Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Net sales	$ 20,891.5	$ 19,263.1	$ 17,045.5
Cost of sales	19,481.6	17,871.2	15,936.6
Selling, general and administrative expenses	684.8	643.2	588.9
Amortization of intangible assets	70.8	73.3	65.9
Interest expense	98.6	91.8	99.6
Other expense, net	46.4	0.1	55.2
Consolidated income before provision for income taxes and equity in net income of affiliates	509.3	583.5	299.3
Provision for income taxes	133.7	137.7	93.9
Equity in net income of affiliates	(33.1)	(15.8)	(28.5)
Consolidated net income	408.7	461.6	233.9
Less: Net income attributable to noncontrolling interests	81.0	87.7	75.4
Net income attributable to Lear	$ 327.7	$ 373.9	$ 158.5
Basic net income per share attributable to Lear (in dollars per share)	$ 5.49	$ 6.22	$ 2.63
Diluted net income per share attributable to Lear (in dollars per share)	$ 5.47	$ 6.19	$ 2.62
Average common shares outstanding (in shares)	59,674,488	60,082,833	60,254,380
Average diluted shares outstanding (in shares)	59,920,529	60,420,484	60,429,962