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Basis Of Presentation Basis of Presentation (Impact from adoption of ASU 2017-07 on Operating Profit by Segment) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Mar. 30, 2019
Mar. 31, 2018
Mar. 30, 2019
Mar. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit $ 77,854 $ 45,407 $ 157,231 $ 112,834
Deductions from operating profit:        
Non-service pension expense 3,187 1,707 6,380 3,400
Corporate and other expenses, net 7,427 7,443 13,737 14,696
Previously Reported        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   44,271   110,574
Deductions from operating profit:        
Non-service pension expense   0   0
Corporate and other expenses, net   8,014   15,836
ASC 2017-07 | Restatement Adjustment        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   1,136   2,260
Deductions from operating profit:        
Non-service pension expense   1,707   3,400
Corporate and other expenses, net   (571)   (1,140)
Aircraft Controls        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit 27,122 33,793 60,321 64,836
Aircraft Controls | Previously Reported        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   33,480   64,248
Aircraft Controls | ASC 2017-07 | Restatement Adjustment        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   313   588
Space And Defense Controls        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit 20,504 17,042 38,977 33,515
Space And Defense Controls | Previously Reported        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   16,841   33,130
Space And Defense Controls | ASC 2017-07 | Restatement Adjustment        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   201   385
Industrial Systems        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit $ 30,228 (5,428) $ 57,933 14,483
Industrial Systems | Previously Reported        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   (6,050)   13,196
Industrial Systems | ASC 2017-07 | Restatement Adjustment        
New Accounting Pronouncements or Change in Accounting Principle        
Operating profit   $ 622   $ 1,287