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Supplemental Guarantor Condensed Consolidating Financial Statements - Additional Information (Detail)	3 Months Ended
	Apr. 02, 2016 USD ($)		Mar. 28, 2015 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Percentage owned, domestic subsidiaries	1
Selling, general and administrative expenses allocated from Lear	$ 32,700,000		$ 30,800,000
Long-term Debt
Long-Term Debt, Net	1,954,900,000			$ 1,954,800,000
Less — Current portion	(26,400,000)	[1]		(23,100,000)
Long-term debt	1,928,500,000	[1]		$ 1,931,700,000
4.75% Senior Notes due 2023 | Senior notes
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount	$ 500,000,000
Long-term debt, stated coupon rate	4.75%			4.75%
5.375% Senior Notes due 2024 | Senior notes
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount	$ 325,000,000
Long-term debt, stated coupon rate	5.375%			5.375%
5.25% Senior Notes due 2025 | Senior notes
Debt Instrument [Line Items]
Long-term debt, aggregate principal amount	$ 650,000,000
Long-term debt, stated coupon rate	5.25%		8.125%	5.25%
Lear
Long-term Debt
Long-Term Debt, Net	$ 1,944,800,000			$ 1,947,200,000
Less — Current portion	(25,000,000)			(21,900,000)
Long-term debt	1,919,800,000			1,925,300,000
Lear | Senior notes
Long-term Debt
Long-Term Debt, Net	$ 1,459,300,000			1,458,800,000
Lear | 4.75% Senior Notes due 2023 | Senior notes
Debt Instrument [Line Items]
Long-term debt, stated coupon rate	4.75%
Lear | 5.375% Senior Notes due 2024 | Senior notes
Debt Instrument [Line Items]
Long-term debt, stated coupon rate	5.375%
Lear | 5.25% Senior Notes due 2025 | Senior notes
Debt Instrument [Line Items]
Long-term debt, stated coupon rate	5.25%
Term Loan Facility | Lear | Credit Agreement — Term Loan Facility
Long-term Debt
Long-Term Debt, Net	$ 485,500,000			$ 488,400,000
[1] Unaudited.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

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