Annual report pursuant to Section 13 and 15(d)

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

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Summary of Significant Accounting Policies - Trade receivables, Inventories and Property, plant, and equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2013
Trade Receivables      
Reserve for trade receivables $ 20.0 $ 19.2  
Inventories      
Percentage of inventories determined by LIFO method 28.00% 26.00%  
Difference in valuation if the FIFO method of inventory accounting had been used for all inventories $ 14.7 $ 14.4  
Raw materials and components 40.1 53.2  
Work in process 63.9 73.3  
Finished goods 49.6 42.0  
Total inventories 153.6 168.5  
Properties      
Depreciation expense 26.2 26.8 $ 25.4
Cost 453.5 437.8  
Accumulated Depreciation (295.2) (278.3)  
Land and land improvements      
Properties      
Cost 15.1 15.5  
Accumulated Depreciation (3.7) (3.5)  
Buildings and building equipment      
Properties      
Cost 101.9 99.4  
Accumulated Depreciation $ (60.5) (58.4)  
Buildings and building equipment | Minimum      
Properties      
Estimated useful lives 5 years    
Buildings and building equipment | Maximum      
Properties      
Estimated useful lives 45 years    
Machinery and equipment      
Properties      
Cost $ 336.5 322.9  
Accumulated Depreciation $ (231.0) $ (216.4)  
Machinery and equipment | Minimum      
Properties      
Estimated useful lives 2 years    
Machinery and equipment | Maximum      
Properties      
Estimated useful lives 20 years