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Other Noncurrent Assets (Parenthetical) (Detail) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014
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Other Noncurrent Assets Disclosure [Line Items] |  |  |
Accumulated amortization of identifiable intangibles | $ 117.5 | $ 103.6 | $ 77.2

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- Definition Other Noncurrent Assets Disclosure [Line Items] + References No definition available. + Details
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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