Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Trade receivables, Inventories and Property, plant, and equipment (Details)

v3.21.2
Summary of Significant Accounting Policies - Trade receivables, Inventories and Property, plant, and equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2019
Trade Receivables      
Reserve for trade receivables $ 26.0 $ 24.0  
Inventories      
Percentage of inventories determined by LIFO method 10.00%    
Difference in valuation if the FIFO method of inventory accounting had been used for all inventories $ 16.2 14.9  
Raw materials and components 153.1 133.3  
Work in process 104.0 88.7  
Finished goods 154.5 163.4  
Total inventories 411.6 385.4  
Properties      
Depreciation expense 56.1 55.7 $ 23.2
Cost 676.7 656.3  
Accumulated Depreciation $ (381.6) (342.1)  
Minimum      
Properties      
Finite-Lived Intangible Asset, Useful Life 3 years    
Maximum      
Properties      
Finite-Lived Intangible Asset, Useful Life 21 years    
Land and land improvements      
Properties      
Cost $ 26.2 27.8  
Accumulated Depreciation (3.8) (3.6)  
Buildings and building equipment      
Properties      
Cost 164.7 159.4  
Accumulated Depreciation $ (79.1) (70.1)  
Buildings and building equipment | Minimum      
Properties      
Estimated useful lives 3 years    
Buildings and building equipment | Maximum      
Properties      
Estimated useful lives 50 years    
Machinery and equipment      
Properties      
Cost $ 485.8 469.1  
Accumulated Depreciation $ (298.7) $ (268.4)  
Machinery and equipment | Minimum      
Properties      
Estimated useful lives 3 years    
Machinery and equipment | Maximum      
Properties      
Estimated useful lives 25 years