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Segment Information (Operating Profit By Segment And Reconciliation Of Segment Operating Profit To Earnings Before Income Taxes) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jun. 27, 2020 | Jun. 29, 2019 | Jun. 27, 2020 | Jun. 29, 2019
Segment Reporting Information |  |  |  |
Operating profit (loss) | $ (1,860) | $ 84,112 | $ 172,941 | $ 241,343
Deductions from operating profit: |  |  |  |
Interest expense | 9,440 | 9,780 | 29,923 | 29,401
Equity-based compensation expense | 1,390 | 1,439 | 4,661 | 5,130
Non-service pension expense | 4,241 | 4,883 | 11,440 | 14,666
Corporate and other expenses, net | 6,423 | 7,992 | 21,836 | 21,729
Earnings (loss) before income taxes | (23,354) | 60,018 | 105,081 | 170,417
Aircraft Controls |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit (loss) | (42,053) | 34,484 | 31,240 | 94,805
Space And Defense Controls |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit (loss) | 22,290 | 24,133 | 72,224 | 63,110
Industrial Systems |  |  |  |
Segment Reporting Information |  |  |  |
Operating profit (loss) | $ 17,903 | $ 25,495 | $ 69,477 | $ 83,428

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