Segment Reporting - Schedule of Reconciliation of Consolidated Segment Earnings to Consolidated Income Before Provision for Income Taxes (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jul. 04, 2026 |
Jun. 28, 2025 |
Jul. 04, 2026 |
Jun. 28, 2025 |
|
| Segment Reporting | ||||
| Revenue | $ 6,209.4 | $ 6,030.4 | $ 12,032.2 | $ 11,590.7 |
| Cost of sales | 5,739.1 | 5,591.3 | 11,111.6 | 10,792.4 |
| Gross margin | 470.3 | 439.1 | 920.6 | 798.3 |
| Selling, general and administrative | 197.5 | 186.3 | 387.8 | 358.7 |
| Amortization of intangibles | 4.9 | 4.7 | 9.9 | 9.9 |
| Intersegment support activities | 0.0 | 0.0 | 0.0 | 0.0 |
| Segment earnings | 267.9 | 248.1 | 522.9 | 429.7 |
| Interest expense, net | 24.2 | 25.4 | 49.8 | 51.2 |
| Other expense, net | 2.8 | 5.2 | 15.5 | 25.6 |
| Consolidated income before provision for income taxes and equity in net income of affiliates | 240.9 | 217.5 | 457.6 | 352.9 |
| Seating | ||||
| Segment Reporting | ||||
| Revenue | 4,624.1 | 4,473.9 | 9,028.5 | 8,625.0 |
| E-Systems | ||||
| Segment Reporting | ||||
| Revenue | 1,585.3 | 1,556.5 | 3,003.7 | 2,965.7 |
| Operating segments | Seating | ||||
| Segment Reporting | ||||
| Revenue | 4,624.1 | 4,473.9 | 9,028.5 | 8,625.0 |
| Cost of sales | 4,232.0 | 4,092.0 | 8,256.6 | 7,937.9 |
| Gross margin | 392.8 | 384.8 | 772.9 | 691.2 |
| Selling, general and administrative | 101.6 | 95.8 | 199.5 | 181.3 |
| Amortization of intangibles | 3.1 | 2.9 | 6.2 | 6.3 |
| Intersegment support activities | 1.9 | 1.6 | 3.6 | 3.4 |
| Segment earnings | 286.2 | 284.5 | 563.6 | 500.2 |
| Operating segments | E-Systems | ||||
| Segment Reporting | ||||
| Revenue | 1,585.3 | 1,556.5 | 3,003.7 | 2,965.7 |
| Cost of sales | 1,532.2 | 1,528.6 | 2,909.0 | 2,906.0 |
| Gross margin | 124.9 | 96.6 | 238.6 | 191.8 |
| Selling, general and administrative | 35.4 | 37.2 | 71.3 | 72.7 |
| Amortization of intangibles | 1.8 | 1.8 | 3.7 | 3.6 |
| Intersegment support activities | 2.6 | 2.4 | 5.2 | 4.8 |
| Segment earnings | 85.1 | 55.2 | 158.4 | 110.7 |
| Intersegment revenues | ||||
| Segment Reporting | ||||
| Revenue | (72.5) | (71.6) | (144.9) | (136.2) |
| Intersegment revenues | Seating | ||||
| Segment Reporting | ||||
| Revenue | 0.7 | 2.9 | 1.0 | 4.1 |
| Intersegment revenues | E-Systems | ||||
| Segment Reporting | ||||
| Revenue | 71.8 | 68.7 | 143.9 | 132.1 |
| Other | ||||
| Segment Reporting | ||||
| Revenue | 0.0 | 0.0 | 0.0 | 0.0 |
| Cost of sales | (25.1) | (29.3) | (54.0) | (51.5) |
| Gross margin | (47.4) | (42.3) | (90.9) | (84.7) |
| Selling, general and administrative | 60.5 | 53.3 | 117.0 | 104.7 |
| Amortization of intangibles | 0.0 | 0.0 | 0.0 | 0.0 |
| Intersegment support activities | (4.5) | (4.0) | (8.8) | (8.2) |
| Segment earnings | $ (103.4) | $ (91.6) | $ (199.1) | $ (181.2) |
| X | ||||||||||
- Definition Intersegment Support Activities No definition available.
|
| X | ||||||||||
- Definition The sum of all other income and expenses (both operating and nonoperating) recognized by the entity in the period not otherwise specified in the income statement. No definition available.
|
| X | ||||||||||
- Definition Amount of amortization expense for finite-lived intangible asset. Excludes goodwill and capitalized cost for software to be sold, leased, or marketed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of interest expense classified as nonoperating. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- 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
|
| X | ||||||||||
- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|