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Segment Reporting - Summary of Segment Financial Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Revenues from external customers $ 19,263.1 $ 17,045.5 $ 19,810.3
Segment earnings 675.4 454.1 1,070.2
Depreciation and amortization 573.9 539.9 509.9
Capital expenditures 585.1 452.3 603.9
Total assets 13,352.4 13,198.6  
Operating Segments      
Segment Reporting Information [Line Items]      
Segment earnings 972.5 688.6 1,327.5
Operating Segments | Seating      
Segment Reporting Information [Line Items]      
Revenues from external customers 14,411.4 12,712.7 15,097.2
Segment earnings 851.3 590.5 961.2
Depreciation and amortization 362.6 348.1 331.0
Capital expenditures 340.7 257.2 370.4
Total assets 7,414.0 7,596.1  
Operating Segments | E-Systems      
Segment Reporting Information [Line Items]      
Revenues from external customers 4,851.7 4,332.8 4,713.1
Segment earnings 121.2 98.1 366.3
Depreciation and amortization 195.7 176.6 163.0
Capital expenditures 217.2 179.3 213.9
Total assets 3,584.8 3,403.3  
Other      
Segment Reporting Information [Line Items]      
Revenues from external customers 0.0 0.0 0.0
Segment earnings (297.1) (234.5) (257.3)
Depreciation and amortization 15.6 15.2 15.9
Capital expenditures 27.2 15.8 $ 19.6
Total assets $ 2,353.6 $ 2,199.2