Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Other (Details)

v3.5.0.2
Summary of Significant Accounting Policies - Other (Details) - USD ($)
 12 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2014
Jul. 24, 2008
Investments        
Maximum amount of additional funding commitments on certain investments $ 1,000,000      
Treasury Stock        
Maximum amount of common stock repurchases       $ 100,000,000.0
Treasury Stock, Shares, Acquired 2,800,000      
Shares repurchased and classified as treasury stock $ 0      
Shares Repurchased 700,000      
Shares repurchased (in dollars) $ 21,200,000 $ 11,200,000 $ 16,500,000  
Shares issued from treasury stock under various stock compensation programs (in shares) 800,000 300,000    
Remaining amount of share repurchases $ 28,600,000      
Preferred stock        
Authorized shares of preferred stock (in shares) 1,000,000      
Preferred stock par value (in dollars per share) $ 0 $ 0    
Shares issued 0 0    
Accumulated other comprehensive loss        
Currency translation $ (61,600,000) $ (52,100,000)    
Pension and postretirement (net of taxes of $34.1 and $29.3) (67,500,000) (54,400,000)    
Unrealized loss on derivative instruments (net of taxes of $0.5 and $0.8) (700,000) (1,400,000)    
Accumulated other comprehensive loss (129,800,000) (107,900,000)    
Pension and postretirement, taxes 34,100,000 29,300,000    
Unrealized gain (loss) on derivative instruments, taxes $ 500,000 $ 800,000    
Revenue recognition        
Revenue from long-term manufacturing contracts as a percentage of total revenue 24.00% 25.00% 25.00%  
Research and Development Costs        
Research and development costs $ 12,600,000 $ 12,700,000 $ 14,400,000  
Warranty costs        
Warranty reserves 16,600,000 18,200,000    
Warranty costs 4,300,000 4,000,000 4,500,000  
Recently Adopted Accounting Standards        
Income tax expense 47,300,000 49,100,000 $ 48,700,000  
Cash Flow Hedging | Foreign Exchange Forward        
Derivative instruments and hedging activity        
Aggregate notional value of derivatives $ 208,300,000 136,700,000    
Minimum        
Investments        
Period for additional funding 3 years      
Warranty costs        
Period over which Process equipment group offers warranty 1 year      
Derivative instruments and hedging activity        
Term of foreign currency exchange forward contracts 1 year      
Maximum        
Investments        
Period for additional funding 5 years      
Self-Insurance        
Deductibles and self-insured retentions per occurrence $ 500,000      
Warranty costs        
Period over which Process equipment group offers warranty 2 years      
Derivative instruments and hedging activity        
Term of foreign currency exchange forward contracts 24 months      
Business acquisitions and related business acquisition and transition costs        
Measurement period over which initial purchase price allocations are subject to revision 1 year      
Carrying Value        
Investments        
Carrying amount of private equity limited partnerships for which fair value is not readily available $ 7,600,000 8,300,000    
Derivative instruments and hedging activity        
Derivative Asset 1,400,000 1,100,000    
Derivative Liability 3,300,000 $ 5,800,000    
Adjustments for New Accounting Pronouncement        
Recently Adopted Accounting Standards        
Income tax expense $ 2,400,000.0      
Weighted Average Number Diluted Shares Outstanding Adjustment 20,000