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Basis of Presentation	12 Months Ended
Basis of Presentation	Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation Lear Corporation ("Lear," and together with its consolidated subsidiaries, the "Company") and its affiliates design and manufacture automotive seating and electrical distribution systems and related components. The Company’s main customers are automotive original equipment manufacturers. The Company operates facilities worldwide. The accompanying consolidated financial statements include the accounts of Lear, a Delaware corporation, and the wholly owned and less than wholly owned subsidiaries controlled by Lear.