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Contingencies - Summary of Cumulative Trauma Product Liability Claims Activity (Detail) - LegalMatter	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Loss Contingency, Quantities [Roll Forward]
Open lawsuits/Pending claims, December 31	1,794
Lawsuits
Loss Contingency, Quantities [Roll Forward]
Open lawsuits/Pending claims, January 1	1,988	2,326	2,840
New lawsuits/claims	379	340	542
Settled and dismissed lawsuits/claims	(573)	(678)	(1,056)
Open lawsuits/Pending claims, December 31	1,794	1,988	2,326
Pending claims
Loss Contingency, Quantities [Roll Forward]
Open lawsuits/Pending claims, January 1	3,779	5,539	8,941
New lawsuits/claims	843	465	542
Settled and dismissed lawsuits/claims	(1,599)	(2,225)	(3,944)
Open lawsuits/Pending claims, December 31	3,023	3,779	5,539

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Loss Contingency, Quantities [Roll Forward]

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+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
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The total number of new claims filed pertaining to a loss contingency during the period.

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