Property, Plant and Equipment - Summary of Property Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Property Plant And Equipment Useful Life And Values [Abstract]
Land	$ 21.8	$ 22.1
Buildings and equipment	1,301.9	1,232.8
Capitalized software costs	268.3	241.8
Instruments	1,656.5	1,579.8
Construction in progress	89.6	117.8
Property, plant and equipment, gross	3,338.1	3,194.3
Accumulated depreciation	(2,104.0)	(1,983.6)
Property, plant and equipment, net	$ 1,234.1	$ 1,210.7