Acquisitions - Additional Information (Detail) (USD $)	12 Months Ended					12 Months Ended								12 Months Ended		12 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Indefinite useful life in process research and development	Dec. 31, 2012 Indefinite useful life tradenames	Dec. 31, 2012 Intellectual Property	Dec. 31, 2012 Trade names	Dec. 31, 2012 Customer Lists	Jun. 22, 2012 Hotspur Technologies	May 22, 2012 Semprus BioSciences	May 03, 2012 Axiom Technology Partners LLC	Apr. 05, 2012 EZ-Blocker Product Line	Oct. 23, 2012 LMA International N.V.	Oct. 23, 2012 laryngeal mask supraglottic	Dec. 31, 2012 Late-stage technology acquisition	Dec. 31, 2012 Minimum	Dec. 31, 2012 Minimum Intellectual Property	Dec. 31, 2012 Maximum	Dec. 31, 2012 Maximum Intellectual Property
Business Acquisition [Line Items]
Initial payment made on acquisition	$ 367,900,000							$ 15,000,000	$ 30,000,000	$ 7,500,000	$ 3,300,000	$ 292,200,000	$ 19,900,000
Aggregate contingent consideration paid on achievement of specified objectives	51,196,000	9,676,000													2,000,000		90,000,000
Fair value of the consideration at the date of acquisition	422,200,000
Estimated fair value of the consideration to be paid to former security holders	55,800,000
Working capital adjustment related to acquisition	1,500,000
Business acquisitions, transaction expenses	7,200,000
Business acquisitions, operating loss	8,100,000													12,700,000
Estimated fair value intangible assets acquired					70,700,000	65,300,000	44,600,000
Useful life of intangible assets acquired, years						10 years	15 years									10 years		20 years
Indefinite lived tradenames	379,400,000			63,300,000
Indefinite in-process lived research and development	$ 53,157,000		$ 46,900,000