Property, Plant and Equipment - Summary of Property Plant and Equipment (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Property Plant And Equipment Useful Life And Values [Abstract]
Land	$ 21.8	$ 22.1
Buildings and equipment	1,279.6	1,232.8
Capitalized software costs	254.8	241.8
Instruments	1,630.3	1,579.8
Construction in progress	82.8	117.8
Property, plant and equipment, gross	3,269.3	3,194.3
Accumulated depreciation	(2,044.1)	(1,983.6)
Property, plant and equipment, net	$ 1,225.2	$ 1,210.7