Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) - USD ($) $ in Millions	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 4,288.9			$ 3,407.1
Accumulated depreciation	(2,299.9)			(2,121.8)
Property, plant and equipment, net	1,989.0	$ 1,995.6	$ 1,297.4	1,285.3
Land [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	40.9			20.4
Building And Equipment [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	1,639.4			1,283.4
Capitalized Software Costs [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	304.8			294.7
Instruments [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	2,152.9			1,692.8
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property, plant and equipment, Gross	$ 150.9			$ 115.8