Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Other (Details)

v3.8.0.1
Summary of Significant Accounting Policies - Other (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2015
Feb. 23, 2017
Jul. 24, 2008
Increase (Decrease) in Deferred Income Taxes $ 7,400,000          
Treasury Stock            
Maximum amount of common stock repurchases 200,000,000 $ 200,000,000     $ 100,000,000 $ 100,000,000
Treasury Stock, Shares, Acquired   3,600,000        
Shares Repurchased And Classified As Treasury Stock Value   $ 99,400,000        
Shares Repurchased   778,000        
Shares repurchased (in dollars)   $ 28,000,000 $ 21,200,000 $ 11,200,000    
Shares issued from treasury stock under various stock compensation programs (in shares)   700,000 800,000      
Remaining amount of share repurchases $ 100,600,000 $ 100,600,000        
Preferred stock            
Authorized shares of preferred stock (in shares) 1,000,000 1,000,000        
Preferred stock par value (in dollars per share) $ 0 $ 0 $ 0      
Shares issued 0 0 0      
Accumulated other comprehensive loss            
Currency translation $ (36,900,000) $ (36,900,000) $ (61,600,000)      
Pension and postretirement (net of taxes of $23.4 and $34.1) (45,300,000) (45,300,000) (67,500,000)      
Unrealized gain (loss) on derivative instruments (net of taxes of $0.8 and $0.5) 1,000,000 1,000,000 (700,000)      
Accumulated other comprehensive loss (81,200,000) (81,200,000) (129,800,000)      
Pension and postretirement, taxes 23,400,000 23,400,000 34,100,000      
Unrealized gain (loss) on derivative instruments, taxes 800,000 $ 800,000 $ 500,000      
Revenue recognition            
Revenue from long-term manufacturing contracts as a percentage of total revenue   25.00% 24.00% 25.00%    
Research and Development Costs            
Research and development costs   $ 11,900,000 $ 12,600,000 $ 12,700,000    
Warranty costs            
Warranty reserves 15,800,000 15,800,000 16,600,000      
Warranty costs   4,100,000 4,300,000 4,000,000    
Recently Adopted Accounting Standards            
Income tax expense   59,900,000 47,300,000 $ 49,100,000    
Cash Flow Hedging | Foreign Exchange Forward            
Derivative instruments and hedging activity            
Aggregate notional value of derivatives 262,400,000 $ 262,400,000 208,300,000      
Minimum            
Standard Product Warranty Period   1 year        
Maximum            
Standard Product Warranty Period   2 years        
Self-Insurance            
Deductibles and self-insured retentions per occurrence   $ 500,000        
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 1,400,000 $ 1,400,000 7,600,000      
Derivative instruments and hedging activity            
Derivative Asset 3,800,000 3,800,000 1,400,000      
Derivative Liability 2,300,000 2,300,000 3,300,000      
Adjustments for New Accounting Pronouncement            
Debt Issuance Costs, Net $ 900,000 $ 900,000 $ 1,200,000