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Segment Reporting - Summary of Segment Financial Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Apr. 02, 2016		Mar. 28, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenues from external customers	$ 4,662.9		$ 4,521.4
Segment earnings	373.5		260.7
Depreciation and amortization	90.2		84.5
Capital expenditures	88.1		98.8
Total assets	9,959.5	[1]	9,618.4	$ 9,405.8
Operating segments | Seating
Segment Reporting Information [Line Items]
Revenues from external customers	3,602.0		3,485.0
Segment earnings	291.6		196.1
Depreciation and amortization	61.3		58.3
Capital expenditures	62.4		71.5
Total assets	6,241.5		6,314.6
Operating segments | Electrical
Segment Reporting Information [Line Items]
Revenues from external customers	1,060.9		1,036.4
Segment earnings	149.8		137.0
Depreciation and amortization	26.1		24.1
Capital expenditures	20.2		25.3
Total assets	1,745.9		1,689.8
Other
Segment Reporting Information [Line Items]
Revenues from external customers	0.0		0.0
Segment earnings	(67.9)		(72.4)
Depreciation and amortization	2.8		2.1
Capital expenditures	5.5		2.0
Total assets	$ 1,972.1		$ 1,614.0
[1] Unaudited.

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Amount of pretax income or loss for the reportable segment before interest, other (income) expense, provision (benefit) for income taxes and equity in net (income) loss of affiliates.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
-Section S99
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