Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 6,637.5	$ 6,324.9
Accumulated depreciation	(4,629.3)	(4,277.2)
Property, plant and equipment, net	2,008.2	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	2,278.3	2,197.8
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	477.6	455.8
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	3,732.8	3,518.3
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 121.4	$ 125.3

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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