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Valuation And Qualifying Accounts (Details) - USD ($) $ in Thousands | 12 Months Ended
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Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Contract Reserves |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | $ 81,180 | $ 62,975 | $ 66,288
Additions charged to expenses and other accounts | 65,755 | 133,180 | 80,180
Deductions | 62,146 | 114,880 | 83,421
Foreign exchange impact and other | (429) | (95) | (72)
Balance at end of year | 84,360 | 81,180 | 62,975
Allowance for Credit Losses |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 3,073 | 4,010 | 4,608
Additions charged to expenses and other accounts | 808 | 1,117 | 1,786
Deductions | 1,316 | 2,145 | 2,200
Foreign exchange impact and other | 38 | 91 | (184)
Balance at end of year | 2,603 | 3,073 | 4,010
Reserve for Inventory Valuation |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 149,114 | 141,799 | 140,605
Additions charged to expenses and other accounts | 27,734 | 21,576 | 20,286
Deductions | 31,218 | 16,903 | 21,336
Foreign exchange impact and other | 501 | 2,642 | 2,244
Balance at end of year | 146,131 | 149,114 | 141,799
Deferred Tax Valuation Allowance |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at beginning of year | 10,905 | 6,430 | 8,650
Additions charged to expenses and other accounts | 2,571 | 4,693 | 2,454
Deductions | 1,159 | 218 | 4,254
Foreign exchange impact and other | 0 | 0 | (420)
Balance at end of year | $ 12,317 | $ 10,905 | $ 6,430

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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480738/235-10-S50-5 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480678/235-10-S99-4 + Details
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