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Segment Reporting - Narrative (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018 USD ($)	Sep. 30, 2017 USD ($)	Sep. 29, 2018 USD ($) reportable_operating_segment	Sep. 30, 2017 USD ($)
Segment Reporting Information [Line Items]
Reportable operating segments | reportable_operating_segment			2
Restructuring charges			$ 48.2
Operating segments | Seating
Segment Reporting Information [Line Items]
Restructuring charges	$ 17.3	$ 13.3	37.6	$ 29.6
Operating segments | E-Systems
Segment Reporting Information [Line Items]
Restructuring charges	2.4	2.7	7.9	6.3
Other
Segment Reporting Information [Line Items]
Restructuring charges	$ 0.1	$ 1.0	$ 2.7	$ 12.7

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- Definition

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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.

+ References

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
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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