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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
Pre Production Costs Related to Long Term Supply Arrangements [Line Items]
Recoverable customer E&D and tooling	$ 168.7us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized	$ 187.1us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized
Other current assets
Pre Production Costs Related to Long Term Supply Arrangements [Line Items]
Recoverable customer E&D and tooling	121.1us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherCurrentAssetsMember	134.2us-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	$ 47.6us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember	$ 52.9us-gaap_PreproductionCostsRelatedToLongTermSupplyArrangementsCostsCapitalized / us-gaap_BalanceSheetLocationAxis = us-gaap_OtherNoncurrentAssetsMember

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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

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