Business Combinations - Summary of Aggregate Preliminary Fair Values of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 10,643.9	$ 9,934.2	$ 2,514.2
Cayenne Medical, CTC, CDD and MedTech [Member]
Business Acquisition [Line Items]
Current assets	64.2
Property, plant and equipment	3.9
Intangible assets	211.3
Goodwill	340.0
Other assets	7.9
Total assets acquired	627.3
Current liabilities	13.6
Long-term liabilities	110.4
Total liabilities assumed	124.0
Net assets acquired	$ 503.3