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Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) - USD ($)
$ in Millions
 3 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]    
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents $ 125.6 $ 146.5
Inventories:    
Purchased components and raw material 200.2 181.8
Work in process 56.0 56.8
Finished goods 57.8 40.1
Inventories, net 314.0 278.7
Prepaid Expense and Other Assets, Current [Abstract]    
Prepaid Expense 18.1 14.6
Nontrade Receivables 2.3 1.6
Maintenance and repair tooling 3.2 2.8
Income taxes 0.8 0.8
Other Receivables 2.5 2.6
Other 3.5 4.4
Other 30.4 26.8
Property, plant and equipment:    
Land 5.7 5.7
Buildings 86.5 87.6
Machinery and equipment 453.4 456.0
Construction in progress 110.1 104.7
Property, plant and equipment, gross 655.7 654.0
Accumulated depreciation (352.8) (352.4)
Property, plant and equipment net 302.9 301.6
Other Assets, Noncurrent [Abstract]    
Operating lease, Right-of-Use asset 25.1 26.0
us-Maintenance, repair and tooling supplies 20.4 20.4
Nontrade Receivables, Noncurrent 3.6 3.6
Assets for Plan Benefits, Defined Benefit Plan 0.4 0.6
Notes Receivable, Related Parties, Noncurrent 1.8 1.7
Debt Issuance Costs, Noncurrent, Net 0.9 1.0
Other Assets, Miscellaneous, Noncurrent 4.0 3.4
Other noncurrent assets 56.2 56.7
Goodwill, Foreign Currency Translation Gain (Loss) 1.4  
Goodwill $ 100.0 $ 98.6