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Goodwill and Intangibles (Tables) | 12 Months Ended
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Sep. 26, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Carrying Value of Goodwill by Reportable Segment Appearing in Accompanying Consolidated Balance Sheets | The carrying value of goodwill associated with continuing operations and appearing in the accompanying Consolidated Balance Sheets September 26, 2025 and September 27, 2024 was as follows (in thousands):
|  |  |  | Infrastructure & Advanced Facilities |  |  |  |  | PA Consulting |  |  | Total
Balance September 27, 2024 |  |  |  | $ | 3,362,760 |  |  |  |  |  | $ | 1,425,421 |  |  |  | $ | 4,788,181 |
Foreign currency translation and other |  |  |  | (11,270) |  |  |  |  |  | 3,907 |  |  |  | (7,363) |
Balance September 26, 2025 |  |  |  | $ | 3,351,490 |  |  |  |  |  | $ | 1,429,328 |  |  |  | $ | 4,780,818 |
Schedule of Acquired Intangibles in Accompanying Consolidated Balance Sheets | The following table provides certain information related to the Company’s acquired intangibles in the accompanying Consolidated Balance Sheets for the year ended September 26, 2025 (in thousands):
| Customer Relationships, Contracts and Backlog |  | Developed Technology |  | Trade Names |  |  |  | Total |  |  |
Balances, September 27, 2024 | $ | 651,894 |  |  | $ | 31,515 |  |  | $ | 191,485 |  |  |  |  | $ | 874,894 |  |  |  |
Amortization | (128,811) |  |  | (11,985) |  |  | (14,721) |  |  |  |  | (155,517) |  |  |  |
Foreign currency translation and other | (1,808) |  |  | (6) |  |  | 107 |  |  |  |  | (1,707) |  |  |  |
Balances, September 26, 2025 | $ | 521,275 |  |  | $ | 19,524 |  |  | $ | 176,871 |  |  |  |  | $ | 717,670 |  |  |  |
Weighted Average Amortization Period (years) | 6 |  | 4 |  | 15 |  |  |  | 8 |  |  |
Schedule of Estimated Amortization Expense of Intangible Assets | The following table presents estimated amortization expense of intangible assets for fiscal 2026 and for the succeeding years.
Fiscal Year |  | (in millions)
2026 |  | $ | 139.0 |
2027 |  | 109.0 |
2028 |  | 98.6 |
2029 |  | 98.6 |
2030 |  | 76.3 |
Thereafter |  | 196.2 |
Total |  | $ | 717.7 |

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