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Supplemental Balance Sheet Information (Schedule Of Selected Supplemental Balance Sheet Information) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Sep. 30, 2023
Dec. 31, 2022
Sep. 30, 2022
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 216.7 $ 160.3 $ 125.6 $ 146.5
Inventories:        
Purchased components and raw material 169.0 176.9    
Work in process 66.5 60.0    
Finished goods 75.8 61.0    
Inventories, net 311.3 297.9    
Prepaid Expense and Other Assets, Current [Abstract]        
Prepaid Expense 18.4 17.8    
Nontrade Receivables 2.4 1.7    
Maintenance and repair tooling 4.4 4.1    
Income taxes 0.8 0.8    
Nontrade Receivables, Current 1.8 2.2    
Other 5.7 4.9    
Other 33.5 31.5    
Property, plant and equipment:        
Land 6.5 6.4    
Buildings 118.0 117.2    
Machinery and equipment 528.2 525.8    
Construction in progress 40.5 36.9    
Property, plant and equipment, gross 693.2 686.3    
Accumulated depreciation (384.8) (374.6)    
Property, plant and equipment net 308.4 311.7    
Other Assets, Noncurrent [Abstract]        
Operating lease, Right-of-Use asset 29.9 23.6    
us-Maintenance, repair and tooling supplies 21.8 21.1    
Nontrade Receivables, Noncurrent 2.4 2.4    
Assets for Plan Benefits, Defined Benefit Plan 6.2 6.6    
Other Receivables 1.8 1.8    
Debt Issuance Costs, Noncurrent, Net 0.6 0.7    
Other Assets, Miscellaneous, Noncurrent 0.7 2.6    
Other noncurrent assets $ 63.4 $ 58.8