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Commitments and Contingencies - Additional Information (Detail) Claim in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 USD ($) Claim | Dec. 31, 2016 USD ($) Claim | Dec. 31, 2015 USD ($) Claim | Dec. 31, 2014 Claim
Other Commitments [Line Items] |  |  |  |
Asbestos-related liability and asset measurement period | 10 years |  |  |
Asbestos Related Matters [Member] |  |  |  |
Other Commitments [Line Items] |  |  |  |
Outstanding Active Pending Asbestos Claims | Claim | 26 | 30 | 37 | 62
Percentage of asbestos liability related to pending claims | 23.00% |  |  |
Percentage of Estimated Receivable from Insurers with A- or Better Credit Rating | 77.00% |  |  |
Percentage of Asbestos Asset Related to Coverage in Place Agreements | 42.00% |  |  |
Benefit from Settlement Agreement with Asbestos Insurers |  | $ 2.1 | $ (8.9) |
Change in Defense Cost Estimate for Asbestos Matters | $ 0.0 | 4.9 |  |
Continuing Operations [Member] | Asbestos Related Matters [Member] |  |  |  |
Other Commitments [Line Items] |  |  |  |
Change in Defense Cost Estimate for Asbestos Matters | $ 0.0 | $ (4.9) | $ (100.7) |

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- Definition Period over which the asbestos liability and related assets are measured for current pending claims and unasserted claims to be filed. + References No definition available. + 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=82911808&loc=d3e14435-108349 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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