Segment Reporting - Schedule of Segment Financial Information (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
Jul. 04, 2026 |
Jun. 28, 2025 |
Jul. 04, 2026 |
Jun. 28, 2025 |
Dec. 31, 2025 |
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| Segment Reporting | |||||||||
| Depreciation | $ 145.7 | $ 143.5 | $ 290.6 | $ 286.0 | |||||
| Capital expenditures | 172.7 | 125.4 | 297.3 | 229.4 | |||||
| Inventories | 1,723.9 | [1] | 1,684.0 | 1,723.9 | [1] | 1,684.0 | $ 1,693.2 | ||
| Total assets | 15,650.5 | [1] | 15,322.1 | 15,650.5 | [1] | 15,322.1 | $ 14,843.1 | ||
| Operating segments | Seating | |||||||||
| Segment Reporting | |||||||||
| Depreciation | 97.0 | 92.3 | 193.4 | 183.1 | |||||
| Capital expenditures | 115.2 | 86.4 | 196.2 | 156.8 | |||||
| Inventories | 884.6 | 866.8 | 884.6 | 866.8 | |||||
| Total assets | 9,292.6 | 9,049.8 | 9,292.6 | 9,049.8 | |||||
| Operating segments | E-Systems | |||||||||
| Segment Reporting | |||||||||
| Depreciation | 44.4 | 45.7 | 88.1 | 92.1 | |||||
| Capital expenditures | 54.3 | 35.3 | 93.5 | 64.0 | |||||
| Inventories | 839.3 | 817.2 | 839.3 | 817.2 | |||||
| Total assets | 4,126.2 | 4,225.9 | 4,126.2 | 4,225.9 | |||||
| Other | |||||||||
| Segment Reporting | |||||||||
| Depreciation | 4.3 | 5.5 | 9.1 | 10.8 | |||||
| Capital expenditures | 3.2 | 3.7 | 7.6 | 8.6 | |||||
| Inventories | 0.0 | 0.0 | 0.0 | 0.0 | |||||
| Total assets | $ 2,231.7 | $ 2,046.4 | $ 2,231.7 | $ 2,046.4 | |||||
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- Definition Amount of asset recognized for present right to economic benefit. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of expenditure for addition to long-lived asset included in determination of segment asset by chief operating decision maker (CODM) or otherwise regularly provided to CODM. Long-lived asset excludes financial instrument, long-term customer relationship of financial institution, mortgage and other servicing rights, deferred policy acquisition cost, and deferred tax asset. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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