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Goodwill - Schedule of Changes in Carrying Amount of Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 27, 2025 USD ($)
Goodwill
Balance at January 1, 2025	$ 1,699.2
Foreign currency translation and other	62.6
Balance at September 27, 2025	1,761.8	[1]
Seating
Goodwill
Balance at January 1, 2025	1,305.9
Foreign currency translation and other	55.5
Balance at September 27, 2025	1,361.4
E-Systems
Goodwill
Balance at January 1, 2025	393.3
Foreign currency translation and other	7.1
Balance at September 27, 2025	$ 400.4
[1] Unaudited

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