Debt - Components (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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| Debt | ||||||
| Unamortized debt issuance costs | $ (1.9) | $ (2.4) | ||||
| Total notes and loans outstanding | 1,806.7 | 1,850.1 | ||||
| Total debt | 1,824.8 | 1,869.1 | ||||
| Current portion of long-term debt and finance lease obligations | (10.1) | (16.6) | ||||
| Total long-term debt, less current portion | 1,814.7 | 1,852.5 | ||||
| CHF loan due March 2029 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | 0.0 | 180.8 | ||||
| CHF loan due March 2031 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [1] | 185.2 | 189.0 | |||
| CHF loan due April 15, 2034 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [2] | 61.9 | 63.0 | |||
| CHF loan due April 15, 2036 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [2] | 242.6 | 247.0 | |||
| CHF loan due April 15, 2039 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [2] | 228.9 | 233.1 | |||
| CHF loan due December 8, 2031 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [2] | 371.2 | 378.1 | |||
| CHF loan due December 11, 2029 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [2] | 367.5 | 374.3 | |||
| EUR loan due December 8, 2031 | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | [2] | 171.3 | 176.0 | |||
| 2024 Revolving Credit Agreement | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | 170.0 | 0.0 | ||||
| Other loans | ||||||
| Debt | ||||||
| Debt, before unamortized debt issuance costs | 10.0 | 11.2 | ||||
| Finance lease obligations | ||||||
| Debt | ||||||
| Total debt | $ 18.1 | $ 19.0 | ||||
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| X | ||||||||||
- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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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- Definition Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of long-term debt and lease obligation, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt classified as noncurrent. Excludes lease obligation. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Carrying value as of the balance sheet date of all notes and loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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