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v3.19.3

Segment Information (Narrative) (Details) - segment | 12 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2017
Segment, Reporting Information [Line Items] |  |  |
Number of Reportable Segments | 2 |  |
The Boeing Company [Member] | Sales [Member] |  |  |
Segment, Reporting Information [Line Items] |  |  |
Percentage of total attributable to major customer | 15.00% | 12.00% | 11.00%
The Boeing Company [Member] | Trade Accounts Receivable [Member] |  |  |
Segment, Reporting Information [Line Items] |  |  |
Percentage of total attributable to major customer | 14.00% | 14.00% |
General Electric [Member] | Sales [Member] |  |  |
Segment, Reporting Information [Line Items] |  |  |
Percentage of total attributable to major customer | 14.00% | 16.00% | 16.00%
General Electric [Member] | Trade Accounts Receivable [Member] |  |  |
Segment, Reporting Information [Line Items] |  |  |
Percentage of total attributable to major customer | 8.00% | 8.00% |
U.S. Government Related [Member] | Sales [Member] |  |  |
Segment, Reporting Information [Line Items] |  |  |
Percentage of total attributable to major customer | 23.00% | 23.00% | 23.00%
U.S. Government Related [Member] | Trade Accounts Receivable [Member] |  |  |
Segment, Reporting Information [Line Items] |  |  |
Percentage of total attributable to major customer | 5.00% | 3.00% |

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