Revenue Recognition - Summary of Revenue by Reportable Operating Segment and Geography (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jul. 04, 2020	Jul. 03, 2021	Jul. 04, 2020
Disaggregation of Revenue [Line Items]
Revenues from external customers	$ 4,760.7	$ 2,444.5	$ 10,115.1	$ 6,902.2
North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,857.0	739.9	3,868.2	2,621.1
Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,727.0	823.6	3,804.0	2,576.2
Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	997.2	840.9	2,082.7	1,517.2
South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	179.5	40.1	360.2	187.7
Seating
Disaggregation of Revenue [Line Items]
Revenues from external customers	3,608.2	1,754.9	7,604.2	5,121.5
Seating | North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,572.7	614.8	3,241.3	2,188.5
Seating | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,226.0	550.1	2,700.7	1,786.1
Seating | Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	664.7	557.9	1,381.4	1,015.3
Seating | South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	144.8	32.1	280.8	131.6
E-Systems
Disaggregation of Revenue [Line Items]
Revenues from external customers	1,152.5	689.6	2,510.9	1,780.7
E-Systems | North America
Disaggregation of Revenue [Line Items]
Revenues from external customers	284.3	125.1	626.9	432.6
E-Systems | Europe and Africa
Disaggregation of Revenue [Line Items]
Revenues from external customers	501.0	273.5	1,103.3	790.1
E-Systems | Asia
Disaggregation of Revenue [Line Items]
Revenues from external customers	332.5	283.0	701.3	501.9
E-Systems | South America
Disaggregation of Revenue [Line Items]
Revenues from external customers	$ 34.7	$ 8.0	$ 79.4	$ 56.1