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Revenue Recognition - Summary of Revenue by Reportable Operating Segment and Geography (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2018	Sep. 30, 2017	Sep. 29, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues from external customers	$ 4,891.6	$ 4,981.5	$ 16,206.1	$ 15,103.2
North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,780.3	1,821.3	5,819.2	5,833.2
Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,944.8	2,024.4	6,766.5	5,973.4
Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	989.4	939.0	3,053.0	2,738.2
South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	177.1	196.8	567.4	558.4
Seating
Disaggregation of Revenue [Line Items]
Revenues from external customers	3,683.0	3,868.9	12,287.6	11,762.0
Seating | North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,524.0	1,559.8	4,975.2	5,006.0
Seating | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,392.5	1,472.7	4,882.8	4,286.4
Seating | Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	638.6	686.8	1,993.1	2,045.1
Seating | South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	127.9	149.6	436.5	424.5
E-Systems
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,208.6	1,112.6	3,918.5	3,341.2
E-Systems | North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	256.3	261.5	844.0	827.2
E-Systems | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	552.3	551.7	1,883.7	1,687.0
E-Systems | Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	350.8	252.2	1,059.9	693.1
E-Systems | South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	$ 49.2	$ 47.2	$ 130.9	$ 133.9

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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://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130545-203045

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