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Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2021 | Sep. 30, 2020 | Jun. 30, 2020
Inventories: |  |  |  |
Purchased components and raw material | $ 102.2 | $ 102.2 | $ 87.3 |
Work in process | 31.2 | 31.2 | 32.4 |
Finished goods | 43.5 | 43.5 | 42.8 |
Inventories, net | 176.9 | 176.9 | 162.5 |
Prepaid Expense and Other Assets, Current [Abstract] |  |  |  |
Prepaid Expense | 10.7 | 10.7 | 10.9 |
Nontrade Receivables | 7.1 | 7.1 | 8.5 |
Other Receivables | 1.1 | 1.1 |  | $ 0.0
Maintenance and repair tooling | 2.7 | 2.7 | 3.7 |
Income taxes | 0.6 | 0.6 | 5.5 |
Other | 4.0 | 4.0 | 0.4 |
Other | 26.2 | 26.2 | 29.0 |
Property, plant and equipment: |  |  |  |
Land | 6.1 | 6.1 | 6.2 |
Buildings | 81.6 | 81.6 | 80.4 |
Machinery and equipment | 428.4 | 428.4 | 406.3 |
Construction in progress | 76.0 | 76.0 | 57.4 |
Property, plant and equipment, gross | 592.1 | 592.1 | 550.3 |
Accumulated depreciation | (316.8) | (316.8) | (296.5) |
Property, plant and equipment net | 275.3 | 275.3 | 253.8 |
Other Assets, Noncurrent [Abstract] |  |  |  |
Operating lease, Right-of-Use asset | 24.0 | 24.0 | 25.6 |
us-Maintenance, repair and tooling supplies | 19.1 | 19.1 | 17.5 |
Nontrade Receivables, Noncurrent | 3.2 | 3.2 | 0.0 |
Assets for Plan Benefits, Defined Benefit Plan | 4.2 | 4.2 | 0.9 |
Notes Receivable, Related Parties, Noncurrent | 1.8 | 1.8 | 1.8 |
Debt Issuance Costs, Noncurrent, Net | 1.4 | 1.4 | 1.3 |
Other Assets, Miscellaneous, Noncurrent | 5.2 | 5.2 | 4.2 |
Other noncurrent assets | 58.9 | 58.9 | 51.3 |
Workers' Compensation Liability, Current | 3.6 | 3.6 | 2.7 |
Goodwill, Foreign Currency Translation Gain (Loss) |  | 2.6 |  |
Goodwill | 116.0 | $ 116.0 | $ 99.8 |
Goodwill, Acquired During Period | $ 13.6 |  |  |

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