Goodwill - Summary of Changes in Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Oct. 02, 2021 USD ($)
Goodwill [Roll Forward]
Balance at January 1, 2021	$ 1,655.8
Foreign currency translation and other	4.6
Balance at October 2, 2021	1,660.4	[1]
Seating
Goodwill [Roll Forward]
Balance at January 1, 2021	1,268.8
Foreign currency translation and other	(15.4)
Balance at October 2, 2021	1,253.4
E-Systems
Goodwill [Roll Forward]
Balance at January 1, 2021	387.0
Foreign currency translation and other	20.0
Balance at October 2, 2021	$ 407.0

[1] Unaudited.