Summary of Significant Accounting Policies - Narrative (Details)	3 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) reportable_operating_segment	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Jan. 01, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Accounts receivable, reserves	$ 35,300,000	$ 35,300,000	$ 36,000,000.0
Company recorded E&D costs		557,000,000.0
Capitalized pre-production E&D costs		229,700,000	211,200,000
Capitalized pre-production tooling costs related to customer-owned tools		174,000,000.0	231,600,000
Cash collected related to E&D and tooling costs		354,600,000	408,300,000
Depreciation expense		474,000,000.0	447,600,000	$ 433,000,000.0
Capital expenditures recorded in accounts payable		118,400,000	131,600,000	156,200,000
Amortization of intangible assets		65,900,000	62,300,000	51,400,000
Impairment of long-lived assets to be disposed of		21,300,000	8,700,000	4,700,000
Fixed asset impairment charges		4,600,000		1,400,000
Restructuring charges	8,100,000	$ 132,000,000.0	$ 194,200,000	88,000,000.0
Percentage of net sales		1.00%	1.00%
Contract liabilities	$ 0	$ 0
Contract liabilities recognized in revenue		0
Foreign currency transaction losses		$ 19,900,000	$ 20,600,000	14,400,000
Number of reportable operating segments | reportable_operating_segment		2
Amortization Of Intangible Assets No Longer In Use		$ 25,600,000
Cost of sales
Restructuring Cost and Reserve [Line Items]
Company recorded E&D costs		135,000,000.0	138,200,000	140,400,000
Restructuring charges		122,300,000	173,800,000	63,700,000
Selling, General and Administrative Expenses
Restructuring Cost and Reserve [Line Items]
Company recorded E&D costs		192,300,000	178,400,000	156,200,000
Restructuring charges		16,400,000	16,400,000	24,000,000.0
Corporate, Non-Segment
Restructuring Cost and Reserve [Line Items]
Company recorded E&D costs		16,500,000
Asset impairments
Restructuring Cost and Reserve [Line Items]
Restructuring charges		23,300,000	$ 9,500,000	$ 4,700,000
E-Systems
Restructuring Cost and Reserve [Line Items]
Company recorded E&D costs		$ 259,800,000
Company recorded E&D cost related to sale rate		6.00%
Seating Operating Segment
Restructuring Cost and Reserve [Line Items]
Company recorded E&D costs		$ 280,700,000
Company recorded E&D cost related to sale rate		2.00%
Disrupted Reporting Unit | Seating Operating Segment
Restructuring Cost and Reserve [Line Items]
Percentage of fair value in excess of carrying value (less than)	1.00%	1.00%
Cumulative Effect, Period of Adoption, Adjustment
Restructuring Cost and Reserve [Line Items]
Accounts receivable, reserves					$ 800,000