Quarterly Financial Data (unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Quarterly Financial Data

	Thirteen Weeks Ended
	March 31, 2018		June 30, 2018		September 29, 2018		December 31, 2018
Net sales	$	5,733.7	$	5,580.8	$	4,891.6	$	4,942.4
Gross profit	631.4		638.1		526.3		522.5
Consolidated net income	374.2		355.0		274.7		242.8
Net income attributable to Lear	353.7		331.4		252.5		212.2
Basic net income per share attributable to Lear	5.19		4.86		3.83		3.42
Diluted net income per share attributable to Lear	5.16		4.83		3.80		3.39

(In millions, except per share data)

	Thirteen Weeks Ended
	March 30, 2019		June 29, 2019		September 28, 2019		December 31, 2019
Net sales	$	5,160.1	$	5,007.6	$	4,825.0	$	4,817.6
Gross profit	473.2		478.2		459.3		326.8
Consolidated net income	246.1		202.0		238.6		144.0
Net income attributable to Lear	228.9		182.8		215.9		126.0
Basic net income per share attributable to Lear	3.75		2.92		3.59		2.51
Diluted net income per share attributable to Lear	3.73		2.92		3.58		2.50