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Supplemental Guarantor Condensed Consolidating Financial Statements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended			12 Months Ended	6 Months Ended	12 Months Ended	6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014 8.125% Senior Notes due 2020	Dec. 31, 2013 8.125% Senior Notes due 2020	Jun. 28, 2014 4.75% Senior Notes due 2023	Dec. 31, 2013 4.75% Senior Notes due 2023	Jun. 28, 2014 5.375% Senior Notes due 2024
Condensed Financial Statements, Captions [Line Items]
Long-term debt, aggregate principal amount					$ 245		$ 500		$ 325
Long-term debt, stated coupon rate					8.125%	8.125%	4.75%	4.75%	5.375%
Long-term debt, maturity date					Mar. 15, 2020	Mar. 15, 2020	Jan. 15, 2023	Jan. 15, 2023
Long-term debt, maturity year									2024
Selling, general and administrative expenses allocated from Lear	$ 29.2	$ 30.3	$ 59.8	$ 61.6

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Amount of corporate and division operating costs allocated between the Parent and its subsidiaries.

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Debt Instrument Maturity Date Year

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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-Name Accounting Standards Codification

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