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Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Revenues	$ 17,045.5	$ 19,810.3	$ 21,148.5
North America
Disaggregation of Revenue [Line Items]
Revenues	6,630.5	7,365.5	7,660.6
Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	6,240.3	7,785.5	8,726.9
Asia
Disaggregation of Revenue [Line Items]
Revenues	3,655.3	3,968.3	4,040.0
South America
Disaggregation of Revenue [Line Items]
Revenues	519.4	691.0	721.0
Seating
Disaggregation of Revenue [Line Items]
Revenues	12,712.7	15,097.2	16,021.9
Seating | North America
Disaggregation of Revenue [Line Items]
Revenues	5,545.7	6,265.2	6,549.7
Seating | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	4,371.4	5,620.2	6,299.0
Seating | Asia
Disaggregation of Revenue [Line Items]
Revenues	2,418.7	2,710.7	2,624.6
Seating | South America
Disaggregation of Revenue [Line Items]
Revenues	376.9	501.1	548.6
E-Systems
Disaggregation of Revenue [Line Items]
Revenues	4,332.8	4,713.1	5,126.6
E-Systems | North America
Disaggregation of Revenue [Line Items]
Revenues	1,084.8	1,100.3	1,110.9
E-Systems | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	1,868.9	2,165.3	2,427.9
E-Systems | Asia
Disaggregation of Revenue [Line Items]
Revenues	1,236.6	1,257.6	1,415.4
E-Systems | South America
Disaggregation of Revenue [Line Items]
Revenues	$ 142.5	$ 189.9	$ 172.4

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