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Goodwill - Summary of Changes in Carrying Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Apr. 03, 2021 USD ($)
Goodwill [Roll Forward]
Balance at January 1, 2021	$ 1,655.8
Foreign currency translation and other	1.9
Balance at April 3, 2021	1,657.7	[1]
Seating
Goodwill [Roll Forward]
Balance at January 1, 2021	1,268.8
Foreign currency translation and other	(15.2)
Balance at April 3, 2021	1,253.6
E-Systems
Goodwill [Roll Forward]
Balance at January 1, 2021	387.0
Foreign currency translation and other	17.1
Balance at April 3, 2021	$ 404.1
[1] Unaudited.

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

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X

- Definition

Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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