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Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Disaggregation of Revenue [Line Items]
Revenues	$ 21,148.5	$ 20,467.0	$ 18,557.6
North America
Disaggregation of Revenue [Line Items]
Revenues	7,660.6	7,788.1	7,523.6
Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	8,726.9	8,136.5	7,051.8
Asia
Disaggregation of Revenue [Line Items]
Revenues	4,040.0	3,794.9	3,444.6
South America
Disaggregation of Revenue [Line Items]
Revenues	721.0	747.5	537.6
Seating
Disaggregation of Revenue [Line Items]
Revenues	16,021.9	15,873.0	14,356.7
Seating | North America
Disaggregation of Revenue [Line Items]
Revenues	6,549.7	6,695.6	6,485.9
Seating | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	6,299.0	5,850.4	4,972.9
Seating | Asia
Disaggregation of Revenue [Line Items]
Revenues	2,624.6	2,761.7	2,503.4
Seating | South America
Disaggregation of Revenue [Line Items]
Revenues	548.6	565.3	394.5
E-Systems
Disaggregation of Revenue [Line Items]
Revenues	5,126.6	4,594.0	4,200.9
E-Systems | North America
Disaggregation of Revenue [Line Items]
Revenues	1,110.9	1,092.5	1,037.7
E-Systems | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	2,427.9	2,286.1	2,078.9
E-Systems | Asia
Disaggregation of Revenue [Line Items]
Revenues	1,415.4	1,033.2	941.2
E-Systems | South America
Disaggregation of Revenue [Line Items]
Revenues	$ 172.4	$ 182.2	$ 143.1

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+ 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
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130543-203045

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
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-URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130539-203045

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-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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