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Acquisitions (Narrative) (Details) $ in Thousands, € in Millions, R$ in Billions |  |  | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 31, 2024 USD ($) | Jan. 31, 2024 EUR (€) | Mar. 31, 2023 USD ($) facilities | Mar. 31, 2023 BRL (R$) | Jun. 28, 2025 USD ($) | Sep. 28, 2024 USD ($) | Jun. 29, 2024 USD ($) | Dec. 30, 2023 USD ($) | Jun. 28, 2025 USD ($) | Jun. 29, 2024 USD ($) | May 12, 2025 | Dec. 28, 2024 USD ($)
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Goodwill |  |  |  |  | $ 2,477,737 |  |  |  | $ 2,477,737 |  |  | $ 2,322,593
Acquisition and integration costs |  |  |  |  | $ 3,383 |  | $ 1,130 |  | $ 4,917 | $ 5,184 |  |
Nextida |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, parent |  |  |  |  |  |  |  |  |  |  | 85.00% |
Nextida | Tessenderlo Group NV |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage, noncontrolling owner |  |  |  |  |  |  |  |  |  |  | 15.00% |
Senior Secured Facilities | Term A-3 Facility |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit outstanding |  |  | $ 300,000 |  |  |  |  |  |  |  |  |
Senior Secured Facilities | Term A-4 Facility |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Line of credit outstanding |  |  | 500,000 |  |  |  |  |  |  |  |  |
Miropasz |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses, gross | $ 114,300 | € 105.6 |  |  |  |  |  |  |  |  |  |
Foreign currency exchange rate | 1.082198 |  |  |  |  |  |  |  |  |  |  |
Less hold-back | $ 7,600 | € 7.0 |  |  |  |  |  |  |  |  |  |
Purchase price and other immaterial adjustments |  |  |  |  |  | $ 200 |  |  |  |  |  |
Property, plant and equipment | 21,200 |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets | $ 34,900 |  |  |  |  |  |  |  |  |  |  |
Weighted average useful life | 17 years | 17 years |  |  |  |  |  |  |  |  |  |
Other net assets | $ 2,800 |  |  |  |  |  |  |  |  |  |  |
Goodwill | $ 62,800 |  |  |  |  |  |  |  |  |  |  |
Gelnex |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Payments to acquire businesses, gross |  |  | $ 1,100,000 |  |  |  |  |  |  |  |  |
Foreign currency exchange rate |  |  | 5.08 |  |  |  |  |  |  |  |  |
Less hold-back |  |  | $ 104,145 |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | $ 169,205 |  |  |  |  |  |  |  |  |
Weighted average useful life |  |  | 11 years 3 months 18 days | 11 years 3 months 18 days |  |  |  |  |  |  |  |
Goodwill |  |  | $ 542,572 |  |  |  |  |  |  |  |  |
Expected price of acquisition |  |  | 1,200,000 |  |  |  |  |  |  |  |  |
Business combination, consideration transferred |  |  | 853,300 | R$ 4.3 |  |  |  |  |  |  |  |
Partial payment |  |  | 243,500 |  |  |  |  |  |  |  |  |
Purchase price adjustments |  |  |  |  |  |  |  | $ 14,100 |  |  |  |
Increase in property, plant and equipment |  |  |  |  |  |  | 13,700 |  |  |  |  |
Intangible assets adjustment |  |  |  |  |  |  | 9,500 |  |  |  |  |
Measurement period adjustments |  |  |  |  |  |  | 9,100 |  |  |  |  |
Increase in deferred tax liabilities |  |  |  |  |  |  | 5,100 |  |  |  |  |
Deferred tax asset |  |  | 9,067 |  |  |  | 8,100 |  |  | $ 8,100 |  |
Increase in other assets and liabilities |  |  |  |  |  |  | $ 100 |  |  |  |  |
Expected tax deductible amount of goodwill |  |  | 425,000 |  |  |  |  |  |  |  |  |
Gelnex | Customer Relationships |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets |  |  | $ 331,000 |  |  |  |  |  |  |  |  |
Weighted average useful life |  |  | 11 years 4 months 24 days | 11 years 4 months 24 days |  |  |  |  |  |  |  |
Gelnex | Trade Names |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Finite-lived intangible assets |  |  | $ 8,500 |  |  |  |  |  |  |  |  |
Weighted average useful life |  |  | 5 years | 5 years |  |  |  |  |  |  |  |
Gelnex | South America |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of facilities acquired | facilities |  |  | 5 |  |  |  |  |  |  |  |  |
Gelnex | UNITED STATES |  |  |  |  |  |  |  |  |  |  |  |
Business Combination [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of facilities acquired | facilities |  |  | 1 |  |  |  |  |  |  |  |  |

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