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Segments (Operating Profit By Segment and Reconciliation to Consolidated Amounts) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jun. 28, 2025 | Mar. 29, 2025 | Dec. 28, 2024 | Jun. 29, 2024 | Mar. 30, 2024 | Dec. 30, 2023 | Mar. 29, 2025 | Mar. 30, 2024 | Jun. 28, 2025 | Jun. 29, 2024 | Sep. 27, 2025 | Sep. 28, 2024 | Sep. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  |  | $ 449,606 | $ 404,465 | $ 344,038
Interest Expense | $ 17,790 | $ 19,548 | $ 16,248 | $ 17,029 | $ 16,757 | $ 15,147 | $ 35,796 | $ 31,904 | $ 53,586 | $ 48,933 | 72,075 | 66,330 | 59,838
Equity-based compensation expense |  |  | 4,325 |  |  | 4,165 | 8,020 | 7,212 | 12,669 | 11,301 | 16,708 | 14,959 | 10,582
Pension settlement |  |  |  |  |  |  |  |  |  |  | 0 | 0 | 12,542
Non-service pension expense (income) |  |  |  |  |  |  |  |  |  |  | 7,719 | 12,685 | 12,324
Corporate expenses and other |  |  |  |  |  |  |  |  |  |  | 40,456 | 40,745 | 27,232
Earnings before income taxes | 76,353 | 72,058 | 74,435 | 74,513 | 71,567 | 68,900 | 146,493 | 140,467 | 222,846 | 214,980 | 312,648 | 269,746 | 221,520
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 103,728 | 96,027 | 89,304
Assets | $ 4,384,020 | $ 4,307,055 | $ 4,181,848 | $ 4,080,387 | $ 4,041,682 | $ 3,980,265 | $ 4,307,055 | $ 4,041,682 | $ 4,384,020 | $ 4,080,387 | 4,426,055 | 4,077,647 | 3,768,347
Capital expenditures |  |  |  |  |  |  |  |  |  |  | $ 144,731 | 151,995 | 177,309
Non-service pension expense |  |  |  |  |  |  |  |  |  |  | Other Nonoperating Income (Expense) |  |
Space And Defense |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  |  | $ 131,137 | 126,885 | 96,107
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 24,937 | 21,895 | 20,067
Assets |  |  |  |  |  |  |  |  |  |  | 1,213,618 | 1,035,716 | 1,011,724
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 59,162 | 47,170 | 66,613
Military Aircraft |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  |  | 98,757 | 85,503 | 60,625
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 34,424 | 31,327 | 30,449
Assets |  |  |  |  |  |  |  |  |  |  | 1,041,046 | 961,056 | 866,590
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 37,422 | 52,741 | 47,699
Commercial Aircraft |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  |  | 111,793 | 98,877 | 86,037
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 18,780 | 16,116 | 12,678
Assets |  |  |  |  |  |  |  |  |  |  | 1,052,419 | 953,053 | 779,949
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 23,283 | 28,750 | 31,887
Industrial |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Operating Income |  |  |  |  |  |  |  |  |  |  | 107,919 | 93,200 | 101,269
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 25,420 | 26,482 | 25,897
Assets |  |  |  |  |  |  |  |  |  |  | 1,102,533 | 1,098,953 | 1,086,818
Capital expenditures |  |  |  |  |  |  |  |  |  |  | 24,787 | 23,290 | 30,949
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  | 167 | 207 | 213
Assets |  |  |  |  |  |  |  |  |  |  | 16,439 | 28,869 | 23,266
Capital expenditures |  |  |  |  |  |  |  |  |  |  | $ 77 | $ 44 | $ 161

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