| Acquisitions (Detail) - Armstrong Aerospace, Inc. - USD ($) $ in Millions | 6 Months Ended | |
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| Jan. 14, 2015 | Jul. 02, 2016 | |
| Business Acquisition | ||
| Date of acquisition | Jan. 14, 2015 | |
| Percentage of acquired stock | 100.00% | |
| Business acquisition purchase price paid in cash | $ 52.6 | |
| Goodwill and purchased intangible assets deductible for tax purposes period (in years) | 15 years | 
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- Definition Business Acquisition, Goodwill and Intangible Assets, Expected Tax Deductible Period No definition available. 
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- Definition Date when the acquirer obtains control of the acquiree, in CCYY-MM-DD format. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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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. No definition available. 
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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The cash outflow associated with the acquisition of business during the period. The cash portion only of the acquisition price. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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