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Segment Reporting - Additional Information (Detail) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018 USD ($)	Jul. 01, 2017 USD ($)	Jun. 30, 2018 USD ($) reportable_operating_segment	Jul. 01, 2017 USD ($)
Segment Reporting Information [Line Items]
Reportable operating segments | reportable_operating_segment			2
Restructuring charges			$ 28.4
Operating segments | Seating
Segment Reporting Information [Line Items]
Restructuring charges	$ 5.9	$ 9.6	20.3	$ 16.3
Operating segments | E-Systems
Segment Reporting Information [Line Items]
Restructuring charges	3.6	1.9	5.5	3.6
Other
Segment Reporting Information [Line Items]
Restructuring charges	$ 0.5	$ 11.6	$ 2.6	$ 11.7

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 420
-SubTopic 10
-Section S99
-Paragraph 1
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-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
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