Annual report pursuant to Section 13 and 15(d)

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

v3.5.0.2
Summary of Significant Accounting Policies - Trade receivables, Inventories and Property, plant, and equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Trade Receivables      
Reserve for trade receivables $ (21.0) $ (20.0)  
Inventories      
Percentage of inventories determined by LIFO method 32.00% 28.00%  
Difference in valuation if the FIFO method of inventory accounting had been used for all inventories $ 15.2 $ 14.7  
Raw materials and components 51.4 40.1  
Work in process 54.0 63.9  
Finished goods 47.7 49.6  
Total inventories 153.1 153.6  
Properties      
Depreciation expense 25.6 26.2 $ 26.8
Cost 451.9 453.5  
Accumulated Depreciation (299.4) (295.2)  
Land and land improvements      
Properties      
Cost 17.3 15.1  
Accumulated Depreciation (3.6) (3.7)  
Buildings and building equipment      
Properties      
Cost 105.6 101.9  
Accumulated Depreciation $ (64.3) (60.5)  
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 $ 329.0 336.5  
Accumulated Depreciation $ (231.5) $ (231.0)  
Machinery and equipment | Minimum      
Properties      
Estimated useful lives 3 years    
Machinery and equipment | Maximum      
Properties      
Estimated useful lives 25 years