Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Property Plant and Equipment Useful Life And Values [Abstract]
Land	$ 20.7	$ 21.7
Buildings and equipment	1,342.7	1,353.1
Capitalized software costs	289.1	272.6
Instruments	1,718.4	1,610.6
Construction in progress	94.7	58.2
Property, plant and equipment, Gross	3,465.6	3,316.2
Accumulated depreciation	(2,186.6)	(2,091.5)
Property, plant and equipment, net	$ 1,279.0	$ 1,224.7