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Revenue and Contract Balances (Tables) | 12 Months Ended
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Sep. 28, 2025
Revenue from Contract with Customer [Abstract] |
Summary of revenue disaggregated by client sector and contract type | The following tables present revenue disaggregated by client sector and contract type (in thousands):
| Fiscal Year Ended |
| September 28, 2025 |  | September 29, 2024 |  | October 1, 2023 |
Client Sector: |  |  |  |  |  |
U.S. federal government (1) | $ | 1,718,831 |  |  | $ | 1,675,996 |  |  | $ | 1,387,101 |  |
U.S. state and local government | 789,968 |  |  | 613,185 |  |  | 607,074 |  |
U.S. commercial | 899,298 |  |  | 909,642 |  |  | 869,460 |  |
International (2) | 2,034,493 |  |  | 1,999,856 |  |  | 1,658,915 |  |
Total | $ | 5,442,590 |  |  | $ | 5,198,679 |  |  | $ | 4,522,550 |  |
Contract Type: |  |  |  |  |  |
Fixed-price | $ | 2,365,680 |  |  | $ | 2,016,638 |  |  | $ | 1,643,849 |  |
Time-and-materials | 2,319,766 |  |  | 2,337,913 |  |  | 2,166,671 |  |
Cost-plus | 757,144 |  |  | 844,128 |  |  | 712,030 |  |
Total | $ | 5,442,590 |  |  | $ | 5,198,679 |  |  | $ | 4,522,550 |  |
(1) Includes revenue generated under U.S. federal government contracts performed outside the United States. (2) Includes revenue generated from non-U.S. clients, primarily i n Australia, Canada and the United Kingdom.
Summary of net contract assets/liabilities | Net contract assets/liabilities consisted of the following (in thousands):
| Fiscal Year Ended
| September 28, 2025 |  | September 29, 2024
Contract assets (1) | $ | 138,232 |  |  | $ | 129,678 |
Contract liabilities | (420,254) |  |  | (351,738) |
Contract liabilities - non-current (2) | (2,628) |  |  | — |
Net contract liabilities | $ | (284,650) |  |  | $ | (222,060) |
(1) Inclu des $12.8 million and $7.9 million of contract retentions at fiscal 2025 and 2024 year-ends, respectively. (2) Reported under "Other non-current liabilities" on our consolidated balance sheet as of September 28, 2025.
Summary of components of net accounts receivable | Net accounts receivable consisted of the following (in thousands):
| Fiscal Year Ended
| September 28, 2025 |  | September 29, 2024
Billed | $ | 855,026 |  |  | $ | 707,406 |
Unbilled | 310,818 |  |  | 348,907 |
Total accounts receivable | 1,165,844 |  |  | 1,056,313 |
Allowance for doubtful accounts | (6,916) |  |  | (4,852) |
Total accounts receivable, net | $ | 1,158,928 |  |  | $ | 1,051,461 |
Summary of remaining performance obligation, expected timing | We expect to satisfy our RUPO as of fiscal 2025 year-end over the following periods (in thousands):
| Amount
Within 12 months | $ | 2,848,652 |
Beyond (1) | 1,252,475 |
Total | $ | 4,101,127 |
(1) The majority of this amount is expected to be recognized over the subsequent two-year period.

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 606 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 10 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479806/606-10-50-10 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
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