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Receivables (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Accounts, Notes, Loans and Financing Receivable |  |  |
Maximum Amount of Receivables That May Be Sold to Purchasers | $ 125,000 |  |
Total Receivables Sold Under RPA | 680,709 |  |
Total Cash Collections Under RPA | 680,709 |  |
Gain Loss on Sale of Receivables | 0 |  |
Amount of Receivables Sold to Purchasers | 125,000 |  |
Program 1 |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Refundable Tax Credit Maximum | 8,500 |  |
Program 2 |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Refundable Tax Credit Maximum | $ 16,400 |  |
Cares Act Receivable |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Refundable Tax Credit Claimable As Percentage of Qualified Wages | 70.00% |  |
Accounts Receivable |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Government assistance receivables | $ 5,643 | $ 16,673 |
Accounts Receivable | Cares Act Receivable |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Contra Expense Recorded as Government Assistance Receivable | $ 3,320 |  |
Accounts Receivable | Excelsior Jobs Program Receivable |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Contra Expense Income Statement Location of Government Assistance Receivable | Receivables, net, Cost of Product and Service Sold | Receivables, net, Cost of Product and Service Sold | Receivables, net, Cost of Product and Service Sold
Future Tax Credits | $ 15,289 |  |
Accounts Receivable | Excelsior Jobs Program Receivable | Program 1 |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Contra Expense Recorded as Government Assistance Receivable | 1,956 | $ 1,118 | $ 1,118
Government assistance receivables | 3,074 | 2,236 |
Accounts Receivable | Excelsior Jobs Program Receivable | Program 2 |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Contra Expense Recorded as Government Assistance Receivable | 2,509 |  |
Government assistance receivables | 2,509 |  |
Accounts Receivable | Cost of sales | Cares Act Receivable |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Contra Expense Recorded as Government Assistance Receivable | $ 3,084 | $ 13,247 |
Contra Expense Income Statement Location of Government Assistance Receivable | Receivables, net, Cost of Product and Service Sold | Receivables, net, Cost of Product and Service Sold |
Accounts Receivable | Selling, General and Administrative Expenses | Cares Act Receivable |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Contra Expense Recorded as Government Assistance Receivable | $ 236 | $ 1,012 |
Contra Expense Income Statement Location of Government Assistance Receivable | Receivables, net, Selling, General and Administrative Expense | Receivables, net, Selling, General and Administrative Expense |
Asset Pledged as Collateral |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Receivables, net | $ 668,021 |  |
United States |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Amounts billed for over-time contract receivable to US Government | 1,668 | $ 3,952 |
Boeing |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Receivables from customers | 263,140 | 242,096 |
Lockheed Martin |  |  |
Accounts, Notes, Loans and Financing Receivable |  |  |
Receivables from customers | $ 138,246 | $ 122,816 |

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