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v3.25.0.1

Segment Information - Schedule of Total Revenues, Segment Operating Profit and Total Asset for Reporting Segment (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Dec. 27, 2024 | Dec. 29, 2023
Revenues from External Customers: |  |
Revenues | $ 2,932,956 | $ 2,810,227
Segment Operating Profit: |  |
Total Segment Operating Profit | 208,418 | 142,000
Restructuring, Transaction and Other Charges | (16,096) | (41,347)
Total Other (Expense) Income, net | (155,271) | (38,795)
Earnings from Continuing Operations Before Taxes | 53,147 | 103,205
Amortization of intangible assets | 38,661 |
Restructuring charges | 14,740 |
Amentum Holdings, Inc. | Discontinued Operations, Disposed of by Means Other than Sale, Spinoff | SpinCo Business |  |
Segment Operating Profit: |  |
Equity method investment retained after disposal, mark-to market losses | 145,200 |
CH2M HILL Companies, Ltd. |  |
Segment Operating Profit: |  |
Restructuring charges | 14,740 | 38,354
CH2M HILL Companies, Ltd. | Professional Services and Employee Seperation |  |
Segment Operating Profit: |  |
Restructuring charges | 15,000 | 37,100
Operating Segments |  |
Segment Operating Profit: |  |
Total Segment Operating Profit | 224,514 | 183,347
Corporate | Other Expense |  |
Segment Operating Profit: |  |
Amortization of intangible assets | 38,700 | 36,900
Operating profit, excluding intangible amortization and other corporate transaction related costs | 210,300 | 167,400
PA Consulting | Operating Segments |  |
Revenues from External Customers: |  |
Revenues | 306,748 | 306,001
Segment Operating Profit: |  |
Total Segment Operating Profit | 66,738 | 54,455
PA Consulting | Operating Segments | CH2M HILL Companies, Ltd. |  |
Segment Operating Profit: |  |
Restructuring charges | (236) | 1,175
Infrastructure & Advanced Facilities | Operating Segments |  |
Revenues from External Customers: |  |
Revenues | 2,626,208 | 2,504,226
Segment Operating Profit: |  |
Total Segment Operating Profit | $ 157,776 | $ 128,892

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