Commitments and Contingencies - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended			84 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2014	Mar. 01, 2013	Jun. 10, 2011
Loss Contingencies [Line Items]
Certain claims selling, general and administrative, net	$ 21.5	$ 47.0	$ 15.0	$ 471.7
Self-insured retention amount	20.00%
Receivables in other assets	170.3			170.3
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
Monetary damages for lost profits	70.0
Estimated charges	70.0
Durom Cup Related Claims [Member]
Loss Contingencies [Line Items]
Estimated liability outstanding	357.2			357.2
Estimated liability classified as short-term	50.0			50.0
Estimated liability classified as long-term	$ 307.2			$ 307.2