Cover - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 06, 2023	Jul. 02, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	1-11311
Entity Registrant Name	LEAR CORP
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	13-3386776
Entity Address, Address Line One	21557 Telegraph Road
Entity Address, City or Town	Southfield
Entity Address, State or Province	MI
Entity Address, Postal Zip Code	48033
City Area Code	248
Local Phone Number	447-1500
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	LEA
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 7,507,492,498
Entity Common Stock, Shares Outstanding		59,130,153
Documents Incorporated by Reference	Certain sections of the registrant's Notice of Annual Meeting of Stockholders and Definitive Proxy Statement on Schedule 14A for its Annual Meeting of Stockholders to be held in May 2023, as described in the Cross Reference Sheet and Table of Contents included herewith, are incorporated by reference into Part III of this Report.
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY
Entity Central Index Key	0000842162