Commitments and Contingencies - Other Litigation - Additional Information (Detail) - Product Liability And Occupational Exposure Litigation Claims - NL	9 Months Ended
Sep. 30, 2015 Cases Plaintiff
Loss Contingencies [Line Items]
Cases pending \| Cases	166
Pending Claims
Loss Contingencies [Line Items]
Number of plaintiffs involved	712
Administratively Dismissed Claims
Loss Contingencies [Line Items]
Number of plaintiffs involved	8,692

Number of pending claims pertaining to a loss contingency.

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

Name:	us-gaap_LossContingencyPendingClaimsNumber
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant