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Revenue (Schedule of Revenue Recognition Time) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation Of Revenue [Line Items]
Net sales	$ 523,826	$ 752,005	$ 1,964,401	$ 2,163,660
Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	236,732	338,710	927,566	1,046,692
Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	287,094	413,295	1,036,835	1,116,968
Aerospace [Member]
Disaggregation Of Revenue [Line Items]
Net sales	306,494	498,775	1,254,655	1,374,616
Aerospace [Member] | Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	98,228	191,516	464,068	563,713
Aerospace [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	208,266	307,259	790,587	810,903
Industrial [Member]
Disaggregation Of Revenue [Line Items]
Net sales	217,332	253,230	709,746	789,044
Industrial [Member] | Point In Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	138,504	147,194	463,498	482,979
Industrial [Member] | Over Time [Member]
Disaggregation Of Revenue [Line Items]
Net sales	$ 78,828	$ 106,036	$ 246,248	$ 306,065

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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