Commitments and Contingencies - Additional Information (Detail) $ in Millions	1 Months Ended			3 Months Ended			6 Months Ended		90 Months Ended
	Jul. 31, 2015 USD ($)	Mar. 31, 2014 Patents	Dec. 31, 2008 EUR (€)	Jun. 30, 2015 USD ($) Patents	Dec. 31, 2014 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Patents	Jun. 30, 2014 USD ($)	Jun. 30, 2015 USD ($) Patents	Mar. 03, 2013 Patents	Mar. 01, 2013 USD ($)	Jan. 15, 2013 Patents	Sep. 10, 2012 Patents	Jun. 10, 2011 USD ($)
Loss Contingencies [Line Items]
Certain claims				$ 7.7		$ 21.8	$ 7.7	$ 21.8
Compensatory damages awarded							$ 27.6
Percentage of fault apportioned to plaintiffs							30.00%
Percentage of fault apportioned to company							34.00%
Percentage of fault apportioned to unrelated third party							36.00%
Verdict in full and entered judgment														$ 20.3
Compensatory damages vacated											$ 27.6
Number of additional patents infringed | Patents												3
Durom Cup Related Claims [Member]
Loss Contingencies [Line Items]
Certain claims related expense							$ 21.8		$ 479.4
Certain claims				7.7			7.7
Estimated liability outstanding				333.1			333.1		333.1
Estimated liability classified as short-term				50.0			50.0		50.0
Estimated liability classified as long-term				283.1			283.1		283.1
Durom Cup Related Claims [Member] | Other Assets [Member]
Loss Contingencies [Line Items]
Estimated insurance recoveries				95.3			95.3		95.3
Durom Cup Related Claims [Member] | Accounts Receivable Net [Member]
Loss Contingencies [Line Items]
Estimated insurance recoveries				67.5			67.5		67.5
Biomet Metal On Metal Hip Implant Claims [Member]
Loss Contingencies [Line Items]
Estimated liability classified as short-term				$ 55.8			$ 55.8		$ 55.8
Heraeus Trade Secret Misappropriation Lawsuits [Member] | Minimum [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages incurred | €			€ 30,000,000
Stryker Corporation [Member]
Loss Contingencies [Line Items]
Number of patents infringed | Patents				3			3		3
Monetary damages for lost profits							$ 70.0
Estimated charges					$ 70.0
Stryker Corporation [Member] | Subsequent Event [Member]
Loss Contingencies [Line Items]
Estimated charges	$ 90.3
Bonutti Patent Infringement Lawsuits [Member]
Loss Contingencies [Line Items]
Number of patents infringed | Patents										15
Estimated charges							$ 4.0
Claims related to patents settled at one time payment | Patents		5
U S Patents [Member]
Loss Contingencies [Line Items]
Number of patents infringed | Patents													3
Inter Partes Review [Member]
Loss Contingencies [Line Items]
Number of patents granted | Patents												2
Number of patents requested | Patents												3