Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		78 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Mar. 01, 2013	Jun. 10, 2011
Loss Contingencies [Line Items]
Certain claims selling, general and administrative, net	$ 21.8	$ 47.0	$ 21.8	$ 47.0	$ 472.0
Self-insured retention amount			20.00%
Receivables in other assets	218.0		218.0		218.0
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
Stryker Corporation [Member]
Loss Contingencies [Line Items]
Number of patents infringed	3		3		3
Monetary damages for lost profits			70.0
Estimated charges	210.0		210.0		210.0
Durom Cup Related Claims [Member]
Loss Contingencies [Line Items]
Estimated liability outstanding	385.4		385.4		385.4
Estimated liability classified as short-term	50.0		50.0		50.0
Estimated liability classified as long-term	$ 335.4		$ 335.4		$ 335.4
Period for payment of majority of claims			5 years