Revenue Recognition (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 19,810.3	$ 21,148.5	$ 20,467.0
North America
Disaggregation of Revenue [Line Items]
Revenues	7,365.5	7,660.6	7,788.1
Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	7,785.5	8,726.9	8,136.5
Asia
Disaggregation of Revenue [Line Items]
Revenues	3,968.3	4,040.0	3,794.9
South America
Disaggregation of Revenue [Line Items]
Revenues	691.0	721.0	747.5
Seating
Disaggregation of Revenue [Line Items]
Revenues	15,097.2	16,021.9	15,873.0
Seating | North America
Disaggregation of Revenue [Line Items]
Revenues	6,265.2	6,549.7	6,695.6
Seating | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	5,620.2	6,299.0	5,850.4
Seating | Asia
Disaggregation of Revenue [Line Items]
Revenues	2,710.7	2,624.6	2,761.7
Seating | South America
Disaggregation of Revenue [Line Items]
Revenues	501.1	548.6	565.3
E-Systems
Disaggregation of Revenue [Line Items]
Revenues	4,713.1	5,126.6	4,594.0
E-Systems | North America
Disaggregation of Revenue [Line Items]
Revenues	1,100.3	1,110.9	1,092.5
E-Systems | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues	2,165.3	2,427.9	2,286.1
E-Systems | Asia
Disaggregation of Revenue [Line Items]
Revenues	1,257.6	1,415.4	1,033.2
E-Systems | South America
Disaggregation of Revenue [Line Items]
Revenues	$ 189.9	$ 172.4	$ 182.2