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Other income, net - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 9 Months Ended
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Sep. 30, 2012
Disclosure Other Income Net Additional Information Detail [Line Items] |
Litigation settlement gain | $ 14.7
Real estate-related litigation settlement | 15.6
NL | Certain Real Property Litigation Settlement |
Disclosure Other Income Net Additional Information Detail [Line Items] |
Litigation settlement gain | 14.7
Real estate-related litigation settlement | $ 15.6

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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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- Definition Cash received for the settlement of litigation during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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Period Type: | duration

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- Details
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