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Valuation And Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
Contract Reserves      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year $ 46,547 $ 58,857 $ 72,412
Additions charged to expenses and other accounts 94,829 23,607 41,572
Deductions 96,046 35,099 55,377
Foreign exchange impact and other (73) (818) 250
Balance at end of year 45,257 46,547 58,857
Allowance for Credit Losses      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 4,608 4,351 6,313
Additions charged to expenses and other accounts 1,786 1,686 2,245
Deductions 2,200 1,083 4,238
Foreign exchange impact and other (184) (346) 31
Balance at end of year 4,010 4,608 4,351
Reserve for Inventory Valuation      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 140,605 155,655 153,311
Additions charged to expenses and other accounts 20,286 25,252 26,513
Deductions 21,336 33,876 25,151
Foreign exchange impact and other 2,244 (6,426) 982
Balance at end of year 141,799 140,605 155,655
Deferred Tax Valuation Allowance      
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]      
Balance at beginning of year 8,650 13,896 14,784
Additions charged to expenses and other accounts 2,454 0 2,513
Deductions 4,254 4,598 3,729
Foreign exchange impact and other (420) (648) 328
Balance at end of year $ 6,430 $ 8,650 $ 13,896