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Summary of Significant Accounting Policies - Classification of Recoverable Customer Engineering, Development and Tooling Costs related to Long-Term Supply Agreements (Detail) (USD $) In Millions, unless otherwise specified | Dec. 31, 2014 | Dec. 31, 2013
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Pre Production Costs Related to Long Term Supply Arrangements [Line Items] |  |
Recoverable customer E&D and tooling | $ 168.7 us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized | $ 187.1 us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized
Other current assets |  |
Pre Production Costs Related to Long Term Supply Arrangements [Line Items] |  |
Recoverable customer E&D and tooling | 121.1 us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember | 134.2 us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember
Other long-term assets |  |
Pre Production Costs Related to Long Term Supply Arrangements [Line Items] |  |
Recoverable customer E&D and tooling | $ 47.6 us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember | $ 52.9 us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember

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- Definition The carrying amount as of the balance sheet date of capitalized preproduction costs incurred on long-term supply arrangements, including recoverable costs to design and develop products. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6387057&loc=d3e6169-108318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section 25 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6387057&loc=d3e6233-108318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 10 -Section S99 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=27011391&loc=d3e105117-122735 + Details
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