	2,207.1
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	22.5	22.5
Buildings And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,487.3	2,419.8
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	631.8	623.8
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	4,132.5	3,905.0
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 328.2	$ 286.3