Acquisitions - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended				1 Months Ended		3 Months Ended			1 Months Ended					1 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	May 20, 2010 Bard Sendirian Berhad	Apr. 12, 2010 FlowCardia, Inc.	Apr. 12, 2010 FlowCardia, Inc. Core Technologies	Dec. 31, 2011 Clearstream Technologies	Dec. 31, 2011 Clearstream Technologies Core Technologies Other Intangible Assets	Oct. 19, 2012 Neomend, Inc.	Oct. 19, 2012 Neomend, Inc. Core Technologies	Dec. 31, 2012 Lutonix, Inc.	Dec. 31, 2011 Lutonix, Inc.	Dec. 16, 2011 Lutonix, Inc.	Dec. 16, 2011 Lutonix, Inc. In-Process Research And Development	Dec. 16, 2011 Lutonix, Inc. Core Technologies	Nov. 10, 2011 Medivance, Inc.	Nov. 10, 2011 Medivance, Inc. Core Technologies	Nov. 10, 2011 Medivance, Inc. Customer Relationships	Jul. 06, 2010 SenoRX, Inc.	Jul. 06, 2010 SenoRX, Inc. Core Technologies
Business Acquisition [Line Items]
Business acquisition purchase price					$ 25.9	$ 80.1		$ 69.1		$ 133.7				$ 298.0			$ 255.5			$ 213.5
Business acquisition, contingent consideration										25.0		72.0		100.0
Business acquisition, contingent consideration payment due date										2016
Purchase price allocation, recognition of customer relationships and core technologies							46.4		29.1		62.8					33.4		75.9	88.7		95.1
Purchase price allocation at fair value, recognition of deferred tax assets						18.1		3.3		27.0				24.7			25.0			42.3
Purchase price allocation at fair value, recognition of deferred tax liabilities						19.3		3.8		36.0				59.5			63.3			44.0
Purchase price allocation at fair value, recognition of other net liabilities										1.9
Purchase price allocation at fair value, recognition of indefinite-lived intangible asset						4.7				29.4					131.5					12.8
Risk-adjusted discount rate										24.00%		20.00%
Purchase price allocation at fair value, goodwill						27.2		29.5		52.4				166.3			112.2			83.8
Estimated useful lives, years						11 years		10 years			15 years					12 years		14 years	13 years	10 years
Acquisition related transaction costs	3.8		3.8					2.6		1.3				1.4			1.7			3.2
Business acquisition, purchase consideration cash payment														228.0
Fair value of contingent consideration														70.0
Purchase price allocation at fair value, recognition of other net assets						3.0								1.6			17.0
Probability of payment of contingent consideration												75.00%	75.00%
Integration costs recorded to other (income) expense before tax	4.1	2.1	4.4	9.3				2.0									1.8
Integration costs recorded to other (income) expense after tax								1.8									1.1
Assets acquired in acquisition								11.0												23.5
Business acquisition purchase price per share																				$ 11.00
Acquisition costs, termination of agreements																				6.9
Acquisition costs, termination of agreements, after tax																				4.2
Excess of cash paid over the carrying amount of the noncontrolling interest					$ 13.2
Business acquisition percentage of common shares acquired					15.00%