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Summary of Long-Term Debt of Lear and Guarantors on Combined Basis (Detail) (USD $) In Millions, unless otherwise specified | Mar. 29, 2014 | Dec. 31, 2013
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Condensed Financial Information Of Parent Company Only Disclosure [Abstract] |  |  |
Senior notes | $ 1,068.6 | [1] | $ 1,057.1
[1] | Unaudited.

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- Definition Carrying value as of the balance sheet date of uncollateralized debt obligation (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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