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Contingencies - Summary of Cumulative Trauma Product Liability Claims Activity (Detail) | 12 Months Ended
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Dec. 31, 2014 LegalMatter | Dec. 31, 2013 LegalMatter | Dec. 31, 2012 LegalMatter
Loss Contingency, Quantities [Roll Forward] |  |  |
Open lawsuits, January 1 | 2,840 us-gaap_LossContingencyPendingClaimsNumber | 2,609 us-gaap_LossContingencyPendingClaimsNumber | 2,321 us-gaap_LossContingencyPendingClaimsNumber
New lawsuits | 542 us-gaap_LossContingencyNewClaimsFiledNumber | 489 us-gaap_LossContingencyNewClaimsFiledNumber | 750 us-gaap_LossContingencyNewClaimsFiledNumber
Settled and dismissed lawsuits | (1,056)us-gaap_LossContingencyClaimsSettledAndDismissedNumber | (258)us-gaap_LossContingencyClaimsSettledAndDismissedNumber | (462)us-gaap_LossContingencyClaimsSettledAndDismissedNumber
Open lawsuits, December 31 | 2,326 us-gaap_LossContingencyPendingClaimsNumber | 2,840 us-gaap_LossContingencyPendingClaimsNumber | 2,609 us-gaap_LossContingencyPendingClaimsNumber

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- Details
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- Definition The number of claims settled and dismissed during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
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- Definition The total number of new claims filed pertaining to a loss contingency during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14435-108349 + Details
Name: | us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant