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Revenue Recognition - Summary of Revenue by Reportable Operating Segment and Geography (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jun. 29, 2019	Jun. 30, 2018
Disaggregation of Revenue [Line Items]
Revenues from external customers	$ 5,007.6	$ 5,580.8	$ 10,167.7	$ 11,314.5
North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,872.4	1,983.8	3,748.5	4,038.9
Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,999.4	2,378.5	4,170.8	4,821.7
Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	965.8	1,019.5	1,921.5	2,063.6
South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	170.0	199.0	326.9	390.3
Seating
Disaggregation of Revenue [Line Items]
Revenues from external customers	3,839.4	4,274.7	7,753.1	8,604.6
Seating | North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,597.9	1,711.1	3,189.0	3,451.2
Seating | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,461.5	1,738.1	3,015.8	3,490.3
Seating | Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	659.2	668.4	1,310.6	1,354.5
Seating | South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	120.8	157.1	237.7	308.6
E-Systems
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,168.2	1,306.1	2,414.6	2,709.9
E-Systems | North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	274.5	272.7	559.5	587.7
E-Systems | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	537.9	640.4	1,155.0	1,331.4
E-Systems | Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	306.6	351.1	610.9	709.1
E-Systems | South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	$ 49.2	$ 41.9	$ 89.2	$ 81.7

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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