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Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Sep. 30, 2024
Dec. 31, 2023
Sep. 30, 2023
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 338.2 $ 309.9 $ 216.7 $ 160.3
Inventories:        
Purchased components and raw material 166.1 163.6    
Work in process 66.9 65.8    
Finished goods 84.8 72.3    
Inventories, net 317.8 301.7    
Prepaid Expense and Other Assets, Current [Abstract]        
Prepaid Expense 19.3 17.2    
Nontrade Receivables 2.9 3.4    
Maintenance and repair tooling 5.1 5.4    
Other Inventory, Gross 4.0 4.2    
Income taxes 0.8 0.8    
Nontrade Receivables, Current 2.4 2.4    
Other 6.9 4.5    
Other 41.4 37.9    
Property, plant and equipment:        
Land 6.5 6.5    
Buildings 127.9 126.6    
Machinery and equipment 553.1 550.4    
Construction in progress 51.7 45.2    
Property, plant and equipment, gross 739.2 728.7    
Accumulated depreciation (418.5) (409.9)    
Property, plant and equipment net 320.7 318.8    
Other Assets, Noncurrent [Abstract]        
Operating lease, Right-of-Use asset 26.4 26.9    
us-Maintenance, repair and tooling supplies 18.6 20.3    
Nontrade Receivables, Noncurrent 4.1 4.1    
Assets for Plan Benefits, Defined Benefit Plan 14.0 13.5    
Other Receivables 1.8 1.8    
Debt Issuance Costs, Noncurrent, Net 1.2 1.3    
Other Assets, Miscellaneous, Noncurrent 0.3 0.4    
Other noncurrent assets $ 66.4 $ 68.3